guloader | 28c1582f21d12822446d835ba2043a858f21cd569b163022e345308cc5b6552f

Analysis

max time kernel
141s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/02/2025, 02:16

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General

Target
BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe
Size 823KB
Sample250228-cqabbsxtcs
SHA256 68c8ef0e9b37380e0111fc58705884d4f5aa491e25270a2608aaf4568fa98b1f
MD5 5c828d093e5e944176ad0ec6962e0bcb
SHA1 e92496a462ca1eb63938e49b434699a6bafbf043
SHA512 ec303589511bd8a916655c7b84ae83a2575c169733fc43475c27a6b79b4afd2f36999011d7048cefe7eb291bc0af05d66284679664b75434c2a0385657f8cfa2
SSDEEP 24576:fXrqImBCUkwIzhdQYEynSzMB2nUmVLj3pboR9Kbl13:fWIS5YXSU5kj5bow5F
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\verdenshistoriske\moschidae.Law230	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2852	2780	WerFault.exe	30

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	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2780	2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	30
PID 2516 wrote to memory of 2780	2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	30
PID 2516 wrote to memory of 2780	2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	30
PID 2516 wrote to memory of 2780	2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	30
PID 2516 wrote to memory of 2780	2516	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	30
PID 2780 wrote to memory of 2852	2780	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	31
PID 2780 wrote to memory of 2852	2780	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	31
PID 2780 wrote to memory of 2852	2780	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	31
PID 2780 wrote to memory of 2852	2780	BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe	31

C:\Users\Admin\AppData\Local\Temp\BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Users\Admin\AppData\Local\Temp\BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\BANK SLIP_TT COPY_23340636300773456864-2-20-2024_pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2780 -s 104
    3⤵
    - Program crash
    PID:2852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

System.dll

Path \Users\Admin\AppData\Local\Temp\nst8661.tmp\System.dll
Size 11KB
SHA256 4ff9b2678d698677c5d9732678f9cf53f17290e09d053691aac4cc6e6f595cbe
MD5 3e6bf00b3ac976122f982ae2aadb1c51
SHA1 caab188f7fdc84d3fdcb2922edeeb5ed576bd31d
SHA512 1286f05e6a7e6b691f6e479638e7179897598e171b52eb3a3dc0e830415251069d29416b6d1ffc6d7dce8da5625e1479be06db9b7179e7776659c5c1ad6aa706
SSDEEP 192:eP24sihno00Wfl97nH6T2enXwWobpWBTU4VtHT7dmN35OlbSl:T8QIl975eXqlWBrz7YLOlb
MD5 SHA1 SHA512 SSDEEP

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memory/2516-25-0x00000000034A0000-0x000000000657A000-memory.dmp

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memory/2516-26-0x00000000770D1000-0x00000000771D2000-memory.dmp

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memory/2516-27-0x00000000034A0000-0x000000000657A000-memory.dmp

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memory/2516-28-0x00000000770D0000-0x0000000077279000-memory.dmp

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memory/2780-29-0x0000000001470000-0x000000000454A000-memory.dmp

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memory/2780-30-0x0000000000400000-0x0000000001462000-memory.dmp

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memory/2780-31-0x0000000000400000-0x0000000001462000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads