guloader | 033005fe6ffc1a0ad4029cf3591476a9c11f2e6481f903f95b0ed2e00c643d94

Analysis

max time kernel
142s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-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
3076	70%Final Payment Confirmation - PFI_025.exe

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

Web Service

T1102

flow	ioc
22	drive.google.com
23	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3076	70%Final Payment Confirmation - PFI_025.exe
3940	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\rancorously.ini	70%Final Payment Confirmation - PFI_025.exe
File opened for modification	C:\Windows\resources\0409\konfigureredes\peag.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
3076	70%Final Payment Confirmation - PFI_025.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 3940	3076	70%Final Payment Confirmation - PFI_025.exe	91
PID 3076 wrote to memory of 3940	3076	70%Final Payment Confirmation - PFI_025.exe	91
PID 3076 wrote to memory of 3940	3076	70%Final Payment Confirmation - PFI_025.exe	91
PID 3076 wrote to memory of 3940	3076	70%Final Payment Confirmation - PFI_025.exe	91

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:3076
- 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:3940

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\nsz77A3.tmp\System.dll

Filesize
11KB

MD5
6f5257c0b8c0ef4d440f4f4fce85fb1b

SHA1
b6ac111dfb0d1fc75ad09c56bde7830232395785

SHA256
b7ccb923387cc346731471b20fc3df1ead13ec8c2e3147353c71bb0bd59bc8b1

SHA512
a3cc27f1efb52fb8ecda54a7c36ada39cefeabb7b16f2112303ea463b0e1a4d745198d413eebb3551e012c84a20dcdf4359e511e51bc3f1a60b13f1e3bad1aa8

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsz77A3.tmp\archostenosis.lnk

Filesize
1KB

MD5
1665bd85b2ce3601455a79fe63d0a1f8

SHA1
3f3be54939174321205cc17a123978cff49e974c

SHA256
621cfeb74c36fb0a9871174464af9fe04ea89feb78e3d648c12dd67da9f08119

SHA512
12a25d133d61622cb38bcff9a98dc402b992252800cd13329913c54d8116fe19c7b88859615c116bdd7631609797ea4c323986facd3e1d7fd5471da88590f757

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

Filesize
36B

MD5
9f26c215597c6d215332812cb96823de

SHA1
e38d33b223894281f48585d5ee4a3cfaa8a69b2f

SHA256
31ce0e20e2e3d6047008df8b1186381728ecbe32cbdb1d8528e966c6ff79a8be

SHA512
cf84962ab1e33b580ec7acbc848f944ca2da16a21743225d60dd759d4df09de93e05255e64de5edf1369aa7ad8647a3cc748ab7247b215939f3b46ca493eeb0a

Download Submit
memory/3076-359-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/3076-361-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3076-360-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/3940-363-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3940-362-0x0000000001660000-0x00000000068F9000-memory.dmp

Filesize
82.6MB

Download
memory/3940-364-0x0000000077628000-0x0000000077629000-memory.dmp

Filesize
4KB

Download
memory/3940-365-0x0000000077645000-0x0000000077646000-memory.dmp

Filesize
4KB

Download
memory/3940-372-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3940-373-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download