Analysis Overview
SHA256
3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4
Threat Level: Known bad
The file 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Modifies file permissions
Checks computer location settings
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 16:34
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-22 16:34
Reported
2024-05-22 16:37
Platform
win11-20240426-en
Max time kernel
147s
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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\79eaf2df-fa92-47ff-899c-aa87d71f5c99\\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.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 4468 set thread context of 2060 | N/A | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe |
| PID 3352 set thread context of 3892 | N/A | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\79eaf2df-fa92-47ff-899c-aa87d71f5c99" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| 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 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| IR | 217.219.131.81:80 | sdfjhuz.com | tcp |
| MX | 201.119.122.3:80 | cajgtus.com | tcp |
| MX | 201.119.122.3:80 | cajgtus.com | tcp |
| MX | 201.119.122.3:80 | cajgtus.com | tcp |
| MX | 201.119.122.3:80 | cajgtus.com | tcp |
| MX | 201.119.122.3:80 | cajgtus.com | tcp |
Files
memory/4468-1-0x0000000004AA0000-0x0000000004B37000-memory.dmp
memory/2060-2-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2060-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4468-4-0x0000000004B40000-0x0000000004C5B000-memory.dmp
memory/2060-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2060-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\79eaf2df-fa92-47ff-899c-aa87d71f5c99\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
| MD5 | c3cdc4206b45b5a62d65c9830bd4b069 |
| SHA1 | d529698f023e3a58c255286fc03fcde61478ea7a |
| SHA256 | 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4 |
| SHA512 | 528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3 |
memory/2060-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-22-0x0000000000400000-0x0000000000537000-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 | d0c1c70a9e787abc31e0577791f569e0 |
| SHA1 | e50b0f424bad8626362fd5a401435a20175b1a18 |
| SHA256 | 8a0f18719084c32f430aca4c0e4998d30e3e54f06603e463b9b2a2cde7049e95 |
| SHA512 | 1cae9562eed2fd4398c43f688ecea741e7528704c8d8fc0441b8e58cb04e9554535aeadd57527686e73964e11297bd208ee4509c2384a2fa7530ccd5091b2801 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | a3aee276e5e93b74c5d8188a08ef4a4f |
| SHA1 | ab48b0c83a99344d42f41c6695c69f1720e7ca14 |
| SHA256 | e26b19683c7d3ccc5176022615d7d21c368c87368e31ef2de5cf3d7cf744677f |
| SHA512 | 98c1d47d9069493aac471057b0cd03d58ff657b3bd3e5cd5f852d667cc42f7e5043c56643a0fdca84ffcf9465bd47e2cd452685f49cddae2029fb2d0ad8e29dc |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
memory/3892-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-37-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 16:34
Reported
2024-05-22 16:37
Platform
win10v2004-20240426-en
Max time kernel
149s
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
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.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-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4cd38d46-e08f-416e-8fd8-450ccba4790d\\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.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 2700 set thread context of 4684 | N/A | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe |
| PID 3716 set thread context of 536 | N/A | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe | C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\4cd38d46-e08f-416e-8fd8-450ccba4790d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
"C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.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 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 137.211.222.173.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 |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| MX | 187.134.55.166:80 | cajgtus.com | tcp |
| AR | 190.224.203.37:80 | sdfjhuz.com | tcp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| MX | 187.134.55.166:80 | cajgtus.com | tcp |
| NL | 23.62.61.160:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 166.55.134.187.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 160.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 37.203.224.190.in-addr.arpa | udp |
| NL | 23.62.61.160:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| MX | 187.134.55.166:80 | cajgtus.com | tcp |
| MX | 187.134.55.166:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| MX | 187.134.55.166:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.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 |
| US | 8.8.8.8:53 | 45.19.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.193.132.51.in-addr.arpa | udp |
Files
memory/2700-1-0x0000000004960000-0x00000000049FB000-memory.dmp
memory/4684-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4684-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4684-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4684-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2700-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp
C:\Users\Admin\AppData\Local\4cd38d46-e08f-416e-8fd8-450ccba4790d\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
| MD5 | c3cdc4206b45b5a62d65c9830bd4b069 |
| SHA1 | d529698f023e3a58c255286fc03fcde61478ea7a |
| SHA256 | 3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4 |
| SHA512 | 528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3 |
memory/4684-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-22-0x0000000000400000-0x0000000000537000-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 | 1be5cc99f62d4382ccb3d51c31a56e8c |
| SHA1 | 1b7d83e4cfa28e5aeeb8fd1655a758e5d9c572a4 |
| SHA256 | 622287a45aed5bf20f25cb3465b5d669c03185cf9156dac00ef31f7f3f0bbddb |
| SHA512 | eaf1e1f81a18900ae46a8ac6015712ac8b219d8f830a2f831687999656c620ea5a956edf242317e68472caebe5981f04736733d5d5106c2429d57114b7f0a9ef |
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 | 430754119d690cd8dcfddbecee676e53 |
| SHA1 | 5c16069d65e6785207ff38f043f6f27295012673 |
| SHA256 | 73ec1aff226676f024f6e468e8312e1e9044ad21f3311eb690c94cc6875494db |
| SHA512 | fb268528951113b87dc59b8b0da32992cdbcc387ee6b395b1d1e1c2be9248ef997fa0158f7c70feef4461a6422ee816967968075f47a54384af6af0cedf8ec56 |
memory/536-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/536-37-0x0000000000400000-0x0000000000537000-memory.dmp