guloader | e1e0b4d13fef5e47cfed1e8ceb1bfd8175799fe22ad8f18c877d85ed5a72aab8

Analysis

max time kernel
94s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-09-2024 21:10

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

document.exe
Size

88KB
MD5

3a29ec5e78273a5d9497afe943102c89
SHA1

b14457eed801b28dde491f6c8879def4df63ec42
SHA256

230d41b01617fcee8d5a438a5df4bc75910be2aa65e173ce11f7b1ed51c591a1
SHA512

10de5acf84a34818c35f267982b6acd131790568b37991cd8993b449d5d7a2c6403626b5c2cea58942a33a7bf1691c8850a625022408abd88ca4e034f626835f
SSDEEP

1536:L0pjfh9/kfVbJyrFDDmr7UcFETuEZsZyVoNrFDDmr7UclVbifh9/k:wXiVSFDD8nmTuEZsYEFDD8nlV+X

Score

10^/10

guloader discovery downloader guloader

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=1_C89SIhHOlv9l9ZnU366hDceUJ5YArTR

xor.base64

Signatures

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

Guloader payload 2 IoCs

guloader

resource	yara_rule
behavioral2/memory/4748-2-0x00000000021F0000-0x00000000021F8000-memory.dmp	family_guloader
behavioral2/memory/3120-4-0x00000000013A0000-0x00000000014A0000-memory.dmp	family_guloader

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

Web Service

T1102

flow	ioc
14	drive.google.com
15	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4748	document.exe
3120	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4748 set thread context of 3120	4748	document.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	document.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4748	document.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4748	document.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4748 wrote to memory of 3120	4748	document.exe	82
PID 4748 wrote to memory of 3120	4748	document.exe	82
PID 4748 wrote to memory of 3120	4748	document.exe	82
PID 4748 wrote to memory of 3120	4748	document.exe	82

C:\Users\Admin\AppData\Local\Temp\document.exe
"C:\Users\Admin\AppData\Local\Temp\document.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:4748
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\document.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3120

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/3120-5-0x0000000077471000-0x0000000077591000-memory.dmp

Filesize
1.1MB

Download
memory/3120-4-0x00000000013A0000-0x00000000014A0000-memory.dmp

Filesize
1024KB

Download
memory/4748-2-0x00000000021F0000-0x00000000021F8000-memory.dmp

Filesize
32KB

Download
memory/4748-3-0x0000000077471000-0x0000000077591000-memory.dmp

Filesize
1.1MB

Download
memory/4748-15-0x00000000021F0000-0x00000000021F8000-memory.dmp

Filesize
32KB

Download
memory/4748-16-0x00000000021F0000-0x00000000021F8000-memory.dmp

Filesize
32KB

Download