vidar | e3772dff75f0c54d488300728db28432abacffff7485f8da1b05a3f7cf0bc0ae

General

Target

f3499257cbdf648dcc3c1a25bbf5d61d.exe
Size

663KB
MD5

f3499257cbdf648dcc3c1a25bbf5d61d
SHA1

5cd11a0ff628ec90334976be4d188299f171360b
SHA256

e3772dff75f0c54d488300728db28432abacffff7485f8da1b05a3f7cf0bc0ae
SHA512

6721e5b34e9eca5431f0dba53e7e9f67a23006f0fd9445e8841b9051eb18288465fa009296230e2fa95f952d59acea4cb8dce95546a84e32c98083bfd4a572c2

Score

10^/10

vidar 1008 discovery spyware stealer suricata

Malware Config

Extracted

Family

vidar

Version

40.3

Botnet

1008

C2

https://lenko349.tumblr.com/

Attributes

profile_id
1008

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
behavioral2/memory/3976-115-0x0000000004910000-0x00000000049E3000-memory.dmp	family_vidar
behavioral2/memory/3976-116-0x0000000000400000-0x0000000002BB1000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.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	f3499257cbdf648dcc3c1a25bbf5d61d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f3499257cbdf648dcc3c1a25bbf5d61d.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2728	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
368	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	f3499257cbdf648dcc3c1a25bbf5d61d.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	f3499257cbdf648dcc3c1a25bbf5d61d.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe
3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	368	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3976 wrote to memory of 3860	3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe	79
PID 3976 wrote to memory of 3860	3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe	79
PID 3976 wrote to memory of 3860	3976	f3499257cbdf648dcc3c1a25bbf5d61d.exe	79
PID 3860 wrote to memory of 368	3860	cmd.exe	81
PID 3860 wrote to memory of 368	3860	cmd.exe	81
PID 3860 wrote to memory of 368	3860	cmd.exe	81
PID 3860 wrote to memory of 2728	3860	cmd.exe	82
PID 3860 wrote to memory of 2728	3860	cmd.exe	82
PID 3860 wrote to memory of 2728	3860	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\f3499257cbdf648dcc3c1a25bbf5d61d.exe
"C:\Users\Admin\AppData\Local\Temp\f3499257cbdf648dcc3c1a25bbf5d61d.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3976
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im f3499257cbdf648dcc3c1a25bbf5d61d.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\f3499257cbdf648dcc3c1a25bbf5d61d.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3860
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im f3499257cbdf648dcc3c1a25bbf5d61d.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:368
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:2728

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

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Downloads

memory/3976-115-0x0000000004910000-0x00000000049E3000-memory.dmp

Filesize
844KB

Download
memory/3976-116-0x0000000000400000-0x0000000002BB1000-memory.dmp

Filesize
39.7MB

Download

Analysis

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