zloader | 77df6d4908673af83901b67e730abd9a871ee86f7cda058ae25221056cec771e

General

Target

gbs.dll
Size

490KB
MD5

bede6db9d5f81e96c963798aa4effd8e
SHA1

d98f97ad168f686b54a7631a2c6f87690e3bafa3
SHA256

77df6d4908673af83901b67e730abd9a871ee86f7cda058ae25221056cec771e
SHA512

3b4d89bd72b9d0e88171342e8896555720726f11dd83f60b850e811fa7b9f0e86e7b114bfa4d376e3053cea50d323b94cf1a8c6a6f83c60dc5234967ce6b6564

Score

10^/10

zloader bot5 bot5 botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

bot5

Campaign

bot5

C2

https://militanttra.at/owg.php

rc4.plain

rsa_pubkey.plain

Signatures

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

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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\Iqko = "regsvr32.exe /s C:\\Users\\Admin\\AppData\\Roaming\\Faede\\idem.dll"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 1584 set thread context of 580 1584 rundll32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 580 msiexec.exe
Token: SeSecurityPrivilege 580 msiexec.exe

description	pid	process	target process
PID 1584 set thread context of 580	1584	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	580	msiexec.exe
Token: SeSecurityPrivilege	580	msiexec.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1584	844	rundll32.exe	rundll32.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe
PID 1584 wrote to memory of 580	1584	rundll32.exe	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\gbs.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:844

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\gbs.dll,#1
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1584

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:580

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/560-5-0x000007FEF81B0000-0x000007FEF842A000-memory.dmp

Filesize
2.5MB

Download
memory/580-1-0x0000000000090000-0x00000000000BB000-memory.dmp

Filesize
172KB

Download
memory/580-2-0x00000000000C0000-0x00000000000C1000-memory.dmp

Filesize
4KB

Download
memory/580-3-0x0000000000090000-0x00000000000BB000-memory.dmp

Filesize
172KB

Download
memory/580-4-0x0000000000000000-mapping.dmp

Download
memory/1584-0-0x0000000000000000-mapping.dmp

Download

Analysis

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