guloader | 2be3659866496d1f6eff4e43568fba5e61414378684b95a20c5c2bd5ef4d45d2

Analysis

max time kernel
144s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2025, 02:24

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General

Target

PO-9AHFFDH-H4747849.exe
Size

675KB
MD5

7dd465a931791e7bed441c1496e45c1c
SHA1

7c7887c183bedbb06390e8b6bbccb87cd0e39491
SHA256

cb26a50bee3e03bc5563d78899ec5cad699ac135308461d6281e3eff868f16d0
SHA512

fbb45f9f87a89dbfb5b33ffd40e123a95922e05c6fc0db2f200c300951c6e720d0ec84b4661e4fa359cfda573c58829266a2fc60386bce6e80f99fbf10079d6c
SSDEEP

12288:GFgYxnPtmAhtPoOhRBwlA+OLLU+ivZjrr/TfqJC8g7s3XSo:aVhcGRBwlARLLoPzrqJC8g7GCo

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
4432	PO-9AHFFDH-H4747849.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4432	PO-9AHFFDH-H4747849.exe
3808	PO-9AHFFDH-H4747849.exe

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

System Information Discovery
T1082

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	PO-9AHFFDH-H4747849.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-9AHFFDH-H4747849.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4432	PO-9AHFFDH-H4747849.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 3808	4432	PO-9AHFFDH-H4747849.exe	88
PID 4432 wrote to memory of 3808	4432	PO-9AHFFDH-H4747849.exe	88
PID 4432 wrote to memory of 3808	4432	PO-9AHFFDH-H4747849.exe	88
PID 4432 wrote to memory of 3808	4432	PO-9AHFFDH-H4747849.exe	88

C:\Users\Admin\AppData\Local\Temp\PO-9AHFFDH-H4747849.exe
"C:\Users\Admin\AppData\Local\Temp\PO-9AHFFDH-H4747849.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Users\Admin\AppData\Local\Temp\PO-9AHFFDH-H4747849.exe
  "C:\Users\Admin\AppData\Local\Temp\PO-9AHFFDH-H4747849.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3808

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsjC2D5.tmp\System.dll

Filesize
11KB

MD5
0063d48afe5a0cdc02833145667b6641

SHA1
e7eb614805d183ecb1127c62decb1a6be1b4f7a8

SHA256
ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

SHA512
71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

Download Submit
memory/3808-28-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3808-27-0x0000000001660000-0x00000000057E8000-memory.dmp

Filesize
65.5MB

Download
memory/3808-29-0x00000000774C8000-0x00000000774C9000-memory.dmp

Filesize
4KB

Download
memory/3808-30-0x00000000774E5000-0x00000000774E6000-memory.dmp

Filesize
4KB

Download
memory/3808-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3808-32-0x0000000077441000-0x0000000077561000-memory.dmp

Filesize
1.1MB

Download
memory/4432-24-0x0000000077441000-0x0000000077561000-memory.dmp

Filesize
1.1MB

Download
memory/4432-26-0x0000000074134000-0x0000000074135000-memory.dmp

Filesize
4KB

Download
memory/4432-25-0x0000000077441000-0x0000000077561000-memory.dmp

Filesize
1.1MB

Download