stealc | a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0

General

Target

a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe
Size

2.1MB
MD5

26178268aba099a5e9c1b0c63b84ac5e
SHA1

acac33c32048f94902e6224ee9d31a0834a673ac
SHA256

a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0
SHA512

936d6ffb8b2e9ae743b00bd4354ee3e6a34ccba326656cd282044f945d9a8dbb9323ebaf50eb4791229cba2fb4a8e644dc5056db650d1c2f238901bd55e6e5f7
SSDEEP

24576:cC/gyrgOo5VvmUfq+Zc1Fsuqf9sLUfMxVVtes12FxwojKr98YGeGGHzqqikY+rPN:c3xbZcjHLUkxVVChjHZQHzqZ+rPlV

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

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 17 IoCs

stealer

resource	yara_rule
behavioral2/memory/2040-1-0x0000000004000000-0x0000000004110000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-26-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-27-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-28-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-38-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-39-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-47-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-48-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-64-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-65-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-76-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-77-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-80-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
3336	kat45C3.tmp

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 2040 set thread context of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79

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 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	kat45C3.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat45C3.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3040	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3336	kat45C3.tmp
3336	kat45C3.tmp
3336	kat45C3.tmp
3336	kat45C3.tmp
3336	kat45C3.tmp
3336	kat45C3.tmp
3336	kat45C3.tmp
3336	kat45C3.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 2040 wrote to memory of 3336	2040	a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe	79
PID 3336 wrote to memory of 1856	3336	kat45C3.tmp	82
PID 3336 wrote to memory of 1856	3336	kat45C3.tmp	82
PID 3336 wrote to memory of 1856	3336	kat45C3.tmp	82
PID 1856 wrote to memory of 3040	1856	cmd.exe	84
PID 1856 wrote to memory of 3040	1856	cmd.exe	84
PID 1856 wrote to memory of 3040	1856	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe
"C:\Users\Admin\AppData\Local\Temp\a545672b2f596aa66356486779f19c0bbdc30a82ae11f0d598002fc7edf115c0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Users\Admin\AppData\Local\Temp\kat45C3.tmp
  C:\Users\Admin\AppData\Local\Temp\kat45C3.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3336
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat45C3.tmp" & rd /s /q "C:\ProgramData\CBAKJKJJJECF" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1856
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:3040

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat45C3.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2040-10-0x0000000000400000-0x0000000000624000-memory.dmp

Filesize
2.1MB

Download
memory/2040-1-0x0000000004000000-0x0000000004110000-memory.dmp

Filesize
1.1MB

Download
memory/2040-0-0x0000000002280000-0x0000000002281000-memory.dmp

Filesize
4KB

Download
memory/3336-28-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-39-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-26-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-27-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-30-0x000000002D150000-0x000000002D3AF000-memory.dmp

Filesize
2.4MB

Download
memory/3336-38-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-47-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-48-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-64-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-65-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-76-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3336-80-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

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