Analysis Overview
SHA256
bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d
Threat Level: Known bad
The file bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
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 use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-09 09:20
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-09 09:20
Reported
2024-04-09 09:23
Platform
win10v2004-20240226-en
Max time kernel
147s
Max time network
152s
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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.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-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f8a8f0b9-7ca5-4685-8343-4ed8e8ba22b9\\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.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 3004 set thread context of 1748 | N/A | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe |
| PID 4968 set thread context of 2136 | N/A | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f8a8f0b9-7ca5-4685-8343-4ed8e8ba22b9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.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 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 3.180.250.142.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | sajdfue.com | udp |
| IR | 93.118.137.82:80 | sdfjhuz.com | tcp |
| CO | 190.156.239.49:80 | sajdfue.com | tcp |
| CO | 190.156.239.49:80 | sajdfue.com | tcp |
| US | 8.8.8.8:53 | 49.239.156.190.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.137.118.93.in-addr.arpa | udp |
| CO | 190.156.239.49:80 | sajdfue.com | tcp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| CO | 190.156.239.49:80 | sajdfue.com | tcp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| CO | 190.156.239.49:80 | sajdfue.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 | 24.139.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 216.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 63.141.182.52.in-addr.arpa | udp |
Files
memory/3004-1-0x0000000004AF0000-0x0000000004B84000-memory.dmp
memory/3004-2-0x0000000004B90000-0x0000000004CAB000-memory.dmp
memory/1748-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1748-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1748-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1748-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\f8a8f0b9-7ca5-4685-8343-4ed8e8ba22b9\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
| MD5 | 3673d9d72e9a1c772c4893f20f87d106 |
| SHA1 | 9b345d65d056afb21352dd1ae43c18bae3bcd7c0 |
| SHA256 | bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d |
| SHA512 | 320e6945b6eb7cb37e8a4c4dc307687993765c07faa7c225ed0cfa8903500f7ccd8c7e6a672104bf7749858f35ffd4b744532bd88da4208c4210f55f9ab0a509 |
memory/1748-18-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4968-20-0x00000000049A0000-0x0000000004A3C000-memory.dmp
memory/2136-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-23-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-24-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | fc5408c48a55314c72e200b74330cac4 |
| SHA1 | 7e8889ec3189a40e6078088927bf3612753fa628 |
| SHA256 | 7ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4 |
| SHA512 | 481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 68942175603ad5a678766b0531422f70 |
| SHA1 | 8fb740b104b1b6e1653fd0b54bebeba3bfb740dc |
| SHA256 | eccc37e09f5aab5322800e2621852e8ce1762a317e60aa598fcd11c746bedd29 |
| SHA512 | da13dd40bc634cb3f5409b44b2c27bdeb7f011757cc794cd554f5bb4547a1f9aac1821c2582fe45aa0e3b2a3491f7dca1b8fb5715a6145764b55285257d52589 |
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 | 8b04dc782cb59efccd211451ce19fd07 |
| SHA1 | 9a16734d3eb4249b38b965624d65d080555af1d3 |
| SHA256 | cbad0e5ccd5796c459f7cae553d0bed4caa0da2cbd4eb864c3952897d0a6aa46 |
| SHA512 | ea70c446bbd45e603dec6837872f38bd76c7abff2a9893cf8212edac04d1da028961c05d69d91d980b1134fdf1880dfeaffebb3743ad24c340d91f50909d59d2 |
memory/2136-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-39-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-09 09:20
Reported
2024-04-09 09:23
Platform
win11-20240214-en
Max time kernel
142s
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-1-5-21-2567984660-2719943099-2683635618-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\972c59d6-0672-4da8-843e-dccb60b16645\\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.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 1740 set thread context of 2800 | N/A | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe |
| PID 2092 set thread context of 4104 | N/A | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe | C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\972c59d6-0672-4da8-843e-dccb60b16645" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.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 | 3.180.250.142.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| PH | 222.127.60.34:80 | sdfjhuz.com | tcp |
| MX | 189.134.97.255:80 | sajdfue.com | tcp |
| MX | 189.134.97.255:80 | sajdfue.com | tcp |
| MX | 189.134.97.255:80 | sajdfue.com | tcp |
| MX | 189.134.97.255:80 | sajdfue.com | tcp |
| MX | 189.134.97.255:80 | sajdfue.com | tcp |
Files
memory/1740-1-0x0000000004AA0000-0x0000000004B3E000-memory.dmp
memory/1740-2-0x0000000004B40000-0x0000000004C5B000-memory.dmp
memory/2800-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2800-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2800-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2800-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\972c59d6-0672-4da8-843e-dccb60b16645\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
| MD5 | 3673d9d72e9a1c772c4893f20f87d106 |
| SHA1 | 9b345d65d056afb21352dd1ae43c18bae3bcd7c0 |
| SHA256 | bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d |
| SHA512 | 320e6945b6eb7cb37e8a4c4dc307687993765c07faa7c225ed0cfa8903500f7ccd8c7e6a672104bf7749858f35ffd4b744532bd88da4208c4210f55f9ab0a509 |
memory/2800-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-20-0x0000000002FF0000-0x000000000308C000-memory.dmp
memory/4104-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-23-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-24-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | fc5408c48a55314c72e200b74330cac4 |
| SHA1 | 7e8889ec3189a40e6078088927bf3612753fa628 |
| SHA256 | 7ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4 |
| SHA512 | 481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a8a6decac88caae3b60459b14c01e907 |
| SHA1 | daeb406b57bb1ad2d0367fb12a02b5ddc54dae4b |
| SHA256 | e5bb1089eb3791d14638e235a0dcc91afa1c7a3d5350b4ea0b5f75d17c2dc5af |
| SHA512 | 5cbb9ab87eb60c3dcdacf621bd57b8e0d7e5eb588934d2b61e2a95e042928cd3125f243f4347ebaf13696fb2a9c0da33c909383e992af71d36ed2828cfab51ad |
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 | 7965b46f6938502199f3fa3b6316c862 |
| SHA1 | cd6c705029b6dcb446d555a21bf0b6d1bff32123 |
| SHA256 | c2f8e09f97308014b56dfdad627b1ac2c11e89c98941ea216bcaf91887b02bc5 |
| SHA512 | c431864e2cc8b9499a0b7587ddc24ea5360b31c1e8f7ac56f0de3807b6bebf3dfa6862d3421164b355f5480b3f4bebbef63220dbc9e823011177f754edf6f820 |
memory/4104-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4104-39-0x0000000000400000-0x0000000000537000-memory.dmp