guloader | 3eb9f9daff5ea9886299a1b30b551f71cec5b196bca64669d44bed6bb2ab9495

Analysis

max time kernel
166s
max time network
213s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2025, 16:58

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General

Target

szerződés-pdf.exe
Size

811KB
MD5

8c9a9c036d90711993d0fa59761035fc
SHA1

9fb68ab16c2be99334b2436c5222e3cb75e4fa2c
SHA256

0967e819ae99a6ff7e6e5d1320f6627e25bb643eff4b3cc21f8002fc2eda272e
SHA512

96721499a6e6b891b0c644f506acb124b9f880c0a58e5980047ef5b013455f2902d8d710ac8e969b6d5e0e36f9bf1bab3e54047743757d2e09e3c951969f9e89
SSDEEP

24576:mdYAD9m2Yf+DlEhoicwrJnj+XjBxhaYPAYGuxcDKLT:mX9mfhoizRyXHC/DKLT

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
5776	szerződés-pdf.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4792	szerződés-pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5776	szerződés-pdf.exe
4792	szerződés-pdf.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	szerződés-pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	szerződés-pdf.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe
4792	szerződés-pdf.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5776	szerződés-pdf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5776 wrote to memory of 4792	5776	szerződés-pdf.exe	104
PID 5776 wrote to memory of 4792	5776	szerződés-pdf.exe	104
PID 5776 wrote to memory of 4792	5776	szerződés-pdf.exe	104
PID 5776 wrote to memory of 4792	5776	szerződés-pdf.exe	104

C:\Users\Admin\AppData\Local\Temp\szerződés-pdf.exe
"C:\Users\Admin\AppData\Local\Temp\szerződés-pdf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5776
- C:\Users\Admin\AppData\Local\Temp\szerződés-pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\szerződés-pdf.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsb941F.tmp\System.dll

Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/4792-32-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-35-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-45-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-29-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-28-0x0000000001660000-0x000000000621B000-memory.dmp

Filesize
75.7MB

Download
memory/4792-30-0x0000000077C48000-0x0000000077C49000-memory.dmp

Filesize
4KB

Download
memory/4792-31-0x0000000077C65000-0x0000000077C66000-memory.dmp

Filesize
4KB

Download
memory/4792-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-40-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-34-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4792-33-0x0000000001660000-0x000000000621B000-memory.dmp

Filesize
75.7MB

Download
memory/4792-36-0x0000000077BC1000-0x0000000077CE1000-memory.dmp

Filesize
1.1MB

Download
memory/4792-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4792-38-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4792-39-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/5776-27-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/5776-25-0x0000000077BC1000-0x0000000077CE1000-memory.dmp

Filesize
1.1MB

Download
memory/5776-26-0x0000000077BC1000-0x0000000077CE1000-memory.dmp

Filesize
1.1MB

Download