Analysis Overview
SHA256
8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0
Threat Level: Known bad
The file 8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Vidar
Executes dropped EXE
Downloads MZ/PE file
Checks computer location settings
Modifies file permissions
Loads dropped DLL
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
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
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
2023-01-07 12:14
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-01-07 12:14
Reported
2023-01-07 12:16
Platform
win10v2004-20220812-en
Max time kernel
70s
Max time network
133s
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\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\82416508-ba94-4251-b202-664b0a39e2c0\\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.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 532 set thread context of 2276 | N/A | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe |
| PID 2296 set thread context of 400 | N/A | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe | C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe |
| PID 3632 set thread context of 1440 | N/A | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\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\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\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\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe
"C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe"
C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe
"C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\82416508-ba94-4251-b202-664b0a39e2c0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe
"C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe
"C:\Users\Admin\AppData\Local\Temp\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe
"C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe"
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build3.exe
"C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\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\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe
"C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\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 |
| 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 | 8.8.8.8:53 | spaceris.com | udp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 190.117.75.91:80 | uaery.top | tcp |
| N/A | 211.119.84.111:80 | spaceris.com | tcp |
| N/A | 209.197.3.8:80 | tcp | |
| N/A | 209.197.3.8:80 | tcp | |
| N/A | 211.119.84.111:80 | spaceris.com | tcp |
| N/A | 8.8.8.8:53 | t.me | udp |
| N/A | 149.154.167.99:443 | t.me | tcp |
| N/A | 94.130.190.48:80 | 94.130.190.48 | tcp |
Files
memory/532-132-0x0000000004D83000-0x0000000004E15000-memory.dmp
memory/532-133-0x0000000004E70000-0x0000000004F8B000-memory.dmp
memory/2276-134-0x0000000000000000-mapping.dmp
memory/2276-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2276-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2276-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2276-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5020-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\82416508-ba94-4251-b202-664b0a39e2c0\8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0.exe
| MD5 | e6800d76e08b19a96caef31f0f947bbc |
| SHA1 | 1db0df1014fd8b0d6bab94098717d50a4077491b |
| SHA256 | 8571c5b52db6c9b187edc7cac57a857ce46966d1d4e78bae98586cb844d36ba0 |
| SHA512 | f96ef931af965c9c6c46515f435bd26bc91b150fa05aee4d79ab32c8603879022ca1e2ebdbfbbb24198b7321937d3d72b25c17d091b9388e99678ad950e2869e |
memory/2296-141-0x0000000000000000-mapping.dmp
memory/2276-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/400-143-0x0000000000000000-mapping.dmp
memory/400-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2296-146-0x0000000003260000-0x00000000032F2000-memory.dmp
memory/400-147-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 7c56401cb6bd1ae402e06f0fe35f81c4 |
| SHA1 | b82bbb9fa39266796cafcd308ef4300fc92e3399 |
| SHA256 | 0c58c7bc18d38a3096da6f3575f1c6f8d79b69382d8e89bb5fca917d3cdb7f65 |
| SHA512 | 2ea607c2dc04c8ef34ecb4c4bd297e0f0882b179303565863d1745172322133b78186fa04334e82c135e25fd717719ceec917f49682a4eac37034ea87bb2b6f3 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 0436479e821c68aa17cdacb8ea7b4347 |
| SHA1 | 175285e9da2ac028d25004d41014d4790a2d976b |
| SHA256 | ab3eeb0bbe601e93b4434c88e89ff4a2a08c7cfbb68d22b8a29ac4adc9d453ac |
| SHA512 | adf9afbd5f0b9df887fc7c2f7e4d792be9b630dc8363cd67a4c7187f3af23d5f2098edff1d3988dca673b505608bd7c7d469f6b2d826d3cfc386e80a09be1cb6 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | b7c6de1ac1fb1384ceffbdf928c73986 |
| SHA1 | 86e3c39bfaa4002bb3658eae7f0a21fc769bb481 |
| SHA256 | d1e36afaecc1b738d44e5067458cd406d8f0d36ecfe7ea35c0cc549fecc31b26 |
| SHA512 | c6bc48a49243c724bbf5601cbe3937479d330fc757820de64364dd3bf5e615959a25f0ce0a68dea2cf8bfd70ea514cba61101b4cc6bca33aa13634714b772883 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 411cd537dcecbf901759b8e6c1bdb076 |
| SHA1 | 655df9870867a1760ad1a2c967b330c61767437a |
| SHA256 | aa9e441c6cf813efd9ba76fe4ae52d884a5c7d222ed221903c42f09bc14eb7db |
| SHA512 | ea780f875c86f8694f67d236a0af066b952862356edb681375e6c387103a91ce085345359f8fe83dd630d310ee6b7637512e5868951c4c257daa411ab9c03e71 |
memory/400-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3632-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
memory/5060-156-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3944-159-0x0000000000000000-mapping.dmp
memory/1440-160-0x0000000000000000-mapping.dmp
memory/1440-161-0x0000000000400000-0x0000000000460000-memory.dmp
C:\Users\Admin\AppData\Local\c0efc647-2013-4c63-89ad-b8d4481f80ff\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
memory/3632-163-0x0000000000538000-0x0000000000565000-memory.dmp
memory/1440-164-0x0000000000400000-0x0000000000460000-memory.dmp
memory/1440-166-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3632-165-0x00000000020E0000-0x000000000212C000-memory.dmp
memory/400-167-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1440-168-0x0000000000400000-0x0000000000460000-memory.dmp
memory/1440-169-0x0000000050AC0000-0x0000000050B52000-memory.dmp
C:\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
C:\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
C:\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
C:\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
memory/1440-192-0x0000000000400000-0x0000000000460000-memory.dmp
memory/460-193-0x0000000000000000-mapping.dmp
memory/1440-194-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3476-195-0x0000000000000000-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/4864-198-0x0000000000000000-mapping.dmp