Analysis Overview
SHA256
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458
Threat Level: Known bad
The file d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected 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
Enumerates physical storage devices
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-21 22:02
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-21 22:02
Reported
2024-05-21 22:04
Platform
win10v2004-20240426-en
Max time kernel
141s
Max time network
151s
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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\811d6e58-b508-4e84-bede-57ef9501559b\\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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 3592 set thread context of 2352 | N/A | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe |
| PID 2720 set thread context of 4840 | N/A | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\811d6e58-b508-4e84-bede-57ef9501559b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.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 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| KR | 125.7.253.10:80 | sdfjhuz.com | tcp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 45.231.233.186.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.253.7.125.in-addr.arpa | udp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| NL | 23.62.61.129:443 | www.bing.com | tcp |
| 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 | 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 | 129.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
memory/3592-1-0x0000000002660000-0x00000000026F7000-memory.dmp
memory/3592-2-0x00000000040A0000-0x00000000041BB000-memory.dmp
memory/2352-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2352-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2352-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2352-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\811d6e58-b508-4e84-bede-57ef9501559b\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
| MD5 | a8a057d904ff939a2e74bc340391122e |
| SHA1 | 2f1c5113abda6750f790d1338b15232259b6a85c |
| SHA256 | d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458 |
| SHA512 | bf7fe893d919d454202c7e4f4ac618af616c22db6938175466bd2b0251e9f2fff7f4b9b205e6ee9a28200faba4ad8194f13c82600b41f7225575913121aedd0e |
memory/2352-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-22-0x0000000000400000-0x0000000000537000-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 | a6ffbab822d6f4eff7d1ff98af31c3e0 |
| SHA1 | 7bfe6d56f1e98a44ce5285c0526365eb0f3e9b54 |
| SHA256 | 5ed08c765ec3bb2324fd93a60cd48bc4dd79e52299a5a1325d2e83a01d221ebd |
| SHA512 | 9a266413b6fbee770e0c34052acdbe2bf8e930b53994f3fc05251aaba7f26d3162f7787488510db419c0f7c44d2819050c0eb2ef087664c958cd85d458d43e9c |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a1d955617a4d146e70544d0d9a0390ca |
| SHA1 | 5ffdc4453b23e24a7cb0e634b26864c169f5257b |
| SHA256 | 8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3 |
| SHA512 | 0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | beaaa35e3efc28e1e2095491eed6c4f2 |
| SHA1 | da0106b518257b0fee1af489fb3274d71bd7268a |
| SHA256 | 2c01f986d15b03283c2a19198d736155d6ad1ff22c8edfb88d1fb76742aa7507 |
| SHA512 | 5d63de2cf83c421830f1bcbb1d11696a696fdfc8eca54a51941097e48da6cbd823e5bf9c3f63074698afaec913fac284c665f8d63f05eed740876c4b800b3174 |
memory/4840-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4840-39-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-21 22:02
Reported
2024-05-21 22:04
Platform
win11-20240508-en
Max time kernel
146s
Max time network
148s
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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\53fd561c-eef8-46b2-a745-f1bbef598a30\\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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 3716 set thread context of 480 | N/A | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe |
| PID 4848 set thread context of 328 | N/A | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe | C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\53fd561c-eef8-46b2-a745-f1bbef598a30" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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 | sdfjhuz.com | udp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| SA | 188.52.244.26:80 | sdfjhuz.com | tcp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| BR | 186.233.231.45:80 | cajgtus.com | tcp |
| US | 52.111.229.19:443 | tcp |
Files
memory/3716-1-0x00000000025E0000-0x0000000002679000-memory.dmp
memory/3716-2-0x00000000042B0000-0x00000000043CB000-memory.dmp
memory/480-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/480-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/480-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/480-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\53fd561c-eef8-46b2-a745-f1bbef598a30\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
| MD5 | a8a057d904ff939a2e74bc340391122e |
| SHA1 | 2f1c5113abda6750f790d1338b15232259b6a85c |
| SHA256 | d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458 |
| SHA512 | bf7fe893d919d454202c7e4f4ac618af616c22db6938175466bd2b0251e9f2fff7f4b9b205e6ee9a28200faba4ad8194f13c82600b41f7225575913121aedd0e |
memory/480-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-24-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 0cb7015e93dc42b9f96423fda1e0313f |
| SHA1 | 5e8d7080eb2735474513778f91a0545c79222047 |
| SHA256 | 0a5c1ec0b5fad59a0869f5f68ed31eadf4f62652911cd14936ecd3f788a3d478 |
| SHA512 | c2d156fce982f02b6326f093397dbcc8abd19abc263584cde07893c1233b2b82b13c972f98e45896a2dd2b44cc3d0e9bfbaaac550182b355a01d28fb234458a1 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a1d955617a4d146e70544d0d9a0390ca |
| SHA1 | 5ffdc4453b23e24a7cb0e634b26864c169f5257b |
| SHA256 | 8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3 |
| SHA512 | 0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810 |
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 | 08544f9d19303a8518b07f4ed540937b |
| SHA1 | 3a99f3338df4edee14c8b74e83edd2e17cd16574 |
| SHA256 | 10343036511eb97f78b69390b4047954c947aa5dbb1720510a57b9cc15d65533 |
| SHA512 | 3dc1410432ad3505a485ae410fdf6417b063fa4ead090e048b273ecfb18e28b5f5ad314536e756f7cbf07ce9fe9d8a8a10f0284ca02aa5a0985346b8789379aa |
memory/328-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-39-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-40-0x0000000000400000-0x0000000000537000-memory.dmp
memory/328-41-0x0000000000400000-0x0000000000537000-memory.dmp