stealc | 2c32eace1b05663b289ea1ac4dc8a8934d693ee1fc1e178ed1f8052dbb3f3b98

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
07/01/2024, 04:26

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General

Target
timeSync.exe
Size 304KB
Sample240107-e2hsysfed7
SHA256 2c32eace1b05663b289ea1ac4dc8a8934d693ee1fc1e178ed1f8052dbb3f3b98
MD5 dc76a93f65c8adbdcb788680cf0c0950
SHA1 8b9fb02052dda3350f18c7c2d848a89e3ae26c30
SHA512 4502efe37c8fb72a9db9f2c072d7cd1cbe96f1d6a1c0a65ee1dc2ad708645c86d2dddb7c129c1bcfa3ca011dfdb2818324aefcec9e7c9d72b5211d0a267d4b44
SSDEEP 3072:68lLLOIPrkS7rJikDHP7+F/pwtH9RAeZZSVyLMsFofMD2UkaR/9SJ5fTK7KVDrcz:68lLHDkSJ7XheVyoPIkrfTgYn79o6q
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://5.42.64.41

Attributes

url_path
/40d570f44e84a454.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1500	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2764	timeSync.exe
2764	timeSync.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1348	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2764	timeSync.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 1500	2764	timeSync.exe	31
PID 2764 wrote to memory of 1500	2764	timeSync.exe	31
PID 2764 wrote to memory of 1500	2764	timeSync.exe	31
PID 2764 wrote to memory of 1500	2764	timeSync.exe	31
PID 1500 wrote to memory of 1348	1500	cmd.exe	33
PID 1500 wrote to memory of 1348	1500	cmd.exe	33
PID 1500 wrote to memory of 1348	1500	cmd.exe	33
PID 1500 wrote to memory of 1348	1500	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\timeSync.exe
"C:\Users\Admin\AppData\Local\Temp\timeSync.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\timeSync.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1500
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2764-2-0x0000000000220000-0x000000000023C000-memory.dmp

Download

memory/2764-1-0x0000000000790000-0x0000000000890000-memory.dmp

Download

memory/2764-3-0x0000000000400000-0x000000000062E000-memory.dmp

Download

memory/2764-4-0x0000000000400000-0x000000000062E000-memory.dmp

Download

memory/2764-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Download

memory/2764-40-0x0000000000400000-0x000000000062E000-memory.dmp

Download

memory/2764-65-0x0000000000790000-0x0000000000890000-memory.dmp

Download

memory/2764-66-0x0000000000400000-0x000000000062E000-memory.dmp

Download

memory/2764-75-0x0000000000400000-0x000000000062E000-memory.dmp

Download

memory/2764-76-0x0000000000400000-0x000000000062E000-memory.dmp

Download

memory/2764-77-0x0000000000790000-0x0000000000890000-memory.dmp

Download