Analysis Overview
SHA256
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166
Threat Level: Known bad
The file c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166 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
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 04:41
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 04:41
Reported
2024-05-22 04:43
Platform
win10v2004-20240508-en
Max time kernel
141s
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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1\\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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 3896 set thread context of 4020 | N/A | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe |
| PID 1232 set thread context of 4136 | N/A | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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 | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| US | 8.8.8.8:53 | 24.65.21.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.159.190.20.in-addr.arpa | udp |
| KR | 211.171.233.129:80 | sdfjhuz.com | tcp |
| IR | 46.100.50.5:80 | cajgtus.com | tcp |
| IR | 46.100.50.5:80 | cajgtus.com | tcp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 5.50.100.46.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 129.233.171.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| IR | 46.100.50.5:80 | cajgtus.com | tcp |
| IR | 46.100.50.5:80 | cajgtus.com | tcp |
| IR | 46.100.50.5:80 | cajgtus.com | 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 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.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 | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
Files
memory/3896-1-0x00000000024E0000-0x0000000002577000-memory.dmp
memory/3896-2-0x00000000040B0000-0x00000000041CB000-memory.dmp
memory/4020-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4020-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4020-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4020-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\fe7f5bbf-5988-447d-a7ea-6487b7b4efb1\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
| MD5 | 5fbc11643953158e26571772a8edc74a |
| SHA1 | 94fedc97feb2d2df2745c6fcd5501a1a114a0d75 |
| SHA256 | c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166 |
| SHA512 | 6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988 |
memory/4020-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | e737f752779b7dd3ef534920a0625919 |
| SHA1 | 665fad5cc4fefbfa4b4b273b986bb45b272d1f04 |
| SHA256 | 9b82a61fd764a96063beebe2bc4317d97939ee3b62dd9d97dbc1b7b4d159cabf |
| SHA512 | d676e4011e32ab1e34acf670eacd5546ddf7efb5e80fd2b894ad305559715eb7764e681c4ca3981ed61df917300a6fca2c62e70b860b3629d25cc47f12a2fed0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | cb35bd9d6c5a4fd50a9263018bbd9784 |
| SHA1 | efec24f93d2af7bd01969c36870ebc928fa6c790 |
| SHA256 | be648ee93df285417e494e28c01e3ab8f3d043845f4d3b397dfd137d187ed612 |
| SHA512 | ac26182fb167458da4b465b118720470859e8028db8d3d71ddbe0c5be0e46b9178c5f7ccb8b1252c38754e27da1af546f8d2f6e32e1bfcbeac0d510aa831bf11 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 531039475b8e1ce89504b3b255528146 |
| SHA1 | 85ce619f07fea4a403d3eda9637ec2a44f035d87 |
| SHA256 | c046a73a2d1459f0f44c7a7abc78b375d497c56d2ac567fc7c08bf5240851d8b |
| SHA512 | 9dd0df91f6508468e530431ed9851e506ec1aeb157a87fac56376c74ce4fba13c8f9b2c986b4fb6042dbab74f34a83ef570fb30e072d0ed64541a60ae7e22cb0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
memory/4136-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-22 04:41
Reported
2024-05-22 04:43
Platform
win11-20240426-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
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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1c9b8368-48de-4dac-85c9-b0665178a4c7\\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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 3388 set thread context of 3376 | N/A | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe |
| PID 1748 set thread context of 2884 | N/A | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe | C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\1c9b8368-48de-4dac-85c9-b0665178a4c7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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 | 67.169.217.172.in-addr.arpa | udp |
| BR | 191.186.138.218:80 | cajgtus.com | tcp |
| CO | 186.145.236.93:80 | sdfjhuz.com | tcp |
| BR | 191.186.138.218:80 | cajgtus.com | tcp |
| BR | 191.186.138.218:80 | cajgtus.com | tcp |
| BR | 191.186.138.218:80 | cajgtus.com | tcp |
| BR | 191.186.138.218:80 | cajgtus.com | tcp |
| NL | 52.111.243.29:443 | tcp |
Files
memory/3388-1-0x0000000002700000-0x00000000027A1000-memory.dmp
memory/3388-2-0x00000000041E0000-0x00000000042FB000-memory.dmp
memory/3376-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3376-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3376-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3376-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\1c9b8368-48de-4dac-85c9-b0665178a4c7\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
| MD5 | 5fbc11643953158e26571772a8edc74a |
| SHA1 | 94fedc97feb2d2df2745c6fcd5501a1a114a0d75 |
| SHA256 | c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166 |
| SHA512 | 6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988 |
memory/3376-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | cb35bd9d6c5a4fd50a9263018bbd9784 |
| SHA1 | efec24f93d2af7bd01969c36870ebc928fa6c790 |
| SHA256 | be648ee93df285417e494e28c01e3ab8f3d043845f4d3b397dfd137d187ed612 |
| SHA512 | ac26182fb167458da4b465b118720470859e8028db8d3d71ddbe0c5be0e46b9178c5f7ccb8b1252c38754e27da1af546f8d2f6e32e1bfcbeac0d510aa831bf11 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a9a8c36c44644f018a47c8bdae5a7cd3 |
| SHA1 | 1e74376993a8a56021777d3055d00e6aa388ceac |
| SHA256 | febc399223fad9e1b6ed690ebe475a0be6ce6a81ec33cc20309423172dd699f3 |
| SHA512 | c0e2840105b97c63876eac1a89bd87de27ae5bf72858bd6036af11389b6b3e82c7834de57f3f6fab562a213c620e97c8158dce0018ee1b8a0edf6243ebe34da4 |
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 | 58af5cfaa624d78612e5fbddf1e1d664 |
| SHA1 | 785024b87055ca6338b4280ba27bf2a1caa1ac07 |
| SHA256 | 14be27f4bf40b10eba86e835e4faf74d57a578a68dd82822697dd8c2a72f7d1b |
| SHA512 | 8f024b4e799e5a9b896aba982a5bd07b159e72529e7c640836c7d8fe4a6d8561bc0148941c6596f3a15c4b8c496083133f32ada39fead80080934d5cf64634b9 |
memory/2884-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2884-37-0x0000000000400000-0x0000000000537000-memory.dmp