Analysis Overview
SHA256
4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393
Threat Level: Known bad
The file 4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Checks computer location settings
Reads user/profile data of web browsers
Checks installed software on the system
Accesses 2FA software files, possible credential harvesting
Looks up external IP address via web service
Adds Run key to start application
Accesses cryptocurrency files/wallets, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Delays execution with timeout.exe
Checks processor information in registry
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Kills process with taskkill
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-19 06:25
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-19 06:25
Reported
2022-10-19 06:28
Platform
win10v2004-20220901-en
Max time kernel
135s
Max time network
150s
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\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\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\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.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\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.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\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\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\\0502496a-d3ac-40ae-8701-0bf89fd691e0\\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.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 |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4152 set thread context of 5080 | N/A | C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe | C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe |
| PID 3228 set thread context of 3964 | N/A | C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe | C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe |
| PID 4156 set thread context of 3232 | N/A | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\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\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\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\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe
"C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe"
C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe
"C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\0502496a-d3ac-40ae-8701-0bf89fd691e0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe
"C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe
"C:\Users\Admin\AppData\Local\Temp\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe
"C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe"
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe
"C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe"
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build3.exe
"C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\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 taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\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 | 8.8.8.8:53 | api.2ip.ua | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 93.184.221.240:80 | tcp | |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 20.42.73.25:443 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | rgyui.top | udp |
| US | 8.8.8.8:53 | winnlinne.com | udp |
| KR | 175.120.254.9:80 | rgyui.top | tcp |
| PE | 190.117.75.91:80 | winnlinne.com | tcp |
| PE | 190.117.75.91:80 | 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 |
Files
memory/4152-132-0x000000000089A000-0x000000000092B000-memory.dmp
memory/4152-133-0x0000000002320000-0x000000000243B000-memory.dmp
memory/5080-134-0x0000000000000000-mapping.dmp
memory/5080-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5080-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5080-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5080-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4708-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\0502496a-d3ac-40ae-8701-0bf89fd691e0\4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393.exe
| MD5 | 9dc29f09976fa0fdf8e97f9f3abd31d9 |
| SHA1 | 2f5906cb263ad90e461dd836d3931b0f3a7139ff |
| SHA256 | 4f21800557062521f0357815008783a337065efa0a1d482b8fa4b9b900ccf393 |
| SHA512 | f19fe8da682d6bbcab5ab0e0acbce1f2246692ab3bf4c2ea4a22e930f24c1377e4667645ccb65f82f1232c2b55ccd5adf9a837507606b1dc82b4976eb30a8ec6 |
memory/3228-141-0x0000000000000000-mapping.dmp
memory/5080-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3964-143-0x0000000000000000-mapping.dmp
memory/3964-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3228-146-0x00000000006F0000-0x0000000000781000-memory.dmp
memory/3964-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3964-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4156-149-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/3232-152-0x0000000000000000-mapping.dmp
memory/3232-153-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/3232-156-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4156-158-0x00000000021F0000-0x000000000223F000-memory.dmp
memory/3232-159-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4156-157-0x000000000075D000-0x0000000000789000-memory.dmp
memory/3156-160-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\ccd51ceb-0b40-4f5d-a4a0-c5a3d76d318b\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4388-163-0x0000000000000000-mapping.dmp
memory/3232-164-0x0000000061E00000-0x0000000061EF3000-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/3468-184-0x0000000000000000-mapping.dmp
memory/2788-185-0x0000000000000000-mapping.dmp
memory/3232-186-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4260-187-0x0000000000000000-mapping.dmp
memory/4156-188-0x00000000021F0000-0x000000000223F000-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/3032-191-0x0000000000000000-mapping.dmp