stealthworker | e251bbef2c33494c43462511bda36339cf2e8b1be5aa30bb77fdc5d168d28db4

Analysis

max time kernel
140s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27/08/2024, 11:02

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General

Target

c4dea1d39e7c009a8dd333e5e84a0486_JaffaCakes118.exe
Size

3.9MB
MD5

c4dea1d39e7c009a8dd333e5e84a0486
SHA1

fbfaa875ffd294b407d038439f8cb561c033cbe1
SHA256

e251bbef2c33494c43462511bda36339cf2e8b1be5aa30bb77fdc5d168d28db4
SHA512

377f196ea88f26f90610fa91543f264c7a710e348695580254458b47ef6f7f930d4adacf85c86eb6aa9461c4edaaa83fe65e0ce8f2b7371e8d54b3c7c2de8da6
SSDEEP

98304:HKIr+ZQqjWg00mSvAbQ05eKz4U0BAyHkVTFl:qI6Sg2vQ9KzDFFl

Score

10^/10

stealthworker botnet discovery upx

Malware Config

Extracted

Family

stealthworker

Version

3.06

http://190.97.167.130:8081

Extracted

Family

stealthworker

Signatures

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

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

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3532-3-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-9-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-13-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-14-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-15-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-16-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-17-0x0000000000400000-0x0000000000AE4000-memory.dmp	upx
behavioral2/memory/3532-18-0x0000000000400000-0x0000000000AE4000-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	c4dea1d39e7c009a8dd333e5e84a0486_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 3532 wrote to memory of 872	3532	c4dea1d39e7c009a8dd333e5e84a0486_JaffaCakes118.exe	98
PID 3532 wrote to memory of 872	3532	c4dea1d39e7c009a8dd333e5e84a0486_JaffaCakes118.exe	98
PID 3532 wrote to memory of 872	3532	c4dea1d39e7c009a8dd333e5e84a0486_JaffaCakes118.exe	98

C:\Users\Admin\AppData\Local\Temp\c4dea1d39e7c009a8dd333e5e84a0486_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c4dea1d39e7c009a8dd333e5e84a0486_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3532
- 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:872

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

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Downloads

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

Filesize
305B

MD5
a4e5715616214549c582e93674d046a5

SHA1
34a403cdb1e2ba2a59c8699c82a2a3ff5889e4ff

SHA256
4dc6e93aea3095c86be9e8b2e41c1dd23829482a9c0994268147289c3e4ee7aa

SHA512
9b23b2cd09dfbffe17d2638abb51b5bde892e515d52ea2e88610bc7d4d7f4eba2ed5ada7c704bf3cdf4ccc824052ac64c7ba914ac9586196a24d3be1916011a1

Download Submit
memory/3532-12-0x0000000002E90000-0x0000000003155000-memory.dmp

Filesize
2.8MB

Download
memory/3532-3-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-2-0x0000000002E90000-0x0000000003155000-memory.dmp

Filesize
2.8MB

Download
memory/3532-9-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-10-0x0000000002AC0000-0x0000000002E82000-memory.dmp

Filesize
3.8MB

Download
memory/3532-1-0x0000000002AC0000-0x0000000002E82000-memory.dmp

Filesize
3.8MB

Download
memory/3532-13-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-14-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-15-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-16-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-17-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download
memory/3532-18-0x0000000000400000-0x0000000000AE4000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads