vidar | 34197627fad94070514ffbfbe93c3df4eb9ed6df897095d2bcb1ca6848a8f096

General

Target
5.exe
Size 640KB
Sample210504-tmq6b4afv6
SHA256 34197627fad94070514ffbfbe93c3df4eb9ed6df897095d2bcb1ca6848a8f096
MD5 67466140accc0e7627a4066413a54ead
SHA1 6840de50da8c11c41ea9ab7503844fe3cbc39417
SHA512 85cc86316f22f95a591028b07771cdfa04936440db46a115b329bcdc827112c43976470dc051876a0f24adbed57a8189a59e4c9c0ffbf1e2b330a389e104033d
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

Loads dropped DLL 2 IoCs

pid	Process
908	5.exe
908	5.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	5.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
996	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2188	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
908	5.exe
908	5.exe
908	5.exe
908	5.exe
908	5.exe
908	5.exe
908	5.exe
908	5.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 908 wrote to memory of 3332	908	5.exe	78
PID 908 wrote to memory of 3332	908	5.exe	78
PID 908 wrote to memory of 3332	908	5.exe	78
PID 3332 wrote to memory of 2188	3332	cmd.exe	80
PID 3332 wrote to memory of 2188	3332	cmd.exe	80
PID 3332 wrote to memory of 2188	3332	cmd.exe	80
PID 3332 wrote to memory of 996	3332	cmd.exe	81
PID 3332 wrote to memory of 996	3332	cmd.exe	81
PID 3332 wrote to memory of 996	3332	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\5.exe
"C:\Users\Admin\AppData\Local\Temp\5.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\5.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3332
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 5.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2188
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:996

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

4

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/908-114-0x00000000025F0000-0x0000000002687000-memory.dmp

Download

memory/908-115-0x0000000000400000-0x0000000000898000-memory.dmp