Analysis Overview
SHA256
4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32
Threat Level: Known bad
The file 4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Vidar
Detected Djvu ransomware
Downloads MZ/PE file
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Modifies file permissions
Checks computer location settings
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Accesses 2FA software files, possible credential harvesting
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Kills process with taskkill
Checks processor information in registry
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-19 04:32
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-19 04:32
Reported
2022-10-19 04:35
Platform
win10v2004-20220812-en
Max time kernel
83s
Max time network
141s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
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Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Reads user/profile data of web browsers
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7bdd658f-9841-4d78-a968-3184a238370b\\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe | N/A |
Checks installed software on the system
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 2988 set thread context of 4296 | N/A | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe |
| PID 3068 set thread context of 500 | N/A | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe | C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe |
| PID 4936 set thread context of 440 | N/A | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe
"C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe"
C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe
"C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\7bdd658f-9841-4d78-a968-3184a238370b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe
"C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe
"C:\Users\Admin\AppData\Local\Temp\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe
"C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe"
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe
"C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe"
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build3.exe
"C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build3.exe"
C:\Windows\SysWOW64\schtasks.exe
/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" 87g/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe" & del C:\PrograData\*.dll & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /im build2.exe /f
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Windows\SysWOW64\schtasks.exe
/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
Network
| Country | Destination | Domain | Proto |
| US | 93.184.220.29:80 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | rgyui.top | udp |
| US | 8.8.8.8:53 | winnlinne.com | udp |
| AR | 186.182.55.44:80 | winnlinne.com | tcp |
| KR | 175.126.109.15:80 | rgyui.top | tcp |
| US | 20.42.65.89:443 | tcp | |
| AR | 186.182.55.44:80 | winnlinne.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 116.202.186.42:80 | 116.202.186.42 | tcp |
| NL | 104.110.191.133:80 | tcp | |
| NL | 104.110.191.133:80 | tcp |
Files
memory/4296-132-0x0000000000000000-mapping.dmp
memory/4296-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4296-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2988-136-0x00000000023B0000-0x00000000024CB000-memory.dmp
memory/2988-135-0x00000000007AE000-0x0000000000840000-memory.dmp
memory/4296-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4296-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4636-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\7bdd658f-9841-4d78-a968-3184a238370b\4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32.exe
| MD5 | f8ae4f55fe0496638cb1bf1eb29bd6e5 |
| SHA1 | 6208c005e689b8d0dbad2e69f399ae594fd53091 |
| SHA256 | 4c25a8711c5861b7effda28f83c9fe5403c57a9ff6224b640faeb0711a150e32 |
| SHA512 | 85f63c8fbb260b792819367523cdf976e95d4fe813b7284a363ca970de68cb17b1e61ccdf2e78677366a12e60896e4201125c92531ac4315c808797b46acf9fe |
memory/3068-141-0x0000000000000000-mapping.dmp
memory/4296-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/500-143-0x0000000000000000-mapping.dmp
memory/3068-146-0x00000000006FD000-0x000000000078F000-memory.dmp
memory/500-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/500-147-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 97ab7ffd65186e85f453dc7c02637528 |
| SHA1 | f22312a6a44613be85c0370878456a965f869a40 |
| SHA256 | 630df8e970cc3b1ad508db713dd8be52e0ac7a5826f3f264a266232f9a1c23ee |
| SHA512 | 37d90c98e72ad55b2cbb938541c81bac1aa9d2b8a7e19f0fbfaa365b49e7bef2d3199f03e46aa9fbf3055f3701d21860820c451065f7e425d39bf86ca606bfb0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | caefcd9947f2ce8c29b650888b0fc1ce |
| SHA1 | c20ed57cc3ad1da595f62a4ac929d8d81a638092 |
| SHA256 | fbccc8693c06d05f3620f72abec04cbe088c9efc898ee01c5b1cff19c288e325 |
| SHA512 | 9de04e7c13e0b3338441207736f59ebc9e8ae959d64079e32c1b42da97526dfdfb53c2f0ee7ad9ae21bdaf885e009e455966d98ad6a5cf310c1635f453b50c5b |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 006c98bc42ac1d15f0ec70e3488783c5 |
| SHA1 | a8c8302826468c903b511e206d6d058e2c3acdaa |
| SHA256 | e24883740fbed2781e4df4e5387cd95c3345ec9944edeeb36babd2c10135fa00 |
| SHA512 | e0caea17f99a18483e0195c5311942c195ef42532f1868bfb5c64b3f6cb72cc0fc58414176a9bfc66452e11d17c2058eafb483a41890f502ec76dc3a6807f2f4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | e23e6d9ca669f648fc8e8f8410abdfcd |
| SHA1 | 8aa651193d90af43e0854559ad1fe22c2ef40692 |
| SHA256 | 1557264ddf655241167ccd8828bac1df7e9e64fd6778551c62426627455e5c60 |
| SHA512 | 9c43f981619f28841a2bec3ebf986978ebf93dff7c9b8db48e925324b3d712ea9fe0322c91da16c629f360484f98886c8a3088d29ed2b634f64906b925d5ae5f |
memory/500-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/500-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4936-154-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/440-157-0x0000000000000000-mapping.dmp
memory/440-158-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4936-160-0x000000000078D000-0x00000000007B9000-memory.dmp
memory/4936-163-0x0000000002210000-0x000000000225F000-memory.dmp
memory/440-162-0x0000000000400000-0x0000000000463000-memory.dmp
memory/440-164-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4904-165-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\531d42ca-64b9-4ba4-835b-de2564bdf3e0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3692-168-0x0000000000000000-mapping.dmp
memory/440-169-0x0000000061E00000-0x0000000061EF3000-memory.dmp
C:\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
C:\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/4824-189-0x0000000000000000-mapping.dmp
memory/3592-190-0x0000000000000000-mapping.dmp
memory/440-191-0x0000000000400000-0x0000000000463000-memory.dmp
memory/428-192-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/928-195-0x0000000000000000-mapping.dmp