stealc | 2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93

General

Target
2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe
Size 461KB
Sample240613-2mgnnstcmc
SHA256 2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93
MD5 c0a99bc314392ebe539fa8b4743913ab
SHA1 4e8266d9483b733bc36f5074cddebce42a2eb916
SHA512 23b08b82c24a79dcb0c03d545c61bb413ef4c5005748388dbe2196d5088ab7fe2612640c6902bf2e9b5608277c216c3163bbe264b8e7b4ca476fcc655c355385
SSDEEP 12288:Byj0tfK+HwRxac/ljiRfxnPbGex36yY4fcEO:c7+HEMJ1Ge16ytfct
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/r8z0l
https://steamcommunity.com/profiles/76561199698764354

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/672-1-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-3-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-5-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-18-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-19-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-36-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-37-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-52-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/672-53-0x0000000000400000-0x0000000000648000-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 1300 set thread context of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70

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
1716	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
672	RegAsm.exe
672	RegAsm.exe
672	RegAsm.exe
672	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 1300 wrote to memory of 672	1300	2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe	70
PID 672 wrote to memory of 204	672	RegAsm.exe	72
PID 672 wrote to memory of 204	672	RegAsm.exe	72
PID 672 wrote to memory of 204	672	RegAsm.exe	72
PID 204 wrote to memory of 1716	204	cmd.exe	74
PID 204 wrote to memory of 1716	204	cmd.exe	74
PID 204 wrote to memory of 1716	204	cmd.exe	74

C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe
"C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1300
- 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:672
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\EHIJJDGDHDGD" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:204
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:1716

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/672-1-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/672-3-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/672-5-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/672-18-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/672-19-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/672-22-0x0000000019020000-0x000000001927F000-memory.dmp

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memory/672-36-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/672-37-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/672-52-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/672-53-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1300-0-0x0000000001290000-0x0000000001291000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads