guloader | 7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06

Analysis

max time kernel
144s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2025, 10:46

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General

Target

7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe
Size

729KB
MD5

0ecb0490b99e9edc4a212c68e747a89c
SHA1

8ffc7b16ca6f35a93b36decf433a8e32f4c0cbd6
SHA256

7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06
SHA512

6b498f10fdd9c4e6f722a8c42731da231e6d8698c5cb0c86489d50b69fa561a43af2d25dc8087ed2e10fa64214c2c7172eed368e9eb260c089084406db56670a
SSDEEP

12288:K/fYDzo3gOSqyRbhkIGh28mZXXfyTN+NFbl5Pj0spM86:+fGUIGABFGMzxjJ

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
5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe
6068	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Buddie\afvnning.opb	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.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	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5408 wrote to memory of 6068	5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe	107
PID 5408 wrote to memory of 6068	5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe	107
PID 5408 wrote to memory of 6068	5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe	107
PID 5408 wrote to memory of 6068	5408	7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe	107

C:\Users\Admin\AppData\Local\Temp\7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe
"C:\Users\Admin\AppData\Local\Temp\7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5408
- C:\Users\Admin\AppData\Local\Temp\7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe
  "C:\Users\Admin\AppData\Local\Temp\7671aa49c3696d1e98ce94df91c3c996af1cb8e58cc3b79552b475dcf8b6ca06.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:6068

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\nsmBD27.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
memory/5408-21-0x0000000077481000-0x00000000775A1000-memory.dmp

Filesize
1.1MB

Download
memory/5408-23-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/5408-22-0x0000000077481000-0x00000000775A1000-memory.dmp

Filesize
1.1MB

Download
memory/6068-25-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/6068-24-0x0000000001660000-0x0000000006C66000-memory.dmp

Filesize
86.0MB

Download
memory/6068-26-0x0000000077508000-0x0000000077509000-memory.dmp

Filesize
4KB

Download
memory/6068-27-0x0000000077525000-0x0000000077526000-memory.dmp

Filesize
4KB

Download
memory/6068-28-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/6068-29-0x0000000077481000-0x00000000775A1000-memory.dmp

Filesize
1.1MB

Download