Analysis Overview
SHA256
b5ebf4054d626e0602fd52c351ffba4c7c43f06d61c9e590c4f4bd77347094d7
Threat Level: Known bad
The file ransomware.exe was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Modifies file permissions
Checks computer location settings
Looks up external IP address via web service
Adds Run key to start application
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
2024-01-15 19:09
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-15 19:09
Reported
2024-01-15 19:17
Platform
win7-20231215-en
Max time kernel
400s
Max time network
365s
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\\3e477050-408b-434d-bc33-51a172a72895\\ransomware.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\ransomware.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 2052 set thread context of 2136 | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | C:\Users\Admin\AppData\Local\Temp\ransomware.exe |
| PID 2596 set thread context of 2624 | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | C:\Users\Admin\AppData\Local\Temp\ransomware.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\3e477050-408b-434d-bc33-51a172a72895" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.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 | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| KR | 175.119.10.231:80 | zexeq.com | tcp |
| KR | 175.119.10.231:80 | zexeq.com | tcp |
| KR | 175.119.10.231:80 | zexeq.com | tcp |
| KR | 175.119.10.231:80 | zexeq.com | tcp |
Files
memory/2052-0-0x00000000008E0000-0x0000000000971000-memory.dmp
memory/2052-1-0x00000000008E0000-0x0000000000971000-memory.dmp
memory/2052-2-0x00000000021D0000-0x00000000022EB000-memory.dmp
memory/2136-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2136-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2052-7-0x00000000008E0000-0x0000000000971000-memory.dmp
memory/2136-8-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2136-9-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\3e477050-408b-434d-bc33-51a172a72895\ransomware.exe
| MD5 | d2243b032f9b9226d85de43b5b88480d |
| SHA1 | 7643fc0978122e1862d855af3c2b066c715beacd |
| SHA256 | b5ebf4054d626e0602fd52c351ffba4c7c43f06d61c9e590c4f4bd77347094d7 |
| SHA512 | c2561dbb57fe48a6591a70b3ab48de866013f8d03f5b18356a7304f546b0b852097ff6800f98ab319929089631d59eef00384f6619fb4a271c31b22b54f87b75 |
memory/2136-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2596-28-0x00000000008E0000-0x0000000000971000-memory.dmp
memory/2596-30-0x00000000008E0000-0x0000000000971000-memory.dmp
memory/2624-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-36-0x0000000000400000-0x0000000000537000-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\94308059B57B3142E455B38A6EB92015
| MD5 | 463c9cb85eb0c75fed7a1f75ab33f79f |
| SHA1 | f624d3890cea67b5374dced140001a688387a0ec |
| SHA256 | a4923caa0ee37d6f42beed2ea8f6236517f9de8b04236e063b5b26393033bf88 |
| SHA512 | ad215ad2df5b2646eb34c3f888b3070be5e8b1eca4ebd88bcdb63b599e3adb9c0a5af24e0411275be26abddd588d7c77eef98af6a988d737ae219fa5183a7dc7 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 405efb4b43a4fbeae1f274e4693803a2 |
| SHA1 | be0c61515c3f44dfaef80b7997049b276b0d36ab |
| SHA256 | d080da539c8b1e3fb09dc9f65ff4b9d347e60bc08b26de65adbc4782b398eec0 |
| SHA512 | 20896f035918526b4275dcfb0ec891883e10156cb079fd829d86d96ec11e5940cf876c70e418f23b5d7c54c224b13db30768a830cf5baa66c5397cf3e7c7be2a |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 10bc1463c2326403e6e2a83112554add |
| SHA1 | 554df3e5bd0842d1d5be8331bf765b6f6ccd0afe |
| SHA256 | a2b62727608d9216237a6608a2e995c28d3656b72c06ee0b651878f26df7e8ff |
| SHA512 | 6ba098756dec7fd32d25c208ced685781b78e125d0302af91ef2478793169f7a9d5a34219f5bdd83fcc16c64dbd2bf70e190ad482ddb9d878be32b10110f0d5c |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | b7893834c86539de3d522fd5553431d6 |
| SHA1 | f3f88f5f7fded3240cc92b8167933e486e36cd31 |
| SHA256 | 2440a272a86e772f8f0d2fc777c59a748108e481e4e693dc43b8548e6626312c |
| SHA512 | e3f7d7684b2e6887afbe2598aa2bea2b13a2e2b0a71fdab034802e79b8fa8a02192690df008fae08fb5d0e1796e83123969f0ee42aa2b9b463cb9bce04251dda |
C:\Users\Admin\AppData\Local\Temp\Cab6C2B.tmp
| MD5 | ac05d27423a85adc1622c714f2cb6184 |
| SHA1 | b0fe2b1abddb97837ea0195be70ab2ff14d43198 |
| SHA256 | c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d |
