Analysis Overview
SHA256
a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f
Threat Level: Known bad
The file a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
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 behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-09 09:50
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-09 09:50
Reported
2024-04-09 09:52
Platform
win10v2004-20240226-en
Max time kernel
150s
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
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.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-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\622f7fcd-b718-4e50-bc6a-c98eee1b9528\\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.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 1352 set thread context of 2244 | N/A | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe |
| PID 3628 set thread context of 3148 | N/A | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\622f7fcd-b718-4e50-bc6a-c98eee1b9528" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| 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 | 24.65.21.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 216.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 3.180.250.142.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | sajdfue.com | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | 75.159.190.20.in-addr.arpa | udp |
| IR | 46.100.50.5:80 | sajdfue.com | tcp |
| KR | 211.171.233.126:80 | sdfjhuz.com | tcp |
| IR | 46.100.50.5:80 | sajdfue.com | tcp |
| US | 8.8.8.8:53 | 126.233.171.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 5.50.100.46.in-addr.arpa | udp |
| IR | 46.100.50.5:80 | sajdfue.com | tcp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| IR | 46.100.50.5:80 | sajdfue.com | tcp |
| IR | 46.100.50.5:80 | sajdfue.com | tcp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 40.140.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp |
Files
memory/1352-1-0x0000000004B50000-0x0000000004BE8000-memory.dmp
memory/1352-2-0x0000000004BF0000-0x0000000004D0B000-memory.dmp
memory/2244-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2244-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2244-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2244-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\622f7fcd-b718-4e50-bc6a-c98eee1b9528\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
| MD5 | 3a8a7c0a60f77b76feac5c6f736119b8 |
| SHA1 | 1966c2a7262aa4161958f168c4bc75dee4a291f4 |
| SHA256 | a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f |
| SHA512 | 3b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2 |
memory/2244-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3628-20-0x00000000048C0000-0x000000000495B000-memory.dmp
memory/3148-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-23-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-24-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | fc5408c48a55314c72e200b74330cac4 |
| SHA1 | 7e8889ec3189a40e6078088927bf3612753fa628 |
| SHA256 | 7ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4 |
| SHA512 | 481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77 |
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 | edeaeee2db8bf0c849c0de68474259e4 |
| SHA1 | eb132a6b4a11481c50491978795fe9821f2ef966 |
| SHA256 | c90d48e9112a020d890e99083fdbb3b4dba2d79af2684fc7d032549b2a25731e |
| SHA512 | d04f79278105cf40f350f7b7b70c2cacf710dcdc3f3d73c5105ac6e6249508db136d675371718729996c144fa7577d38b6197e5a5779919e72c71ff53e4ee3b2 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a791dc660eb1a20532715092eec9e1a2 |
| SHA1 | 0d5e484ddf9c2d25e8c856d8447a9adcf113300b |
| SHA256 | 63ad6f14dedb9e1d22bc2a5bff7af908b9ada094d211559d596ac7395dbc0f6d |
| SHA512 | 6c2929b0dd28dd4fe4887df2ac95968deca1cdd91a1002ee1fcc99073f34460c16ff187e4b3f9ecd827d8cc1ea7543d6fa46944130c2c8681d88213d17574c13 |
memory/3148-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3148-39-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-09 09:50
Reported
2024-04-09 09:52
Platform
win11-20240221-en
Max time kernel
143s
Max time network
126s
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-1-5-21-4181651180-3163410697-3990547336-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\19c5fb75-ae0c-41c6-a592-c1c7534e14d3\\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.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 3916 set thread context of 404 | N/A | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe |
| PID 3444 set thread context of 1032 | N/A | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe | C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\19c5fb75-ae0c-41c6-a592-c1c7534e14d3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.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 | 172.67.139.220:443 | api.2ip.ua | tcp |
| RO | 78.97.81.142:80 | sdfjhuz.com | tcp |
| KR | 211.119.84.111:80 | sajdfue.com | tcp |
| KR | 211.119.84.111:80 | sajdfue.com | tcp |
| KR | 211.119.84.111:80 | sajdfue.com | tcp |
| KR | 211.119.84.111:80 | sajdfue.com | tcp |
| KR | 211.119.84.111:80 | sajdfue.com | tcp |
Files
memory/3916-1-0x0000000004BF0000-0x0000000004C8C000-memory.dmp
memory/3916-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp
memory/404-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/404-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/404-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/404-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\19c5fb75-ae0c-41c6-a592-c1c7534e14d3\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
| MD5 | 3a8a7c0a60f77b76feac5c6f736119b8 |
| SHA1 | 1966c2a7262aa4161958f168c4bc75dee4a291f4 |
| SHA256 | a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f |
| SHA512 | 3b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2 |
memory/404-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3444-20-0x0000000002FC0000-0x0000000003053000-memory.dmp
memory/1032-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-23-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-24-0x0000000000400000-0x0000000000537000-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 | b2b7d1020b419952c9d3dad123ba2f15 |
| SHA1 | 93b559545b242b05a97098d811ca77cb763f8449 |
| SHA256 | 2a8caa0fbce62e0a551202430295867e0d4ed58eddfcec534b5c2df5e3795222 |
| SHA512 | abadee643b7927b4da58b71de90ce92968525a37a7d5c6f00c342672513a80bf9048cd636a5707c5ac271fd0efb5896065d155e56e00aafd86789ace7e0d3f94 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | fc5408c48a55314c72e200b74330cac4 |
| SHA1 | 7e8889ec3189a40e6078088927bf3612753fa628 |
| SHA256 | 7ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4 |
| SHA512 | 481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6c4e4c1ba6120e79a921c78fc4420d98 |
| SHA1 | 7393e3394deae984e1d0636e7a84c52eaa030709 |
| SHA256 | 7163eff14947a55ee70fd563d0451bac4ec1c4567f21e1ed0e963c8f0ea20732 |
| SHA512 | cf7b2bf2105068f2ce12a5e25687aec782a14863d38e358b3d539a853cc89fde10775ddf37f9c8fa9bb5a4c4264432915d15b407c065e64fb6547a10b00e8dca |
memory/1032-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1032-39-0x0000000000400000-0x0000000000537000-memory.dmp