stealc | 1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42

General

Target
1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe
Size 413KB
Sample240606-2rfl6sec23
SHA256 1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42
MD5 5f7324abc929cdf64e87149e4a8768eb
SHA1 932c1e1901fb28eefd389d7abbee7b90d8f28f02
SHA512 6a8ec8ae6e0f1cf07f91df82234441ada0c099e2fa80ba2edce550364848c3597659c03828793e1607fc0f12c370c5fc97b08442aec2a027274b9de5b3dd7581
SSDEEP 12288:agOAzrgCIH1DmvQ81AEFinIMAhZDG/eIY3GIiDEO:agOIcCIVw1AoiCnO43GIIt
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek
https://steamcommunity.com/profiles/76561199695752269

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/4516-1-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-5-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-6-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-21-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-22-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-39-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-40-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-55-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4516-56-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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 3380 set thread context of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 1 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4684	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4516	RegAsm.exe
4516	RegAsm.exe
4516	RegAsm.exe
4516	RegAsm.exe
4516	RegAsm.exe
4516	RegAsm.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3380 wrote to memory of 1220	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	74
PID 3380 wrote to memory of 1220	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	74
PID 3380 wrote to memory of 1220	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	74
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 3380 wrote to memory of 4516	3380	1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe	75
PID 4516 wrote to memory of 2380	4516	RegAsm.exe	77
PID 4516 wrote to memory of 2380	4516	RegAsm.exe	77
PID 4516 wrote to memory of 2380	4516	RegAsm.exe	77
PID 2380 wrote to memory of 4684	2380	cmd.exe	79
PID 2380 wrote to memory of 4684	2380	cmd.exe	79
PID 2380 wrote to memory of 4684	2380	cmd.exe	79

C:\Users\Admin\AppData\Local\Temp\1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe
"C:\Users\Admin\AppData\Local\Temp\1c3aaf613bc3dd19508feb217795453863c6ad704336d4f598a7b3f245498c42.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3380
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:1220
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4516
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\AAFBAKECAEGC" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2380
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/3380-0-0x00000000008E0000-0x00000000008E1000-memory.dmp

Download

memory/3380-2-0x00000000008E0000-0x00000000008E1000-memory.dmp

Download

memory/4516-1-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-5-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-6-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-21-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-22-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-24-0x0000000019550000-0x00000000197AF000-memory.dmp

Download

memory/4516-39-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-40-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-55-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/4516-56-0x0000000000400000-0x0000000000649000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads