stealc | bfc092b384976e97153bae0e29359461bfd65fce5ad8188d6460de57bc680eaf

Analysis

max time kernel
133s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02-08-2024 18:52

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General

Target

1/0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe
Size

389KB
MD5

35a50d146a389289bf8cf8ae60c9e785
SHA1

eb94502d25789eb86dc160c2bc9be4b4a64131bd
SHA256

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791
SHA512

9bfe09f5165fd43579d87f229ba4a17cc8af8d7fc50ed629de3ec93e1b8d94d9c6aac17f7a429b401f332623cef2178f0d0f1930b674cf1061d24225e5427ada
SSDEEP

6144:blwLkykiFkeLnCUcx/IcoN6OpMW6rTBwEBKI7MUYbuYg785zg2di8DEO:bRiFHnC5m2TB+I70678dXi8DEO

Score

10^/10

stealc default discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://85.28.47.101

Attributes

url_path
/f3ee98d7eec07fb9.php

Signatures

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

Processes:

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe

description	pid	process	target process
PID 3612 set thread context of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1508 5060 WerFault.exe RegAsm.exe

pid	pid_target	process	target process
1508	5060	WerFault.exe	RegAsm.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exeRegAsm.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

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

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegAsm.exe

pid process

5060 RegAsm.exe
5060 RegAsm.exe

pid	process
5060	RegAsm.exe
5060	RegAsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe

description	pid	process	target process
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 3612 wrote to memory of 5060	3612	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\1\0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe
"C:\Users\Admin\AppData\Local\Temp\1\0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:5060
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5060 -s 828
    3⤵
    - Program crash
    PID:1508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 5060 -ip 5060
1⤵
PID:3720

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3612-0-0x0000000001330000-0x0000000001331000-memory.dmp

Filesize
4KB

Download
memory/5060-1-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/5060-3-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/5060-4-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/5060-5-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/5060-6-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download