guloader | fa3f7a4c1502f499a481b56f5e7c185876626e3d00110d84e09652f98b776aff

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2024 09:49

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General

Target

6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe
Size

156KB
MD5

d6d75850a2ec8570b1e0217dde3b6ac7
SHA1

a695229c100ede35204da2081fff6769f4d30ecb
SHA256

6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343
SHA512

2d9d2b6397498e9179b514fa5796f1297f128f658dec5c9635e12c91abcbe10ecd55b31072cec9c90514a120ca41b39e540400895b4aa2ae5ba87baac00b2bc4
SSDEEP

1536:nhoA+BcD5sIa36HMFlS31U7lTve2Ya2ChJKzOuIzGv:CA+mD5s13/HTvZnEJ

Score

10^/10

guloader discovery downloader guloader

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=1pWIXSVxobqZoSDMKYuItyAIYUIZhxr8a

xor.base64

Signatures

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

Guloader payload 2 IoCs

guloader

Processes:

resource	yara_rule
behavioral22/memory/2640-2-0x00000000020C0000-0x00000000020D0000-memory.dmp	family_guloader
behavioral22/memory/2640-4-0x00000000020C0000-0x00000000020D0000-memory.dmp	family_guloader

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

pid	Process
2640	6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
4208	2640	WerFault.exe	81

System Location Discovery: System Language Discovery 1 TTPs 1 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

Processes:

6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

pid	Process
2640	6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe

description	pid	Process	procid_target
PID 2640 wrote to memory of 2956	2640	6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe	87
PID 2640 wrote to memory of 2956	2640	6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe	87
PID 2640 wrote to memory of 2956	2640	6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe	87

C:\Users\Admin\AppData\Local\Temp\6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe
"C:\Users\Admin\AppData\Local\Temp\6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\6b06c25fc6181adf110e8109550698897836b5c429fe9b013b2e51a3abc05343.exe"
  2⤵
  PID:2956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2640 -s 788
  2⤵
  - Program crash
  PID:4208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2640 -ip 2640
1⤵
PID:4192

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

Exfiltration

Impact

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Downloads

memory/2640-2-0x00000000020C0000-0x00000000020D0000-memory.dmp

Filesize
64KB

Download
memory/2640-3-0x0000000077741000-0x0000000077861000-memory.dmp

Filesize
1.1MB

Download
memory/2640-4-0x00000000020C0000-0x00000000020D0000-memory.dmp

Filesize
64KB

Download