vidar | 9fe9d2f571a89db6dd353ab7e6cc5519799eb2454827a10a704436401d010b21

General

Target
67ae8bf0434b992f46512d70b832cc79.exe
Size 714KB
Sample210928-jftesabbbq
SHA256 9fe9d2f571a89db6dd353ab7e6cc5519799eb2454827a10a704436401d010b21
MD5 67ae8bf0434b992f46512d70b832cc79
SHA1 3d1908e6d690a63f063eaa74acd93c47e159bdf8
SHA512 e167c49238e01fdbaf46990d18e995d7639914566bef01390870785f8952fe41069397090112f37c1354d0cfcc95e806f2050a57b6e721ecab304f5d3d08836b
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
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
behavioral1/memory/1632-61-0x0000000002C70000-0x0000000002D44000-memory.dmp	family_vidar
behavioral1/memory/1632-62-0x0000000000400000-0x0000000002BFC000-memory.dmp	family_vidar

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1672	cmd.exe

Loads dropped DLL 4 IoCs

pid	Process
1632	67ae8bf0434b992f46512d70b832cc79.exe
1632	67ae8bf0434b992f46512d70b832cc79.exe
1632	67ae8bf0434b992f46512d70b832cc79.exe
1632	67ae8bf0434b992f46512d70b832cc79.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	67ae8bf0434b992f46512d70b832cc79.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	67ae8bf0434b992f46512d70b832cc79.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1844	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1104	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\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	67ae8bf0434b992f46512d70b832cc79.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	67ae8bf0434b992f46512d70b832cc79.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1632	67ae8bf0434b992f46512d70b832cc79.exe
1632	67ae8bf0434b992f46512d70b832cc79.exe
1632	67ae8bf0434b992f46512d70b832cc79.exe
1632	67ae8bf0434b992f46512d70b832cc79.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1104	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1632 wrote to memory of 1672	1632	67ae8bf0434b992f46512d70b832cc79.exe	29
PID 1632 wrote to memory of 1672	1632	67ae8bf0434b992f46512d70b832cc79.exe	29
PID 1632 wrote to memory of 1672	1632	67ae8bf0434b992f46512d70b832cc79.exe	29
PID 1632 wrote to memory of 1672	1632	67ae8bf0434b992f46512d70b832cc79.exe	29
PID 1672 wrote to memory of 1104	1672	cmd.exe	31
PID 1672 wrote to memory of 1104	1672	cmd.exe	31
PID 1672 wrote to memory of 1104	1672	cmd.exe	31
PID 1672 wrote to memory of 1104	1672	cmd.exe	31
PID 1672 wrote to memory of 1844	1672	cmd.exe	33
PID 1672 wrote to memory of 1844	1672	cmd.exe	33
PID 1672 wrote to memory of 1844	1672	cmd.exe	33
PID 1672 wrote to memory of 1844	1672	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\67ae8bf0434b992f46512d70b832cc79.exe
"C:\Users\Admin\AppData\Local\Temp\67ae8bf0434b992f46512d70b832cc79.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 67ae8bf0434b992f46512d70b832cc79.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\67ae8bf0434b992f46512d70b832cc79.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1672
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 67ae8bf0434b992f46512d70b832cc79.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1104
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1844