Analysis Overview
SHA256
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08
Threat Level: Known bad
The file 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Checks computer location settings
Modifies file permissions
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 19:18
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 19:18
Reported
2024-05-22 19:20
Platform
win10v2004-20240426-en
Max time kernel
142s
Max time network
124s
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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2d6c7953-2aac-4621-b12c-c1439b7d44a4\\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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 3844 set thread context of 392 | N/A | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe |
| PID 5088 set thread context of 2796 | N/A | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\2d6c7953-2aac-4621-b12c-c1439b7d44a4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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 | 8.8.8.8:53 | 183.142.211.20.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 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| AR | 200.45.93.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| MX | 189.195.132.134:80 | sdfjhuz.com | tcp |
| AR | 200.45.93.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 134.132.195.189.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 45.93.45.200.in-addr.arpa | udp |
| AR | 200.45.93.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| AR | 200.45.93.45:80 | cajgtus.com | tcp |
| AR | 200.45.93.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 208.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| NL | 23.62.61.72:443 | www.bing.com | tcp |
| 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 |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 72.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
memory/3844-1-0x00000000049A0000-0x0000000004A42000-memory.dmp
memory/3844-2-0x0000000004A50000-0x0000000004B6B000-memory.dmp
memory/392-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/392-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/392-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/392-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\2d6c7953-2aac-4621-b12c-c1439b7d44a4\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
| MD5 | f9139094053186c48b13bc99c9adf7b3 |
| SHA1 | bc35ca5986f7f6bd25fdf532bd6479de79f06335 |
| SHA256 | 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08 |
| SHA512 | 8f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c |
memory/392-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-22-0x0000000000400000-0x0000000000537000-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\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 07a0362933d61640420f606e8a57ebf1 |
| SHA1 | c62122f7da8de4e20bd06cf0069841b1b02d6768 |
| SHA256 | f18619b45ae44974bb3977f4e4e0e898794faff3419f11b0c09b00e1e8b9c7f1 |
| SHA512 | dc63ad4bf570b5761c976843c3cabf11193671fd2a856bf197b335e5523c30c16741ae0f18c6696af11cd30af186445c1ef10629d16822053ff51d17f0901e80 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | b5e47a9c5ad308667083d98698e98423 |
| SHA1 | 1ef2cd5ffa701d79d3d5d6206702fff5b11c7fa6 |
| SHA256 | c73b050b1adabc4c6c109640e3f61ad42725fb390e470d199fdb797111dbd65c |
| SHA512 | b44aafba068c126cb41f35658ac449de225c64cf37662730fe96cd7ab83538828964dfa118f77b404cfece7c8d4f54939f57b7bf01ad9387c2ab29b009bd0a28 |
memory/2796-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2796-37-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-22 19:18
Reported
2024-05-22 19:20
Platform
win11-20240508-en
Max time kernel
146s
Max time network
150s
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-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d59068e2-e584-456c-a971-da328e4088e9\\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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 3264 set thread context of 3520 | N/A | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe |
| PID 1100 set thread context of 1156 | N/A | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe | C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\d59068e2-e584-456c-a971-da328e4088e9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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 | 241.197.17.2.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 |
| CO | 190.146.112.188:80 | cajgtus.com | tcp |
| MX | 187.212.249.248:80 | sdfjhuz.com | tcp |
| CO | 190.146.112.188:80 | cajgtus.com | tcp |
| CO | 190.146.112.188:80 | cajgtus.com | tcp |
| CO | 190.146.112.188:80 | cajgtus.com | tcp |
| CO | 190.146.112.188:80 | cajgtus.com | tcp |
| IE | 52.111.236.22:443 | tcp |
Files
memory/3264-1-0x0000000004A10000-0x0000000004AA3000-memory.dmp
memory/3264-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp
memory/3520-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\d59068e2-e584-456c-a971-da328e4088e9\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
| MD5 | f9139094053186c48b13bc99c9adf7b3 |
| SHA1 | bc35ca5986f7f6bd25fdf532bd6479de79f06335 |
| SHA256 | 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08 |
| SHA512 | 8f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c |
memory/3520-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-22-0x0000000000400000-0x0000000000537000-memory.dmp
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 | db3708e6920e8bce34b8d783b599ae4c |
| SHA1 | 34349d4b5ed7f608164bd187cf4d26ce21a7101a |
| SHA256 | b3e090c7e06f4ed7c7d5a89ba5bb7694b160182a49cab7f3410dc63a5be3a5ff |
| SHA512 | 43651210ff4fa6b62eaf2868defc927c5765014976d937f1264d19207ceb0c5bbf7e39dcbf48720983da262e9b519ae1399442dc37c1e4fb45150ac808ccc15f |
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 | a5d4f088e96547b3dab304f5e0304405 |
| SHA1 | b1ad96e1306891dfab6e6b894b637bc28b8e6b9f |
| SHA256 | 99248eebdb235875f09fd672cf8dda845555b8a53db4705527f9c5549e1f68c4 |
| SHA512 | 4ec954b05a92ed6fc140011964d8e843f5ec825ecb1da428f06f4e7318492a8d1d6658151ba91dbd08b83310cb89b4e121ea24ca5e2b88555650d5a9fd0c4fd5 |
memory/1156-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1156-37-0x0000000000400000-0x0000000000537000-memory.dmp