stealc | 7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
26/06/2024, 11:14

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General

Target
7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe
Size 1.5MB
Sample240626-nb7ttssbnb
SHA256 7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c
MD5 02ca1ade7bd507e94dbbc6ba5bfadfc9
SHA1 67c8a94111ed5aaf797ac3824456fb3ac5a7268a
SHA512 61b509bd826bf9fb14726040078a62550343665384b3c7be93064a554deaa8a7c59aef4d136787081f1643a785a49ab8903be501c1993049b3c784bd702516f5
SSDEEP 24576:KK9MHjif9INK3gBlsXbvLbLUJ70Uj654koEBETT2f1Y+TSXjk:K/jwaNKQl+bH4JbjzzEBETT29YMST
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/4596-2-0x0000000003F70000-0x0000000004080000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2128-15-0x0000000000400000-0x0000000000648000-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
2128	kat72EE.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 4596 set thread context of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat72EE.tmp
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat72EE.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
72	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2128	kat72EE.tmp
2128	kat72EE.tmp
2128	kat72EE.tmp
2128	kat72EE.tmp
2128	kat72EE.tmp
2128	kat72EE.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 4596 wrote to memory of 2128	4596	7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe	77
PID 2128 wrote to memory of 4156	2128	kat72EE.tmp	79
PID 2128 wrote to memory of 4156	2128	kat72EE.tmp	79
PID 2128 wrote to memory of 4156	2128	kat72EE.tmp	79
PID 4156 wrote to memory of 72	4156	cmd.exe	81
PID 4156 wrote to memory of 72	4156	cmd.exe	81
PID 4156 wrote to memory of 72	4156	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe
"C:\Users\Admin\AppData\Local\Temp\7ab0943a0ce1d48cbc03d910f5e3b83799bf9b5b5c91c2c6022e0e5b3bce891c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4596
- C:\Users\Admin\AppData\Local\Temp\kat72EE.tmp
  C:\Users\Admin\AppData\Local\Temp\kat72EE.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2128
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat72EE.tmp" & rd /s /q "C:\ProgramData\HJJEGIEHIJKK" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4156
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:72

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

kat72EE.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat72EE.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/2128-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-9-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2128-15-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4596-0-0x0000000002300000-0x0000000002301000-memory.dmp

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memory/4596-2-0x0000000003F70000-0x0000000004080000-memory.dmp

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memory/4596-10-0x0000000000400000-0x0000000000590000-memory.dmp

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