guloader | b9b1c8acdc64f654a3d8c2720782e6be9e7e4705f51649dae046324373e698db

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240729-es
resource tags

arch:x64arch:x86image:win7-20240729-eslocale:es-esos:windows7-x64systemwindows
submitted
10-02-2025 15:18

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

facturas gastos.exe
Size

745KB
MD5

8dc8cf246524b17d39192ce55775a432
SHA1

26b08499349f01da7d19e237faee557896d55960
SHA256

b9b1c8acdc64f654a3d8c2720782e6be9e7e4705f51649dae046324373e698db
SHA512

02911c4024625a952def92c19cd60cf6aa41ff910d18a2069f07bb784d11a0f72b93074c5e9ad3ce541e89e7534d6066e9eb21b04d17731e28359a006fa8910b
SSDEEP

12288:QnPdlJ6taLIKHLrNEVDGmWM4yEImuD+PrbxXD1MX2nxf/1mXi+e4bDvEye9HBr3:4PdlJ6tSTHAWMfRDED1MSrMi+xnMyo

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 2 IoCs

pid	Process
1760	facturas gastos.exe
1760	facturas gastos.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2800	1760	WerFault.exe	29

System Location Discovery: System Language Discovery 1 TTPs 1 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	facturas gastos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2800	1760	facturas gastos.exe	31
PID 1760 wrote to memory of 2800	1760	facturas gastos.exe	31
PID 1760 wrote to memory of 2800	1760	facturas gastos.exe	31
PID 1760 wrote to memory of 2800	1760	facturas gastos.exe	31

C:\Users\Admin\AppData\Local\Temp\facturas gastos.exe
"C:\Users\Admin\AppData\Local\Temp\facturas gastos.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1760 -s 532
  2⤵
  - Program crash
  PID:2800

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

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\nseE16C.tmp\System.dll

Filesize
12KB

MD5
4add245d4ba34b04f213409bfe504c07

SHA1
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

SHA256
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

SHA512
1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

Download Submit
memory/1760-23-0x0000000004610000-0x00000000050B5000-memory.dmp

Filesize
10.6MB

Download
memory/1760-24-0x0000000004610000-0x00000000050B5000-memory.dmp

Filesize
10.6MB

Download