guloader | 1d23717121434089c2ad8f379f1691c42091704a5742ad688e1cd17c6c52f266

General

Target

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
Size

371KB
MD5

1c058fa9d84f8a6c03f1cc95ec306df4
SHA1

14160aedb7da83d8da8cf1a3e5a07837ae472f4f
SHA256

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79
SHA512

463e97a3d5141ddc5c89d0a9230a3e6a1ef287413896934868b949c4fe94f7e59ae40dcf2a7187af1db823ddd52a6719c40d4f2a5b0917b82e9ced8dfe72ba46
SSDEEP

6144:HY2LjnXgw9HpYRWiXy+akwOPU0ZL4Kq0Xe+tSZnJ8bChtWejOrMgt/8CYhFYunEC:hjnXgw9Hp1ii+akwUUCL4T4StiatWJZm

Score

10^/10

guloader discovery downloader

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:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exec942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

Loads dropped DLL 1 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

pid process

3804 c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

pid process

1480 c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exec942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

pid	process
3804	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
1480	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

description	pid	process	target process
PID 3804 set thread context of 1480	3804	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

Drops file in Program Files directory 1 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

description	ioc	process
File created	C:\Program Files (x86)\Fluorate67\Proportionalitetsvurderingens\Pussiest\Excrescence.lnk	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.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: EnumeratesProcesses 2 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

pid	process
1480	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
1480	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

pid process

3804 c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

description	pid	process	target process
PID 3804 wrote to memory of 1480	3804	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
PID 3804 wrote to memory of 1480	3804	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
PID 3804 wrote to memory of 1480	3804	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
PID 3804 wrote to memory of 1480	3804	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe	c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe

C:\Users\Admin\AppData\Local\Temp\c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
"C:\Users\Admin\AppData\Local\Temp\c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3804

C:\Users\Admin\AppData\Local\Temp\c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe
"C:\Users\Admin\AppData\Local\Temp\c942fb184930197000a272bb568bb1744c906f95ec0d1cdd3387971e0fb21c79.exe"
2⤵
- Checks QEMU agent file
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:1480

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsp86CA.tmp\System.dll
Filesize
11KB

MD5
b8992e497d57001ddf100f9c397fcef5

SHA1
e26ddf101a2ec5027975d2909306457c6f61cfbd

SHA256
98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b

SHA512
8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

Download Submit
memory/1480-144-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1480-146-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1480-141-0x0000000001660000-0x000000000639E000-memory.dmp

Filesize
77.2MB

Download
memory/1480-149-0x0000000036950000-0x0000000036C9A000-memory.dmp

Filesize
3.3MB

Download
memory/1480-142-0x00007FF9E0390000-0x00007FF9E0585000-memory.dmp

Filesize
2.0MB

Download
memory/1480-148-0x0000000077750000-0x00000000778F3000-memory.dmp

Filesize
1.6MB

Download
memory/1480-138-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1480-143-0x0000000077750000-0x00000000778F3000-memory.dmp

Filesize
1.6MB

Download
memory/1480-147-0x00007FF9E0390000-0x00007FF9E0585000-memory.dmp

Filesize
2.0MB

Download
memory/1480-137-0x0000000000000000-mapping.dmp

Download
memory/1480-140-0x0000000001660000-0x000000000639E000-memory.dmp

Filesize
77.2MB

Download
memory/1480-145-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3804-133-0x0000000004EC0000-0x0000000009BFE000-memory.dmp

Filesize
77.2MB

Download
memory/3804-134-0x0000000004EC0000-0x0000000009BFE000-memory.dmp

Filesize
77.2MB

Download
memory/3804-135-0x00007FF9E0390000-0x00007FF9E0585000-memory.dmp

Filesize
2.0MB

Download
memory/3804-139-0x0000000077750000-0x00000000778F3000-memory.dmp

Filesize
1.6MB

Download
memory/3804-136-0x0000000077750000-0x00000000778F3000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads