stealc | fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
28/06/2024, 03:36

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General

Target
fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe
Size 1.5MB
Sample240628-d58ywasaml
SHA256 fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3
MD5 6194348547b9aa2632aa2bdc5f48a9e5
SHA1 21b4209d3a1a3f92cdc15e028640c7f403247554
SHA512 d69991bbb9a23cd15d4f0129e93ca336c6595479d0999d14a274090cc63de91eba61366664d409c3f87108bfee8be26107f346e68afe1b6d053dccac88529ac8
SSDEEP 24576:BXc46Crf8fyHacHps+/qASfmBgXk/xrADOv1xvF87uLwmnq:BXl8aHHHO+SASagXkJr4MDkUwm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

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 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/1548-1-0x0000000003FB0000-0x00000000040C0000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-17-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
2792	kat7B4A.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
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 1548 set thread context of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77

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	kat7B4A.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7B4A.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3104	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2792	kat7B4A.tmp
2792	kat7B4A.tmp
2792	kat7B4A.tmp
2792	kat7B4A.tmp
2792	kat7B4A.tmp
2792	kat7B4A.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 1548 wrote to memory of 2792	1548	fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe	77
PID 2792 wrote to memory of 420	2792	kat7B4A.tmp	79
PID 2792 wrote to memory of 420	2792	kat7B4A.tmp	79
PID 2792 wrote to memory of 420	2792	kat7B4A.tmp	79
PID 420 wrote to memory of 3104	420	cmd.exe	81
PID 420 wrote to memory of 3104	420	cmd.exe	81
PID 420 wrote to memory of 3104	420	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe
"C:\Users\Admin\AppData\Local\Temp\fe35cc93ffa8ef0801847449c1a0047da244da6995b1bfd22719e8a0ea63d3e3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Users\Admin\AppData\Local\Temp\kat7B4A.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7B4A.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7B4A.tmp" & rd /s /q "C:\ProgramData\FCGIJDBAFCBA" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:420
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:3104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

kat7B4A.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat7B4A.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

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memory/1548-0-0x00000000023C0000-0x00000000023C1000-memory.dmp

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memory/1548-1-0x0000000003FB0000-0x00000000040C0000-memory.dmp

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memory/1548-9-0x0000000000400000-0x000000000058E000-memory.dmp

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memory/2792-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2792-17-0x0000000000400000-0x0000000000648000-memory.dmp

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