guloader | 4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346

Analysis

max time kernel
21s
max time network
110s
platform
windows10_x64
resource
win10v20210408
submitted
05-05-2021 01:18

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General

Target

4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe
Size

108KB
MD5

b5ab0642f7fc7304d715000e262aa7d5
SHA1

9a622c6d20bcd10f4328405ce844af46a3dbf407
SHA256

4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346
SHA512

2d9ee0a318e2a2ebc1f1d8de70d444b87bacfe800f18901f39b855ae292fd9454f47bff5b880d93432530fa19e0997df76d9cd26e3996f3a05e57b050c1550a1

Score

10^/10

guloader downloader guloader

Malware Config

Extracted

Family

guloader

https://onedrive.live.com/download?cid=E61E5F3F655316FA&resid=E61E5F3F655316FA%21136&authkey=ADy1X8G-a-i3n0s

xor.base64

Signatures

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

Guloader Payload 1 IoCs

guloader

Processes:

resource	yara_rule
behavioral2/memory/3728-116-0x0000000002240000-0x000000000224A000-memory.dmp	family_guloader

Checks QEMU agent state file 2 TTPs 1 IoCs
Checks state file used by QEMU agent, possibly to detect virtualization.

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

description ioc process

File opened (read-only) C:\ProgramData\qemu-ga\qga.state 4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

pid process

3728 4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

pid process

3728 4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

description	ioc	process
File opened (read-only)	C:\ProgramData\qemu-ga\qga.state	4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

pid	process
3728	4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

pid	process
3728	4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe

C:\Users\Admin\AppData\Local\Temp\4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe
"C:\Users\Admin\AppData\Local\Temp\4d88b67d2370313735a7b2b172972bf224bce4e742d276249d4f612261036346.exe"
1⤵
- Checks QEMU agent state file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:3728

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/3728-116-0x0000000002240000-0x000000000224A000-memory.dmp

Filesize
40KB

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