stealc | 319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86

Analysis

max time kernel
133s
max time network
126s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
27/06/2024, 15:53

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General

Target
319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe
Size 1.5MB
Sample240627-tbsb2aydkc
SHA256 319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86
MD5 b1c2fb0d3644cf18798ad95a7238be53
SHA1 108cb5fdd73672889bce7ff1b472730881a440ab
SHA512 9d062a2a85074226f4173860cd5da2c211ff2c7da08255d2819b72c9d51d284e925d2047f55095d7425f9e8189f13b30ad4bb6c06ab024a8e33ce239d23379c7
SSDEEP 24576:IXc46Crf8fAtacHps+/qASfmBgXk/xrADOv1xvF87hso8bTTXo:IXl8ItHHO+SASagXkJr4MDkhs9g
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc default discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://68.183.108.129

Attributes

url_path
/6259fdc16222e061.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc

Executes dropped EXE 1 IoCs

pid	Process
804	kat4B32.tmp

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 2440 set thread context of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4760	804	WerFault.exe	76

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	kat4B32.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4B32.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
804	kat4B32.tmp
804	kat4B32.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76
PID 2440 wrote to memory of 804	2440	319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe	76

C:\Users\Admin\AppData\Local\Temp\319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe
"C:\Users\Admin\AppData\Local\Temp\319d70bb392da3f0b04ac0e8ff7ee515914b1ada3f696da0c3ac0fd8d1217e86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\kat4B32.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4B32.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:804
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 804 -s 1096
    3⤵
    - Program crash
    PID:4760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 804 -ip 804
1⤵
PID:4972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

kat4B32.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat4B32.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/804-8-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-4-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-10-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-11-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-13-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-15-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-17-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-19-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/804-21-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2440-0-0x00000000022E0000-0x00000000022E1000-memory.dmp

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memory/2440-9-0x0000000000400000-0x0000000000582000-memory.dmp

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memory/2440-1-0x0000000003FD0000-0x00000000040D4000-memory.dmp

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