vidar | 21b462c2cde024f0a0abb408979ccefa46a8281902871aef0762c5bf90d99731

General

Target
937049ce9c75cb262f5924fc1f19f260.exe
Size 663KB
Sample210929-db677adebp
SHA256 21b462c2cde024f0a0abb408979ccefa46a8281902871aef0762c5bf90d99731
MD5 937049ce9c75cb262f5924fc1f19f260
SHA1 3e790861e29c0e8eb376a1fa7f5320fda4549927
SHA512 7cc17e04e71435651a241e19b0cc1c7c3b6aa9b90f995850417823ca75c0da4de3df9def9f02095eabf7a6ef16deb629663cbbf41fb28be58e3771f50912c8f5
MD5 SHA1 SHA512

Score

10^/10

vidar discovery spyware stealer suricata

Malware Config

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/636-114-0x0000000000E10000-0x0000000000EE4000-memory.dmp	family_vidar
behavioral2/memory/636-115-0x0000000000400000-0x00000000008D6000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.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	937049ce9c75cb262f5924fc1f19f260.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	937049ce9c75cb262f5924fc1f19f260.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1620	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1388	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe
636	937049ce9c75cb262f5924fc1f19f260.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1388	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 636 wrote to memory of 1128	636	937049ce9c75cb262f5924fc1f19f260.exe	68
PID 636 wrote to memory of 1128	636	937049ce9c75cb262f5924fc1f19f260.exe	68
PID 636 wrote to memory of 1128	636	937049ce9c75cb262f5924fc1f19f260.exe	68
PID 1128 wrote to memory of 1388	1128	cmd.exe	70
PID 1128 wrote to memory of 1388	1128	cmd.exe	70
PID 1128 wrote to memory of 1388	1128	cmd.exe	70
PID 1128 wrote to memory of 1620	1128	cmd.exe	71
PID 1128 wrote to memory of 1620	1128	cmd.exe	71
PID 1128 wrote to memory of 1620	1128	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\937049ce9c75cb262f5924fc1f19f260.exe
"C:\Users\Admin\AppData\Local\Temp\937049ce9c75cb262f5924fc1f19f260.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:636
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 937049ce9c75cb262f5924fc1f19f260.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\937049ce9c75cb262f5924fc1f19f260.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1128
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 937049ce9c75cb262f5924fc1f19f260.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1388
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1620

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

Replay Monitor

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Downloads

memory/636-114-0x0000000000E10000-0x0000000000EE4000-memory.dmp

Download

memory/636-115-0x0000000000400000-0x00000000008D6000-memory.dmp