stealc | 95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806

Analysis

max time kernel
195s
max time network
299s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/05/2024, 23:32

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General

Target
95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe
Size 158KB
Sample240507-3jp2baec8t
SHA256 95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806
MD5 317465164f61fe462864a65b732ccc13
SHA1 5b78c41ad423766e9aadae91f902d14a922c8666
SHA512 9bc4846a92b7b25e973b42c2cd4895dd15132d0fa1d9ee62e8d7e3679e8bb3b75ae9fb5c6fa165af0f77eaf3e3f75a4d7f60057a0cb22693fc80d89390d09046
SSDEEP 3072:v5JKjGc9pOW1Bg7ayW1QSZP5+fZ1mlUQj2s:hgGGpZQao+P5KboXj2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

http://49.13.229.86

Attributes

url_path
/c73eed764cc59dcb.php

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
32	RegAsm.exe
32	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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4520 set thread context of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75

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
32	RegAsm.exe
32	RegAsm.exe
32	RegAsm.exe
32	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 316	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	74
PID 4520 wrote to memory of 316	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	74
PID 4520 wrote to memory of 316	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	74
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75
PID 4520 wrote to memory of 32	4520	95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe	75

C:\Users\Admin\AppData\Local\Temp\95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe
"C:\Users\Admin\AppData\Local\Temp\95674cb006bfca36cd0e0f9b80ef0ed240c64f2ee955d9dd4af8102a0c4d9806.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:316
- 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:32

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

mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 593KB
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
SSDEEP 12288:BlSyAom/gcRKMdRm4wFkRHuyG4RRGJVDjMk/x21R8gY/r:BKgcRKMdRm4wFkVVDGJVv//x21R8br
MD5 SHA1 SHA512 SSDEEP

Submit Download

nss3.dll

Path \ProgramData\nss3.dll
Size 2.0MB
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
SSDEEP 49152:fECf12gikHlnKGxJRIB+y5nvxnaOSJ3HFNWYrVvE4CQsgzMmQfTU1NrWmy4KoAzh:J7Tf8J1Q+SS5/nr
MD5 SHA1 SHA512 SSDEEP

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memory/32-10-0x0000000000400000-0x000000000063B000-memory.dmp

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memory/32-8-0x0000000000400000-0x000000000063B000-memory.dmp

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memory/32-4-0x0000000000400000-0x000000000063B000-memory.dmp

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memory/32-11-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/32-69-0x0000000000400000-0x000000000063B000-memory.dmp

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memory/4520-0-0x0000000073E4E000-0x0000000073E4F000-memory.dmp

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memory/4520-1-0x0000000000170000-0x000000000019E000-memory.dmp

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memory/4520-9-0x0000000073E40000-0x000000007452E000-memory.dmp

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memory/4520-70-0x0000000073E40000-0x000000007452E000-memory.dmp

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