| SHA512 | 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d |
memory/2624-49-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-51-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-52-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-54-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-57-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-56-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2624-58-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-15 19:09
Reported
2024-01-15 19:17
Platform
win10v2004-20231215-en
Max time kernel
333s
Max time network
306s
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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\ransomware.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-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2f96228e-5adf-4b15-aed3-6b676f8a5996\\ransomware.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\ransomware.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 2200 set thread context of 3184 | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | C:\Users\Admin\AppData\Local\Temp\ransomware.exe |
| PID 1796 set thread context of 4524 | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | C:\Users\Admin\AppData\Local\Temp\ransomware.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\ransomware.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\2f96228e-5adf-4b15-aed3-6b676f8a5996" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.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 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 202.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 94.193.125.74.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 19.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| KR | 175.120.254.9:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 9.254.120.175.in-addr.arpa | udp |
| KR | 175.120.254.9:80 | zexeq.com | tcp |
| KR | 175.120.254.9:80 | zexeq.com | tcp |
| KR | 175.120.254.9:80 | zexeq.com | tcp |
| 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 | 140.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 16.234.44.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.173.189.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
Files
memory/2200-1-0x0000000002660000-0x00000000026F3000-memory.dmp
memory/3184-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3184-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3184-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3184-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2200-2-0x0000000002760000-0x000000000287B000-memory.dmp
C:\Users\Admin\AppData\Local\2f96228e-5adf-4b15-aed3-6b676f8a5996\ransomware.exe
| MD5 | d2243b032f9b9226d85de43b5b88480d |
| SHA1 | 7643fc0978122e1862d855af3c2b066c715beacd |
| SHA256 | b5ebf4054d626e0602fd52c351ffba4c7c43f06d61c9e590c4f4bd77347094d7 |
| SHA512 | c2561dbb57fe48a6591a70b3ab48de866013f8d03f5b18356a7304f546b0b852097ff6800f98ab319929089631d59eef00384f6619fb4a271c31b22b54f87b75 |
memory/3184-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-23-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1796-20-0x00000000023D0000-0x0000000002463000-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 | 1c3798465ec75a835bc14a3d54c0d9ec |
| SHA1 | 930e6f5977a018ec83fa16706f4e425af4974688 |
| SHA256 | 218022e77fe10a91bae6fb7aa8a85c5ab1a3d9690d2e16b6dd0fe7810bcf3eae |
| SHA512 | 71cadc4bae416db9077dfcd476e2201d18d0d6eab8698e35406eeda7f9b183ad7451b18a71e3bdf8d791ca0b12a3dd906b677f7129d12e213627af1ada029209 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 10bc1463c2326403e6e2a83112554add |
| SHA1 | 554df3e5bd0842d1d5be8331bf765b6f6ccd0afe |
| SHA256 | a2b62727608d9216237a6608a2e995c28d3656b72c06ee0b651878f26df7e8ff |
| SHA512 | 6ba098756dec7fd32d25c208ced685781b78e125d0302af91ef2478793169f7a9d5a34219f5bdd83fcc16c64dbd2bf70e190ad482ddb9d878be32b10110f0d5c |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 958469b57d79bb365d3f1b45fb5206a1 |
| SHA1 | 6504dd4c96f11d5d100bf81a6a7a6aef85da58e1 |
| SHA256 | cc9542c4faae35ff2ade258cdcaa28c197ae8b31a65ebef50b70d9fa65ec5a2c |
| SHA512 | 7e7be8e7ebf2137829246963ae82c3259cddec6699a11e57c8948acb1b7070cd552ab67755afee8ddc8acda08f7e7b0f7aa9062f08ddd4293b79a08a432ff550 |
memory/4524-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4524-40-0x0000000000400000-0x0000000000537000-memory.dmp