Analysis Overview
SHA256
56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
Threat Level: Known bad
The file file.exe was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
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
Enumerates physical storage devices
Unsigned PE
Program crash
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-26 08:54
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-26 08:54
Reported
2024-01-26 08:56
Platform
win10v2004-20231215-en
Max time kernel
86s
Max time network
131s
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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\file.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-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f0a74db3-6da6-44d6-b434-19346e459dc6\\file.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\file.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 |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1320 set thread context of 1068 | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | C:\Users\Admin\AppData\Local\Temp\file.exe |
| PID 8 set thread context of 4720 | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | C:\Users\Admin\AppData\Local\Temp\file.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\file.exe |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f0a74db3-6da6-44d6-b434-19346e459dc6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4720 -ip 4720
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 568
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 188.114.97.2:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 2.97.114.188.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.204.58.216.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.143.109.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 175.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
Files
memory/1320-0-0x0000000004A40000-0x0000000004B5B000-memory.dmp
memory/1068-1-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1068-2-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1068-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1068-4-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\f0a74db3-6da6-44d6-b434-19346e459dc6\file.exe
| MD5 | 87ba288f14fbf826d4cf061d9f8e72ed |
| SHA1 | ec1f877e40b5e8917953e54eb51834a15335aa6e |
| SHA256 | 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63 |
| SHA512 | 200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95 |
memory/1068-15-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4720-18-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4720-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4720-21-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-26 08:54
Reported
2024-01-26 08:56
Platform
win7-20231215-en
Max time kernel
143s
Max time network
122s
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 |
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| 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-1-5-21-1268429524-3929314613-1992311491-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\de94aea9-7fce-48c6-9e75-ef55422fb8c9\\file.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\file.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 1700 set thread context of 2356 | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | C:\Users\Admin\AppData\Local\Temp\file.exe |
| PID 2592 set thread context of 2584 | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | C:\Users\Admin\AppData\Local\Temp\file.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\file.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\de94aea9-7fce-48c6-9e75-ef55422fb8c9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.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 | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | habrafa.com | udp |
| KR | 175.120.254.9:80 | habrafa.com | tcp |
Files
memory/1700-1-0x0000000004450000-0x000000000456B000-memory.dmp
memory/2356-0-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2356-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2356-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2356-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\de94aea9-7fce-48c6-9e75-ef55422fb8c9\file.exe
| MD5 | 87ba288f14fbf826d4cf061d9f8e72ed |
| SHA1 | ec1f877e40b5e8917953e54eb51834a15335aa6e |
| SHA256 | 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63 |
| SHA512 | 200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95 |
memory/2356-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-31-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Cab61CF.tmp
| MD5 | ac05d27423a85adc1622c714f2cb6184 |
| SHA1 | b0fe2b1abddb97837ea0195be70ab2ff14d43198 |
| SHA256 | c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d |
| SHA512 | 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
| MD5 | 968c6c6c57c749ecb7ad1b36e59a8a74 |
| SHA1 | e293417d4a27a42c8ccf22aa30cab9afc2d12989 |
| SHA256 | 9bb700979324cb395a381d2b0790269e51833450511f163c2ac5d0e126ccbf80 |
| SHA512 | 39844f5f429ddaaaa4d2b78b0a066714165a0b29e8c5a7235516d77ed3931ae473d947ff168bee98e84f2e90a1e1676971ee4049bae942bd79d213d1d83d2be5 |
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 | 4eff330e67edfacd75cde8172f830ad4 |
| SHA1 | eb63a2ff81856f8fc166e83b0039ac0a56e71a3b |
| SHA256 | 2f2c67460cb660530fd871eb228a1a0a3b90b2648788e48c553716565da0ab6d |
| SHA512 | a8263ea8e59969aa0a0fa621fa68a83df3b2695c87ebccfa196c04302f2638828a1d35e7143555a68316b0b4f4b0c55a325906983536602675482fbe360b9641 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 73ce21ff1fb2989f6350ace9274ae9b5 |
| SHA1 | 7db6c387eb8351f3e8e361d10224711c3477821e |
| SHA256 | d7005273bab949c42fcc73eac7820c4c5f08df1e9095020cdb0e17fc9e282d50 |
| SHA512 | a43767a55a559a8bf51d5dcb9bc378167f63e15f571b6be35903048570d036fed2a3f6a37c91f469ee9808d245cdd875b9dad38556e6bf97258a82c7071aeab3 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 5236d71f903b274c96f7942c93d85bb9 |
| SHA1 | c54fe3cd67055a4ea66ae981b17e5b0c354c6ff9 |
| SHA256 | 6902c0adc96f876845598073a6e09cf333b6a16f6f1eb83dd449d3b311eb09ac |
| SHA512 | a1bbf0eaf4ac36bd6854e64a02ec895bb1319d986ea00ec2ef658ecabbc660344fd620c8ce3aff946d85b0cd685f6847bbc37d54248a7d06c50c77aa171fe51b |
memory/2584-44-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-46-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-50-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-53-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-52-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2584-54-0x0000000000400000-0x0000000000537000-memory.dmp