stealc | 9d4fa0efa1d9bc33b44dddd6b553057240e32ef8b9bfd22761c1a2423cf34c6c

General

Target

C4LEKI3Q.exe
Size

206KB
MD5

4baa40c44c5e8b662b9bcb15495f7ea7
SHA1

cd51ef773947cbe51d046af337564d20a6b15796
SHA256

9d4fa0efa1d9bc33b44dddd6b553057240e32ef8b9bfd22761c1a2423cf34c6c
SHA512

d474cc14e6d06028fa889fe1f2df2945f4dddb6b5d9cd4618e204c59159daeba11addbff8d766b0d4bea71876cd88d911a08c00c5c0814aeca916391bbd223d4
SSDEEP

3072:bu304GAUMd+w0SLHp4o6njQJp2m2ostoRfAI3iuaU9tRHcrolKYzEO:C304GApg2p/0jQJpCo9FiuaGtEO

Score

10^/10

stealc soft credential_access discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

soft

C2

https://steamcommunity.com/profiles/76561198035868993

Attributes

url_path
/43e1e04e93874aba.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3760	RegAsm.exe
3760	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
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2492 set thread context of 3760	2492	C4LEKI3Q.exe	85

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	C4LEKI3Q.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	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

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

pid	Process
3760	RegAsm.exe
3760	RegAsm.exe
3760	RegAsm.exe
3760	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 4944	2492	C4LEKI3Q.exe	84
PID 2492 wrote to memory of 4944	2492	C4LEKI3Q.exe	84
PID 2492 wrote to memory of 4944	2492	C4LEKI3Q.exe	84
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85
PID 2492 wrote to memory of 3760	2492	C4LEKI3Q.exe	85

C:\Users\Admin\AppData\Local\Temp\C4LEKI3Q.exe
"C:\Users\Admin\AppData\Local\Temp\C4LEKI3Q.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:4944
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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/2492-0-0x0000000074D8E000-0x0000000074D8F000-memory.dmp

Filesize
4KB

Download
memory/2492-1-0x00000000008A0000-0x00000000008D8000-memory.dmp

Filesize
224KB

Download
memory/2492-7-0x0000000074D80000-0x0000000075530000-memory.dmp

Filesize
7.7MB

Download
memory/2492-105-0x0000000074D80000-0x0000000075530000-memory.dmp

Filesize
7.7MB

Download
memory/3760-3-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3760-6-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3760-8-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3760-24-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3760-104-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing