Analysis Overview
SHA256
ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2
Threat Level: Known bad
The file ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2 was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Downloads MZ/PE file
Executes dropped EXE
Checks computer location settings
Reads user/profile data of web browsers
Modifies file permissions
Loads dropped DLL
Looks up external IP address via web service
Adds Run key to start application
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Delays execution with timeout.exe
Suspicious use of WriteProcessMemory
Checks processor information in registry
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-11-30 01:50
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-30 01:50
Reported
2022-11-30 01:53
Platform
win10v2004-20220812-en
Max time kernel
124s
Max time network
176s
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\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\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\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.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\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.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\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\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\\2a943253-9511-4500-9f8a-cee737688b71\\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.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 3776 set thread context of 952 | N/A | C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe | C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe |
| PID 1744 set thread context of 792 | N/A | C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe | C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe |
| PID 232 set thread context of 4772 | N/A | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\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\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\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 |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"
C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\2a943253-9511-4500-9f8a-cee737688b71" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe
"C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe"
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe
"C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe"
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build3.exe
"C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\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:\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"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
Network
| Country | Destination | Domain | Proto |
| N/A | 209.197.3.8:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 8.8.8.8:53 | api.2ip.ua | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 72.21.91.29:80 | tcp | |
| N/A | 20.52.64.200:443 | tcp | |
| N/A | 8.8.8.8:53 | 97.97.242.52.in-addr.arpa | udp |
| N/A | 8.8.8.8:53 | api.2ip.ua | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 8.8.8.8:53 | fresherlights.com | udp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 211.119.84.111:80 | uaery.top | tcp |
| N/A | 211.119.84.111:80 | uaery.top | tcp |
| N/A | 211.119.84.111:80 | uaery.top | tcp |
| N/A | 8.8.8.8:53 | t.me | udp |
| N/A | 149.154.167.99:443 | t.me | tcp |
| N/A | 88.198.94.71:80 | 88.198.94.71 | tcp |
Files
memory/952-132-0x0000000000000000-mapping.dmp
memory/952-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/952-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3776-135-0x0000000002284000-0x0000000002316000-memory.dmp
memory/952-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3776-137-0x00000000023F0000-0x000000000250B000-memory.dmp
memory/952-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4216-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\2a943253-9511-4500-9f8a-cee737688b71\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
| MD5 | 739fd46513f15856b2064bd77cd4a915 |
| SHA1 | 3e3e518de800288708975a5f9dd1779322204006 |
| SHA256 | ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2 |
| SHA512 | 90d4c0615e0cc420c17fdb8a85646c8c589deb608753f8644039e57790f1b8866272ebf7e84cac092535998caad6419d9e3a547fad0e69ad6f993141f47974cd |
memory/1744-141-0x0000000000000000-mapping.dmp
memory/952-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/792-143-0x0000000000000000-mapping.dmp
memory/792-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1744-145-0x0000000000793000-0x0000000000825000-memory.dmp
memory/792-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/792-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/232-150-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/4772-153-0x0000000000000000-mapping.dmp
memory/4772-154-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-156-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-158-0x0000000000400000-0x000000000045F000-memory.dmp
memory/232-159-0x00000000020B0000-0x00000000020FB000-memory.dmp
memory/232-157-0x000000000055E000-0x000000000058A000-memory.dmp
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/4772-160-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2412-161-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/5100-164-0x0000000000000000-mapping.dmp
memory/4772-165-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/792-183-0x0000000000400000-0x0000000000537000-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/4772-186-0x0000000000400000-0x000000000045F000-memory.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/3496-189-0x0000000000000000-mapping.dmp
memory/2276-190-0x0000000000000000-mapping.dmp
memory/4772-191-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3592-192-0x0000000000000000-mapping.dmp