Analysis Overview
SHA256
1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9
Threat Level: Known bad
The file 1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Vidar
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
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-11-30 20:30
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-30 20:30
Reported
2022-11-30 20:33
Platform
win10v2004-20220812-en
Max time kernel
151s
Max time network
155s
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\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\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\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.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\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\15bf5d26-cc1a-4011-bca7-c98f10aa29b9\\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.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 892 set thread context of 3948 | N/A | C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe | C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe |
| PID 2548 set thread context of 388 | N/A | C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe | C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe |
| PID 460 set thread context of 4840 | N/A | C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe | C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\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 |
| 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\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe
"C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe"
C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe
"C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\15bf5d26-cc1a-4011-bca7-c98f10aa29b9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe
"C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe
"C:\Users\Admin\AppData\Local\Temp\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe
"C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe"
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe
"C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe"
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build3.exe
"C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\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"
Network
| Country | Destination | Domain | Proto |
| N/A | 8.8.8.8:53 | api.2ip.ua | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 13.69.239.72:443 | tcp | |
| N/A | 8.8.8.8:53 | fresherlights.com | udp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 123.213.233.194:80 | uaery.top | tcp |
| N/A | 190.147.188.50:80 | fresherlights.com | tcp |
| N/A | 190.147.188.50:80 | 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 | 8.8.8.8:53 | steamcommunity.com | udp |
| N/A | 104.74.224.162:443 | steamcommunity.com | tcp |
| N/A | 116.202.6.206:80 | 116.202.6.206 | tcp |
Files
memory/3948-132-0x0000000000000000-mapping.dmp
memory/3948-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/892-135-0x00000000021A7000-0x0000000002239000-memory.dmp
memory/892-136-0x0000000002240000-0x000000000235B000-memory.dmp
memory/3948-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3948-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3948-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1192-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\15bf5d26-cc1a-4011-bca7-c98f10aa29b9\1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9.exe
| MD5 | 063638fe1bf14f54eaf16b97fb5c798d |
| SHA1 | 770583c8c6f1f706fb0e9a97dc0b27b71ac329f7 |
| SHA256 | 1f1497d0c93f4ac3e874c9ff27513f88c1e8747a434b7a1f739afc0033b1ffd9 |
| SHA512 | e9463c7081a1dd2a92b3f637eef3f7c8c96fd1af6386920e15b3c897c6e51fef022d551519aa5468def7e6d308667eae8235ccadccdc1bd50d7e3f5bace410bd |
memory/3948-141-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2548-142-0x0000000000000000-mapping.dmp
memory/3948-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/388-144-0x0000000000000000-mapping.dmp
memory/2548-147-0x0000000002197000-0x0000000002229000-memory.dmp
memory/388-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/388-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/388-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/460-150-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/4840-153-0x0000000000000000-mapping.dmp
memory/4840-154-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4840-156-0x0000000000400000-0x000000000045F000-memory.dmp
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/460-159-0x00000000020C0000-0x000000000210B000-memory.dmp
memory/4840-157-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4840-160-0x0000000000400000-0x000000000045F000-memory.dmp
memory/460-158-0x000000000052D000-0x0000000000559000-memory.dmp
memory/4788-161-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\22cd8a0a-483a-47fd-b46c-867dc8e36062\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3632-164-0x0000000000000000-mapping.dmp
memory/4840-165-0x0000000000400000-0x000000000045F000-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/1232-168-0x0000000000000000-mapping.dmp