vidar | 81f0ea7ee9873de0118f7a630ea06da4072c8bd582ed4dc753a0124e1adb1584

General

Target
b145481b3a46c0e94f36eb367b4fb547.exe
Size 502KB
Sample210728-8eb693hafn
SHA256 81f0ea7ee9873de0118f7a630ea06da4072c8bd582ed4dc753a0124e1adb1584
MD5 b145481b3a46c0e94f36eb367b4fb547
SHA1 2206daf1a6e4ff8706df648888caa3bdbe5a8d6e
SHA512 272a600c0586ef8525ad5c5c5698afbe35c65d7f9d2bb8222ba372077dc095e3159b5a973f190d67dc6e36bb56c76770f21ec36748ca18dab95c74273d0de1e3
MD5 SHA1 SHA512

Score

10^/10

vidar 921 discovery spyware stealer suricata

Malware Config

Extracted

Family

vidar

Version

39.7

Botnet

921

C2

https://shpak125.tumblr.com/

Attributes

profile_id
921

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
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata

Vidar Stealer 3 IoCs

stealer

resource	yara_rule
behavioral2/memory/1492-120-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/1492-121-0x000000000046B76D-mapping.dmp	family_vidar
behavioral2/memory/1492-122-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.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 784 set thread context of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78

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	b145481b3a46c0e94f36eb367b4fb547.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b145481b3a46c0e94f36eb367b4fb547.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2948	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2216	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	b145481b3a46c0e94f36eb367b4fb547.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	b145481b3a46c0e94f36eb367b4fb547.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe
1492	b145481b3a46c0e94f36eb367b4fb547.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	784	b145481b3a46c0e94f36eb367b4fb547.exe
Token: SeDebugPrivilege	2216	taskkill.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 784 wrote to memory of 1492	784	b145481b3a46c0e94f36eb367b4fb547.exe	78
PID 1492 wrote to memory of 8	1492	b145481b3a46c0e94f36eb367b4fb547.exe	79
PID 1492 wrote to memory of 8	1492	b145481b3a46c0e94f36eb367b4fb547.exe	79
PID 1492 wrote to memory of 8	1492	b145481b3a46c0e94f36eb367b4fb547.exe	79
PID 8 wrote to memory of 2216	8	cmd.exe	82
PID 8 wrote to memory of 2216	8	cmd.exe	82
PID 8 wrote to memory of 2216	8	cmd.exe	82
PID 8 wrote to memory of 2948	8	cmd.exe	84
PID 8 wrote to memory of 2948	8	cmd.exe	84
PID 8 wrote to memory of 2948	8	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\b145481b3a46c0e94f36eb367b4fb547.exe
"C:\Users\Admin\AppData\Local\Temp\b145481b3a46c0e94f36eb367b4fb547.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:784
- C:\Users\Admin\AppData\Local\Temp\b145481b3a46c0e94f36eb367b4fb547.exe
  C:\Users\Admin\AppData\Local\Temp\b145481b3a46c0e94f36eb367b4fb547.exe
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /im b145481b3a46c0e94f36eb367b4fb547.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b145481b3a46c0e94f36eb367b4fb547.exe" & del C:\ProgramData\*.dll & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:8
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /im b145481b3a46c0e94f36eb367b4fb547.exe /f
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2216
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 6
      4⤵
      Delays execution with timeout.exe
      PID:2948

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

Modify Registry

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/784-119-0x0000000004E50000-0x0000000004E51000-memory.dmp

Download

memory/784-114-0x0000000000460000-0x0000000000461000-memory.dmp

Download

memory/784-118-0x0000000004E90000-0x0000000004E91000-memory.dmp

Download

memory/784-117-0x00000000027F0000-0x00000000027FE000-memory.dmp

Download

memory/784-116-0x0000000004F40000-0x0000000004F41000-memory.dmp

Download

memory/1492-122-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/1492-120-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads