Patchwork
Also known asDropping Elephant · Quilted Tiger · Hangover Group · Chinastrats · Operation Hangover
Summary
Cyberespionage group first observed in December 2015 (MITRE G0040) that MITRE says may be a pro-Indian or Indian entity, targeting diplomatic and government organisations; Arctic Wolf likewise describes it as suspected to be of Indian origin. It relies on spearphishing with malicious documents and links, exploiting Office vulnerabilities such as CVE-2017-0199 and CVE-2017-11882, and on tooling largely copied from online forums alongside custom malware such as BADNEWS. In March–April 2018 Volexity saw it spearphish US think tanks with lures mimicking CFR, CSIS and MERICS and per-recipient tracking links. ESET attributed with high confidence twelve trojanised Android messaging apps carrying the VajraSpy RAT (six on Google Play, April 2021–March 2023), mostly aimed at users in Pakistan. In July 2025 Arctic Wolf reported a Dropping Elephant campaign against Turkish defense contractors, including a precision-guided missile manufacturer, using conference-themed LNK lures and VLC DLL side-loading.
Attribution
Not definitively attributed
Hedged, circumstantial or press-only reporting; not established.
- MITRE ATT&CK (MITRE ATT&CK, 2026-10)
Circumstantial evidence: may be pro-Indian or Indian - Volexity (Research, 2018-06-07)
Describes an Indian APT group
Campaigns 3
| Campaign | Period | Targets | Sectors | Source |
|---|---|---|---|---|
| Turkish defense industry — conference-lure LNK and VLC side-loading | 2025-06 – 2025-07 | Turkey | Defense | Arctic Wolf (2025-07-23) |
| VajraSpy trojanised Android messaging apps | 2021-04 – 2023-09 | Pakistan | Individuals | ESET (2024-02-01) |
| US think-tank spearphishing (QuasarRAT) | 2018-03 – 2018-04 | USA | Think Tanks | Volexity (2018-06-07) |
Newest first. ASSESSED: tied to the actor with hedging or through an alias. CLAIMED: an allegation no independent source confirms.
MITRE ATT&CK techniques 12
| Reconnaissance1 | T1598.003Spearphishing Link |
|---|---|
| Initial Access2 | T1566.001Spearphishing AttachmentT1566.002Spearphishing Link |
| Execution2 | T1203Exploitation for Client ExecutionT1053.005Scheduled Task |
| Stealth2 | T1574.001DLLT1197BITS Jobs |
| Defense Impairment1 | T1553.002Code Signing |
| Credential Access1 | T1555.003Credentials from Web Browsers |
| Discovery1 | T1680Local Storage Discovery |
| Collection1 | T1119Automated Collection |
| Command and Control1 | T1102.001Dead Drop Resolver |
Malware and tools 8
| Name | Description | Platform |
|---|---|---|
| BADNEWS | Backdoor (RSS/forum dead-drop C2) | Windows |
| BackConfig | Plugin-based Trojan | Windows |
| NDiskMonitor | .NET backdoor | Windows |
| VajraSpy | Android RAT (trojanised messaging apps) | Android |
| QuasarRAT | Open-source RAT | Windows |
| TINYTYPHON | Backdoor | Windows |
| AutoIt backdoor | Backdoor | Windows |
| PowerSploit | PowerShell post-exploitation framework | Windows |
Exploited vulnerabilities 6
| CVE | CVSS | Detail |
|---|---|---|
| CVE-2012-1856 | 8.8 | Microsoft Windows Common Controls (TabStrip) — RCE (KEV 2022-03-03) |
| CVE-2014-4114 | 7.8 | Windows OLE "Sandworm" — RCE via PowerPoint (KEV 2022-03-03) |
| CVE-2015-1641 | 7.8 | Microsoft Word — memory corruption RCE (KEV 2021-11-03) |
| CVE-2017-0199 | 7.8 | Microsoft Office/WordPad — OLE/HTA remote code execution (KEV 2021-11-03) |
| CVE-2017-11882 | 7.8 | Microsoft Office Equation Editor — memory corruption RCE (KEV 2021-11-03) |
| CVE-2017-8570 | 7.8 | Microsoft Office — composite moniker RCE (KEV 2022-02-25) |
Highest CVSS first.
Infrastructure patterns
- Dead-drop resolvers: encrypted C2 locations in comments on legitimate websites (MITRE ATT&CK, 2026)
- C2 protocol that impersonates legitimate websites — as Dropping Elephant (Arctic Wolf, 2025)