Analysis Overview
SHA256
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d
Threat Level: Known bad
The file f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected 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
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-21 17:11
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-21 17:11
Reported
2024-05-21 17:14
Platform
win10v2004-20240508-en
Max time kernel
143s
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
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b\\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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 4788 set thread context of 1328 | N/A | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe |
| PID 5004 set thread context of 3748 | N/A | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| IQ | 195.85.218.100:80 | cajgtus.com | tcp |
| MD | 188.237.2.116:80 | sdfjhuz.com | tcp |
| IQ | 195.85.218.100:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 116.2.237.188.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 100.218.85.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| NL | 23.62.61.129:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 129.61.62.23.in-addr.arpa | udp |
| IQ | 195.85.218.100:80 | cajgtus.com | tcp |
| IQ | 195.85.218.100:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| IQ | 195.85.218.100:80 | cajgtus.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 | 31.251.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.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 | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
Files
memory/4788-1-0x00000000025C0000-0x0000000002655000-memory.dmp
memory/4788-2-0x0000000004140000-0x000000000425B000-memory.dmp
memory/1328-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1328-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1328-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
| MD5 | 3272f4177ebd454a5d1ba9279f20e1a1 |
| SHA1 | fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0 |
| SHA256 | f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d |
| SHA512 | 6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047 |
memory/1328-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 11f278ecfadd681ed364f1d2378e1c12 |
| SHA1 | 86ca6ba60845cb97e850c3849028735b799607d7 |
| SHA256 | 4f9ab2929062209a0fef639022b39e69aa46473633ca68853a91340f0dd6e5fd |
| SHA512 | d4ba5faf3ca38d8a709f0fdb2a2657732a14be4f6107a7725b3e3d13b1d8f1d6d4602c72ff70ba200f5f2a49b76caea59f28cc29a008e2de7ca36ef017b54aaa |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | df80f9ba75076db634761b6132e0d4e3 |
| SHA1 | 07983946fb660752c7cccb2ef82d01ec4c9ecc5d |
| SHA256 | d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99 |
| SHA512 | 4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 7ab7f71ca3b66c963f16ced32610976d |
| SHA1 | c955b825cf828d5dfbafcebd99e6dcaea67a1046 |
| SHA256 | 519300bbc8fa37d9edd179022cbe6060cf5d61851d041699f20f9623d1a6e542 |
| SHA512 | de1088561d7df6a6806b230fad1ba6472c16b9ef2dce528fe31c287cba5074f2d8a2ee2606b7282cbb5f12734a49a40de17e694ad5ff817dca722540e9b44167 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
memory/3748-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3748-37-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-21 17:11
Reported
2024-05-21 17:14
Platform
win11-20240508-en
Max time kernel
146s
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-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fb1166c3-a335-41fc-80ea-b1feec2182db\\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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 4968 set thread context of 1956 | N/A | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe |
| PID 2960 set thread context of 1132 | N/A | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe | C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\fb1166c3-a335-41fc-80ea-b1feec2182db" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 188.114.96.2:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 2.96.114.188.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 188.114.96.2:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| IR | 217.219.131.81:80 | cajgtus.com | tcp |
| CO | 190.156.239.49:80 | sdfjhuz.com | tcp |
| IR | 217.219.131.81:80 | cajgtus.com | tcp |
| IR | 217.219.131.81:80 | cajgtus.com | tcp |
| IR | 217.219.131.81:80 | cajgtus.com | tcp |
| IR | 217.219.131.81:80 | cajgtus.com | tcp |
Files
memory/4968-1-0x0000000002600000-0x000000000269C000-memory.dmp
memory/4968-2-0x0000000004240000-0x000000000435B000-memory.dmp
memory/1956-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1956-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1956-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1956-3-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\fb1166c3-a335-41fc-80ea-b1feec2182db\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
| MD5 | 3272f4177ebd454a5d1ba9279f20e1a1 |
| SHA1 | fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0 |
| SHA256 | f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d |
| SHA512 | 6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047 |
memory/1956-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | df80f9ba75076db634761b6132e0d4e3 |
| SHA1 | 07983946fb660752c7cccb2ef82d01ec4c9ecc5d |
| SHA256 | d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99 |
| SHA512 | 4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a |
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 | 33d61bf27d159382e90fc80609751d58 |
| SHA1 | f0efae71dff265d65bf8fd2c0fd6a7f30fc4dbaf |
| SHA256 | ae2620a3e9e06d8f62065a0273c7e96de1e81a0f7f34b989e14da71e369994c4 |
| SHA512 | 195bcbf2ae0f288da3edd38494e65f1c7b9d3817dba493502d23ddde154ba12e350bea9e36f82dbd381214081c6089d9717162c4bb8a0634ea25b191c578b73d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | ca32f50673d9306664e2006e86edac38 |
| SHA1 | 9c2988bf138b9999918d70fd27c2005995ef1673 |
| SHA256 | 3a5af594e75d2ba5a44b6eb58628505abab2097e699b68edd128a15d2df49e1a |
| SHA512 | ed675691d86da8692da2749ba77ceb2bb358273c2b5956ef14c30d5f773741aec65043fe642186d6473b779d0fba3a0c3eec00fecaecd10893d2f0fe8bfcd901 |
memory/1132-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-37-0x0000000000400000-0x0000000000537000-memory.dmp