stealc | 4768efd3769c4525cb2230482561c0fb0df37802d247f0bfea1f713a8561ad61

General

Target

ea21f591a31754a8d327f905bccfca2f.exe
Size

364KB
MD5

ea21f591a31754a8d327f905bccfca2f
SHA1

576b00213e4c05a4a4fdad1b54d9e6ce725b4f5f
SHA256

4768efd3769c4525cb2230482561c0fb0df37802d247f0bfea1f713a8561ad61
SHA512

d9ba855b9c9a4344e6c4d584de2962f2e1175a2c98095dde389ce41e8a8b9211b16cc3a0862c86e2f35e7923cf3699d2ca5e1558aa40fb9d65e70a8b731c3670
SSDEEP

6144:RDKW1Fgbdl0TBBvjc/9gcrPhMINuFdGohgvwhGRz4JDw+mbIpKXJsg+TW:hh1Fk70TnvjcFPOINuXGjiGl4JcPbIYT

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://216.98.9.109

Attributes

url_path
/76249dc8768da895.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

2432 RegAsm.exe
2432 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

Processes:

ea21f591a31754a8d327f905bccfca2f.exe

description pid process target process

PID 4792 set thread context of 2432 4792 ea21f591a31754a8d327f905bccfca2f.exe RegAsm.exe

pid	process
2432	RegAsm.exe
2432	RegAsm.exe

description	pid	process	target process
PID 4792 set thread context of 2432	4792	ea21f591a31754a8d327f905bccfca2f.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

2432 RegAsm.exe
2432 RegAsm.exe
2432 RegAsm.exe
2432 RegAsm.exe

pid	process
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

ea21f591a31754a8d327f905bccfca2f.exe

description	pid	process	target process
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe
PID 4792 wrote to memory of 2432	4792	ea21f591a31754a8d327f905bccfca2f.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\ea21f591a31754a8d327f905bccfca2f.exe
"C:\Users\Admin\AppData\Local\Temp\ea21f591a31754a8d327f905bccfca2f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4792

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:2432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

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/2432-17-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2432-9-0x0000000000400000-0x0000000000647000-memory.dmp

Filesize
2.3MB

Download
memory/2432-85-0x0000000000400000-0x0000000000647000-memory.dmp

Filesize
2.3MB

Download
memory/2432-15-0x0000000000400000-0x0000000000647000-memory.dmp

Filesize
2.3MB

Download
memory/2432-12-0x0000000000400000-0x0000000000647000-memory.dmp

Filesize
2.3MB

Download
memory/4792-13-0x0000000002680000-0x0000000004680000-memory.dmp

Filesize
32.0MB

Download
memory/4792-6-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/4792-3-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/4792-16-0x00000000750E0000-0x0000000075890000-memory.dmp

Filesize
7.7MB

Download
memory/4792-5-0x00000000050F0000-0x000000000512E000-memory.dmp

Filesize
248KB

Download
memory/4792-2-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/4792-0-0x0000000002440000-0x0000000002480000-memory.dmp

Filesize
256KB

Download
memory/4792-1-0x00000000750E0000-0x0000000075890000-memory.dmp

Filesize
7.7MB

Download
memory/4792-4-0x0000000004B00000-0x00000000050A4000-memory.dmp

Filesize
5.6MB

Download

Analysis

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