Analysis
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max time kernel
144s -
max time network
127s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 10:22
Static task
static1
Behavioral task
behavioral1
Sample
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
Resource
win11-20240426-en
General
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Target
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
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Size
707KB
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MD5
10d7f2ef729dae9b14dce2ffd23a4f68
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SHA1
cf087763472d322312bbfdcb7d5cc226f5b555b8
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SHA256
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a
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SHA512
25181f93d725513facbb00cf309a9caf17e4ddd57e841567c2c364aedbb1ef0e07b499324c277345867eb13504474367452b92ba9862495908365d7d52527fbb
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SSDEEP
12288:qjXryfVBE2pamRANWTRawlSZut27FU1cuZivt6Lqg:qjXyExj6t87WA6L
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral1/memory/3328-2-0x0000000004A10000-0x0000000004B2B000-memory.dmp family_djvu behavioral1/memory/1132-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1132-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1132-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1132-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1132-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2904-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\379a6e85-a20f-4865-ac70-6e39d173a1e3\\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe\" --AutoStart" 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 6 api.2ip.ua 7 api.2ip.ua 14 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exedescription pid process target process PID 3328 set thread context of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 set thread context of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exepid process 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 2904 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 2904 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exedescription pid process target process PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 3328 wrote to memory of 1132 3328 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 1132 wrote to memory of 2464 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe icacls.exe PID 1132 wrote to memory of 2464 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe icacls.exe PID 1132 wrote to memory of 2464 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe icacls.exe PID 1132 wrote to memory of 4480 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 1132 wrote to memory of 4480 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 1132 wrote to memory of 4480 1132 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe PID 4480 wrote to memory of 2904 4480 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3328 -
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1132 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\379a6e85-a20f-4865-ac70-6e39d173a1e3" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2464 -
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4480 -
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2904
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD56728aea2631b86a76c237508d8ba9b55
SHA17a670f95cac088313f7558869162fe01c6dc0ec9
SHA256e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
SHA512533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD584553318261066c97d4405b5daf87405
SHA151003aecbdd8b9b9ef760d976f888e9f2be4040b
SHA2568b9d5ec274ab02b7baa8d3359ab63d32ef96f1d9fbba8897f58cda631a840cd5
SHA51251a7a0c340cb1f3efa0a0bb2b39372da290f244c3f6022456845e78e6ea996df8b2254b49ea9b2f75c1af9197a1e635e6479fcf2998c60796b2addd56520a9b6
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5493b38ac086d608fe1e05706852a1103
SHA10ff5977071634d72de5fc8bb8017d27bc79a099d
SHA256c27c95579db257c1040980db8763ba10b6e07b5d6c34f198908c034c1a69ac80
SHA5121d73b3c497b2a0c017b85a0ec3b3a4e7c5ff385706d72824c4e90e76d36dcabaf9fa3ca4349a0c6313f6b5ddf47f791df06a59fb20960be7177f29997cfd6719
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C:\Users\Admin\AppData\Local\379a6e85-a20f-4865-ac70-6e39d173a1e3\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
Filesize707KB
MD510d7f2ef729dae9b14dce2ffd23a4f68
SHA1cf087763472d322312bbfdcb7d5cc226f5b555b8
SHA25631737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a
SHA51225181f93d725513facbb00cf309a9caf17e4ddd57e841567c2c364aedbb1ef0e07b499324c277345867eb13504474367452b92ba9862495908365d7d52527fbb