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MalwareRansomwareUsed by 1 actor

Saint Bot

Saint Bot is a malware loader/bot associated in the provided content with the threat actor Saint Bear. It has been delivered via spearphishing emails as malicious attachments and malicious links, including malicious Microsoft Office files containing an embedded JavaScript object that downloads and executes OutSteel and Saint Bot. Execution has relied on user interaction with phishing content, and the malware has used PowerShell for execution. The Saint Bot loader has been observed spawning MSBuild.exe in a suspended state via API calls and injecting the decrypted Saint Bot binary into it. For persistence, Saint Bot creates a scheduled task named "Maintenance." It performs environmental checks including registry-key checks and system locale checks to determine whether the compromised host is located in Russia, Ukraine, Belarus, Armenia, Kazakhstan, or Moldova. The malware has used Base64 to encode command-and-control communications, has been packed with a dark market crypter, has been disguised as a legitimate executable including as Windows SDK, and has attempted privilege escalation by bypassing UAC through fodhelper.exe. High-confidence behaviors in the content indicate targeting of Windows systems through phishing-based initial access, with anti-analysis or execution-guard logic based on host environment and locale.

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THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

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Ember Bear

Saint Bear has delivered malicious Microsoft Office files containing an embedded JavaScript object that would, on execution, download and execute OutSteel and Saint Bot.

via mitre attack websiteattack.mitre.org
MITRE ATT&CK

Techniques & procedures

30 distinct techniques documented for this family, organized by ATT&CK tactic.

Reconnaissance

1 technique
T1592Gather Victim Host InformationEvidence1

Volt Typhoon has obtained the victim's system current location.

Initial Access

2 techniques
T1566.001Spearphishing AttachmentEvidence1

The content repeatedly describes threat actors and malware being delivered through phishing or spearphishing emails containing malicious attachments such as Microsoft Office documents, PDFs, RAR/ZIP archives, CHM, ISO, IMG, HTA, LNK, and executable files disguised as documents.

T1566.002Spearphishing LinkEvidence1

Multiple actors and malware families are described as being delivered via spearphishing/phishing emails containing malicious links (e.g., APT28 used URL shorteners to redirect to credential harvesting sites; APT29 used links to ZIP files; APT33 used links to .hta files; BlackTech used links to cloud services; Wizard Spider used links to Google Drive/free file hosting).

Execution

6 techniques
T1053Scheduled Task/JobEvidence1

“Sandworm Team leveraged Scheduled Tasks through a Group Policy Object (GPO) to execute CaddyWiper at a predetermined time.” / “APT29 used scheduler and schtasks to create new tasks on remote host as part of their lateral movement… updating an existing legitimate task to execute their tools and then returned the scheduled task to its original configuration.”

T1053.005Scheduled TaskEvidence2

During the 2022 Ukraine Electric Power Attack, Sandworm Team leveraged Scheduled Tasks through a Group Policy Object (GPO) to execute CaddyWiper at a predetermined time.

T1059.001PowerShellEvidence2
TacticExecution

The content repeatedly describes threat actors and malware using PowerShell scripts/commands for execution, download, staging, reconnaissance, persistence, credential access, lateral movement, and defense evasion; e.g., "Sandworm Team used PowerShell scripts to run a credential harvesting tool in memory to evade defenses."

T1059.003Windows Command ShellEvidence2
TacticExecution

During the 2016 Ukraine Electric Power Attack, Sandworm Team used the xp_cmdshell command in MS-SQL. During the 2025 Poland Wiper Attacks, the adversaries leveraged PsExec to run cmd.exe commands on multiple victim machines. Numerous malware families and groups are described as using cmd.exe, cmd /c, Windows command shell, or command-line interfaces to execute commands, payloads, reconnaissance, persistence, cleanup, and ransomware actions. | APT1 has used the Windows command shell to execute commands, and batch scripting to automate execution. Blue Mockingbird has used batch script files to automate execution and deployment of payloads. During HomeLand Justice, threat actors used Windows batch files for persistence and execution.

T1204User ExecutionEvidence1
TacticExecution

The content repeatedly describes victims being lured into opening malicious attachments, enabling macros, launching installers, clicking embedded files/links, or otherwise directly executing malicious content.

T1204.002Malicious FileEvidence1
TacticExecution

Examples include: "Sandworm Team leveraged Microsoft Office attachments which contained malicious macros..."; "Bumblebee has relied upon a user opening an ISO file to enable execution of malicious shortcut files and DLLs"; "Lumma Stealer has gained initial execution through victims opening malicious executable files embedded in zip archives, and MSI files within RAR files."

Persistence

4 techniques
T1053Scheduled Task/JobEvidence1

“Sandworm Team leveraged Scheduled Tasks through a Group Policy Object (GPO) to execute CaddyWiper at a predetermined time.” / “APT29 used scheduler and schtasks to create new tasks on remote host as part of their lateral movement… updating an existing legitimate task to execute their tools and then returned the scheduled task to its original configuration.”

T1053.005Scheduled TaskEvidence2

During the 2022 Ukraine Electric Power Attack, Sandworm Team leveraged Scheduled Tasks through a Group Policy Object (GPO) to execute CaddyWiper at a predetermined time.

T1547Boot or Logon Autostart ExecutionEvidence1

Examples include: 'APT28 has deployed malware that has copied itself to the startup directory for persistence' and 'APT29 added Registry Run keys to establish persistence.'

T1547.001Registry Run Keys / Startup FolderEvidence3

The content repeatedly describes malware and threat actors establishing persistence by adding values under HKCU/HKLM\Software\Microsoft\Windows\CurrentVersion\Run or RunOnce, and by placing executables, scripts, or .lnk files in the Startup folder.

T1053Scheduled Task/JobEvidence1

“Sandworm Team leveraged Scheduled Tasks through a Group Policy Object (GPO) to execute CaddyWiper at a predetermined time.” / “APT29 used scheduler and schtasks to create new tasks on remote host as part of their lateral movement… updating an existing legitimate task to execute their tools and then returned the scheduled task to its original configuration.”

T1053.005Scheduled TaskEvidence2

During the 2022 Ukraine Electric Power Attack, Sandworm Team leveraged Scheduled Tasks through a Group Policy Object (GPO) to execute CaddyWiper at a predetermined time.

T1055.012Process HollowingEvidence1

"Denis ... used the Wow64SetThreadContext API as part of a process hollowing process"; "DarkGate can call kernel mode functions directly to hide the use of process hollowing methods"

T1547Boot or Logon Autostart ExecutionEvidence1

Examples include: 'APT28 has deployed malware that has copied itself to the startup directory for persistence' and 'APT29 added Registry Run keys to establish persistence.'

T1547.001Registry Run Keys / Startup FolderEvidence3

The content repeatedly describes malware and threat actors establishing persistence by adding values under HKCU/HKLM\Software\Microsoft\Windows\CurrentVersion\Run or RunOnce, and by placing executables, scripts, or .lnk files in the Startup folder.

T1548.002Bypass User Account ControlEvidence1

"...has presented the user with a UAC prompt to elevate privileges..."; "...has bypassed UAC..."; "...bypass Windows UAC...execute the next payload with higher privileges."

Stealth

8 techniques
T1027Obfuscated Files or InformationEvidence2
TacticStealth

The content repeatedly describes malware and threat actors using obfuscated code, encrypted strings, Base64/XOR/RC4/AES encoding, VMProtect/ConfuserEx/SmartAssembly, stack strings, control-flow flattening, opaque predicates, and hidden payloads to evade analysis and detection.

T1027.002Software PackingEvidence1
TacticStealth

"Sandworm Team used UPX to pack a copy of Mimikatz"; "APT38 has used several code packing methods such as Themida, Enigma, VMProtect, and Obsidium"; "Lazarus Group packed malicious .db files with Themida to evade detection."

T1036MasqueradingEvidence2
TacticStealth

During the 2016 Ukraine Electric Power Attack, DLLs and EXEs with filenames associated with common electric power sector protocols were used to masquerade files.

T1036.005Match Legitimate Resource Name or LocationEvidence1
TacticStealth

Akira has used legitimate names and locations for files to evade defenses.

T1055.012Process HollowingEvidence1

"Denis ... used the Wow64SetThreadContext API as part of a process hollowing process"; "DarkGate can call kernel mode functions directly to hide the use of process hollowing methods"

T1070.004File DeletionEvidence5
TacticStealth

The content repeatedly describes threat actors and malware deleting files, tools, scripts, logs, droppers, staged data, and artifacts from compromised systems to cover tracks, remove evidence, or self-delete.

