stealc | 7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684

General

Target

7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe
Size

1.6MB
MD5

e9498b52baf11773f6ef73b3bd119234
SHA1

c8247c9d541556bf9f8690b870d8a01bd2b7fe78
SHA256

7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684
SHA512

eca27b8a94d81c8ec82ee2e81e80fce40b1737b7ab3a421b9679c6b63fc446bd97218ac5fa96a2b2858b3f69cecd720844e452053537438d1ad878cf4622114f
SSDEEP

24576:spM5863IGfTAVpalBfUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BfUkxVVChjHZQs

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
behavioral1/memory/3548-1-0x0000000003F80000-0x0000000004090000-memory.dmp	family_vidar_v7
behavioral1/memory/512-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/512-15-0x0000000000400000-0x0000000000648000-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

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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	kat61F6.tmp

Executes dropped EXE 1 IoCs

pid	Process
512	kat61F6.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 3548 set thread context of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80

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	kat61F6.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4548	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
512	kat61F6.tmp
512	kat61F6.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 3548 wrote to memory of 512	3548	7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe	80
PID 512 wrote to memory of 3700	512	kat61F6.tmp	82
PID 512 wrote to memory of 3700	512	kat61F6.tmp	82
PID 512 wrote to memory of 3700	512	kat61F6.tmp	82
PID 3700 wrote to memory of 4548	3700	cmd.exe	84
PID 3700 wrote to memory of 4548	3700	cmd.exe	84
PID 3700 wrote to memory of 4548	3700	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe
"C:\Users\Admin\AppData\Local\Temp\7c6b9dc5f8cccee32cb9ee0d1d31f3d7a75184a8347b2ca68dc3523d94226684.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3548
- C:\Users\Admin\AppData\Local\Temp\kat61F6.tmp
  C:\Users\Admin\AppData\Local\Temp\kat61F6.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:512
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat61F6.tmp" & rd /s /q "C:\ProgramData\KFIDBAFHCAKF" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3700
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4548

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

C:\Users\Admin\AppData\Local\Temp\kat61F6.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/512-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/512-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3548-0-0x0000000000750000-0x0000000000751000-memory.dmp

Filesize
4KB

Download
memory/3548-1-0x0000000003F80000-0x0000000004090000-memory.dmp

Filesize
1.1MB

Download
memory/3548-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads