stealc | 4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182

Analysis

max time kernel
43s
max time network
52s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
25/06/2024, 15:23

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General

Target
4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe
Size 2.2MB
Sample240625-ssrw6a1apj
SHA256 4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182
MD5 b41afad910df32a3ca31138874164550
SHA1 560bbf1e0c30cedd8e2eeab200b5b6aea360f406
SHA512 0799354e7fa3fa874f287f73828effc442fa3bf95dc23a0c7f6f8e3002f709ee4c1c764e395ea3c137fcbef9302d27acf4c19119381559a985f05fd33bf0a9d7
SSDEEP 49152:lAgY7fvVtbBaxmcqMTBeO+KQl+bH4JbjzzEBETT29YMST:llY7nTMBTBeO+KQl+bYxzIBA6uMST
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/3840-1-0x00000000040D0000-0x00000000041E0000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4136-17-0x0000000000400000-0x0000000000648000-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
4136	kat69A7.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 3840 set thread context of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78

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	kat69A7.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat69A7.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
5080	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4136	kat69A7.tmp
4136	kat69A7.tmp
4136	kat69A7.tmp
4136	kat69A7.tmp
4136	kat69A7.tmp
4136	kat69A7.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 3840 wrote to memory of 4136	3840	4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe	78
PID 4136 wrote to memory of 3588	4136	kat69A7.tmp	80
PID 4136 wrote to memory of 3588	4136	kat69A7.tmp	80
PID 4136 wrote to memory of 3588	4136	kat69A7.tmp	80
PID 3588 wrote to memory of 5080	3588	cmd.exe	82
PID 3588 wrote to memory of 5080	3588	cmd.exe	82
PID 3588 wrote to memory of 5080	3588	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe
"C:\Users\Admin\AppData\Local\Temp\4d5cce26738b7c3d5d3f69af462433b0dfcb54d9a5114e9259b9b4debecb6182.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3840
- C:\Users\Admin\AppData\Local\Temp\kat69A7.tmp
  C:\Users\Admin\AppData\Local\Temp\kat69A7.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4136
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat69A7.tmp" & rd /s /q "C:\ProgramData\AFHDAKJKFCFB" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3588
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:5080

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

kat69A7.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat69A7.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/3840-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

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memory/3840-1-0x00000000040D0000-0x00000000041E0000-memory.dmp

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memory/3840-9-0x0000000000400000-0x0000000000641000-memory.dmp

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memory/4136-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4136-17-0x0000000000400000-0x0000000000648000-memory.dmp

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