guloader | 033005fe6ffc1a0ad4029cf3591476a9c11f2e6481f903f95b0ed2e00c643d94

Analysis

max time kernel
141s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20250410-en
resource tags

arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
submitted
16/04/2025, 13:06

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General

Target

70%Final Payment Confirmation - PFI_025.exe
Size

731KB
MD5

859be39f2dcd41519182d25971bf91be
SHA1

9aba248ad8923d1f0d0912c0415d1b570013f093
SHA256

033005fe6ffc1a0ad4029cf3591476a9c11f2e6481f903f95b0ed2e00c643d94
SHA512

680c76e59fd80768931da65e252444f32d839db50b4647c55ee9b5610aeb42d1e0843c42c06387dfc826543c10c90cc429820bfd12f6f344787c383a55df640b
SSDEEP

12288:iGV3sYdlK+C3TvBPUU557mrQHCsMcg0AeDK07c8owRudjaME/LxG6ODhflE3gX/l:iGV3X/tk5pH7m2NbgNeDKWPudjaME/+p

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
5928	70%Final Payment Confirmation - PFI_025.exe

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

Web Service

T1102

flow	ioc
1	drive.google.com
2	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5928	70%Final Payment Confirmation - PFI_025.exe
4784	70%Final Payment Confirmation - PFI_025.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\konfigureredes\peag.ini	70%Final Payment Confirmation - PFI_025.exe
File opened for modification	C:\Windows\resources\0409\rancorously.ini	70%Final Payment Confirmation - PFI_025.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	70%Final Payment Confirmation - PFI_025.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	70%Final Payment Confirmation - PFI_025.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5928	70%Final Payment Confirmation - PFI_025.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5928 wrote to memory of 4784	5928	70%Final Payment Confirmation - PFI_025.exe	78
PID 5928 wrote to memory of 4784	5928	70%Final Payment Confirmation - PFI_025.exe	78
PID 5928 wrote to memory of 4784	5928	70%Final Payment Confirmation - PFI_025.exe	78
PID 5928 wrote to memory of 4784	5928	70%Final Payment Confirmation - PFI_025.exe	78

C:\Users\Admin\AppData\Local\Temp\70%Final Payment Confirmation - PFI_025.exe
"C:\Users\Admin\AppData\Local\Temp\70%Final Payment Confirmation - PFI_025.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:5928
- C:\Users\Admin\AppData\Local\Temp\70%Final Payment Confirmation - PFI_025.exe
  "C:\Users\Admin\AppData\Local\Temp\70%Final Payment Confirmation - PFI_025.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4784

Network

MITRE ATT&CK Enterprise v16

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

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
11KB

MD5
6f5257c0b8c0ef4d440f4f4fce85fb1b

SHA1
b6ac111dfb0d1fc75ad09c56bde7830232395785

SHA256
b7ccb923387cc346731471b20fc3df1ead13ec8c2e3147353c71bb0bd59bc8b1

SHA512
a3cc27f1efb52fb8ecda54a7c36ada39cefeabb7b16f2112303ea463b0e1a4d745198d413eebb3551e012c84a20dcdf4359e511e51bc3f1a60b13f1e3bad1aa8

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsrBCAB.tmp\archostenosis.lnk

Filesize
1KB

MD5
f501eb2b68e90da2361e4a1ef879ce66

SHA1
3e4b5c64077439a4d8bb9db0ace439abc889b738

SHA256
f3ef98f566d5ad118beff49b532185eeaa55aaf84f14d728a14818726cf296eb

SHA512
1fcd3ebf668689da1e5543425cafa02cb164a8444682ce7d14b03d7536d0d7600177dca9b626e83b40a47c77d5f8adbcc572607415f85a5d8a8a7a3eada5878b

Download Submit
C:\Windows\Resources\0409\rancorously.ini

Filesize
36B

MD5
9f26c215597c6d215332812cb96823de

SHA1
e38d33b223894281f48585d5ee4a3cfaa8a69b2f

SHA256
31ce0e20e2e3d6047008df8b1186381728ecbe32cbdb1d8528e966c6ff79a8be

SHA512
cf84962ab1e33b580ec7acbc848f944ca2da16a21743225d60dd759d4df09de93e05255e64de5edf1369aa7ad8647a3cc748ab7247b215939f3b46ca493eeb0a

Download Submit
memory/4784-362-0x0000000000400000-0x0000000001717000-memory.dmp

Filesize
19.1MB

Download
memory/4784-361-0x0000000001720000-0x00000000069B9000-memory.dmp

Filesize
82.6MB

Download
memory/4784-363-0x00007FFBF5F20000-0x00007FFBF6129000-memory.dmp

Filesize
2.0MB

Download
memory/4784-372-0x0000000000400000-0x0000000001717000-memory.dmp

Filesize
19.1MB

Download
memory/4784-373-0x00007FFBF5F20000-0x00007FFBF6129000-memory.dmp

Filesize
2.0MB

Download
memory/5928-359-0x00007FFBF5F21000-0x00007FFBF604A000-memory.dmp

Filesize
1.2MB

Download
memory/5928-360-0x00007FFBF5F20000-0x00007FFBF6129000-memory.dmp

Filesize
2.0MB

Download