stealc | 3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30

General

Target

3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe
Size

175KB
MD5

2ff6ee1ef4ea7c63588e3c904e066cf4
SHA1

85a5d659cdcdd358af7320a39dd129601b9e8c41
SHA256

3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30
SHA512

5d00ea2bbe6384e6f4375210f485b80e8109e4c578775d146423696ce8e6b4beac93d240df329ad443f0b03d13ec46cfdd06e80d52946f662263169fffdb6713
SSDEEP

3072:NwLDaY5OIQfqCanVKeZccMBt1n/W77i5ftMwQx6TN45:uLDf5Yo3ZccMB3nAwQ7

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.24

Attributes

url_path
/40d570f44e84a454.php

rc4.plain

Signatures

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

Deletes itself 1 IoCs

pid	Process
3048	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe
2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2452	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 3048	2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe	29
PID 2212 wrote to memory of 3048	2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe	29
PID 2212 wrote to memory of 3048	2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe	29
PID 2212 wrote to memory of 3048	2212	3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe	29
PID 3048 wrote to memory of 2452	3048	cmd.exe	30
PID 3048 wrote to memory of 2452	3048	cmd.exe	30
PID 3048 wrote to memory of 2452	3048	cmd.exe	30
PID 3048 wrote to memory of 2452	3048	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe
"C:\Users\Admin\AppData\Local\Temp\3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3ff61ca2f5d065e7b09031ba27eb2a7e4000359d75a788245f12fcf6bba0ae30.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2452

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
399KB

MD5
ca7d772dbf6d7a0edff015ce4d324278

SHA1
80ab071da89e7cf93c969575400a96a70525f5ce

SHA256
57f899ab12e2a9ffa93bb83a0ebc8f507498948cd42d7354d7b5d1efbe93c6f2

SHA512
0d2f0cffac24d3d3c15cbb6038d2f1d350a55f10e52693c5c75d3fc3d420cf32f88cb68aced799d88281a8564bbf97308c51d0baeac44b84fa897c1b5a5e673a

Download Submit
\ProgramData\nss3.dll

Filesize
411KB

MD5
144294c493f25912b50f94091f396cce

SHA1
e467dfe03750e08fbbb4884d96459433e0530d68

SHA256
18f887d5fa55d539a240d49330fddf9555bfd788fabe0028e1cc20aacd058caf

SHA512
c421c7818b53754c626d092d112bdf4f9331efcae905e3dc4fdb328600a4db107e1513cdabbfee28132537ab1330fc4bc726c1a3d739958915de62a728f0135a

Download Submit
memory/2212-1-0x0000000000750000-0x0000000000850000-memory.dmp

Filesize
1024KB

Download
memory/2212-2-0x0000000000220000-0x000000000023C000-memory.dmp

Filesize
112KB

Download
memory/2212-3-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2212-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2212-42-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2212-64-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download
memory/2212-65-0x0000000000750000-0x0000000000850000-memory.dmp

Filesize
1024KB

Download
memory/2212-72-0x0000000000750000-0x0000000000850000-memory.dmp

Filesize
1024KB

Download
memory/2212-71-0x0000000000400000-0x000000000062E000-memory.dmp

Filesize
2.2MB

Download

Analysis

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