stealc | bfc092b384976e97153bae0e29359461bfd65fce5ad8188d6460de57bc680eaf

Analysis

max time kernel
92s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15-07-2024 08:50

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General

Target

1/0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe
Size

389KB
MD5

35a50d146a389289bf8cf8ae60c9e785
SHA1

eb94502d25789eb86dc160c2bc9be4b4a64131bd
SHA256

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791
SHA512

9bfe09f5165fd43579d87f229ba4a17cc8af8d7fc50ed629de3ec93e1b8d94d9c6aac17f7a429b401f332623cef2178f0d0f1930b674cf1061d24225e5427ada
SSDEEP

6144:blwLkykiFkeLnCUcx/IcoN6OpMW6rTBwEBKI7MUYbuYg785zg2di8DEO:bRiFHnC5m2TB+I70678dXi8DEO

Score

10^/10

stealc default discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://85.28.47.101

Attributes

url_path
/f3ee98d7eec07fb9.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

1744 RegAsm.exe
1744 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
1744	RegAsm.exe
1744	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe

description	pid	process	target process
PID 1032 set thread context of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.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

1744 RegAsm.exe
1744 RegAsm.exe
1744 RegAsm.exe
1744 RegAsm.exe

pid	process
1744	RegAsm.exe
1744	RegAsm.exe
1744	RegAsm.exe
1744	RegAsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe

description	pid	process	target process
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe
PID 1032 wrote to memory of 1744	1032	0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\1\0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe
"C:\Users\Admin\AppData\Local\Temp\1\0e4fc438decc9723b89bd0e71b9ee30c1a8390e697d790b2d5ce96e94accd791.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1032
- 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:1744

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/1032-0-0x00000000027D0000-0x00000000027D1000-memory.dmp

Filesize
4KB

Download
memory/1744-1-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/1744-3-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/1744-4-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download
memory/1744-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1744-77-0x0000000000400000-0x000000000063C000-memory.dmp

Filesize
2.2MB

Download