Analysis Overview
SHA256
c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152
Threat Level: Known bad
The file c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Vidar
Detected Djvu ransomware
Downloads MZ/PE file
Executes dropped EXE
Modifies file permissions
Reads user/profile data of web browsers
Checks computer location settings
Loads dropped DLL
Accesses 2FA software files, possible credential harvesting
Looks up external IP address via web service
Adds Run key to start application
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Kills process with taskkill
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-19 15:12
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-19 15:12
Reported
2022-10-19 15:14
Platform
win10v2004-20220901-en
Max time kernel
123s
Max time network
129s
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\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.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\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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\\a188fe73-653e-4b06-b341-0c4595a79552\\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.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 5032 set thread context of 3792 | N/A | C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe | C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe |
| PID 3660 set thread context of 1932 | N/A | C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe | C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe |
| PID 2376 set thread context of 2524 | N/A | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe
"C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe"
C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe
"C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a188fe73-653e-4b06-b341-0c4595a79552" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe
"C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe
"C:\Users\Admin\AppData\Local\Temp\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe
"C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe"
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe
"C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe"
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build3.exe
"C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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" pu/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\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 |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | rgyui.top | udp |
| US | 8.8.8.8:53 | winnlinne.com | udp |
| MX | 189.156.127.141:80 | winnlinne.com | tcp |
| KR | 222.236.49.123:80 | winnlinne.com | tcp |
| KR | 222.236.49.123:80 | 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 |
| NL | 67.26.109.254:80 | tcp | |
| NL | 104.80.225.205:443 | tcp | |
| US | 20.189.173.10:443 | tcp | |
| NL | 87.248.202.1:80 | tcp | |
| NL | 87.248.202.1:80 | tcp | |
| NL | 87.248.202.1:80 | tcp | |
| US | 52.109.12.19:443 | tcp |
Files
memory/3792-132-0x0000000000000000-mapping.dmp
memory/3792-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3792-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5032-135-0x000000000070A000-0x000000000079C000-memory.dmp
memory/5032-136-0x00000000022F0000-0x000000000240B000-memory.dmp
memory/3792-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3792-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/224-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a188fe73-653e-4b06-b341-0c4595a79552\c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152.exe
| MD5 | e3e3ffadf25e3730183de35a2d57f6b0 |
| SHA1 | 25e34fb228b3835fd7237f0cd3187e30b39b0eb8 |
| SHA256 | c44b6e5cd31c900a31dc0d017bce84a682e4f495db31f0f34ff942d99dbb9152 |
| SHA512 | 3cc1b16ec05d9b01500c61152a5721cffb8c8a8401bd44cc5359618cda4c923b81bb10c6c9917cd5ba18c3be67e07e1cdc2e1c2ca310b49909d5c151d4cee514 |
memory/3660-141-0x0000000000000000-mapping.dmp
memory/3792-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1932-143-0x0000000000000000-mapping.dmp
memory/1932-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3660-146-0x00000000008CF000-0x0000000000961000-memory.dmp
memory/1932-147-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 0aac4e8e8cd02cca5c96012bb3376633 |
| SHA1 | be36e20c5a671dcbb7c2bf13d15171bc604dcdd0 |
| SHA256 | 06033d382b351ad6dbbadd93adf16527fafd0fce250dd4e9d5b8d6f5ac899a1d |
| SHA512 | 7b79ce382af7fd864d21cf8800fa12df9819a490df9cf3f4298ce7819d28ac34e4ac2d94aff5ecee3eab97565f30f2163572a18c6fbe9883c9a8766e51b0e36c |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 97ab7ffd65186e85f453dc7c02637528 |
| SHA1 | f22312a6a44613be85c0370878456a965f869a40 |
| SHA256 | 630df8e970cc3b1ad508db713dd8be52e0ac7a5826f3f264a266232f9a1c23ee |
| SHA512 | 37d90c98e72ad55b2cbb938541c81bac1aa9d2b8a7e19f0fbfaa365b49e7bef2d3199f03e46aa9fbf3055f3701d21860820c451065f7e425d39bf86ca606bfb0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 006c98bc42ac1d15f0ec70e3488783c5 |
| SHA1 | a8c8302826468c903b511e206d6d058e2c3acdaa |
| SHA256 | e24883740fbed2781e4df4e5387cd95c3345ec9944edeeb36babd2c10135fa00 |
| SHA512 | e0caea17f99a18483e0195c5311942c195ef42532f1868bfb5c64b3f6cb72cc0fc58414176a9bfc66452e11d17c2058eafb483a41890f502ec76dc3a6807f2f4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 38be2d66c554a0487d130c8f53de8881 |
| SHA1 | 1beb16f80a577f1bcffe85ea3e1c0418317e531f |
| SHA256 | a919914a8598d6a01ca81a633ffdeaa3c69e07fbea423124c192a05de2acd2e3 |
| SHA512 | 7c93de0881cea71856efd67c58df1b63da6923b8fffc35646a61dd417bf3a90440874481b6ebdb30b9c8a116c7fdde93c9549519f3bedad198ef2816bf27a453 |
memory/1932-152-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/2376-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/2524-156-0x0000000000000000-mapping.dmp
memory/2524-157-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/2524-162-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2376-159-0x000000000066D000-0x0000000000699000-memory.dmp
memory/2376-161-0x00000000021D0000-0x000000000221F000-memory.dmp
memory/2524-163-0x0000000000400000-0x0000000000463000-memory.dmp
memory/812-164-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\6b55a97b-9d73-4275-ac12-5f01b5b45ad3\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/1744-167-0x0000000000000000-mapping.dmp
memory/2524-168-0x0000000061E00000-0x0000000061EF3000-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/1932-188-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4600-189-0x0000000000000000-mapping.dmp
memory/2524-191-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2712-190-0x0000000000000000-mapping.dmp
memory/3152-192-0x0000000000000000-mapping.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/4472-195-0x0000000000000000-mapping.dmp