stealc | b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48

Analysis

max time kernel
140s
max time network
131s
platform
windows10-1703_x64
resource
win10-20231023-en
resource tags

arch:x64arch:x86image:win10-20231023-enlocale:en-usos:windows10-1703-x64system
submitted
23-10-2023 16:41

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General

Target

b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe
Size

1.4MB
MD5

c6bd4410a4201fd49a8d399f10dd8ecf
SHA1

3b9b4c490fc80d4ed7d1c9c7f8dafc19cb7764b6
SHA256

b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48
SHA512

5ddd989afc6ff64dbf03466a219e3ba71906939c74c8833b20bb70bd86c0a28d45e621a15a4a6ec09071f55c930b42e2a64877135a31c9f5ed2e09e5cda0e093
SSDEEP

12288:bRgcdrhCHwfbv7rHMUtXe44Lzynevtxn+9WXH3ML:bmqewfbv7IwOlLzynevtxmWXH8

Score

10^/10

stealc discovery stealer

Malware Config

Extracted

Family

stealc

http://tetromask.site

Attributes

url_path
/b5c586aec2e1004c.php

rc4.plain

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

Program crash 4 IoCs

pid	pid_target	Process	procid_target
2596	2820	WerFault.exe	70
212	2820	WerFault.exe	70
5056	2820	WerFault.exe	70
2372	2820	WerFault.exe	70

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	b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2820	b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe
2820	b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe

C:\Users\Admin\AppData\Local\Temp\b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe
"C:\Users\Admin\AppData\Local\Temp\b5b9d5725aa9ad9330523f70aa467e27ac2c0b6ec34f993393b30afea703dd48.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2820 -s 1212
  2⤵
  - Program crash
  PID:2596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2820 -s 1252
  2⤵
  - Program crash
  PID:212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2820 -s 1208
  2⤵
  - Program crash
  PID:5056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2820 -s 1240
  2⤵
  - Program crash
  PID:2372

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

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Downloads

memory/2820-0-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2820-1-0x0000000002830000-0x0000000002928000-memory.dmp

Filesize
992KB

Download
memory/2820-2-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download
memory/2820-3-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2820-4-0x0000000010000000-0x0000000010164000-memory.dmp

Filesize
1.4MB

Download
memory/2820-5-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download