guloader | b3cc4e1f09aa77a31e7071f2a505bfe5f13f9ec3cb73997b0d4a5ac36fc710fa

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-12-2024 14:12

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General

Target

Avis de virement.exe
Size

124KB
MD5

63a9dd43976a1fee9357d85367a23fac
SHA1

2951b3d16d7449f857d88cfa403367d98a5b49b4
SHA256

2922b5cec1af1aa38e62b79f1b6618c7e110bee195c1defe6a642f320954b141
SHA512

1793f07462b2fba3c3a93365175f2dffb978fb4696535540897194ae0dd4ac3442ca8d29fdc53b3412448856003dc0b05611b6ac6cf30bf3726a899a9f59b04f
SSDEEP

1536:ROLrNLj8qgCSnfadnBTITmG49afNLj8qgCSnfaddLO:ALrNLrtdnBMl49afNLrtddC

Score

10^/10

guloader discovery downloader

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=10FzFkYCZotTZUmUFkblyfcqV3Pl8H5cS

xor.base64

Signatures

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
12	drive.google.com
13	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
408	Avis de virement.exe
4232	Avis de virement.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 408 set thread context of 4232	408	Avis de virement.exe	82

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	Avis de virement.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Avis de virement.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
408	Avis de virement.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
408	Avis de virement.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 408 wrote to memory of 4232	408	Avis de virement.exe	82
PID 408 wrote to memory of 4232	408	Avis de virement.exe	82
PID 408 wrote to memory of 4232	408	Avis de virement.exe	82
PID 408 wrote to memory of 4232	408	Avis de virement.exe	82

C:\Users\Admin\AppData\Local\Temp\Avis de virement.exe
"C:\Users\Admin\AppData\Local\Temp\Avis de virement.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:408
- C:\Users\Admin\AppData\Local\Temp\Avis de virement.exe
  "C:\Users\Admin\AppData\Local\Temp\Avis de virement.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

memory/408-2-0x0000000002230000-0x000000000223B000-memory.dmp

Filesize
44KB

Download
memory/408-3-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/408-7-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/408-6-0x0000000002230000-0x000000000223B000-memory.dmp

Filesize
44KB

Download
memory/4232-4-0x0000000000400000-0x000000000055D000-memory.dmp

Filesize
1.4MB

Download
memory/4232-8-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download