vidar | a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8

General

Target
a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
Size 593KB
Sample210926-xrtftafbfl
SHA256 a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8
MD5 2bfd3556c9283e527e972bf836c764b7
SHA1 f8e240c3dbb6259f66484dc15a8e7ae72ef69318
SHA512 617a172787e4fdf603eb0a75fac425e6cd4929985a151a1b9073cc5bae4cabe3b4edba3ab68def259b3e03bd59f5670abcb59b3ec14730fcfbcce93ccfed2385
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

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/2352-115-0x0000000002330000-0x0000000002404000-memory.dmp	family_vidar
behavioral1/memory/2352-116-0x0000000000400000-0x000000000051B000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.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	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1932	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3844	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3844	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 3700	2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe	70
PID 2352 wrote to memory of 3700	2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe	70
PID 2352 wrote to memory of 3700	2352	a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe	70
PID 3700 wrote to memory of 3844	3700	cmd.exe	72
PID 3700 wrote to memory of 3844	3700	cmd.exe	72
PID 3700 wrote to memory of 3844	3700	cmd.exe	72
PID 3700 wrote to memory of 1932	3700	cmd.exe	74
PID 3700 wrote to memory of 1932	3700	cmd.exe	74
PID 3700 wrote to memory of 1932	3700	cmd.exe	74

C:\Users\Admin\AppData\Local\Temp\a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe
"C:\Users\Admin\AppData\Local\Temp\a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3700
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im a335a14188c608ba63b172cb891cd710c2bae0d56816c264f65037600d78e4e8.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3844
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1932

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/2352-115-0x0000000002330000-0x0000000002404000-memory.dmp

Download

memory/2352-116-0x0000000000400000-0x000000000051B000-memory.dmp