Analysis Overview
SHA256
219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94
Threat Level: Known bad
The file 73c1f532fb36af32c4bf0396e36a046c 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
Unsigned PE
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-25 04:39
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-25 04:39
Reported
2024-01-25 04:41
Platform
win7-20231215-en
Max time kernel
141s
Max time network
122s
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-1-5-21-928733405-3780110381-2966456290-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7c02b0c0-3136-4e77-8233-08a2ca25cc53\\73c1f532fb36af32c4bf0396e36a046c.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.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 2080 set thread context of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe |
| PID 2728 set thread context of 2736 | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\7c02b0c0-3136-4e77-8233-08a2ca25cc53" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.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 | securebiz.org | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
Files
memory/2080-0-0x0000000000290000-0x0000000000322000-memory.dmp
memory/2080-2-0x0000000000290000-0x0000000000322000-memory.dmp
memory/2080-4-0x0000000002150000-0x000000000226B000-memory.dmp
memory/2916-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2916-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2916-7-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2916-8-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\7c02b0c0-3136-4e77-8233-08a2ca25cc53\73c1f532fb36af32c4bf0396e36a046c.exe
| MD5 | 73c1f532fb36af32c4bf0396e36a046c |
| SHA1 | 50d79516412f9f40ce0c65fef0bacc99ed16361f |
| SHA256 | 219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94 |
| SHA512 | 96d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979 |
memory/2728-27-0x0000000000320000-0x00000000003B2000-memory.dmp
memory/2916-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2728-29-0x0000000000320000-0x00000000003B2000-memory.dmp
memory/2728-34-0x0000000000320000-0x00000000003B2000-memory.dmp
memory/2736-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-36-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a50bfa043cd6730f71233e1f1eb82d07 |
| SHA1 | d874c00220588acf9f9d3d12ab32d6da8484b88e |
| SHA256 | 571944c30b02f033d864fe2717f18319aaaeeaa8c3fab6918a4c83cb9fa078f9 |
| SHA512 | e3f81410aa3ea5c4c99410b8f374c76af86ab0a296332a00d040558813f82504ce5ec831adc01ab0f4fbf09b7efc7bef8f8162b8a74d63366220ba89d48ea3d5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 819d2f6d228f94bfebac03edbfa4bc64 |
| SHA1 | 257acbdf2270c5285962d10460a77f422143cc8d |
| SHA256 | e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47 |
| SHA512 | b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67 |
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 | 05bb2f81e36f97aeba09c18b0489ef0d |
| SHA1 | 01ada11b01654267961cc060aa6a909093a1d002 |
| SHA256 | 1e94b2321533b2a646e1486ee4f70b613582b52fd6d31828479092e39a6e7cfd |
| SHA512 | 8c6a57fd1002b29b70e7a41ff0d62e531f24ce611078b4c0db93df6ed0e4087632da9a8b898207281e3f6e0ca3dca5091ae77c5910a54da12e247a81ce2603ad |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
| MD5 | d7ec9dbf92b76cc2c32440d0ec9970cb |
| SHA1 | c5920652a5280b96812d8f2d612cbd6101e281ee |
| SHA256 | 09cfb151bc405c0210541b64f2a205bb38b99bcb8be1106e6c9013b2c8e685a5 |
| SHA512 | e357d4036cf2ae5dad93b24f32c2cd29afbcb824c91642559e1712b18bf00d7dbb3127ca2208d8c412ca1f2aeaa0cb139a4a196f63d5f44637df46f27878efdb |
C:\Users\Admin\AppData\Local\Temp\Cab6E3D.tmp
| MD5 | ac05d27423a85adc1622c714f2cb6184 |
| SHA1 | b0fe2b1abddb97837ea0195be70ab2ff14d43198 |
| SHA256 | c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d |
| SHA512 | 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d |
memory/2736-49-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-50-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-51-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-55-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-58-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-57-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2736-59-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-25 04:39
Reported
2024-01-25 04:41
Platform
win10v2004-20231215-en
Max time kernel
144s
Max time network
149s
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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.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-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7216289e-a0b9-4a19-bc74-ce457b88119a\\73c1f532fb36af32c4bf0396e36a046c.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.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 384 set thread context of 4464 | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe |
| PID 2508 set thread context of 5104 | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\7216289e-a0b9-4a19-bc74-ce457b88119a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe
"C:\Users\Admin\AppData\Local\Temp\73c1f532fb36af32c4bf0396e36a046c.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| 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 | 4.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.201.58.216.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | securebiz.org | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
Files
memory/384-1-0x0000000002780000-0x0000000002814000-memory.dmp
memory/384-2-0x0000000002820000-0x000000000293B000-memory.dmp
memory/4464-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4464-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4464-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4464-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\7216289e-a0b9-4a19-bc74-ce457b88119a\73c1f532fb36af32c4bf0396e36a046c.exe
| MD5 | 73c1f532fb36af32c4bf0396e36a046c |
| SHA1 | 50d79516412f9f40ce0c65fef0bacc99ed16361f |
| SHA256 | 219371ac3b82f569f98a692a680f54aad32a7932e7f94da9d51c6a2738d59c94 |
| SHA512 | 96d97622ae4ab607423fb7c0e9e2ed8a6f39ac4b5933cbde84d91b6a235fc291d8ff0fcf67d4a2dc1d38203432b32a226baf63832ab38c6a9ad02f53be033979 |
memory/4464-16-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2508-18-0x0000000002540000-0x00000000025D5000-memory.dmp
memory/5104-20-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-22-0x0000000000400000-0x0000000000537000-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 | 8564bd6cfd3892d143e10503757a7bd4 |
| SHA1 | 31a33abc47656e7a056e24d4117513332a897292 |
| SHA256 | c67261ea5850439b7421d1a50ba59aae4ddc474fedfb24f0535d94c14405ca27 |
| SHA512 | c85ea1ef86a36f724b2df071ad3ea025216b000be07269c89f4bf2c31a681fc92d4ad818ab8c1a43d58181ec0d2fadb3b6c0d1ac60ff7b5479a098ad9dbdf20d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 819d2f6d228f94bfebac03edbfa4bc64 |
| SHA1 | 257acbdf2270c5285962d10460a77f422143cc8d |
| SHA256 | e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47 |
| SHA512 | b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | c9941d5cf26c534c228d97f0c01de1e9 |
| SHA1 | 4548882d5a3fcaccd82656bff3234e3899dbf64f |
| SHA256 | de166b42230ec87ed09d1bdd5c4626cb2853050483bbf4a9ed094223e7a451a8 |
| SHA512 | d33f57520432ad70381dfe93c129e0429e8af4845164b46aa3e51a58b23dc0b477998e9fb5d8ce6d111f983a63f185fff7573b0b3d878afbc1d35457a77261e1 |
memory/5104-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5104-37-0x0000000000400000-0x0000000000537000-memory.dmp