guloader | 7ded0823fe4911f4131276e603c3da24ebde856775f6d334e8cc850c9e18e6af

General

Target

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
Size

873KB
MD5

0034fce6ab0a05dca93fbf84cc933bd2
SHA1

b1614b89fd423326696a6dbaf40c56f82732f472
SHA256

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83
SHA512

5c76e1dbf491051d08d2e679e284168086473ea57b84762f5cb22ff33f067806faf9bf55edd42f90fe7d3838d9d654a3918e64df10c9ceba34cf5aedf21370d8
SSDEEP

24576:PuHL2plae9Fplb2MnJNhdjLiDueXf98l8mkyvl:kelaezHJO/8l8mkyvl

Score

10^/10

guloader downloader persistence

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Loads dropped DLL 1 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

pid process

4520 18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Skamferingen = "C:\\Users\\Admin\\AppData\\Roaming\\Dannemnd\\Mycoderm80.scr"	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

pid	process
2508	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
2508	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

pid	process
4520	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
2508	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

description	pid	process	target process
PID 4520 set thread context of 2508	4520	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

pid process

4520 18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

pid process

2508 18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

description	pid	process	target process
PID 4520 wrote to memory of 2508	4520	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
PID 4520 wrote to memory of 2508	4520	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
PID 4520 wrote to memory of 2508	4520	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
PID 4520 wrote to memory of 2508	4520	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe	18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe

C:\Users\Admin\AppData\Local\Temp\18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
"C:\Users\Admin\AppData\Local\Temp\18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4520

C:\Users\Admin\AppData\Local\Temp\18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe
"C:\Users\Admin\AppData\Local\Temp\18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83.exe"
2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:2508

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Web Service

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsk6FB9.tmp\System.dll
Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/2508-141-0x0000000001660000-0x000000000673F000-memory.dmp

Filesize
80.9MB

Download
memory/2508-145-0x0000000077E30000-0x0000000077FD3000-memory.dmp

Filesize
1.6MB

Download
memory/2508-144-0x00007FFE3A530000-0x00007FFE3A725000-memory.dmp

Filesize
2.0MB

Download
memory/2508-143-0x0000000077E30000-0x0000000077FD3000-memory.dmp

Filesize
1.6MB

Download
memory/2508-137-0x0000000000000000-mapping.dmp

Download
memory/2508-142-0x00007FFE3A530000-0x00007FFE3A725000-memory.dmp

Filesize
2.0MB

Download
memory/2508-139-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2508-140-0x0000000001660000-0x000000000673F000-memory.dmp

Filesize
80.9MB

Download
memory/4520-135-0x00007FFE3A530000-0x00007FFE3A725000-memory.dmp

Filesize
2.0MB

Download
memory/4520-138-0x0000000077E30000-0x0000000077FD3000-memory.dmp

Filesize
1.6MB

Download
memory/4520-136-0x0000000077E30000-0x0000000077FD3000-memory.dmp

Filesize
1.6MB

Download
memory/4520-134-0x0000000004B00000-0x0000000009BDF000-memory.dmp

Filesize
80.9MB

Download
memory/4520-133-0x0000000004B00000-0x0000000009BDF000-memory.dmp

Filesize
80.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads