vidar | a6a4ea6a622b43f7f7b866d147b70db495c7595ce85895c55e5a2b9fbf4291a2

General

Target
c872858300f0be9b70ac56056032736d.exe
Size 630KB
Sample210915-mq4kaaaec9
SHA256 a6a4ea6a622b43f7f7b866d147b70db495c7595ce85895c55e5a2b9fbf4291a2
MD5 c872858300f0be9b70ac56056032736d
SHA1 b01228fa5416dc0eab9e5534695235d504610643
SHA512 015bf058897eaa304ac6578de73c0061f470706d0827e4c7137f242c187ba02bd6c2b569a52fe8a9e75df237707afde2d6b563a8bf8200e0eaed0497df0a380b
MD5 SHA1 SHA512

Score

10^/10

vidar 1008 discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

40.6

Botnet

1008

C2

https://dimonbk83.tumblr.com/

Attributes

profile_id
1008

Signatures

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

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/3176-115-0x0000000003E90000-0x0000000003F64000-memory.dmp	family_vidar
behavioral2/memory/3176-116-0x0000000000400000-0x00000000021BC000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.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	c872858300f0be9b70ac56056032736d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	c872858300f0be9b70ac56056032736d.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2600	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
656	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	c872858300f0be9b70ac56056032736d.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	c872858300f0be9b70ac56056032736d.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe
3176	c872858300f0be9b70ac56056032736d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	656	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3176 wrote to memory of 4012	3176	c872858300f0be9b70ac56056032736d.exe	69
PID 3176 wrote to memory of 4012	3176	c872858300f0be9b70ac56056032736d.exe	69
PID 3176 wrote to memory of 4012	3176	c872858300f0be9b70ac56056032736d.exe	69
PID 4012 wrote to memory of 656	4012	cmd.exe	71
PID 4012 wrote to memory of 656	4012	cmd.exe	71
PID 4012 wrote to memory of 656	4012	cmd.exe	71
PID 4012 wrote to memory of 2600	4012	cmd.exe	72
PID 4012 wrote to memory of 2600	4012	cmd.exe	72
PID 4012 wrote to memory of 2600	4012	cmd.exe	72

C:\Users\Admin\AppData\Local\Temp\c872858300f0be9b70ac56056032736d.exe
"C:\Users\Admin\AppData\Local\Temp\c872858300f0be9b70ac56056032736d.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im c872858300f0be9b70ac56056032736d.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\c872858300f0be9b70ac56056032736d.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im c872858300f0be9b70ac56056032736d.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:656
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:2600