vidar | b19bd5c5dae85d2bc22eb58b02c06de6767734e841ee8ae90e8fbd040e77b779

General

Target
55b64fcb66b5f4b438513919b17cc3ff.exe
Size 669KB
Sample210930-mkdfxahcc8
SHA256 b19bd5c5dae85d2bc22eb58b02c06de6767734e841ee8ae90e8fbd040e77b779
MD5 55b64fcb66b5f4b438513919b17cc3ff
SHA1 9e8aa8aa46fabf7b93e68bfad8916445ae4ef1bb
SHA512 5e0070087ab152e04fee3aa804352d6703ce8059709a33e341491c2738519ed51faf1ed361cb9159aba54b499e078bc69293372b8358198fa424085f83afa6a6
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/504-114-0x0000000000DB0000-0x0000000000E84000-memory.dmp	family_vidar
behavioral2/memory/504-115-0x0000000000400000-0x00000000008D7000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.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	55b64fcb66b5f4b438513919b17cc3ff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	55b64fcb66b5f4b438513919b17cc3ff.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2916	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3164	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe
504	55b64fcb66b5f4b438513919b17cc3ff.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3164	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 504 wrote to memory of 3996	504	55b64fcb66b5f4b438513919b17cc3ff.exe	68
PID 504 wrote to memory of 3996	504	55b64fcb66b5f4b438513919b17cc3ff.exe	68
PID 504 wrote to memory of 3996	504	55b64fcb66b5f4b438513919b17cc3ff.exe	68
PID 3996 wrote to memory of 3164	3996	cmd.exe	70
PID 3996 wrote to memory of 3164	3996	cmd.exe	70
PID 3996 wrote to memory of 3164	3996	cmd.exe	70
PID 3996 wrote to memory of 2916	3996	cmd.exe	71
PID 3996 wrote to memory of 2916	3996	cmd.exe	71
PID 3996 wrote to memory of 2916	3996	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\55b64fcb66b5f4b438513919b17cc3ff.exe
"C:\Users\Admin\AppData\Local\Temp\55b64fcb66b5f4b438513919b17cc3ff.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 55b64fcb66b5f4b438513919b17cc3ff.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\55b64fcb66b5f4b438513919b17cc3ff.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3996
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 55b64fcb66b5f4b438513919b17cc3ff.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3164
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:2916

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/504-114-0x0000000000DB0000-0x0000000000E84000-memory.dmp

Download

memory/504-115-0x0000000000400000-0x00000000008D7000-memory.dmp