Analysis Overview
SHA256
944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286
Threat Level: Known bad
The file 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Checks computer location settings
Modifies file permissions
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
2024-05-23 00:40
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-23 00:40
Reported
2024-05-23 00:43
Platform
win10v2004-20240508-en
Max time kernel
144s
Max time network
126s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.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-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1bd3e992-ab38-444b-af8b-fcea3a1de723\\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.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 4008 set thread context of 3760 | N/A | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe |
| PID 984 set thread context of 2772 | N/A | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\1bd3e992-ab38-444b-af8b-fcea3a1de723" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe" --Admin IsNotAutoStart IsNotTask
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=3940 /prefetch:8
Network
| Country | Destination | Domain | Proto |
| 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 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.65.21.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| KR | 211.202.224.10:80 | sdfjhuz.com | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 10.224.202.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.49.181.189.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.173.189.20.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 | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
memory/4008-1-0x0000000004910000-0x00000000049AE000-memory.dmp
memory/4008-2-0x00000000049B0000-0x0000000004ACB000-memory.dmp
memory/3760-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3760-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3760-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3760-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\1bd3e992-ab38-444b-af8b-fcea3a1de723\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
| MD5 | cca9237edd4e63088fea283e633dbd83 |
| SHA1 | 5bcfc7b04f39607d284e830d4996eee55b27153f |
| SHA256 | 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286 |
| SHA512 | 0e7b51516dfe659815ea9ea16346e02b0399776e126b96b0d4843ff2c2cf18044c5c294b62e9ccfd8908987aa7ec7f50f07e0bd49cd31ede4b223d63352b239f |
memory/3760-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-26-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 7575c39a544943a68ce6e709c586005a |
| SHA1 | 4874b30bd1d455b28a95c4e21c5aecd1ea043d7a |
| SHA256 | 4737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8 |
| SHA512 | abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1 |
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 | b123af24d20e4450408bd6bf5acd1a1b |
| SHA1 | 68c62539c667ee2d8cc1b9f257aaae3e2887d27b |
| SHA256 | 6a16e8b8371b9573692b150e98639223ec8c5302a466141c5a6b2c45a5e0c8d1 |
| SHA512 | ed734a0ad525b98b51675875959b2938f70cf0def46e8a3b393c646dbe74c7b5e25d9511a22942d871886cd132af98b9b5bc8f84521ad484b1ea583664fca3d6 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 269d47583e7e0d58e82d34c18810621d |
| SHA1 | 20d53f39858e34008cd5580f9effe411d7de3368 |
| SHA256 | 832cf38edc7999edb0b0f38c940fbde3dea69cf8c37b0bd035e41bccfb402610 |
| SHA512 | e800b6906c5d60b9f7bd9b731e2a94cf80c07e24ea7d7954030237783fb797b3755117db24e3b889f4560d5447ac0accb2c58b87237be6a8f0fec9b71b42f22d |
memory/2772-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-40-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-41-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-42-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2772-43-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-23 00:40
Reported
2024-05-23 00:43
Platform
win11-20240419-en
Max time kernel
143s
Max time network
125s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
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-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\29d93a45-dca2-49f7-a52c-194dc5f5b181\\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.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 4796 set thread context of 2768 | N/A | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe |
| PID 4740 set thread context of 564 | N/A | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe | C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\29d93a45-dca2-49f7-a52c-194dc5f5b181" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
"C:\Users\Admin\AppData\Local\Temp\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| 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 | 24.65.21.104.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| CR | 201.191.99.134:80 | cajgtus.com | tcp |
| KR | 211.202.224.10:80 | sdfjhuz.com | tcp |
| CR | 201.191.99.134:80 | cajgtus.com | tcp |
| CR | 201.191.99.134:80 | cajgtus.com | tcp |
| CR | 201.191.99.134:80 | cajgtus.com | tcp |
| CR | 201.191.99.134:80 | cajgtus.com | tcp |
Files
memory/4796-1-0x0000000004A10000-0x0000000004AAC000-memory.dmp
memory/4796-2-0x0000000004AB0000-0x0000000004BCB000-memory.dmp
memory/2768-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2768-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2768-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2768-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\29d93a45-dca2-49f7-a52c-194dc5f5b181\944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286.exe
| MD5 | cca9237edd4e63088fea283e633dbd83 |
| SHA1 | 5bcfc7b04f39607d284e830d4996eee55b27153f |
| SHA256 | 944caafd53b910f522348b9d82241855b1e1dd055da2d7db4930eef673d2c286 |
| SHA512 | 0e7b51516dfe659815ea9ea16346e02b0399776e126b96b0d4843ff2c2cf18044c5c294b62e9ccfd8908987aa7ec7f50f07e0bd49cd31ede4b223d63352b239f |
memory/2768-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 7575c39a544943a68ce6e709c586005a |
| SHA1 | 4874b30bd1d455b28a95c4e21c5aecd1ea043d7a |
| SHA256 | 4737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8 |
| SHA512 | abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1 |
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 | f2dfaade87c46824df94f1a640877ed0 |
| SHA1 | 07fe5d7ad4097b87c210bb46c31ce9909567ef08 |
| SHA256 | 21a6bf6bffc0eba476841beb1b65da99bf96eef7bf0d794ecaf515a9847c9049 |
| SHA512 | 6afd017ea562f4391f2f9a018aa91dbd1fbbe24f3016d25ff5b1a1c7418dbee4b76f1b4f86584f4dfdb78a619916ce0b672dba1a819bf5fe6279921be1b8a018 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | bf76ac4a412972243d3010463dad33ac |
| SHA1 | 9fab9d7724cc4875e1754affe44562d8b35e3990 |
| SHA256 | 7f9b97dfcb1b6647639f3f79ece1c67008766bc96a6719c2f8898319eeba3faf |
| SHA512 | 02c3e26d620c413a5a44f2313edb54f58797ea838fd80ad3334aa904f0ab54edce9a31032b376f44b019071247b2c78e84f007751be2b2fb177e9c1ffcc05767 |
memory/564-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/564-37-0x0000000000400000-0x0000000000537000-memory.dmp