zloader | 187e7ad44558b62fdebe79a0ab45f4cdde66f05945d3c7fe848a2212f5fd555d

Resubmissions

04-03-2021 14:07

210304-t8mkw9zwcx 10

09-06-2020 12:53

200609-94pakbswws 10

Analysis

max time kernel
142s
max time network
143s
platform
windows7_x64
resource
win7v20201028
submitted
04-03-2021 14:07

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General

Target

zet.dll
Size

475KB
MD5

c83275d7c15af02f0a56eed274b8b67b
SHA1

38fbad3e2ce170e7010f86b21af6bd485ad1c6b5
SHA256

187e7ad44558b62fdebe79a0ab45f4cdde66f05945d3c7fe848a2212f5fd555d
SHA512

8f592dce913f94994e67c16e2ab36349cb6185156dd04b68cd4ce619a752b54131f7285ac78e31a2c6bee1ce433e9f9d42728fbe3c7966a586c8e1cc3834ac6c

Score

10^/10

zloader bot5 bot5 botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

bot5

Campaign

bot5

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\Isos = "regsvr32.exe /s C:\\Users\\Admin\\AppData\\Roaming\\Ybog\\keasqo.dll"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 2008 set thread context of 1624 2008 rundll32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 1624 msiexec.exe
Token: SeSecurityPrivilege 1624 msiexec.exe

description	pid	process	target process
PID 2008 set thread context of 1624	2008	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	1624	msiexec.exe
Token: SeSecurityPrivilege	1624	msiexec.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 2008	1044	rundll32.exe	rundll32.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe
PID 2008 wrote to memory of 1624	2008	rundll32.exe	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\zet.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1044

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\zet.dll,#1
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2008

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:1624

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/824-9-0x000007FEF77C0000-0x000007FEF7A3A000-memory.dmp

Filesize
2.5MB

Download
memory/1624-6-0x0000000000000000-mapping.dmp

Download
memory/1624-8-0x0000000000110000-0x000000000013B000-memory.dmp

Filesize
172KB

Download
memory/2008-2-0x0000000000000000-mapping.dmp

Download
memory/2008-3-0x00000000760A1000-0x00000000760A3000-memory.dmp

Filesize
8KB

Download
memory/2008-4-0x0000000010000000-0x000000001002B000-memory.dmp

Filesize
172KB

Download
memory/2008-5-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download