Analysis Overview
SHA256
4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf
Threat Level: Known bad
The file 4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Downloads MZ/PE file
Reads user/profile data of web browsers
Modifies file permissions
Loads dropped DLL
Executes dropped EXE
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Checks processor information in registry
Delays execution with timeout.exe
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-31 12:34
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-31 12:34
Reported
2023-03-31 12:37
Platform
win10-20230220-en
Max time kernel
144s
Max time network
143s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\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-1-5-21-3853465373-1718857667-1861325682-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\95ed93ae-a558-4266-a5d5-da5e9a34211e\\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.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 3664 set thread context of 3676 | N/A | C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe | C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe |
| PID 4448 set thread context of 3520 | N/A | C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe | C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe |
| PID 3064 set thread context of 1304 | N/A | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\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\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\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\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe
"C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe"
C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe
"C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\95ed93ae-a558-4266-a5d5-da5e9a34211e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe
"C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe
"C:\Users\Admin\AppData\Local\Temp\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe
"C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe"
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe
"C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe"
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build3.exe
"C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\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\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
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 | 8.8.8.8:53 | 254.217.0.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 5.233.140.95.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 188.155.64.172.in-addr.arpa | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | uaery.top | udp |
| KR | 211.119.84.111:80 | uaery.top | tcp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| IR | 80.210.25.252:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 111.84.119.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 252.25.210.80.in-addr.arpa | udp |
| IR | 80.210.25.252:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 78.47.168.170:80 | 78.47.168.170 | tcp |
| US | 8.8.8.8:53 | 99.167.154.149.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 170.168.47.78.in-addr.arpa | udp |
| AU | 104.46.162.224:443 | tcp | |
| US | 8.8.8.8:53 | 62.13.109.52.in-addr.arpa | udp |
| US | 93.184.220.29:80 | tcp |
Files
memory/3676-120-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3676-121-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3664-122-0x0000000002270000-0x000000000238B000-memory.dmp
memory/3676-123-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3676-124-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\95ed93ae-a558-4266-a5d5-da5e9a34211e\4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf.exe
| MD5 | c977285ea68304d768274be81e9e3099 |
| SHA1 | 52ed47da482522934aa7b548cfa8b59c7517175e |
| SHA256 | 4ca310d907dc6baee472d3e802672e63a9effebb3e1aa0981cdce3d2a37963bf |
| SHA512 | 7e9e2c380136fd4ffb81d6a3063222992eb467ac0e0c5d1600b61327032778c105c1ce2621b6ea9cfcd6b4f8469e59202be08d3c70c557155103e83b9f00e143 |
memory/3676-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-139-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-140-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 6a3b8331e801f083b403b0857ed8d574 |
| SHA1 | 48d275731f1dbd0630d1ca55a1b05f149a011d1f |
| SHA256 | 98651a2da4a4613bc2a03c4128926fe6b05f1af8a7a21e1fedec75db013706a0 |
| SHA512 | 7527b8857707c8822e4b7f5049ddc9b4c49933e68535690746d84b7f0187a10f36e874719bdb1bf3ba8b035568a7cbafd687b80c4621dc35552d73f7e497071d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 0c7444f5520c770faf4ff91abe56a2f6 |
| SHA1 | 817b3babea3f026d7265c0644276063d46157ff8 |
| SHA256 | c5200c831ba78024a6ea02534ff8d0629a3fd0bdf53e5521fbb352618d691f6a |
| SHA512 | 670635a352585153129811945eb640c322f729f724e2837d0986f5340a596f1e8013f55da9341613e6fabb3e110a188746de200822eb86948e07be1a81e93d12 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | ee7ad9d8f28e0558a94e667206e8a271 |
| SHA1 | b49a079526da92d55f2d1bc66659836c0f90a086 |
| SHA256 | 9eeeef2cbd8192c6586ffa64114ad0c3e8e5ab3a73817e1044895517c6eba712 |
| SHA512 | 0c1596e7b8e54e0cce8139a339c4c34f5f9391ce0b7051673abe7a43f174f292e0d3267b1ce1186247535941b416962b6fe63cb03855ddea254cf09fddad3223 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | dd05c8b996513593592b0904dc783598 |
| SHA1 | 0a949bcdbfb25b72b36d533fd14b9a753fef0409 |
| SHA256 | cf0be68bc4aa309c0a1574ea68cb71e9bbc42c75fc72a463b594a117c9477835 |
| SHA512 | 7bdda86b043f92bba59a23b2bc3ff63b792f912d4500e613932a6ce532c29035c32641328f25960d9c2ad83005cbd4ddc301faefc180c743f618d13624d50a24 |
memory/3520-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-154-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3520-155-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/1304-164-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/1304-166-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3064-167-0x0000000002D20000-0x0000000002D77000-memory.dmp
memory/1304-168-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1304-169-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\94383b16-3690-41c8-a352-e61aaacf2c29\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3520-176-0x0000000000400000-0x0000000000537000-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 |
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/1304-192-0x0000000061E00000-0x0000000061EF3000-memory.dmp
\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/1304-236-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1304-247-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1304-249-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1304-253-0x0000000000400000-0x000000000046C000-memory.dmp