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Bitter is an India-nexus cyber espionage threat actor tracked under aliases including APT-C-08, Bitter APT, Hazy Tiger, Manlinghua, TA397, and T-APT-17. The group is associated with long-running intelligence collection activity and has been linked to operations targeting organizations of geopolitical interest in South Asia, particularly Pakistan. Reported victimology includes Pakistani law enforcement and related public-sector entities, alongside broader references to targeting in the Middle East and other regions. Bitter commonly relies on spearphishing and socially engineered lures to obtain initial access, including malicious attachments and credential-harvesting pages impersonating legitimate services. The group has been observed stealing account credentials through phishing infrastructure and using staged payload delivery from actor-controlled infrastructure. Documented post-compromise behavior includes persistence via scripts and Windows services, information theft, remote command execution, and command-and-control over web protocols including HTTP POST. Available reporting also indicates use of privilege-escalation techniques and overlap in infrastructure, tooling, and tradecraft with other India-nexus clusters, including activity discussed alongside SideWinder, Confucius, and Mysterious Elephant/TAG-179. Bitter is best characterized as a state-aligned espionage actor focused on intelligence collection rather than financially motivated crime or ransomware operations.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
51 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
17 malware families attributed to this actor across reporting.
12 additional families tracked in Mallory.
9 CVEs this actor has used in observed campaigns. 9 of them exploited in the wild.
...has exploited client software vulnerabilities for execution, such as Microsoft Word CVE-2012-0158...
...has exploited Office vulnerabilities such as CVE-2017-11882...
BITTER has exploited Microsoft Office vulnerabilities... CVE-2018-0798...
...has exploited Microsoft Office vulnerabilities... CVE-2018-0802.
BITTER has exploited CVE-2021-1732 for privilege escalation.
4 more CVEs tied to this actor tracked in Mallory.
30 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Used phishing pages masquerading as an email service to steal credentials and deployed a VBS payload for persistence, theft, and remote command execution.
Referenced only as an India-nexus adversary with similarities to Mysterious Elephant.
Named as overlapping with TAG-179 in infrastructure, tooling, and TTPs in suspected India-nexus espionage against Pakistani law enforcement.
Listed as an annotation/tag associated with privilege escalation techniques in the detection content; no campaign or activity by the group is described in this reference.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.