stealc | de35d4193e3e6b9410a748c59bb2e0fc84ea2a3f16cc8d9d1d598fb32f0f0d4c

Analysis

max time kernel
121s
max time network
128s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
26/08/2024, 12:44

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General

Target
file.exe
Size 3.3MB
Sample240826-pygftstgpd
SHA256 de35d4193e3e6b9410a748c59bb2e0fc84ea2a3f16cc8d9d1d598fb32f0f0d4c
MD5 865adfa302bfc57219c6541aebbfa1c9
SHA1 aeeb2cdc6cdd99705094904fdf65f52910e8fb89
SHA512 fb6a9dd9d66013e2274adca885b3d0f038aa14cf4a64bac2140203ff72d2091e71c6929d3748af6e999c9b1c95098036489568ac8c40032bc819d917a4e87b38
SSDEEP 49152:DYAvCZL5b7FsC5+zyeT+rvS4C/Mglv5/NhRZhRlUH:D9vCBxZeT+rvTC/Mgl5/NPZhRlUH
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc w9 discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

http://193.176.190.41

Attributes

url_path
/2fa883eebd632382.php

Signatures

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

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral1/memory/2232-1-0x0000000000950000-0x0000000000CA6000-memory.dmp	net_reactor

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2232 set thread context of 2780	2232	file.exe	31

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2844	2780	WerFault.exe	31

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2232	file.exe
2232	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	file.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2764	2232	file.exe	30
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2232 wrote to memory of 2780	2232	file.exe	31
PID 2780 wrote to memory of 2844	2780	RegAsm.exe	32
PID 2780 wrote to memory of 2844	2780	RegAsm.exe	32
PID 2780 wrote to memory of 2844	2780	RegAsm.exe	32
PID 2780 wrote to memory of 2844	2780	RegAsm.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2764
- 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
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2780 -s 252
    3⤵
    - Program crash
    PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2232-0-0x0000000074ADE000-0x0000000074ADF000-memory.dmp

Download

memory/2232-1-0x0000000000950000-0x0000000000CA6000-memory.dmp

Download

memory/2232-2-0x0000000074AD0000-0x00000000751BE000-memory.dmp

Download

memory/2232-3-0x00000000044D0000-0x0000000004606000-memory.dmp

Download

memory/2232-4-0x0000000000600000-0x0000000000622000-memory.dmp

Download

memory/2232-18-0x0000000074AD0000-0x00000000751BE000-memory.dmp

Download

memory/2780-6-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-7-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-9-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-15-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-13-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Download

memory/2780-10-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-17-0x0000000000400000-0x0000000000643000-memory.dmp

Download

memory/2780-5-0x0000000000400000-0x0000000000643000-memory.dmp

Download