vidar | 24f888e40d3bab16d336bbfcd293bf393b26b253dbdd018436909484825b96d2

General

Target
77ded3c6466568c0cd9f7aaed435865b.exe
Size 1.6MB
Sample210927-wbrrlshfcm
SHA256 24f888e40d3bab16d336bbfcd293bf393b26b253dbdd018436909484825b96d2
MD5 77ded3c6466568c0cd9f7aaed435865b
SHA1 25b3260c32f127e5e04389293cf089f50cf82dd9
SHA512 8f2fb333bb1d9e7b809ebcc8b7dc4215697d3d61aa225a01b3ca35b5a57fce7fffb2c0899117929497fcfb932b87510db388e7c7c8a6b84f5b7bf1e448ae2880
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/980-62-0x0000000002D40000-0x0000000002E5B000-memory.dmp	family_vidar
behavioral1/memory/980-63-0x0000000000400000-0x0000000000599000-memory.dmp	family_vidar

Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1944	cmd.exe

Loads dropped DLL 4 IoCs

pid	Process
980	77ded3c6466568c0cd9f7aaed435865b.exe
980	77ded3c6466568c0cd9f7aaed435865b.exe
980	77ded3c6466568c0cd9f7aaed435865b.exe
980	77ded3c6466568c0cd9f7aaed435865b.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	77ded3c6466568c0cd9f7aaed435865b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	77ded3c6466568c0cd9f7aaed435865b.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1208	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
468	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	77ded3c6466568c0cd9f7aaed435865b.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	77ded3c6466568c0cd9f7aaed435865b.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
980	77ded3c6466568c0cd9f7aaed435865b.exe
980	77ded3c6466568c0cd9f7aaed435865b.exe
980	77ded3c6466568c0cd9f7aaed435865b.exe
980	77ded3c6466568c0cd9f7aaed435865b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	468	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 980 wrote to memory of 1944	980	77ded3c6466568c0cd9f7aaed435865b.exe	27
PID 980 wrote to memory of 1944	980	77ded3c6466568c0cd9f7aaed435865b.exe	27
PID 980 wrote to memory of 1944	980	77ded3c6466568c0cd9f7aaed435865b.exe	27
PID 980 wrote to memory of 1944	980	77ded3c6466568c0cd9f7aaed435865b.exe	27
PID 1944 wrote to memory of 468	1944	cmd.exe	29
PID 1944 wrote to memory of 468	1944	cmd.exe	29
PID 1944 wrote to memory of 468	1944	cmd.exe	29
PID 1944 wrote to memory of 468	1944	cmd.exe	29
PID 1944 wrote to memory of 1208	1944	cmd.exe	31
PID 1944 wrote to memory of 1208	1944	cmd.exe	31
PID 1944 wrote to memory of 1208	1944	cmd.exe	31
PID 1944 wrote to memory of 1208	1944	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\77ded3c6466568c0cd9f7aaed435865b.exe
"C:\Users\Admin\AppData\Local\Temp\77ded3c6466568c0cd9f7aaed435865b.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 77ded3c6466568c0cd9f7aaed435865b.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\77ded3c6466568c0cd9f7aaed435865b.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 77ded3c6466568c0cd9f7aaed435865b.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:468
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:1208