guloader | a2be2bc2c4ca6b92631caf8ca4d8626225af2536d1497d8599cac376837532e2

Analysis

max time kernel
141s
max time network
151s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
28-07-2024 10:32

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General

Target

Draft HAWB.pdf.scr
Size

116KB
MD5

f3f56b99541ffaf22e58c42356d2d9f9
SHA1

2fba8478a48e39df1cf52219ee2517af1bc0214a
SHA256

61fa5ce594de537f26b6fe0da3ff9fec603df1af27c2b2ba89f2ee4a6c981e18
SHA512

1bc479a4dae2afd854eb3e4bbe3b97fa401c4dd71dfc1e571d5a1a3d9eb14056e126d3375a637c1543a798b389df4205c3748b11761d62362d56abd11288c467
SSDEEP

768:czNgrXUKsxOymfSXYr+sR6o+livTlTTTTRvVHOYTTTT4P/9gTTTTTTTTTTTTTTT9:czNguCfEu6s/VC9hUEBxc6hRi

Score

10^/10

guloader discovery downloader guloader persistence

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=1lwFHDodmljwVaOpWn8UOCTmaZ6GPgsim

xor.base64

Signatures

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

Guloader payload 1 IoCs

guloader

resource	yara_rule
behavioral1/memory/2300-2-0x00000000003D0000-0x00000000003DA000-memory.dmp	family_guloader

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Fremti5 = "C:\\Users\\Admin\\Fangster5\\tenementisev.exe"	RegAsm.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2300	Draft HAWB.pdf.scr
2728	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2300 set thread context of 2728	2300	Draft HAWB.pdf.scr	29

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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Draft HAWB.pdf.scr

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2300	Draft HAWB.pdf.scr

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2300	Draft HAWB.pdf.scr

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29
PID 2300 wrote to memory of 2728	2300	Draft HAWB.pdf.scr	29

C:\Users\Admin\AppData\Local\Temp\Draft HAWB.pdf.scr
"C:\Users\Admin\AppData\Local\Temp\Draft HAWB.pdf.scr" /S
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:2300
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\Draft HAWB.pdf.scr" /S
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

memory/2300-2-0x00000000003D0000-0x00000000003DA000-memory.dmp

Filesize
40KB

Download
memory/2300-4-0x0000000077840000-0x00000000779E9000-memory.dmp

Filesize
1.7MB

Download
memory/2300-3-0x0000000077841000-0x0000000077942000-memory.dmp

Filesize
1.0MB

Download
memory/2300-25-0x00000000003D0000-0x00000000003DA000-memory.dmp

Filesize
40KB

Download
memory/2300-26-0x00000000003D0000-0x00000000003DA000-memory.dmp

Filesize
40KB

Download
memory/2728-6-0x0000000077840000-0x00000000779E9000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads