vidar | 95cc8eb2e2e0064a0788032bec3c3bdcbd4edef6b0952e071d5dac5b29f6e51f

General

Target
a4a9b253aa59a59c2040ad1dbe95c47a.exe
Size 672KB
Sample210920-hvzdxafhal
SHA256 95cc8eb2e2e0064a0788032bec3c3bdcbd4edef6b0952e071d5dac5b29f6e51f
MD5 a4a9b253aa59a59c2040ad1dbe95c47a
SHA1 793d258a41c66760d38988f683e4f6696e13e045
SHA512 26c73f1b86e699fafe9da7890821071c38da58ce3feac6cb8605f93034354294c2512c735ca11ab76d2ec05ac7e7a98e0ad0c5f6cf1db94c2569ae9d15a8cca3
MD5 SHA1 SHA512

Score

10^/10

vidar 1008 discovery spyware stealer suricata

Malware Config

Extracted

Family

vidar

Version

40.7

Botnet

1008

C2

https://petrenko96.tumblr.com/

Attributes

profile_id
1008

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/644-114-0x0000000000A50000-0x0000000000B24000-memory.dmp	family_vidar
behavioral2/memory/644-115-0x0000000000400000-0x00000000004D7000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.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	a4a9b253aa59a59c2040ad1dbe95c47a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a4a9b253aa59a59c2040ad1dbe95c47a.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2352	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1440	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\D1EB23A46D17D68FD92564C2F1F1601764D8E349	a4a9b253aa59a59c2040ad1dbe95c47a.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	a4a9b253aa59a59c2040ad1dbe95c47a.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe
644	a4a9b253aa59a59c2040ad1dbe95c47a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1440	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 1156	644	a4a9b253aa59a59c2040ad1dbe95c47a.exe	68
PID 644 wrote to memory of 1156	644	a4a9b253aa59a59c2040ad1dbe95c47a.exe	68
PID 644 wrote to memory of 1156	644	a4a9b253aa59a59c2040ad1dbe95c47a.exe	68
PID 1156 wrote to memory of 1440	1156	cmd.exe	70
PID 1156 wrote to memory of 1440	1156	cmd.exe	70
PID 1156 wrote to memory of 1440	1156	cmd.exe	70
PID 1156 wrote to memory of 2352	1156	cmd.exe	72
PID 1156 wrote to memory of 2352	1156	cmd.exe	72
PID 1156 wrote to memory of 2352	1156	cmd.exe	72

C:\Users\Admin\AppData\Local\Temp\a4a9b253aa59a59c2040ad1dbe95c47a.exe
"C:\Users\Admin\AppData\Local\Temp\a4a9b253aa59a59c2040ad1dbe95c47a.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im a4a9b253aa59a59c2040ad1dbe95c47a.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a4a9b253aa59a59c2040ad1dbe95c47a.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im a4a9b253aa59a59c2040ad1dbe95c47a.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1440
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:2352