guloader | 15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04

Analysis

max time kernel
148s
max time network
144s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
01/08/2026, 03:47

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General

Target
15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
Size 260KB
Sample260801-eb95hsdp9x
SHA256 15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04
MD5 a1b82f225e543e784438fec0fe7b5b28
SHA1 234eade4317f742c743f67c5c85952f49a63fdfb
SHA512 fc247edaaa13775a8124170b5e5d67320eb73cc87654c4c5eee972ff2d036861e2a37dbcf5635ec29d6049ff8dbcbd2afe0715dc98a86736053668c53109b35a
SSDEEP 6144:vMm4CCAd/4TGMXA6w+WjYdpQxItQhUY9w39ZZCS9WoUduv:vMw1d/o7XA6w+WIpjGhvOZvWoUdI
TLSH
T18B44028477D8D04FC16690701917ABBB6F6BFC5C1435824B2B34AF9D7B3A2C2692B391
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery downloader guloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
4088	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4088	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
1040	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Partipressens49\blunderer.gif	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.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	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4088	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 424	4088	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe	91
PID 4088 wrote to memory of 1040	4088	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe	92
PID 4088 wrote to memory of 1040	4088	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe	92
PID 1040 wrote to memory of 4684	1040	15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe	93

C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
"C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.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:4088
- C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
  "C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe"
  2⤵
  PID:424
- C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
  "C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1040
- - C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe
    "C:\Users\Admin\AppData\Local\Temp\15c7cf02ae7d2aac1a3d7eb5015d2f387ba3b820f315dc9799e7b847964dcc04.exe"
    3⤵
    PID:4684

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

Exfiltration

Impact

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Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsc47FE.tmp\System.dll
Size 12KB
SHA256 7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5
MD5 564bb0373067e1785cba7e4c24aab4bf
SHA1 7c9416a01d821b10b2eef97b80899d24014d6fc1
SHA512 22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472
SSDEEP 192:nenY0qWTlt70IAj/lQ0sEWc/wtYbBH2aDybC7y+XBDIwL:n8+Qlt70Fj/lQRY/9VjjfL
TLSH
T1F6427D1193B089F2F590593805A67F2A6FBEAC5C27E44963CFE345853D702DFA47A243
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1040-18-0x0000000001760000-0x0000000003827000-memory.dmp

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memory/1040-20-0x0000000000470000-0x0000000001756000-memory.dmp

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memory/1040-21-0x0000000001760000-0x0000000003827000-memory.dmp

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memory/4088-16-0x00000000057E0000-0x00000000078A7000-memory.dmp

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memory/4088-17-0x0000000074B45000-0x0000000074B46000-memory.dmp

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memory/4088-19-0x00000000057E0000-0x00000000078A7000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads