stealc | 4887da8b043331a43f0b0a3d9881abae2289cfaa8655bf34aec7b7474190822e

General

Target

file.exe
Size

333KB
MD5

e99cedc3bb79683a0f8a65caff96f39e
SHA1

ada0722d447c76e7f23068d7de7d399bda407b1e
SHA256

4887da8b043331a43f0b0a3d9881abae2289cfaa8655bf34aec7b7474190822e
SHA512

4d7da6297335130b7bbe07db59f1c4d62482ba0fb16604326bc2db5993cb2b17d040f9b4ed5beb029cb4cd5f1a539acaab5a92bcc3ee1eef43e318b72c7768c8
SSDEEP

3072:erZzIJ9jHKfx3JlX7AETp4qAaTo8dRDv8wNlTmtmiVElHRZDU6i+j3wOrNd+7xxK:yFIyJX7lTp4/aVRdssLDU3+jJN2

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://5.42.64.41

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
3008	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1648	file.exe
1648	file.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	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	file.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2612	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1648	file.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 3008	1648	file.exe	29
PID 1648 wrote to memory of 3008	1648	file.exe	29
PID 1648 wrote to memory of 3008	1648	file.exe	29
PID 1648 wrote to memory of 3008	1648	file.exe	29
PID 3008 wrote to memory of 2612	3008	cmd.exe	31
PID 3008 wrote to memory of 2612	3008	cmd.exe	31
PID 3008 wrote to memory of 2612	3008	cmd.exe	31
PID 3008 wrote to memory of 2612	3008	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:2612

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
197KB

MD5
d298031eff7e795989b01df215000ee6

SHA1
2f33c3d02bb9013cc4b0073b96438030627224c6

SHA256
35283de8809b7869a04827395af270201fc1763aee46cd0c602b2039d2bb30e1

SHA512
836ab24684917adec1e9c81eb944fb21b0b8815c3e392e5579676dcc25359d4cb19c56fb2990cbfbe606db47f9541ae51ecc685ccb8cf976b5b9e4e22258efa2

Download Submit
\ProgramData\nss3.dll

Filesize
224KB

MD5
eb7d597759d4f0b93a5662b1609bf5bf

SHA1
80acc03ffd1c7d243606acbeed2a47577c9fddb8

SHA256
9332920c513d6c16124d4dcce54fb572ceb279b360bf7d386cbdfda754339412

SHA512
afefc25a5efb4c87be3ae203a6b982150a58ca9608fcaa676851281e0473caa3fd642d9918a04c08e105039161e7b6cd0fda578ce5f3ace6838e47b3dd76abc0

Download Submit
memory/1648-1-0x0000000000C20000-0x0000000000D20000-memory.dmp

Filesize
1024KB

Download
memory/1648-2-0x00000000002A0000-0x00000000002BC000-memory.dmp

Filesize
112KB

Download
memory/1648-3-0x0000000000400000-0x0000000000BB0000-memory.dmp

Filesize
7.7MB

Download
memory/1648-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1648-39-0x0000000000400000-0x0000000000BB0000-memory.dmp

Filesize
7.7MB

Download
memory/1648-69-0x0000000000400000-0x0000000000BB0000-memory.dmp

Filesize
7.7MB

Download
memory/1648-70-0x0000000000400000-0x0000000000BB0000-memory.dmp

Filesize
7.7MB

Download
memory/1648-71-0x0000000000C20000-0x0000000000D20000-memory.dmp

Filesize
1024KB

Download

Analysis

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