Analysis Overview
SHA256
f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c
Threat Level: Known bad
The file f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c 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
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-31 15:39
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-31 15:39
Reported
2023-03-31 15:46
Platform
win10v2004-20230221-en
Max time kernel
303s
Max time network
369s
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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.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-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\89734b94-1474-48f1-b839-966ca176633e\\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.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 |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 324 set thread context of 2496 | N/A | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe |
Enumerates physical storage devices
Modifies system certificate store
| Description | Indicator | Process | Target |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
"C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe"
C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
"C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\89734b94-1474-48f1-b839-966ca176633e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
"C:\Users\Admin\AppData\Local\Temp\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 209.197.3.8:80 | tcp | |
| US | 209.197.3.8:80 | tcp | |
| US | 52.182.143.208:443 | tcp | |
| US | 52.182.143.210:443 | tcp | |
| US | 204.79.197.200:443 | tcp | |
| US | 8.8.8.8:53 | 233.141.123.20.in-addr.arpa | udp |
| US | 209.197.3.8:80 | tcp | |
| NL | 173.223.113.164:443 | tcp | |
| NL | 173.223.113.131:80 | tcp | |
| US | 204.79.197.203:80 | tcp | |
| US | 8.8.8.8:53 | 254.155.27.67.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 254.217.0.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 7.173.189.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | crl.comodoca.com | udp |
| US | 172.64.155.188:80 | crl.comodoca.com | tcp |
| US | 8.8.8.8:53 | 2.36.159.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 188.155.64.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 126.22.238.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 76.38.195.152.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.18.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
Files
memory/2496-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/324-136-0x0000000002740000-0x000000000285B000-memory.dmp
memory/2496-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-140-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-154-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\89734b94-1474-48f1-b839-966ca176633e\f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c.exe
| MD5 | e5a01ac0fdc56bedef4e05c92a6d0f18 |
| SHA1 | 59717771b834d04bf8b90112623b15774b69549d |
| SHA256 | f17d58b44d1c50e97145890d241c8e5b08fc9d53318b8d98f5c83801ff0fca4c |
| SHA512 | d0ee6acff372030d7484af8445ad21613c4d42fee69c1dfc1d0fa9dcfea31fef2d7c757b46823f32f658d5eebb5c95c8015dc8a967b9a048413fbb493e2b4034 |
memory/2496-157-0x0000000000400000-0x0000000000537000-memory.dmp