vidar | 33c2ca1cc03550022c20d672a3d541cb1b1d2009458dd46493bdf950e9ddc411

General

Target
9243520e8665c620e93c10508bf2c223.exe
Size 640KB
Sample210603-ctajmfa9s6
SHA256 33c2ca1cc03550022c20d672a3d541cb1b1d2009458dd46493bdf950e9ddc411
MD5 9243520e8665c620e93c10508bf2c223
SHA1 e9d1f0a0b4e6d6e0c5e1510d426cc319fca5526c
SHA512 2684136ae58fbde8fd4bb504463c2be0a8cc80ce5d891a20b364ca8f3af3bd503417ee641cd7dfd9cc207138e2c89debfbabf28f9de4d24e3e2b238f9129e971
MD5 SHA1 SHA512

Score

10^/10

vidar 517 discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

39.2

Botnet

517

C2

https://dimashub.tumblr.com

Attributes

profile_id
517

Signatures

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

Vidar Stealer 4 IoCs

stealer

resource	yara_rule
behavioral2/memory/184-114-0x0000000000400000-0x000000000049A000-memory.dmp	family_vidar
behavioral2/memory/184-115-0x000000000046803D-mapping.dmp	family_vidar
behavioral2/memory/2256-116-0x00000000020C0000-0x0000000002157000-memory.dmp	family_vidar
behavioral2/memory/184-117-0x0000000000400000-0x000000000049A000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77

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	9243520e8665c620e93c10508bf2c223.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	9243520e8665c620e93c10508bf2c223.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3680	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2840	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	9243520e8665c620e93c10508bf2c223.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	9243520e8665c620e93c10508bf2c223.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe
184	9243520e8665c620e93c10508bf2c223.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2840	taskkill.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 2256 wrote to memory of 184	2256	9243520e8665c620e93c10508bf2c223.exe	77
PID 184 wrote to memory of 1176	184	9243520e8665c620e93c10508bf2c223.exe	79
PID 184 wrote to memory of 1176	184	9243520e8665c620e93c10508bf2c223.exe	79
PID 184 wrote to memory of 1176	184	9243520e8665c620e93c10508bf2c223.exe	79
PID 1176 wrote to memory of 2840	1176	cmd.exe	81
PID 1176 wrote to memory of 2840	1176	cmd.exe	81
PID 1176 wrote to memory of 2840	1176	cmd.exe	81
PID 1176 wrote to memory of 3680	1176	cmd.exe	82
PID 1176 wrote to memory of 3680	1176	cmd.exe	82
PID 1176 wrote to memory of 3680	1176	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\9243520e8665c620e93c10508bf2c223.exe
"C:\Users\Admin\AppData\Local\Temp\9243520e8665c620e93c10508bf2c223.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Users\Admin\AppData\Local\Temp\9243520e8665c620e93c10508bf2c223.exe
  "C:\Users\Admin\AppData\Local\Temp\9243520e8665c620e93c10508bf2c223.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:184
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /im 9243520e8665c620e93c10508bf2c223.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\9243520e8665c620e93c10508bf2c223.exe" & del C:\ProgramData\*.dll & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1176
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /im 9243520e8665c620e93c10508bf2c223.exe /f
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2840
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 6
      4⤵
      Delays execution with timeout.exe
      PID:3680