Analysis Overview
SHA256
a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5
Threat Level: Known bad
The file a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Vidar
Executes dropped EXE
Downloads MZ/PE file
Modifies file permissions
Checks computer location settings
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
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Program crash
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-11 18:28
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-11 18:28
Reported
2022-10-11 18:31
Platform
win10v2004-20220901-en
Max time kernel
145s
Max time network
149s
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 |
Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\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\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.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\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\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\\0a011225-694a-4ff0-94f8-11b1288ab26d\\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.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 5024 set thread context of 520 | N/A | C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe | C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe |
| PID 3424 set thread context of 4320 | N/A | C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe | C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe |
| PID 3992 set thread context of 2720 | N/A | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\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 |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe
"C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe"
C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe
"C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\0a011225-694a-4ff0-94f8-11b1288ab26d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe
"C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe
"C:\Users\Admin\AppData\Local\Temp\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe
"C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe"
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe
"C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe"
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build3.exe
"C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\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\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2720 -ip 2720
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 764
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 |
| PA | 190.122.162.239:80 | winnlinne.com | tcp |
| BG | 151.251.24.5:80 | rgyui.top | tcp |
| PA | 190.122.162.239:80 | winnlinne.com | tcp |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 195.201.251.151:80 | 195.201.251.151 | tcp |
| NL | 104.80.225.205:443 | tcp | |
| GB | 51.132.193.104:443 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| DE | 195.201.251.151:80 | 195.201.251.151 | tcp |
Files
memory/520-135-0x0000000000000000-mapping.dmp
memory/520-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5024-138-0x00000000023A4000-0x0000000002435000-memory.dmp
memory/520-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5024-139-0x0000000002520000-0x000000000263B000-memory.dmp
memory/520-140-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2912-141-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\0a011225-694a-4ff0-94f8-11b1288ab26d\a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5.exe
| MD5 | 0b02777f65e24e1a4811dc7bf9036e8e |
| SHA1 | 629bb3fd610d222b5154c9b81483e324e1ae30c6 |
| SHA256 | a95ffbc3088bac69e11477926cbab2935515aa872d2d31331bfe5821fa769bf5 |
| SHA512 | a6f922a4821de3df488ac4cc8565bd0b1156c9db08f250bab3b87bc88411009a382b45233544a142606b7d8de5ff4f32528b47c2776a1b672255a9d7edc74e47 |
memory/520-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3424-144-0x0000000000000000-mapping.dmp
memory/520-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3424-146-0x0000000000772000-0x0000000000803000-memory.dmp
memory/4320-147-0x0000000000000000-mapping.dmp
memory/4320-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4320-150-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | ddcd4ccd018db54b12158b195e4d5a7a |
| SHA1 | 438ec6760ac36c6544cbbcc219e42360fc6f2e30 |
| SHA256 | 1cbee91745a62d5da6670269f1f8d40af2f6b0373d918065f1e366b15a1feb21 |
| SHA512 | f266fda44a31b4586e4f92f23aae0ef0823c98595da526d25c1724ceca37ebf91847961bcccfeec993f081ac2eb46af1ffe2b112dcf36590bf2e8707dce035c4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 0698dbc93ba7b6bef73ba316695f8317 |
| SHA1 | a444078ff1eb7c88f52cb4e324365926b491ed47 |
| SHA256 | 263292040d77903899257c1d21201dc64d6f8d6b5a1d945cd5b28d0124d7906c |
| SHA512 | ebacaa7009aebb88199cd70fd0bb3afe69ed300318cb633edd1c0404e42aef829617f589bcbad6cb7ab4bd0a8ae87f7df1435c786184ecc5de61c8fc6950a900 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 6f59ed058aa06aaf5ec6213b955aabd4 |
| SHA1 | baf7b828a563b8fb6111e4ce35e0055575ad80b4 |
| SHA256 | 2d82e2629fa2e08f28b43b15da43dff56c7f4b23b39d66109c7c61998e35b4d5 |
| SHA512 | 6b0f041dafb98b9eaf70ac0d20a98c56e1c42231c4a4ae6e11582b20d20bf8f96dfd7747739a10d77368994441adb0e181b356f8569697b1f22ab4fe931170ce |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 09f9860b7981e1ba42a91f8ba99dc14e |
| SHA1 | 083102f4e2b67f2650345f55ac416ac7df100af7 |
| SHA256 | 67507a46e24233e5cd29fd9794cc9c5e86ea620b3d3e3d16e364171d6437143b |
| SHA512 | 72ecc8b578cb3e3640d8c6269f69d1d77c707012e733cda07878671017afe397bca07ac2838dddd6b2c15589804d3eb07f8fded789376ea27f042d76d1ad1366 |
memory/4320-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3992-156-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/2720-159-0x0000000000000000-mapping.dmp
memory/2720-160-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4448-166-0x0000000000000000-mapping.dmp
memory/3992-165-0x00000000021F0000-0x000000000223F000-memory.dmp
memory/2720-164-0x0000000000400000-0x0000000000463000-memory.dmp
memory/3992-163-0x000000000080D000-0x0000000000839000-memory.dmp
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\6f91fe77-334f-49f3-abd9-79d4f0738757\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3832-169-0x0000000000000000-mapping.dmp
memory/2720-170-0x0000000000400000-0x0000000000463000-memory.dmp
memory/2720-171-0x0000000061E00000-0x0000000061EF3000-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/4320-191-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2720-192-0x0000000000400000-0x0000000000463000-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/4364-195-0x0000000000000000-mapping.dmp
memory/2720-196-0x0000000000400000-0x0000000000463000-memory.dmp