zloader | 3920ecf9f7dc8f7fe34721ff41f5955b2ed0943eae2031ff602ae92bc6f3b7c5

General

Target

3920ecf9f7dc8f7fe34721ff41f5955b2ed0943eae2031ff602ae92bc6f3b7c5.vbs
Size

1.2MB
MD5

8fe28d9e48e7f52c6a7a80c351fa00ee
SHA1

6c137516acc48185f3a916647a729a03f94b09c3
SHA256

3920ecf9f7dc8f7fe34721ff41f5955b2ed0943eae2031ff602ae92bc6f3b7c5
SHA512

6058373532310935ff6b1952a57b512f85e2deee9740e46c3722f0d1adfae23d1471fe3442aa3527ec50bd82815326d0f8fa65845872ff0d4ccd2d0318cb933e

Score

10^/10

zloader main 02.04.2020 botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

main

Campaign

02.04.2020

C2

https://klill.com/sound.php

https://geost.com/sound.php

https://tarsilh.com/sound.php

https://lildor.com/sound.php

https://imosey.com/sound.php

https://obeaf.com/sound.php

https://pheia.com/sound.php

https://smenard.com/sound.php

Attributes

build_id
32

rc4.plain

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1548	1652	rundll32.exe	27

Zloader, Terdot, DELoader, ZeusSphinx
Zloader is a malware strain that was initially discovered back in August 2015.
trojan botnet zloader

Loads dropped DLL 4 IoCs

pid	Process
1608	rundll32.exe
1608	rundll32.exe
1608	rundll32.exe
1608	rundll32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\Qyogte = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Byugs\\avek.dll,DllRegisterServer"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1608 set thread context of 668	1608	rundll32.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSecurityPrivilege	668	msiexec.exe
Token: SeSecurityPrivilege	668	msiexec.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1284	WScript.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1548 wrote to memory of 1608	1548	rundll32.exe	29
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30
PID 1608 wrote to memory of 668	1608	rundll32.exe	30

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\3920ecf9f7dc8f7fe34721ff41f5955b2ed0943eae2031ff602ae92bc6f3b7c5.vbs"
1⤵
- Suspicious use of FindShellTrayWindow
PID:1284

C:\Windows\system32\rundll32.exe
rundll32 C:\Users\Admin\AppData\Local\Temp\xiSiDJtJfVUnjTv.exe,DllRegisterServer
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 C:\Users\Admin\AppData\Local\Temp\xiSiDJtJfVUnjTv.exe,DllRegisterServer
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1608
- - C:\Windows\SysWOW64\msiexec.exe
    msiexec.exe
    3⤵
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    PID:668

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/668-62-0x0000000000110000-0x0000000000140000-memory.dmp

Filesize
192KB

Download
memory/668-63-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/668-64-0x0000000000110000-0x0000000000140000-memory.dmp

Filesize
192KB

Download
memory/668-66-0x0000000000110000-0x00000000001F0000-memory.dmp

Filesize
896KB

Download
memory/1284-53-0x000007FEFC2B1000-0x000007FEFC2B3000-memory.dmp

Filesize
8KB

Download
memory/1608-55-0x0000000076451000-0x0000000076453000-memory.dmp

Filesize
8KB

Download
memory/1608-60-0x0000000000180000-0x00000000001CD000-memory.dmp

Filesize
308KB

Download
memory/1608-61-0x0000000010000000-0x00000000100DA000-memory.dmp

Filesize
872KB

Download

Analysis

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