stealc | 611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72

Analysis

max time kernel
146s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
24/06/2024, 22:06

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General

Target
611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe
Size 2.1MB
Sample240624-11ekssthqg
SHA256 611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72
MD5 668671ac4487c2fb6f69f8ee10d570bf
SHA1 1b1f2d99bc86e95921da09188b19ee0ca6ffcfb1
SHA512 05b19e8670864cc649559713ec5a93790012be03df366551b10e5b37c6e393416f787fb7e53f7c25dd3c97fb38d0ebf798931d7e55b3c0178565a6bb4b8623ab
SSDEEP 24576:cC/gyrgOo5VvmUfq+Zc1Fsuqf9s1UfMxVVtes12FxwojKr98YGeGGHzqqikY+rPN:c3xbZcjH1UkxVVChjHZQHzqZ+rPlV
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/5100-1-0x0000000004160000-0x0000000004270000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3624-17-0x0000000000400000-0x0000000000648000-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
3624	kat5515.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 5100 set thread context of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76

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	kat5515.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5515.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1448	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3624	kat5515.tmp
3624	kat5515.tmp
3624	kat5515.tmp
3624	kat5515.tmp
3624	kat5515.tmp
3624	kat5515.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 5100 wrote to memory of 3624	5100	611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe	76
PID 3624 wrote to memory of 4024	3624	kat5515.tmp	78
PID 3624 wrote to memory of 4024	3624	kat5515.tmp	78
PID 3624 wrote to memory of 4024	3624	kat5515.tmp	78
PID 4024 wrote to memory of 1448	4024	cmd.exe	80
PID 4024 wrote to memory of 1448	4024	cmd.exe	80
PID 4024 wrote to memory of 1448	4024	cmd.exe	80

C:\Users\Admin\AppData\Local\Temp\611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe
"C:\Users\Admin\AppData\Local\Temp\611b50beed9e182863dab678ad79adeb01c47636cf12c9937dfa38021d2dba72.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Users\Admin\AppData\Local\Temp\kat5515.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5515.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3624
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5515.tmp" & rd /s /q "C:\ProgramData\HIDBFCBGDBKK" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4024
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:1448

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

kat5515.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat5515.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/3624-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-9-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3624-17-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/5100-0-0x00000000025E0000-0x00000000025E1000-memory.dmp

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memory/5100-1-0x0000000004160000-0x0000000004270000-memory.dmp

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memory/5100-10-0x0000000000400000-0x0000000000624000-memory.dmp

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