vidar | ed2ca82131cad5380e978d4c2d489e09f247463021b80cda9241bff82c10fb86

General

Target
9fcf0f5b99f398b9e6b6afaa25c60917.exe
Size 577KB
Sample210923-p6ebfaecfq
SHA256 ed2ca82131cad5380e978d4c2d489e09f247463021b80cda9241bff82c10fb86
MD5 9fcf0f5b99f398b9e6b6afaa25c60917
SHA1 720faa2bf8de76f8e92161b792f0a99eeeb63883
SHA512 e9995cd9c5c3f694a9eb895de2840cdaecfd29681f2ca1616f9860fa2aabbbfdc1e678a3e54b69215c4ab6fdea8235a70773aa63d9e17d1c11647ae872bbb534
MD5 SHA1 SHA512

Score

10^/10

vidar discovery spyware stealer suricata

Malware Config

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1120-61-0x0000000000520000-0x00000000005F4000-memory.dmp	family_vidar
behavioral1/memory/1120-62-0x0000000000400000-0x0000000000517000-memory.dmp	family_vidar

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1716	cmd.exe

Loads dropped DLL 4 IoCs

pid	Process
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	9fcf0f5b99f398b9e6b6afaa25c60917.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	9fcf0f5b99f398b9e6b6afaa25c60917.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
984	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1780	taskkill.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	9fcf0f5b99f398b9e6b6afaa25c60917.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 040000000100000010000000410352dc0ff7501b16f0028eba6f45c50f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c131900000001000000100000006cf252fec3e8f20996de5d4dd9aef42420000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510	9fcf0f5b99f398b9e6b6afaa25c60917.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe
1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1780	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 1716	1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe	29
PID 1120 wrote to memory of 1716	1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe	29
PID 1120 wrote to memory of 1716	1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe	29
PID 1120 wrote to memory of 1716	1120	9fcf0f5b99f398b9e6b6afaa25c60917.exe	29
PID 1716 wrote to memory of 1780	1716	cmd.exe	31
PID 1716 wrote to memory of 1780	1716	cmd.exe	31
PID 1716 wrote to memory of 1780	1716	cmd.exe	31
PID 1716 wrote to memory of 1780	1716	cmd.exe	31
PID 1716 wrote to memory of 984	1716	cmd.exe	33
PID 1716 wrote to memory of 984	1716	cmd.exe	33
PID 1716 wrote to memory of 984	1716	cmd.exe	33
PID 1716 wrote to memory of 984	1716	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\9fcf0f5b99f398b9e6b6afaa25c60917.exe
"C:\Users\Admin\AppData\Local\Temp\9fcf0f5b99f398b9e6b6afaa25c60917.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 9fcf0f5b99f398b9e6b6afaa25c60917.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\9fcf0f5b99f398b9e6b6afaa25c60917.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1716
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 9fcf0f5b99f398b9e6b6afaa25c60917.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1780
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:984