zloader | 3707ad9488f65a2425dc524d7a496e4458410d31b576348487993272505018f5

General

Target

3707ad9488f65a2425dc524d7a496e4458410d31b576348487993272505018f5.vbs
Size

1.1MB
MD5

88cb1b3a2c58a40c6ecbd2897465337d
SHA1

2e866fde78317929b59ed9cf63806116b38a0602
SHA256

3707ad9488f65a2425dc524d7a496e4458410d31b576348487993272505018f5
SHA512

08450aaefbe3cce898ac8c6dcb5b065b773fdd2b0f66a630711b85d5510f8553f8d19fa6e634d42a6508deb46c10162b2ed74fd3a433f727799a56bbe4cc1bbc

Score

10^/10

zloader main 01.04.2020 botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

main

Campaign

01.04.2020

C2

https://postgringos.com/sound.php

https://tetraslims.com/sound.php

https://starterdatas.com/sound.php

https://nexycombats.com/sound.php

https://hibsurf.com/sound.php

https://buhismus.com/sound.php

https://spensores.com/sound.php

https://zonaa.org/sound.php

https://smoash.org/sound.php

Attributes

build_id
31

rc4.plain

Signatures

Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exe

description pid pid_target process target process

Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 980 1596 rundll32.exe
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

Processes:

rundll32.exe

pid process

1068 rundll32.exe
1068 rundll32.exe
1068 rundll32.exe
1068 rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	980	1596	rundll32.exe

pid	process
1068	rundll32.exe
1068	rundll32.exe
1068	rundll32.exe
1068	rundll32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msiexec.exe

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\Yxhaopl = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Ubxoov\\wehexa.dll,DllRegisterServer"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 1068 set thread context of 556 1068 rundll32.exe msiexec.exe
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

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 556 msiexec.exe
Token: SeSecurityPrivilege 556 msiexec.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

WScript.exe

pid process

2024 WScript.exe

description	pid	process	target process
PID 1068 set thread context of 556	1068	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	556	msiexec.exe
Token: SeSecurityPrivilege	556	msiexec.exe

pid	process
2024	WScript.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 980 wrote to memory of 1068	980	rundll32.exe	rundll32.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe
PID 1068 wrote to memory of 556	1068	rundll32.exe	msiexec.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\3707ad9488f65a2425dc524d7a496e4458410d31b576348487993272505018f5.vbs"
1⤵
- Suspicious use of FindShellTrayWindow
PID:2024

C:\Windows\system32\rundll32.exe
rundll32 C:\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe,DllRegisterServer
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:980

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe,DllRegisterServer
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1068

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:556

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe
MD5
fcb76558dbf86a26c4bdd2811d5d06b6

SHA1
dabfb88a8dea9c8c258be021a3d190e145a65847

SHA256
81a9eb444ffc7c5a700d4da6198c2f929d0e312d38667b9d3e29740eccabca3f

SHA512
01f4f2457a7660fed51afb1b99f856eaae1398d4e8291c91adf1fdd7343f68e16a18d6e3054f2c6d063b785b51ccc3da4da6aae3544a697902aa70716ad96471

Download Submit
\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe
MD5
fcb76558dbf86a26c4bdd2811d5d06b6

SHA1
dabfb88a8dea9c8c258be021a3d190e145a65847

SHA256
81a9eb444ffc7c5a700d4da6198c2f929d0e312d38667b9d3e29740eccabca3f

SHA512
01f4f2457a7660fed51afb1b99f856eaae1398d4e8291c91adf1fdd7343f68e16a18d6e3054f2c6d063b785b51ccc3da4da6aae3544a697902aa70716ad96471

Download Submit
\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe
MD5
fcb76558dbf86a26c4bdd2811d5d06b6

SHA1
dabfb88a8dea9c8c258be021a3d190e145a65847

SHA256
81a9eb444ffc7c5a700d4da6198c2f929d0e312d38667b9d3e29740eccabca3f

SHA512
01f4f2457a7660fed51afb1b99f856eaae1398d4e8291c91adf1fdd7343f68e16a18d6e3054f2c6d063b785b51ccc3da4da6aae3544a697902aa70716ad96471

Download Submit
\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe
MD5
fcb76558dbf86a26c4bdd2811d5d06b6

SHA1
dabfb88a8dea9c8c258be021a3d190e145a65847

SHA256
81a9eb444ffc7c5a700d4da6198c2f929d0e312d38667b9d3e29740eccabca3f

SHA512
01f4f2457a7660fed51afb1b99f856eaae1398d4e8291c91adf1fdd7343f68e16a18d6e3054f2c6d063b785b51ccc3da4da6aae3544a697902aa70716ad96471

Download Submit
\Users\Admin\AppData\Local\Temp\sRjbEZvCFOESXQJ.exe
MD5
fcb76558dbf86a26c4bdd2811d5d06b6

SHA1
dabfb88a8dea9c8c258be021a3d190e145a65847

SHA256
81a9eb444ffc7c5a700d4da6198c2f929d0e312d38667b9d3e29740eccabca3f

SHA512
01f4f2457a7660fed51afb1b99f856eaae1398d4e8291c91adf1fdd7343f68e16a18d6e3054f2c6d063b785b51ccc3da4da6aae3544a697902aa70716ad96471

Download Submit
memory/556-64-0x0000000000090000-0x00000000000C1000-memory.dmp

Filesize
196KB

Download
memory/556-63-0x0000000000090000-0x00000000000C0000-memory.dmp

Filesize
192KB

Download
memory/556-65-0x0000000000090000-0x00000000000C1000-memory.dmp

Filesize
196KB

Download
memory/556-67-0x0000000000090000-0x00000000000C0000-memory.dmp

Filesize
192KB

Download
memory/1068-56-0x00000000751B1000-0x00000000751B3000-memory.dmp

Filesize
8KB

Download
memory/1068-61-0x00000000001D0000-0x0000000000223000-memory.dmp

Filesize
332KB

Download
memory/1068-62-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/2024-54-0x000007FEFB591000-0x000007FEFB593000-memory.dmp

Filesize
8KB

Download

Analysis

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