guloader | b3cc4e1f09aa77a31e7071f2a505bfe5f13f9ec3cb73997b0d4a5ac36fc710fa

Analysis

max time kernel
92s
max time network
147s
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

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

$70k MT 30JAN.exe
Size

68KB
MD5

46bbf5e855bc75bac0102f64ef89d020
SHA1

9ae433aa63784d9ca7d614859bdd27fd1f377b68
SHA256

f51c1470741a6272f90a147fc717bbbc8808a92107e7c16f7c1ff57c69ee2791
SHA512

30072e2a142563d111d3671f055da9a9ed075ae9f6809bbb85136d923112d3b4e4d9d877f6fb470d0170823ef219e70a0400ef868e9454d340055e83aa5e0599
SSDEEP

768:kQOK55sy7IbEfUMMuqe+bQ8u4OK55sy7IbEfUM:kXKn95InnbQ8GKn95

Score

10^/10

guloader discovery downloader guloader

Malware Config

Signatures

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

Guloader payload 2 IoCs

guloader

resource	yara_rule
behavioral6/memory/3744-2-0x0000000002080000-0x0000000002089000-memory.dmp	family_guloader
behavioral6/memory/2460-4-0x0000000001300000-0x0000000001400000-memory.dmp	family_guloader

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

Web Service

T1102

flow	ioc
9	drive.google.com
10	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3744	$70k MT 30JAN.exe
2460	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3744 set thread context of 2460	3744	$70k MT 30JAN.exe	81

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	$70k MT 30JAN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3744	$70k MT 30JAN.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3744	$70k MT 30JAN.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3744 wrote to memory of 2460	3744	$70k MT 30JAN.exe	81
PID 3744 wrote to memory of 2460	3744	$70k MT 30JAN.exe	81
PID 3744 wrote to memory of 2460	3744	$70k MT 30JAN.exe	81
PID 3744 wrote to memory of 2460	3744	$70k MT 30JAN.exe	81

C:\Users\Admin\AppData\Local\Temp\$70k MT 30JAN.exe
"C:\Users\Admin\AppData\Local\Temp\$70k MT 30JAN.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:3744
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\$70k MT 30JAN.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2460

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

Loading Replay Monitor...

Downloads

memory/2460-5-0x0000000077671000-0x0000000077791000-memory.dmp

Filesize
1.1MB

Download
memory/2460-4-0x0000000001300000-0x0000000001400000-memory.dmp

Filesize
1024KB

Download
memory/3744-2-0x0000000002080000-0x0000000002089000-memory.dmp

Filesize
36KB

Download
memory/3744-3-0x0000000077671000-0x0000000077791000-memory.dmp

Filesize
1.1MB

Download
memory/3744-15-0x0000000002080000-0x0000000002089000-memory.dmp

Filesize
36KB

Download
memory/3744-16-0x0000000002080000-0x0000000002089000-memory.dmp

Filesize
36KB

Download