stealc | d929db0b4de9bed4c0750ad10440c81484f64e1f308689c0c56cdbe1bfe63b39

Analysis

max time kernel
132s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
14-05-2024 15:42

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General

Target

a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe
Size

372KB
MD5

7fea6ee2fa2a48b8b3cf29be33437d43
SHA1

01eb4c37f826237968eb0a4a1d321480ef018fb9
SHA256

a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea
SHA512

6c2c96efd3fcbf0da5f575315aa3e963a3639807669a8403a1d1ffa39ba7f3a569394499393b08c264ebd158d7c71f5678b32fe14dedc57aa05b415bf7e87684
SSDEEP

6144:nlJwRf1g7CH4k3zaz84Je0L2HRAyghfFSKwpQ33fps211Nq+EiAPI9U5+0Xp:nX77CH4k3z28jSyglFm6s21ymtB0Xp

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://147.45.47.71

Attributes

url_path
/eb6f29c6a60b3865.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

RegAsm.exe

pid process

4640 RegAsm.exe
4640 RegAsm.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

pid	process
4640	RegAsm.exe
4640	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe

description	pid	process	target process
PID 684 set thread context of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	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 4 IoCs

Processes:

RegAsm.exe

pid process

4640 RegAsm.exe
4640 RegAsm.exe
4640 RegAsm.exe
4640 RegAsm.exe

pid	process
4640	RegAsm.exe
4640	RegAsm.exe
4640	RegAsm.exe
4640	RegAsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe

description	pid	process	target process
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe
PID 684 wrote to memory of 4640	684	a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe
"C:\Users\Admin\AppData\Local\Temp\a228d772653c687276cdf5b1bc02ef2c37eb367c1d2dbdef0e221c3b16ce87ea.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:684

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4640

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

Replay Monitor

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Downloads

C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/684-0-0x0000000000FF0000-0x0000000000FF1000-memory.dmp

Filesize
4KB

Download
memory/684-1-0x0000000000FF0000-0x0000000000FF1000-memory.dmp

Filesize
4KB

Download
memory/684-3-0x0000000000FF0000-0x0000000000FF1000-memory.dmp

Filesize
4KB

Download
memory/4640-2-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4640-5-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4640-6-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4640-7-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4640-75-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download