T1140Deobfuscate/Decode Files or InformationEvidence3
TacticStealth

The content repeatedly describes malware and threat actors decoding, decrypting, or deobfuscating payloads, strings, configuration data, commands, and C2 traffic prior to execution or use, e.g., 'APT28 macro uses the command certutil -decode to decode contents of a .txt file storing the base64 encoded payload' and 'Action RAT can use Base64 to decode actor-controlled C2 server communications.'

T1497.001System ChecksEvidence2

Several entries describe malware examining running processes to determine if a debugger, sandbox, virtual environment, or analysis/security tools are present, such as AsyncRAT checking for a debugger, RogueRobin enumerating Wireshark and Sysinternals processes, and P8RAT checking for processes associated with virtual environments.

Discovery

8 techniques
T1012Query RegistryEvidence2
TacticDiscovery

The content repeatedly describes malware and threat actors querying, enumerating, searching, reading, or checking Windows Registry keys and values, e.g., "ADVSTORESHELL can enumerate registry keys," "APT41 queried registry values to determine items such as configured RDP ports and network configurations," and "Reg may be used to gather details from the Windows Registry of a local or remote system at the command-line interface."

T1016System Network Configuration DiscoveryEvidence2
TacticDiscovery

The content repeatedly describes actors and malware using commands and APIs such as ipconfig /all, ifconfig, arp -a, route print, netsh interface show, GetAdaptersInfo, and GetIpNetTable to gather IP addresses, MAC addresses, DNS, DHCP, gateways, routing tables, ARP cache, proxy settings, and network adapter/interface details.

T1033System Owner/User DiscoveryEvidence1
TacticDiscovery

The content repeatedly describes malware and threat actors collecting usernames, identifying logged-in users, running whoami/query user/quser, checking admin status, and enumerating user sessions.

T1057Process DiscoveryEvidence1
TacticDiscovery

The content repeatedly describes malware and threat actors obtaining lists of running processes, using utilities such as tasklist, ps, WMI, Get-Process, CreateToolhelp32Snapshot, EnumProcesses, and similar APIs/commands to enumerate active processes on victim systems.

T1082System Information DiscoveryEvidence2
TacticDiscovery

The content repeatedly describes malware and threat actors collecting host details such as OS version, hostname, architecture, CPU, memory, BIOS, domain, language, and other configuration data; e.g., "APT41 uses multiple built-in commands such as systeminfo and net config Workstation to enumerate victim system basic configuration information."

T1083File and Directory DiscoveryEvidence1
TacticDiscovery

“3PARA RAT has a command to retrieve metadata for files on disk as well as a command to list the current working directory… admin@338 actors used… dir c:\ >> %temp%\download … APT28 has used Forfiles to locate PDF, Excel, and Word documents…”

T1497.001System ChecksEvidence2

Several entries describe malware examining running processes to determine if a debugger, sandbox, virtual environment, or analysis/security tools are present, such as AsyncRAT checking for a debugger, RogueRobin enumerating Wireshark and Sysinternals processes, and P8RAT checking for processes associated with virtual environments.

T1614System Location DiscoveryEvidence1
TacticDiscovery

"Amadey does not run any tasks or install additional malware if the victim machine is based in Russia"; "DarkGate queries system locale information... determine if the malware is executing in Russian-speaking countries"; "Ragnar Locker checks... GetLocaleInfoW and doesn't encrypt files if it finds a former Soviet country"; "Saint Bot has conducted system locale checks..."

Collection

1 technique
T1005Data from Local SystemEvidence2

The content repeatedly describes threat actors and malware collecting, stealing, identifying, copying, or staging files, documents, credentials, logs, databases, and other information from compromised hosts or local systems.

T1071.001Web ProtocolsEvidence2

The content repeatedly describes threat actors, malware, and campaigns using HTTP and/or HTTPS for command and control, including examples such as BlackEnergy communicating with C2 over HTTP POST requests and many other families using HTTP/S for C2.

T1132Data EncodingEvidence2

C2 traffic from ADVSTORESHELL is encrypted, then encoded with Base64 encoding... APT19 HTTP malware variant used Base64 to encode communications to the C2 server... APT33 has used base64 to encode command and control traffic.

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Threat actor attribution1

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping30

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.