vidar | dfffd05bea8aa9f0d2e10dfe06276734ff17522ad3e374f752301c686965a379

General

Target
ef6fcef54a69957f72e57c36483253fb.exe
Size 703KB
Sample211006-lerkxaahf4
SHA256 dfffd05bea8aa9f0d2e10dfe06276734ff17522ad3e374f752301c686965a379
MD5 ef6fcef54a69957f72e57c36483253fb
SHA1 cc60380ae757e1872047455bbfc171f239942d79
SHA512 d63d7b9167b901e1ebccb102fc194c0b8ea1c6394f19333022ca9acb62061b84dba3940596c59989f062f7f64f8980fca30fd2de990529b48df8a92f3469b313
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/2412-115-0x00000000007C0000-0x0000000000896000-memory.dmp	family_vidar
behavioral2/memory/2412-116-0x0000000000400000-0x00000000004D9000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.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	ef6fcef54a69957f72e57c36483253fb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ef6fcef54a69957f72e57c36483253fb.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1308	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2788	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe
2412	ef6fcef54a69957f72e57c36483253fb.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2788	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 1860	2412	ef6fcef54a69957f72e57c36483253fb.exe	70
PID 2412 wrote to memory of 1860	2412	ef6fcef54a69957f72e57c36483253fb.exe	70
PID 2412 wrote to memory of 1860	2412	ef6fcef54a69957f72e57c36483253fb.exe	70
PID 1860 wrote to memory of 2788	1860	cmd.exe	72
PID 1860 wrote to memory of 2788	1860	cmd.exe	72
PID 1860 wrote to memory of 2788	1860	cmd.exe	72
PID 1860 wrote to memory of 1308	1860	cmd.exe	74
PID 1860 wrote to memory of 1308	1860	cmd.exe	74
PID 1860 wrote to memory of 1308	1860	cmd.exe	74

C:\Users\Admin\AppData\Local\Temp\ef6fcef54a69957f72e57c36483253fb.exe
"C:\Users\Admin\AppData\Local\Temp\ef6fcef54a69957f72e57c36483253fb.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im ef6fcef54a69957f72e57c36483253fb.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\ef6fcef54a69957f72e57c36483253fb.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im ef6fcef54a69957f72e57c36483253fb.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2788
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1308

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/2412-115-0x00000000007C0000-0x0000000000896000-memory.dmp

Download

memory/2412-116-0x0000000000400000-0x00000000004D9000-memory.dmp