vidar | f35bc946ea6919fa86ef778e39ee36e8b6c2c4e335cd82394ed9a29211779ce8

General

Target
a67a88165c2a332821c6224f22ffde7e.exe
Size 606KB
Sample210923-cwvt8aecc3
SHA256 f35bc946ea6919fa86ef778e39ee36e8b6c2c4e335cd82394ed9a29211779ce8
MD5 a67a88165c2a332821c6224f22ffde7e
SHA1 87778ca2b92ce1c72eaaf9728c5367b17412967b
SHA512 7e9879d2982567dd7b44531e95100858ed678c3bcca61cc4001355c01d715b5b7d20a01e4a75c8b0a257ea68c757c7d495bb9e6734df5f7d169709368143a748
MD5 SHA1 SHA512

Score

10^/10

vidar discovery spyware stealer

Malware Config

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1996-62-0x0000000000400000-0x000000000051E000-memory.dmp	family_vidar
behavioral1/memory/1996-61-0x0000000001C90000-0x0000000001D64000-memory.dmp	family_vidar

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1560	cmd.exe

Loads dropped DLL 4 IoCs

pid	Process
1996	a67a88165c2a332821c6224f22ffde7e.exe
1996	a67a88165c2a332821c6224f22ffde7e.exe
1996	a67a88165c2a332821c6224f22ffde7e.exe
1996	a67a88165c2a332821c6224f22ffde7e.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	a67a88165c2a332821c6224f22ffde7e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a67a88165c2a332821c6224f22ffde7e.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1812	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1520	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	a67a88165c2a332821c6224f22ffde7e.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	a67a88165c2a332821c6224f22ffde7e.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1996	a67a88165c2a332821c6224f22ffde7e.exe
1996	a67a88165c2a332821c6224f22ffde7e.exe
1996	a67a88165c2a332821c6224f22ffde7e.exe
1996	a67a88165c2a332821c6224f22ffde7e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 1560	1996	a67a88165c2a332821c6224f22ffde7e.exe	29
PID 1996 wrote to memory of 1560	1996	a67a88165c2a332821c6224f22ffde7e.exe	29
PID 1996 wrote to memory of 1560	1996	a67a88165c2a332821c6224f22ffde7e.exe	29
PID 1996 wrote to memory of 1560	1996	a67a88165c2a332821c6224f22ffde7e.exe	29
PID 1560 wrote to memory of 1520	1560	cmd.exe	31
PID 1560 wrote to memory of 1520	1560	cmd.exe	31
PID 1560 wrote to memory of 1520	1560	cmd.exe	31
PID 1560 wrote to memory of 1520	1560	cmd.exe	31
PID 1560 wrote to memory of 1812	1560	cmd.exe	33
PID 1560 wrote to memory of 1812	1560	cmd.exe	33
PID 1560 wrote to memory of 1812	1560	cmd.exe	33
PID 1560 wrote to memory of 1812	1560	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\a67a88165c2a332821c6224f22ffde7e.exe
"C:\Users\Admin\AppData\Local\Temp\a67a88165c2a332821c6224f22ffde7e.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im a67a88165c2a332821c6224f22ffde7e.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a67a88165c2a332821c6224f22ffde7e.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1560
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im a67a88165c2a332821c6224f22ffde7e.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1520
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1812