stealc | 739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
29-10-2023 08:04

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General

Target

739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe
Size

1.1MB
MD5

22ae3a0d9a13c7e8c37166ef42be3a22
SHA1

34f504062d963b7ec924854576526f35aeab746c
SHA256

739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be
SHA512

9a17b8d56e8d831262e23b2c3346ea41bd6221d348216be80e7c096fc37bf1e808005b9828dad4f3b8e765ea8b913872baf87fdc9c3442572b025781fc72e886
SSDEEP

24576:8eh4biccwWcz+9N+gigYb484ecjxJjpZ/ZA9:8j4EmZNM

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 2 IoCs

pid	pid_target	Process	procid_target
1832	3156	WerFault.exe	86
2924	3156	WerFault.exe	86

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	739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3156	739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe
3156	739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe

C:\Users\Admin\AppData\Local\Temp\739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe
"C:\Users\Admin\AppData\Local\Temp\739fd0e7383914a1b5f5e1aa49994980a19fde776ebb96797c276e47af59d3be.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3156
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3156 -s 1432
  2⤵
  - Program crash
  PID:1832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3156 -s 1428
  2⤵
  - Program crash
  PID:2924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3156 -ip 3156
1⤵
PID:4804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3156 -ip 3156
1⤵
PID:1072

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

memory/3156-0-0x00000000021A0000-0x00000000021A1000-memory.dmp

Filesize
4KB

Download
memory/3156-1-0x0000000002780000-0x00000000027AB000-memory.dmp

Filesize
172KB

Download
memory/3156-2-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download
memory/3156-3-0x00000000021A0000-0x00000000021A1000-memory.dmp

Filesize
4KB

Download
memory/3156-4-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/3156-5-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download