stealthworker | a815984315b712dc2067fcf34bc1ba95b9badebb78e20afb7fb3068bcdf1dbb7

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05/12/2024, 16:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe
Size

2.3MB
MD5

c88dc765a7c177418c78681e6c997ff4
SHA1

a1c6b7a24474ffd02ac9a3d515ffb9c1a255259e
SHA256

a815984315b712dc2067fcf34bc1ba95b9badebb78e20afb7fb3068bcdf1dbb7
SHA512

7680712c56b8fda096d8115d82dad75f44723f2b9298820a3d4b08276502584ac2f83d3930a27ed7ecad47f2774f4296870d9cf4bf10eafa15ae0d146451ebe1
SSDEEP

49152:4fSA5sZBZ2bLAqFEBjlqDnlhPYEwXYP5Rw3t8BxDemj2KgH:+16kRFEBjlanMGR6twpekg

Score

10^/10

stealthworker botnet discovery upx

Malware Config

Extracted

Family

stealthworker

Version

3.11

http://176.121.14.113:8888

Signatures

StealthWorker
StealthWorker is golang-based brute force malware.
botnet stealthworker
Stealthworker family
stealthworker

Drops startup file 2 IoCs

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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3508-3-0x0000000000400000-0x0000000000AE5000-memory.dmp	upx
behavioral2/memory/3508-8-0x0000000000400000-0x0000000002E34000-memory.dmp	upx
behavioral2/memory/3508-12-0x0000000000400000-0x0000000000AE5000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3508 wrote to memory of 2120	3508	c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe	91
PID 3508 wrote to memory of 2120	3508	c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe	91
PID 3508 wrote to memory of 2120	3508	c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe	91

C:\Users\Admin\AppData\Local\Temp\c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c88dc765a7c177418c78681e6c997ff4_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3508
- C:\Windows\SysWOW64\cmd.exe
  cmd /Q /C C:\Users\Admin\AppData\Local\Temp/s.bat
  2⤵
  - Drops startup file
  - System Location Discovery: System Language Discovery
  PID:2120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
305B

MD5
71b616e6a039339d8d805b180c5fb9ad

SHA1
1b1d9fbee32b71d9bd4b125a6be4a694a926ca2e

SHA256
95e61578f1b14f4421c388872cbc940608ff6ecb1a3c6ec446d46a7554506507

SHA512
bcd5e935265417c3a71097d68fb2f83b87bd06fb6d67e3019f4cddee953af9aab12dee61f7da8aa2f8131f090b3b7bc0c332a89b46e07effb156b4f491ef34e0

Download Submit
memory/3508-2-0x0000000004FE0000-0x00000000051F1000-memory.dmp

Filesize
2.1MB

Download
memory/3508-1-0x0000000004DC0000-0x0000000004FD9000-memory.dmp

Filesize
2.1MB

Download
memory/3508-3-0x0000000000400000-0x0000000000AE5000-memory.dmp

Filesize
6.9MB

Download
memory/3508-8-0x0000000000400000-0x0000000002E34000-memory.dmp

Filesize
42.2MB

Download
memory/3508-10-0x0000000004DC0000-0x0000000004FD9000-memory.dmp

Filesize
2.1MB

Download
memory/3508-11-0x0000000004FE0000-0x00000000051F1000-memory.dmp

Filesize
2.1MB

Download
memory/3508-12-0x0000000000400000-0x0000000000AE5000-memory.dmp

Filesize
6.9MB

Download