Analysis Overview
SHA256
875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9
Threat Level: Known bad
The file 875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9 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
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
2022-11-30 22:54
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-30 22:54
Reported
2022-11-30 22:58
Platform
win10v2004-20221111-en
Max time kernel
213s
Max time network
252s
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\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build3.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.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-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\46c1b46b-5647-4f7e-9f55-dec02a9aa7f4\\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.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 3420 set thread context of 1604 | N/A | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe |
| PID 3236 set thread context of 4476 | N/A | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe | C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe |
| PID 1336 set thread context of 2264 | N/A | C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe | C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\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\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe
"C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe"
C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe
"C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\46c1b46b-5647-4f7e-9f55-dec02a9aa7f4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe
"C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe
"C:\Users\Admin\AppData\Local\Temp\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe
"C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe"
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe
"C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe"
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build3.exe
"C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\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"
Network
| Country | Destination | Domain | Proto |
| N/A | 72.21.91.29:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 104.80.225.205:443 | tcp | |
| N/A | 8.253.208.121:80 | tcp | |
| N/A | 8.253.208.121:80 | tcp | |
| N/A | 188.114.97.0:80 | tcp | |
| N/A | 52.182.143.210:443 | 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 | 20.54.89.15:443 | tcp | |
| N/A | 8.8.8.8:53 | 164.2.77.40.in-addr.arpa | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 8.8.8.8:53 | d.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.5.0.8.0.0.3.0.1.3.0.6.2.ip6.arpa | udp |
| N/A | 8.8.8.8:53 | crl.usertrust.com | udp |
| N/A | 172.64.155.188:80 | crl.usertrust.com | tcp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 8.8.8.8:53 | fresherlights.com | udp |
| N/A | 187.212.179.75:80 | uaery.top | tcp |
| N/A | 211.53.230.67:80 | fresherlights.com | tcp |
| N/A | 211.53.230.67:80 | fresherlights.com | tcp |
| N/A | 8.8.8.8:53 | t.me | udp |
| N/A | 149.154.167.99:443 | t.me | tcp |
| N/A | 116.203.0.170:80 | 116.203.0.170 | tcp |
Files
memory/3420-132-0x000000000218B000-0x000000000221D000-memory.dmp
memory/1604-133-0x0000000000000000-mapping.dmp
memory/1604-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1604-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3420-136-0x0000000002220000-0x000000000233B000-memory.dmp
memory/3420-137-0x000000000218B000-0x000000000221D000-memory.dmp
memory/1604-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1604-139-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4880-140-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\46c1b46b-5647-4f7e-9f55-dec02a9aa7f4\875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9.exe
| MD5 | 9f86d39cef8f2d55ee153628c599f125 |
| SHA1 | ffcca079744b576dec190e17f8a96f6283875729 |
| SHA256 | 875eb3cbcaa92db668777dc133f67fe99d988a96668e12b04583633553a670b9 |
| SHA512 | 204d27e878e9a7509b4f40ab55fd6bca1fbe989f9b85a21429008f48cf57c8c1730387667e5affaf3a48c25db69c3f0aabf5d9d4f1d963e39343cfb1cf884b72 |
memory/3236-142-0x0000000000000000-mapping.dmp
memory/1604-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4476-144-0x0000000000000000-mapping.dmp
memory/3236-146-0x0000000002145000-0x00000000021D7000-memory.dmp
memory/4476-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4476-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4476-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1336-151-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/2264-154-0x0000000000000000-mapping.dmp
memory/2264-155-0x0000000000400000-0x000000000045F000-memory.dmp
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/1336-160-0x00000000005D0000-0x000000000061B000-memory.dmp
memory/2264-159-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2264-158-0x0000000000400000-0x000000000045F000-memory.dmp
memory/1336-157-0x000000000068E000-0x00000000006BA000-memory.dmp
memory/2264-161-0x0000000000400000-0x000000000045F000-memory.dmp
memory/1864-162-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\f06bf8ac-d9b1-420f-a6cc-88dccaee6418\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4396-165-0x0000000000000000-mapping.dmp
memory/2264-166-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2264-167-0x0000000061E00000-0x0000000061EF3000-memory.dmp