Analysis Overview
SHA256
2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20
Threat Level: Known bad
The file 2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20 was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Executes dropped EXE
Downloads MZ/PE file
Checks computer location settings
Modifies file permissions
Looks up external IP address via web service
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-11-29 17:03
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-29 17:03
Reported
2022-11-29 17:07
Platform
win10v2004-20221111-en
Max time kernel
184s
Max time network
223s
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\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.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-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\46abfe7e-4209-4f02-aefb-0df51397c9b5\\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.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 2008 set thread context of 3892 | N/A | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe |
| PID 4344 set thread context of 812 | N/A | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe | C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe |
| PID 3956 set thread context of 2316 | N/A | C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe | C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe
"C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe"
C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe
"C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\46abfe7e-4209-4f02-aefb-0df51397c9b5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe
"C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe
"C:\Users\Admin\AppData\Local\Temp\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe
"C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe"
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build3.exe
"C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\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\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe
"C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 8.248.99.254:80 | tcp | |
| N/A | 20.42.65.88:443 | tcp | |
| N/A | 8.238.20.126:80 | tcp | |
| N/A | 8.238.20.126:80 | tcp | |
| N/A | 8.238.20.126:80 | tcp | |
| N/A | 8.238.20.126:80 | tcp | |
| N/A | 8.238.20.126:80 | tcp | |
| N/A | 104.80.225.205:443 | 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 | 8.8.8.8:53 | 164.2.77.40.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 | uaery.top | udp |
| N/A | 222.236.49.124:80 | uaery.top | tcp |
| N/A | 8.8.8.8:53 | fresherlights.com | udp |
| N/A | 109.98.58.98:80 | fresherlights.com | tcp |
| N/A | 109.98.58.98:80 | fresherlights.com | tcp |
| N/A | 8.8.8.8:53 | t.me | udp |
| N/A | 149.154.167.99:443 | t.me | tcp |
Files
memory/2008-132-0x0000000002145000-0x00000000021D7000-memory.dmp
memory/2008-133-0x0000000002250000-0x000000000236B000-memory.dmp
memory/2008-134-0x0000000002145000-0x00000000021D7000-memory.dmp
memory/3892-135-0x0000000000000000-mapping.dmp
memory/3892-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3892-139-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3548-140-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\46abfe7e-4209-4f02-aefb-0df51397c9b5\2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20.exe
| MD5 | 6cec15b58436d4c968d22bf229cd30c5 |
| SHA1 | 1dc15ac0bc6346ed3ceefe4dea5e806ae65106db |
| SHA256 | 2a11616d165a5572a377ae0592c953142520ae01990242e62511753cb74b1c20 |
| SHA512 | 77f40a509c1a00c31313c395a8e4a2f521439499b1d2fe2f2b867abeab804f4cd3adb478250a7b66aca3dd92488418ccc29d688a0269c9dcce639d2fa3504c1a |
memory/4344-142-0x0000000000000000-mapping.dmp
memory/3892-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/812-144-0x0000000000000000-mapping.dmp
memory/812-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/812-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4344-146-0x0000000002136000-0x00000000021C8000-memory.dmp
memory/812-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3956-151-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/764-154-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4984-157-0x0000000000000000-mapping.dmp
memory/2316-158-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a55cdd71-4556-49d5-a39c-3434b6381049\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/3956-163-0x00000000005E0000-0x000000000062B000-memory.dmp
memory/2316-164-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2316-162-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3956-161-0x00000000006AE000-0x00000000006DA000-memory.dmp
memory/2316-159-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2316-165-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2316-166-0x0000000000400000-0x000000000045F000-memory.dmp