zloader | 7fdd024bec3841eaaf2ac0b352b66380ef74cf47f37c965982d36be948bcf75d

Analysis

max time kernel
123s
max time network
123s
platform
windows10_x64
resource
win10v20201028
submitted
09-11-2020 20:47

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General

Target

tsk.dll
Size

489KB
MD5

a09579dd34dbef1b234181c9d780c239
SHA1

31e811931d2a5174e0f505f9e6a92e2c752f676c
SHA256

7fdd024bec3841eaaf2ac0b352b66380ef74cf47f37c965982d36be948bcf75d
SHA512

0208067a7a4e5433fa30739425ca51e08b9972f260d93876f8156f5a914dc6a536e0129edb70e04e60013e4655eeccd6c78c283d51a03febd478e95a4e1fe431

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-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Anfe = "regsvr32.exe /s C:\\Users\\Admin\\AppData\\Roaming\\Tutuug\\cowaulab.dll"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 1228 set thread context of 2448 1228 rundll32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 2448 msiexec.exe
Token: SeSecurityPrivilege 2448 msiexec.exe

description	pid	process	target process
PID 1228 set thread context of 2448	1228	rundll32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	2448	msiexec.exe
Token: SeSecurityPrivilege	2448	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1036 wrote to memory of 1228	1036	rundll32.exe	rundll32.exe
PID 1036 wrote to memory of 1228	1036	rundll32.exe	rundll32.exe
PID 1036 wrote to memory of 1228	1036	rundll32.exe	rundll32.exe
PID 1228 wrote to memory of 2448	1228	rundll32.exe	msiexec.exe
PID 1228 wrote to memory of 2448	1228	rundll32.exe	msiexec.exe
PID 1228 wrote to memory of 2448	1228	rundll32.exe	msiexec.exe
PID 1228 wrote to memory of 2448	1228	rundll32.exe	msiexec.exe
PID 1228 wrote to memory of 2448	1228	rundll32.exe	msiexec.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\tsk.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1036

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\tsk.dll,#1
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1228

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:2448

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

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Downloads

memory/1228-0-0x0000000000000000-mapping.dmp

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memory/2448-1-0x0000000000A70000-0x0000000000A9B000-memory.dmp

Filesize
172KB

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memory/2448-2-0x0000000000000000-mapping.dmp

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