stealc | 48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49

General

Target
48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe
Size 412KB
Sample240616-bhck2ssgla
SHA256 48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49
MD5 199b3fac9ac583cee18d6967a14ad6f4
SHA1 71875ea5dbd2ed7e16b34476e1f05fcbe164603d
SHA512 b00cd6e4fa3764c0a7a9a3c1f2648a49f6281979f7f574fa7639d721c11aa0e8fc2ab0f1d29070bee5f4db20f92bf78104bf0b05bfe6fde2db501e36816bb488
SSDEEP 6144:z2DUGv8rrPDXLU7nUp57KPBOgssDeKBQhkldbUu+fVDF9w9fdtE/fEwqGS:z2xv8rjDT7cWsDVQhkldbEo9VYRS
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/memve4erin
https://steamcommunity.com/profiles/76561199699680841

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 5 IoCs

stealer

resource	yara_rule
behavioral2/memory/2320-1-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2320-3-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2320-5-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2320-6-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2320-7-0x0000000000400000-0x0000000000648000-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

Detects Windows executables referencing non-Windows User-Agents 5 IoCs

resource	yara_rule
behavioral2/memory/2320-1-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2320-3-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2320-5-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2320-6-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2320-7-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 5 IoCs

resource	yara_rule
behavioral2/memory/2320-1-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2320-3-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2320-5-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2320-6-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2320-7-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 5 IoCs

resource	yara_rule
behavioral2/memory/2320-1-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2320-3-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2320-5-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2320-6-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2320-7-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	RegAsm.exe

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
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 4516 set thread context of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82

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
2876	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2320	RegAsm.exe
2320	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 4516 wrote to memory of 2320	4516	48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe	82
PID 2320 wrote to memory of 1936	2320	RegAsm.exe	87
PID 2320 wrote to memory of 1936	2320	RegAsm.exe	87
PID 2320 wrote to memory of 1936	2320	RegAsm.exe	87
PID 1936 wrote to memory of 2876	1936	cmd.exe	89
PID 1936 wrote to memory of 2876	1936	cmd.exe	89
PID 1936 wrote to memory of 2876	1936	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe
"C:\Users\Admin\AppData\Local\Temp\48bc1d427c46a8e213d03ce347162f3fd2076766ddff3e70bd52b95f967e8e49.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4516
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" & rd /s /q "C:\ProgramData\JDGCGDBGCAAE" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:2876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2320-1-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2320-3-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2320-5-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2320-6-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2320-7-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/4516-0-0x0000000000830000-0x0000000000831000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads