stealc | ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244

Analysis

max time kernel
133s
max time network
122s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
27/06/2024, 03:00

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General

Target
ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe
Size 1.5MB
Sample240627-dhaskasank
SHA256 ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244
MD5 eae79d75f126bc102cedea0c355609f4
SHA1 39b687c45bcbca868a703ef145a9112f37b5a42f
SHA512 c8a98ff510ed324f5bcecce81246c4886ace12b2c0c070af9011591c39e9b642c92a8893eb979db5e8eb54119fd34fc9ad6c68733d64b29b7125ea09bfaa0049
SSDEEP 24576:1K9MHjif9yvK3gBlsXbvLbLUJ70Uj654koEBETT2TjyAAk:1/jwwvKQl+bH4JbjzzEBETT2T5
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
2728	kat75FB.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 4760 set thread context of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3068	2728	WerFault.exe	77

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	kat75FB.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat75FB.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2728	kat75FB.tmp
2728	kat75FB.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77
PID 4760 wrote to memory of 2728	4760	ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe	77

C:\Users\Admin\AppData\Local\Temp\ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe
"C:\Users\Admin\AppData\Local\Temp\ec1453eef653ac9341af1890bc1a6fa2fbd7b80f6768ba6ede4f9b4430c26244.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4760
- C:\Users\Admin\AppData\Local\Temp\kat75FB.tmp
  C:\Users\Admin\AppData\Local\Temp\kat75FB.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2728
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2728 -s 1392
    3⤵
    - Program crash
    PID:3068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2728 -ip 2728
1⤵
PID:2864

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

kat75FB.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat75FB.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2728-15-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-8-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-4-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-10-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-11-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-12-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-17-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-19-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/2728-21-0x0000000000400000-0x000000000063C000-memory.dmp

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memory/4760-1-0x00000000040A0000-0x00000000041A4000-memory.dmp

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memory/4760-9-0x0000000000400000-0x0000000000584000-memory.dmp

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memory/4760-0-0x0000000002500000-0x0000000002501000-memory.dmp

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