vidar | cff8c57eac176c94df856e247a3deee346d7d884fcf8622ca7c18d111361b407

General

Target
F0UMJvDh49j51kxmt7LO.exe
Size 557KB
Sample210505-nbwtbs2z2a
SHA256 cff8c57eac176c94df856e247a3deee346d7d884fcf8622ca7c18d111361b407
MD5 4d65c32da35233f04705126db7ffea99
SHA1 ed8fe02a49333e63376d7289d77e206122fbe3b8
SHA512 1b7a02a0855ed5c770a7baa5b3eff142db10f959f5dd1340d90736f96be3022fef0080aecdabc5901e490f24f147eef0455e3e5db21af7303d8dce5ed396a0ae
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
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.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	F0UMJvDh49j51kxmt7LO.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	F0UMJvDh49j51kxmt7LO.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2432	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
976	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe
2988	F0UMJvDh49j51kxmt7LO.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	976	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2116	2988	F0UMJvDh49j51kxmt7LO.exe	78
PID 2988 wrote to memory of 2116	2988	F0UMJvDh49j51kxmt7LO.exe	78
PID 2988 wrote to memory of 2116	2988	F0UMJvDh49j51kxmt7LO.exe	78
PID 2116 wrote to memory of 976	2116	cmd.exe	80
PID 2116 wrote to memory of 976	2116	cmd.exe	80
PID 2116 wrote to memory of 976	2116	cmd.exe	80
PID 2116 wrote to memory of 2432	2116	cmd.exe	81
PID 2116 wrote to memory of 2432	2116	cmd.exe	81
PID 2116 wrote to memory of 2432	2116	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\F0UMJvDh49j51kxmt7LO.exe
"C:\Users\Admin\AppData\Local\Temp\F0UMJvDh49j51kxmt7LO.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im F0UMJvDh49j51kxmt7LO.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\F0UMJvDh49j51kxmt7LO.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2116
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im F0UMJvDh49j51kxmt7LO.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:976
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:2432

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

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Downloads

memory/2988-114-0x0000000004930000-0x00000000049C7000-memory.dmp

Download

memory/2988-115-0x0000000000400000-0x0000000002BFB000-memory.dmp