Analysis Overview
SHA256
f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb
Threat Level: Known bad
The file f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
Reads user/profile data of web browsers
Checks computer location settings
Modifies file permissions
Loads dropped DLL
Accesses 2FA software files, possible credential harvesting
Looks up external IP address via web service
Checks installed software on the system
Adds Run key to start application
Accesses cryptocurrency files/wallets, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Checks processor information in registry
Creates scheduled task(s)
Delays execution with timeout.exe
Kills process with taskkill
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-19 12:41
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-19 12:41
Reported
2022-10-19 12:44
Platform
win10v2004-20220901-en
Max time kernel
72s
Max time network
138s
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\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4cab6055-48ad-4bda-9a64-79eaf8be8587\\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.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 3012 set thread context of 452 | N/A | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe |
| PID 4568 set thread context of 308 | N/A | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe | C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe |
| PID 4716 set thread context of 4680 | N/A | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\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\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\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\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe
"C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe"
C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe
"C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\4cab6055-48ad-4bda-9a64-79eaf8be8587" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe
"C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe
"C:\Users\Admin\AppData\Local\Temp\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe
"C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe"
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe
"C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe"
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build3.exe
"C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\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" C/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\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 | 209.197.3.8:80 | tcp | |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 209.197.3.8:80 | 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 |
| PE | 190.117.75.91:80 | rgyui.top | tcp |
| KR | 123.213.233.194:80 | winnlinne.com | tcp |
| KR | 123.213.233.194:80 | 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 |
| US | 20.189.173.15:443 | tcp | |
| FR | 2.18.109.224:443 | tcp |
Files
memory/452-132-0x0000000000000000-mapping.dmp
memory/452-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/452-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3012-135-0x00000000008DC000-0x000000000096E000-memory.dmp
memory/452-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3012-137-0x0000000002350000-0x000000000246B000-memory.dmp
memory/1404-138-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\4cab6055-48ad-4bda-9a64-79eaf8be8587\f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb.exe
| MD5 | b7db5513a841ab02250f75cd0a5ebe73 |
| SHA1 | de1190d0eb77f72d001db8c568e68334d4a446a7 |
| SHA256 | f27b79c4f7d9148d47bdcd992219ee6b2f4d9ceda6c16dd0e5b5cd32397124fb |
| SHA512 | 8babc1b70b0846550c634780ef7399cd3b31797b892bf02ed8e77e27d0b7654785a1f659999d2f7b774833502a6ecaa22f0e94e0183dbe76e048215adcdc2071 |
memory/452-140-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4568-141-0x0000000000000000-mapping.dmp
memory/452-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/308-143-0x0000000000000000-mapping.dmp
memory/4568-147-0x0000000002320000-0x000000000243B000-memory.dmp
memory/308-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4568-146-0x000000000074F000-0x00000000007E1000-memory.dmp
memory/308-145-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 7f8e4bb72bae0996edf07c91bf63c3e2 |
| SHA1 | 97df13ea014ca0be0d8960f3a13429270b75f617 |
| SHA256 | 07c9ddebce170973ba03aba7f0583e359d72a3deddcb5a053f0a8d0bb2acefe7 |
| SHA512 | e5a382a98ea9caf99e8bd57091945177360b1d8c66bacbdfab4f282bba1ba5f1e6470736c4857bd7afa6d0ad1c64201d2a40dd1d1ef9c4c6b68ac5e5d19d9625 |
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\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 006c98bc42ac1d15f0ec70e3488783c5 |
| SHA1 | a8c8302826468c903b511e206d6d058e2c3acdaa |
| SHA256 | e24883740fbed2781e4df4e5387cd95c3345ec9944edeeb36babd2c10135fa00 |
| SHA512 | e0caea17f99a18483e0195c5311942c195ef42532f1868bfb5c64b3f6cb72cc0fc58414176a9bfc66452e11d17c2058eafb483a41890f502ec76dc3a6807f2f4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 85e08cc748582427cd683df1b3634eb9 |
| SHA1 | 9165bb8353da26faa003afb288d858c5c72b69fb |
| SHA256 | 8343eff3a7ea7585a46f0bba39d5d22dc25e6ca4158974b465dbb9e40d33d493 |
| SHA512 | bca84e1256eeef35b0b3b83509369208f9988b22244392e7378bfeeff8062718131aa072ed7d4cb707d42e5e4bf3c250b5ddb4fd7e4b533aa95dc42b641c4e02 |
memory/308-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4716-154-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4680-157-0x0000000000000000-mapping.dmp
memory/4680-158-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4716-161-0x000000000088D000-0x00000000008B9000-memory.dmp
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4680-162-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4716-163-0x0000000002210000-0x000000000225F000-memory.dmp
memory/3012-164-0x0000000002350000-0x000000000246B000-memory.dmp
memory/4680-165-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4680-166-0x0000000061E00000-0x0000000061EF3000-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/1396-186-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\b0a44f4e-02f5-47c9-924c-242d15836785\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/2120-189-0x0000000000000000-mapping.dmp
memory/308-190-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2492-191-0x0000000000000000-mapping.dmp
memory/4308-192-0x0000000000000000-mapping.dmp
memory/4680-193-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4664-194-0x0000000000000000-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/3048-197-0x0000000000000000-mapping.dmp