zloader | 66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64

General

Target

zloader 2_1.0.15.0.vir.dll
Size

128KB
MD5

33d2581d7d36acde729ce52c5d106d79
SHA1

48b9cbe0f6922d6c844ab7b7122bc0cd389bf711
SHA256

66f49a261b6086dfdd1c3e2a21f7cb746aa35707490cbd64693d66383ba54c64
SHA512

75acc63cb9c38c0dd3d1759c93f38fc41e62b8853146267b6d80c7b979cf9bf281d3bd44519f1f6a9085d161a4a3d5abc5c71702c914382645e55af3fd6c8770

Score

10^/10

trojan botnet zloader persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 900 wrote to memory of 836	900	rundll32.exe	rundll32.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe
PID 836 wrote to memory of 1816	836	rundll32.exe	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 836 set thread context of 1816 836 rundll32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 1816 msiexec.exe
Token: SeSecurityPrivilege 1816 msiexec.exe
Zloader, Terdot, DELoader, ZeusSphinx
Zloader is a malware strain that was initially discovered back in August 2015.
trojan botnet zloader

description	pid	process	target process
PID 836 set thread context of 1816	836	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	1816	msiexec.exe
Token: SeSecurityPrivilege	1816	msiexec.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-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ecehhyde = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Ufef\\dudih.dll,DllRegisterServer"	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\zloader 2_1.0.15.0.vir.dll",#1
1⤵
- Suspicious use of WriteProcessMemory
PID:900

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\zloader 2_1.0.15.0.vir.dll",#1
2⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:836

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Suspicious use of AdjustPrivilegeToken
- Adds Run key to start application
PID:1816

Network

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/836-0-0x0000000000000000-mapping.dmp

Download
memory/1816-1-0x0000000000110000-0x0000000000135000-memory.dmp

Filesize
148KB

Download
memory/1816-2-0x0000000000140000-0x0000000000141000-memory.dmp

Filesize
4KB

Download
memory/1816-3-0x0000000000110000-0x0000000000135000-memory.dmp

Filesize
148KB

Download
memory/1816-4-0x0000000000000000-mapping.dmp

Download

Analysis

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