guloader | b3cc4e1f09aa77a31e7071f2a505bfe5f13f9ec3cb73997b0d4a5ac36fc710fa

Analysis

max time kernel
93s
max time network
146s
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

20191107145436608.exe
Size

68KB
MD5

97393d9e6eaa2b3481cac21c96fbaeca
SHA1

5bdfc65074dcdad5f27039e68585d4f650f5d712
SHA256

de6adf588622a2f3a30bb2ba35c9a51d6d3a8ae854c145c1ea1815cc15172a24
SHA512

9d06803a8c8e0f2bdcf5a56f188055f0e5dfcd24231626e043c2bf06388ba8032d8f940b8ee5b60cb64ec3326ee9f2adef8f63a4a9d927038692fdbbb44520a6
SSDEEP

1536:IxAPHeWBb/FM7gKbYbY0yQnPMEQSyQtBb/FM7gKbYbY:MWE7gmQnPZQTQtE7g

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
behavioral10/memory/1732-2-0x0000000000600000-0x0000000000609000-memory.dmp	family_guloader
behavioral10/memory/3716-4-0x0000000001310000-0x0000000001410000-memory.dmp	family_guloader

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

Web Service

T1102

flow	ioc
15	drive.google.com
16	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1732	20191107145436608.exe
3716	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1732 set thread context of 3716	1732	20191107145436608.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	20191107145436608.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1732	20191107145436608.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1732	20191107145436608.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 3716	1732	20191107145436608.exe	82
PID 1732 wrote to memory of 3716	1732	20191107145436608.exe	82
PID 1732 wrote to memory of 3716	1732	20191107145436608.exe	82
PID 1732 wrote to memory of 3716	1732	20191107145436608.exe	82

C:\Users\Admin\AppData\Local\Temp\20191107145436608.exe
"C:\Users\Admin\AppData\Local\Temp\20191107145436608.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:1732
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\20191107145436608.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3716

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/1732-2-0x0000000000600000-0x0000000000609000-memory.dmp

Filesize
36KB

Download
memory/1732-3-0x0000000077AF1000-0x0000000077C11000-memory.dmp

Filesize
1.1MB

Download
memory/1732-15-0x0000000000600000-0x0000000000609000-memory.dmp

Filesize
36KB

Download
memory/1732-16-0x0000000077AF1000-0x0000000077C11000-memory.dmp

Filesize
1.1MB

Download
memory/1732-17-0x0000000000600000-0x0000000000609000-memory.dmp

Filesize
36KB

Download
memory/3716-4-0x0000000001310000-0x0000000001410000-memory.dmp

Filesize
1024KB

Download
memory/3716-5-0x0000000077AF1000-0x0000000077C11000-memory.dmp

Filesize
1.1MB

Download