guloader | 4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250

General

Target

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
Size

100KB
MD5

6dff5a79a9bc46bf3267a234abee1416
SHA1

9f1812f43c31156297c297f637a0e5dc51d8e727
SHA256

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250
SHA512

55866786a0c0bc68ac23604e59ba7e73570e58690ceebee3133cbd2ae4aa9d5203c260c302a96d2abf6200c17b59bcf0fdd09c7c708649c633c81beefabe2f60
SSDEEP

768:G729FUTWbLYqHmHF6QwYXPSdDjYA4vH3d7/+dKZo:TnUTWgplsuKdDjpCHt7/+Yo

Score

10^/10

guloader downloader persistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1LcWyjKOhCqF8z_TZw5yPPFDSHn9QcgVP

http://marckasgfdvc.ug/Host12_encrypted_452A510.bin

xor.base64

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\siouxindi = "C:\\Users\\Admin\\PLATTERE\\Viljern.vbs"	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

pid	process
2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
956	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

description	pid	process	target process
PID 2044 set thread context of 956	2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

pid process

2044 4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

pid process

2044 4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

description	pid	process	target process
PID 2044 wrote to memory of 956	2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
PID 2044 wrote to memory of 956	2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
PID 2044 wrote to memory of 956	2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
PID 2044 wrote to memory of 956	2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
PID 2044 wrote to memory of 956	2044	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe	4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe

C:\Users\Admin\AppData\Local\Temp\4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
"C:\Users\Admin\AppData\Local\Temp\4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe"
1⤵
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2044

C:\Users\Admin\AppData\Local\Temp\4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe
"C:\Users\Admin\AppData\Local\Temp\4b6908ad09c817290c3a37fb078b6667e2479aa32264946e724e8cd39d7de250.exe"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:956

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/956-60-0x00000000004013BC-mapping.dmp

Download
memory/956-61-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/956-65-0x00000000001B0000-0x00000000002B0000-memory.dmp

Filesize
1024KB

Download
memory/956-66-0x00000000779D0000-0x0000000077B79000-memory.dmp

Filesize
1.7MB

Download
memory/956-69-0x0000000077BB0000-0x0000000077D30000-memory.dmp

Filesize
1.5MB

Download
memory/956-70-0x0000000077BB0000-0x0000000077D30000-memory.dmp

Filesize
1.5MB

Download
memory/2044-56-0x00000000002F0000-0x0000000000300000-memory.dmp

Filesize
64KB

Download
memory/2044-57-0x00000000779D0000-0x0000000077B79000-memory.dmp

Filesize
1.7MB

Download
memory/2044-59-0x0000000075F81000-0x0000000075F83000-memory.dmp

Filesize
8KB

Download
memory/2044-63-0x00000000002F0000-0x0000000000300000-memory.dmp

Filesize
64KB

Download
memory/2044-64-0x0000000077BB0000-0x0000000077D30000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads