vidar | efdb5e9fdd74b02096b66c5fa2a68de20af19f069f1f18d4cad5ddd06c0776b3

General

Target
b93543cd68fd2179f29e0563f19b3480.exe
Size 610KB
Sample210423-2e5tnas8ea
SHA256 efdb5e9fdd74b02096b66c5fa2a68de20af19f069f1f18d4cad5ddd06c0776b3
MD5 b93543cd68fd2179f29e0563f19b3480
SHA1 0fb06db1ccff7c80160591ffed3517f198b2d3d0
SHA512 0ea256a44a3e7cd62e8fea5070b001688f69cedb346c15996e7352459e5621ae6ae9bf53996ff52081842c63d0edd409258875ad91cb9eb2e339f55c30554806
MD5 SHA1 SHA512

Score

10^/10

vidar discovery spyware stealer

Malware Config

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1692	cmd.exe

Loads dropped DLL 4 IoCs

pid	Process
756	b93543cd68fd2179f29e0563f19b3480.exe
756	b93543cd68fd2179f29e0563f19b3480.exe
756	b93543cd68fd2179f29e0563f19b3480.exe
756	b93543cd68fd2179f29e0563f19b3480.exe

Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b93543cd68fd2179f29e0563f19b3480.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	b93543cd68fd2179f29e0563f19b3480.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
768	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1548	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\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	b93543cd68fd2179f29e0563f19b3480.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	b93543cd68fd2179f29e0563f19b3480.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
756	b93543cd68fd2179f29e0563f19b3480.exe
756	b93543cd68fd2179f29e0563f19b3480.exe
756	b93543cd68fd2179f29e0563f19b3480.exe
756	b93543cd68fd2179f29e0563f19b3480.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1548	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 756 wrote to memory of 1692	756	b93543cd68fd2179f29e0563f19b3480.exe	31
PID 756 wrote to memory of 1692	756	b93543cd68fd2179f29e0563f19b3480.exe	31
PID 756 wrote to memory of 1692	756	b93543cd68fd2179f29e0563f19b3480.exe	31
PID 756 wrote to memory of 1692	756	b93543cd68fd2179f29e0563f19b3480.exe	31
PID 1692 wrote to memory of 1548	1692	cmd.exe	33
PID 1692 wrote to memory of 1548	1692	cmd.exe	33
PID 1692 wrote to memory of 1548	1692	cmd.exe	33
PID 1692 wrote to memory of 1548	1692	cmd.exe	33
PID 1692 wrote to memory of 768	1692	cmd.exe	35
PID 1692 wrote to memory of 768	1692	cmd.exe	35
PID 1692 wrote to memory of 768	1692	cmd.exe	35
PID 1692 wrote to memory of 768	1692	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\b93543cd68fd2179f29e0563f19b3480.exe
"C:\Users\Admin\AppData\Local\Temp\b93543cd68fd2179f29e0563f19b3480.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im b93543cd68fd2179f29e0563f19b3480.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b93543cd68fd2179f29e0563f19b3480.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im b93543cd68fd2179f29e0563f19b3480.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1548
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:768