vidar | aa12ad772adf47f16f71cd07714ee02ed1fddab1fa80551d6dbc5d50589aebfc

General

Target
78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
Size 661KB
Sample210902-3msxdabgf9
SHA256 aa12ad772adf47f16f71cd07714ee02ed1fddab1fa80551d6dbc5d50589aebfc
MD5 78c06b9a03f2d8fcb86e7e0a8cedb5da
SHA1 2f44713c28754eeef871ccbbd9e8784dd145d5f8
SHA512 7e9447aa24927deeb094c0211b1cd0302bf3479e53ac225e8c4fb9bc68905ae645b3ce3e11cad2b9c54a5811f2615235bff2ce00d1b0b328ae532fda9720c771
MD5 SHA1 SHA512

Score

10^/10

vidar 937 discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

40.4

Botnet

937

C2

https://romkaxarit.tumblr.com/

Attributes

profile_id
937

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/3332-115-0x0000000004860000-0x0000000004933000-memory.dmp	family_vidar
behavioral2/memory/3332-116-0x0000000000400000-0x0000000002BB0000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.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	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2312	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3744	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	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3744	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3332 wrote to memory of 2572	3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe	79
PID 3332 wrote to memory of 2572	3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe	79
PID 3332 wrote to memory of 2572	3332	78c06b9a03f2d8fcb86e7e0a8cedb5da.exe	79
PID 2572 wrote to memory of 3744	2572	cmd.exe	81
PID 2572 wrote to memory of 3744	2572	cmd.exe	81
PID 2572 wrote to memory of 3744	2572	cmd.exe	81
PID 2572 wrote to memory of 2312	2572	cmd.exe	82
PID 2572 wrote to memory of 2312	2572	cmd.exe	82
PID 2572 wrote to memory of 2312	2572	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\78c06b9a03f2d8fcb86e7e0a8cedb5da.exe
"C:\Users\Admin\AppData\Local\Temp\78c06b9a03f2d8fcb86e7e0a8cedb5da.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 78c06b9a03f2d8fcb86e7e0a8cedb5da.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\78c06b9a03f2d8fcb86e7e0a8cedb5da.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 78c06b9a03f2d8fcb86e7e0a8cedb5da.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3744
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:2312