Analysis Overview
SHA256
31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a
Threat Level: Known bad
The file 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Modifies file permissions
Checks computer location settings
Looks up external IP address via web service
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 10:22
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 10:22
Reported
2024-05-22 10:25
Platform
win10v2004-20240426-en
Max time kernel
144s
Max time network
127s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| 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" | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3328 set thread context of 1132 | N/A | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe |
| PID 4480 set thread context of 2904 | N/A | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\379a6e85-a20f-4865-ac70-6e39d173a1e3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.65.21.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| KW | 62.150.232.50:80 | cajgtus.com | tcp |
| NL | 23.62.61.99:443 | www.bing.com | tcp |
| MX | 187.212.249.248:80 | sdfjhuz.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| KW | 62.150.232.50:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 99.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.232.150.62.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 248.249.212.187.in-addr.arpa | udp |
| NL | 23.62.61.99:443 | www.bing.com | tcp |
| KW | 62.150.232.50:80 | cajgtus.com | tcp |
| KW | 62.150.232.50:80 | cajgtus.com | tcp |
| KW | 62.150.232.50:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
Files
memory/3328-2-0x0000000004A10000-0x0000000004B2B000-memory.dmp
memory/3328-1-0x0000000004970000-0x0000000004A05000-memory.dmp
memory/1132-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\379a6e85-a20f-4865-ac70-6e39d173a1e3\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
| MD5 | 10d7f2ef729dae9b14dce2ffd23a4f68 |
| SHA1 | cf087763472d322312bbfdcb7d5cc226f5b555b8 |
| SHA256 | 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a |
| SHA512 | 25181f93d725513facbb00cf309a9caf17e4ddd57e841567c2c364aedbb1ef0e07b499324c277345867eb13504474367452b92ba9862495908365d7d52527fbb |
memory/1132-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-20-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6728aea2631b86a76c237508d8ba9b55 |
| SHA1 | 7a670f95cac088313f7558869162fe01c6dc0ec9 |
| SHA256 | e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b |
| SHA512 | 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 84553318261066c97d4405b5daf87405 |
| SHA1 | 51003aecbdd8b9b9ef760d976f888e9f2be4040b |
| SHA256 | 8b9d5ec274ab02b7baa8d3359ab63d32ef96f1d9fbba8897f58cda631a840cd5 |
| SHA512 | 51a7a0c340cb1f3efa0a0bb2b39372da290f244c3f6022456845e78e6ea996df8b2254b49ea9b2f75c1af9197a1e635e6479fcf2998c60796b2addd56520a9b6 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 493b38ac086d608fe1e05706852a1103 |
| SHA1 | 0ff5977071634d72de5fc8bb8017d27bc79a099d |
| SHA256 | c27c95579db257c1040980db8763ba10b6e07b5d6c34f198908c034c1a69ac80 |
| SHA512 | 1d73b3c497b2a0c017b85a0ec3b3a4e7c5ff385706d72824c4e90e76d36dcabaf9fa3ca4349a0c6313f6b5ddf47f791df06a59fb20960be7177f29997cfd6719 |
memory/2904-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2904-35-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-22 10:22
Reported
2024-05-22 10:25
Platform
win11-20240426-en
Max time kernel
144s
Max time network
123s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Djvu Ransomware
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\903cbbbf-23d3-4833-9f59-0a7d6c3c428a\\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4156 set thread context of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe |
| PID 4728 set thread context of 352 | N/A | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe | C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\903cbbbf-23d3-4833-9f59-0a7d6c3c428a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
"C:\Users\Admin\AppData\Local\Temp\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| MX | 187.225.243.180:80 | cajgtus.com | tcp |
| MO | 122.100.154.145:80 | sdfjhuz.com | tcp |
| MX | 187.225.243.180:80 | cajgtus.com | tcp |
| MX | 187.225.243.180:80 | cajgtus.com | tcp |
| MX | 187.225.243.180:80 | cajgtus.com | tcp |
| MX | 187.225.243.180:80 | cajgtus.com | tcp |
Files
memory/4156-1-0x0000000004A30000-0x0000000004ACE000-memory.dmp
memory/4156-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp
memory/3060-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3060-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3060-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3060-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\903cbbbf-23d3-4833-9f59-0a7d6c3c428a\31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a.exe
| MD5 | 10d7f2ef729dae9b14dce2ffd23a4f68 |
| SHA1 | cf087763472d322312bbfdcb7d5cc226f5b555b8 |
| SHA256 | 31737b9b2bbf67f0cb82fc48f01693c606df83f58f1dbb21b0946da2406b341a |
| SHA512 | 25181f93d725513facbb00cf309a9caf17e4ddd57e841567c2c364aedbb1ef0e07b499324c277345867eb13504474367452b92ba9862495908365d7d52527fbb |
memory/3060-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6728aea2631b86a76c237508d8ba9b55 |
| SHA1 | 7a670f95cac088313f7558869162fe01c6dc0ec9 |
| SHA256 | e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b |
| SHA512 | 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6fe3d5224be209069852716076fe610f |
| SHA1 | d12dcd9daceeb51f0aded0aafc6037870178c9e1 |
| SHA256 | cf3e8ee6650531f3fc721606bcf6743e8879e8a14bcbd22c182b2c48b9a7e7a0 |
| SHA512 | 9c76c3434469e3fb368a3527a152135699aac08012ae919d2dc1c62775528cecf14c11bdafb05f9c8a1594269a4f22b3836ddfb4b5ef3781775d141f562e542a |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | b77b7c914c3a9b42377f56fb2ca46b42 |
| SHA1 | af41e4b2c796200699e34752114329c1ad8e1d81 |
| SHA256 | e33aaa014c8d92462efc4dde7a0f794336054cfed8fd1e570f5b49f91bf69423 |
| SHA512 | 272af9666ab7b5cb57768d9ca738d8977f2c7dce47f1557392f7ebeb79b9be6a0c634e6afcfc6deefdbc068e534d6d9577c6f3fbcdbc384c05f8c5fb5442c68b |
memory/352-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/352-37-0x0000000000400000-0x0000000000537000-memory.dmp