zloader | b866a18458d22f3c362eb9db308ccbbe80ad1a1ef04d9f1c8ba6d3c66ccd4971

General

Target

updateme.dll
Size

157KB
MD5

c182f4b04f4c0b361c0792f9e75621b2
SHA1

4026c3deb1203f6ee5afed71233b888e6f9b393a
SHA256

b866a18458d22f3c362eb9db308ccbbe80ad1a1ef04d9f1c8ba6d3c66ccd4971
SHA512

f97ef84dea027e4b9b68c10f1eb599545f8d742698c5a85352460993ec080a14a80b345328c3511e937d7e9797a447b0f47b03b7cb87094ee63788d159a9f2ac

Score

10^/10

persistence trojan botnet zloader

Malware Config

Signatures

Zloader, Terdot, DELoader, ZeusSphinx
Zloader is a malware strain that was initially discovered back in August 2015.
trojan botnet zloader
Blacklisted process makes network request 2 IoCs

Processes:

msiexec.exe

flow pid process

6 548 msiexec.exe
7 548 msiexec.exe

flow	pid	process
6	548	msiexec.exe
7	548	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-1-5-21-2090973689-680783404-4292415065-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2090973689-680783404-4292415065-1000\Software\Microsoft\Windows\CurrentVersion\Run\Uhkeew = "regsvr32.exe /s C:\\Users\\Admin\\AppData\\Roaming\\Ciimk\\aryn.dll"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 1664 set thread context of 548 1664 rundll32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 548 msiexec.exe
Token: SeSecurityPrivilege 548 msiexec.exe

description	pid	process	target process
PID 1664 set thread context of 548	1664	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	548	msiexec.exe
Token: SeSecurityPrivilege	548	msiexec.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 108 wrote to memory of 1664	108	rundll32.exe	rundll32.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe
PID 1664 wrote to memory of 548	1664	rundll32.exe	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\updateme.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:108

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\updateme.dll,#1
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1664

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Blacklisted process makes network request
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:548

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/548-1-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/548-2-0x00000000000C0000-0x00000000000C1000-memory.dmp

Filesize
4KB

Download
memory/548-3-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/548-4-0x0000000000000000-mapping.dmp

Download
memory/1340-5-0x000007FEF7F70000-0x000007FEF81EA000-memory.dmp

Filesize
2.5MB

Download
memory/1664-0-0x0000000000000000-mapping.dmp

Download

Analysis

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