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

Deletes itself 1 IoCs

pid	Process
588	cmd.exe

Loads dropped DLL 4 IoCs

pid	Process
1668	F0UMJvDh49j51kxmt7LO.exe
1668	F0UMJvDh49j51kxmt7LO.exe
1668	F0UMJvDh49j51kxmt7LO.exe
1668	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
684	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
108	taskkill.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	F0UMJvDh49j51kxmt7LO.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	F0UMJvDh49j51kxmt7LO.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1668	F0UMJvDh49j51kxmt7LO.exe
1668	F0UMJvDh49j51kxmt7LO.exe
1668	F0UMJvDh49j51kxmt7LO.exe
1668	F0UMJvDh49j51kxmt7LO.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	108	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 588	1668	F0UMJvDh49j51kxmt7LO.exe	31
PID 1668 wrote to memory of 588	1668	F0UMJvDh49j51kxmt7LO.exe	31
PID 1668 wrote to memory of 588	1668	F0UMJvDh49j51kxmt7LO.exe	31
PID 1668 wrote to memory of 588	1668	F0UMJvDh49j51kxmt7LO.exe	31
PID 588 wrote to memory of 108	588	cmd.exe	33
PID 588 wrote to memory of 108	588	cmd.exe	33
PID 588 wrote to memory of 108	588	cmd.exe	33
PID 588 wrote to memory of 108	588	cmd.exe	33
PID 588 wrote to memory of 684	588	cmd.exe	35
PID 588 wrote to memory of 684	588	cmd.exe	35
PID 588 wrote to memory of 684	588	cmd.exe	35
PID 588 wrote to memory of 684	588	cmd.exe	35

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
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1668
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:588
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im F0UMJvDh49j51kxmt7LO.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:108
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:684