stealc | d0a6076bc23382609a958b7d4d50a54b01d719e24bad56fa10d9da0b083349b6

General

Target

tmp.exe
Size

238KB
MD5

14a0bb0b90ac5ca064a42f889dd0492d
SHA1

119a3338e0814e9071b762d8bd5fff6ea2fda28c
SHA256

d0a6076bc23382609a958b7d4d50a54b01d719e24bad56fa10d9da0b083349b6
SHA512

024697eb4e1708781467396169c65e62fef5b8d65b7c1d434d28428ee7adf7628a92c1fe29c856fc1fde443337d2c48fdd42f304b350ee9d550e377e8e7d0a74
SSDEEP

3072:wWTAKLhXk2EzsPq6wP7EQA2OjVNqfBki6mAX7i5HHphJnOJG:kKL9EzsPd8A2DBke0MHtO

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.79

Attributes

url_path
/3886d2276f6914c4.php

rc4.plain

Signatures

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

Deletes itself 1 IoCs

pid	Process
1820	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1908	tmp.exe
1908	tmp.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	tmp.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tmp.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2748	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1908	tmp.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 1820	1908	tmp.exe	29
PID 1908 wrote to memory of 1820	1908	tmp.exe	29
PID 1908 wrote to memory of 1820	1908	tmp.exe	29
PID 1908 wrote to memory of 1820	1908	tmp.exe	29
PID 1820 wrote to memory of 2748	1820	cmd.exe	30
PID 1820 wrote to memory of 2748	1820	cmd.exe	30
PID 1820 wrote to memory of 2748	1820	cmd.exe	30
PID 1820 wrote to memory of 2748	1820	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\tmp.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1820
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2748

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

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/1908-1-0x0000000000720000-0x0000000000820000-memory.dmp

Filesize
1024KB

Download
memory/1908-2-0x0000000000220000-0x000000000023C000-memory.dmp

Filesize
112KB

Download
memory/1908-3-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/1908-4-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/1908-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1908-37-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/1908-47-0x0000000000720000-0x0000000000820000-memory.dmp

Filesize
1024KB

Download
memory/1908-67-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/1908-69-0x0000000000720000-0x0000000000820000-memory.dmp

Filesize
1024KB

Download
memory/1908-68-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download

Analysis

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