stealthworker | 0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4

Analysis

max time kernel
110s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
19/03/2024, 18:51

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General

Target

0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4.exe
Size

6.8MB
MD5

0721b1d0c9c68c18116273f2c293ff21
SHA1

dac53205b4ba718542138d90eb56f1641f5807b8
SHA256

0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4
SHA512

012ee21fa04e7e361d4565ba81cc8ba256fb48a75cc93c5c6ea1f77f1e69adc3a5c14275dfe358e72b6f41dd67d174c0bbb4ca26d39f9c08168ccbb9d06d3ba9
SSDEEP

49152:k92mic7iMnbPvRUAm+ugRkqjR7Q8TOc5KubExvCsNGEgveIXB4IuBNT/IeswF69B:BmP7i+Rf0es5u2BNTAcSE8wIX

Score

10^/10

stealthworker botnet discovery

Malware Config

Signatures

StealthWorker
StealthWorker is golang-based brute force malware.
botnet stealthworker
Contacts a large (3570) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchostsw.exe	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchostsw.exe	cmd.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 4596	3288	0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4.exe	79
PID 3288 wrote to memory of 4596	3288	0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4.exe	79
PID 3288 wrote to memory of 4596	3288	0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4.exe	79

C:\Users\Admin\AppData\Local\Temp\0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4.exe
"C:\Users\Admin\AppData\Local\Temp\0c3ee3977deb2ab25d67d6b346b7c96497c4ff18b76678ca990b8493f23248a4.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Windows\SysWOW64\cmd.exe
  cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
  2⤵
  - Drops startup file
  PID:4596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\s.bat

Filesize
323B

MD5
e261f419ce27bed18eab2b80657adaba

SHA1
ebf5f7ced30ddeabeb5e8f9db7f418101444c7ae

SHA256
5333673f7f6f91a2473a4390011f55773173480f49b7f3d2c40c9d58031460aa

SHA512
69255304f43c383b3f614f9758c0138fec5d4b5a5cf02258e81f0e1e47b6b97ada77b2d9a409300c2f8ab14c1f1c421a8be55b2d110c55e6452014b486095175

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