Analysis Overview
SHA256
fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884
Threat Level: Known bad
The file fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884 was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Downloads MZ/PE file
Modifies file permissions
Executes dropped EXE
Reads user/profile data of web browsers
Loads dropped DLL
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Adds Run key to start application
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Checks processor information in registry
Delays execution with timeout.exe
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-31 12:35
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-31 12:35
Reported
2023-03-31 12:38
Platform
win10-20230220-en
Max time kernel
148s
Max time network
127s
Command Line
Signatures
Detected Djvu ransomware
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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\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\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\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\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-1-5-21-640001698-3754512395-3275565439-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b9574431-2006-4bd5-a64d-2eaa57a6b161\\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.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 2040 set thread context of 4396 | N/A | C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe | C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe |
| PID 2780 set thread context of 4472 | N/A | C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe | C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe |
| PID 2972 set thread context of 1904 | N/A | C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe | C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\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\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\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\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe
"C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe"
C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe
"C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\b9574431-2006-4bd5-a64d-2eaa57a6b161" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe
"C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe
"C:\Users\Admin\AppData\Local\Temp\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe
"C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe"
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe
"C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe"
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build3.exe
"C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\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 timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe" & exit
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 | 8.8.8.8:53 | 254.217.0.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 188.155.64.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.18.104.in-addr.arpa | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | uaery.top | udp |
| KR | 222.236.49.123:80 | uaery.top | tcp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| US | 8.8.8.8:53 | 123.49.236.222.in-addr.arpa | udp |
| MX | 187.245.185.123:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 123.185.245.187.in-addr.arpa | udp |
| MX | 187.245.185.123:80 | 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 | 23.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 170.168.47.78.in-addr.arpa | udp |
| US | 20.189.173.12:443 | tcp | |
| US | 8.8.8.8:53 | 64.13.109.52.in-addr.arpa | udp |
Files
memory/2040-123-0x00000000023D0000-0x00000000024EB000-memory.dmp
memory/4396-122-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4396-124-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4396-125-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4396-126-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\b9574431-2006-4bd5-a64d-2eaa57a6b161\fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884.exe
| MD5 | 14991cdb1c3b8d98b384a5172006d047 |
| SHA1 | a48edf6d6b5a609a050b6c42fc537937332fc024 |
| SHA256 | fe5758e36675708c6e9d1a2f69aa0999db4fdfe1f76829e0b77ce8a275e0d884 |
| SHA512 | 527d570d329004fe836a8683f01e90fd01e3b25fbab6e90688d667b79f5166fa9cb676b8907c781ef93a747deb47687f668ac90b67817ea71fd1c22ad6fbd2dc |
memory/4396-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-141-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-142-0x0000000000400000-0x0000000000537000-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 | 7da7eadc1f963247ca2914dc400c9ea7 |
| SHA1 | 83c6ffb2c54f49120a8ff45592cd34f7f4dc7960 |
| SHA256 | 5a6e27bbbe6ee0beb1658a93fa61ede3d6db559b9bc3534caec03d7671be66c1 |
| SHA512 | cf3c55b79d7277dc1d09500b21263045d4512e3b9e146fcc4f44684ca77f2c0646ae3dd3593a63e89c0fdc8ed5c8e36da1e47fce7107c1344347109456143f28 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 154c4ff12fe8a69615e9ddf88c841466 |
| SHA1 | a2d6bf85057459bdd22a70e52818225f4f15a861 |
| SHA256 | c306717ca1df8a5b896d754a728c98f37cb712ad60bdd3765598d9c63caddd01 |
| SHA512 | 41937605b6df31fb72fc3a7369f7c753065d3555b3f92390bb2ca0a042bcf58b32aaa540ccba5e25135872f580721459d85b323ed84b36edea4cb640c4a6f16f |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | ee7ad9d8f28e0558a94e667206e8a271 |
| SHA1 | b49a079526da92d55f2d1bc66659836c0f90a086 |
| SHA256 | 9eeeef2cbd8192c6586ffa64114ad0c3e8e5ab3a73817e1044895517c6eba712 |
| SHA512 | 0c1596e7b8e54e0cce8139a339c4c34f5f9391ce0b7051673abe7a43f174f292e0d3267b1ce1186247535941b416962b6fe63cb03855ddea254cf09fddad3223 |
memory/4472-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4472-162-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/1904-166-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/2972-169-0x0000000002DF0000-0x0000000002E47000-memory.dmp
memory/1904-168-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1904-170-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build3.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/4472-177-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\ea39ea54-f0d6-4f37-b299-af9addb42a83\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/1904-180-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1904-191-0x0000000061E00000-0x0000000061EF3000-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/1904-245-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1904-246-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1904-247-0x0000000000400000-0x000000000046C000-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 |