vidar | 774753d2a216a134c971df97df73b7c8efb0f1207e7948dbacff5e2e30f85456

General

Target
642095b6952177a920e21195a0ae52ba.exe
Size 637KB
Sample210929-dpnm1addb8
SHA256 774753d2a216a134c971df97df73b7c8efb0f1207e7948dbacff5e2e30f85456
MD5 642095b6952177a920e21195a0ae52ba
SHA1 135d1bffc0f725149a70aed23cf3289ded881367
SHA512 9d1485a97a0f91a1434f3f88a9b8b2920f264ce08c7919b074b9a9fd95e1cf90a3ac45150a22ca7a32d5eff5f3bc09ca4166c9a59c267a4f0505181edd05f3a7
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
behavioral2/memory/632-114-0x0000000002220000-0x00000000022F4000-memory.dmp	family_vidar
behavioral2/memory/632-115-0x0000000000400000-0x00000000004D7000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.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	642095b6952177a920e21195a0ae52ba.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	642095b6952177a920e21195a0ae52ba.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1744	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1432	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe
632	642095b6952177a920e21195a0ae52ba.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 1212	632	642095b6952177a920e21195a0ae52ba.exe	68
PID 632 wrote to memory of 1212	632	642095b6952177a920e21195a0ae52ba.exe	68
PID 632 wrote to memory of 1212	632	642095b6952177a920e21195a0ae52ba.exe	68
PID 1212 wrote to memory of 1432	1212	cmd.exe	70
PID 1212 wrote to memory of 1432	1212	cmd.exe	70
PID 1212 wrote to memory of 1432	1212	cmd.exe	70
PID 1212 wrote to memory of 1744	1212	cmd.exe	71
PID 1212 wrote to memory of 1744	1212	cmd.exe	71
PID 1212 wrote to memory of 1744	1212	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\642095b6952177a920e21195a0ae52ba.exe
"C:\Users\Admin\AppData\Local\Temp\642095b6952177a920e21195a0ae52ba.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 642095b6952177a920e21195a0ae52ba.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\642095b6952177a920e21195a0ae52ba.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1212
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 642095b6952177a920e21195a0ae52ba.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1432
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/632-114-0x0000000002220000-0x00000000022F4000-memory.dmp

Download

memory/632-115-0x0000000000400000-0x00000000004D7000-memory.dmp