guloader | b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc

Analysis

max time kernel
150s
max time network
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/07/2026, 23:44

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General

Target
b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
Size 224KB
Sample260702-3rc2qads5p
SHA256 b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc
MD5 8e584b7f95ee67a337c103260f122413
SHA1 d0e187f73008bdce2ff5a40312cb32d13ed0d69c
SHA512 91f77142be5c58f8927117eb28fd85aa9cda7d956f9b3d16a0e8267c2a873b5c4d290902973114886f8f1e0eba6a7eeb7e617ddc32efcc20381cc41bce35ca45
SSDEEP 6144:RMm4CCBM3hU/hFaslnT4gHo9ROhUvUmoJRp5na6u:RMwNRMhFaslnTrlhUcmU5at
TLSH
T1B52401046760D05BE95585B0C97BAEF81EE0AD22DEA0875B23D47F0D7939BC1DC2A329
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
2224	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2224	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
548	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.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	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2224	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 3920	2224	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe	89
PID 2224 wrote to memory of 548	2224	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe	90
PID 2224 wrote to memory of 548	2224	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe	90
PID 548 wrote to memory of 2488	548	b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe	91

C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
"C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
  "C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe"
  2⤵
  PID:3920
- C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
  "C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:548
- - C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe
    "C:\Users\Admin\AppData\Local\Temp\b481b6034d399f7f85877662838d4cd461a8ef5ae694b2cd44fcd9614b8842fc.exe"
    3⤵
    PID:2488

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\nsmD5F9.tmp\System.dll
Size 12KB
SHA256 acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506
MD5 6e55a6e7c3fdbd244042eb15cb1ec739
SHA1 070ea80e2192abc42f358d47b276990b5fa285a9
SHA512 2d504b74da38edc967e3859733a2a9cacd885db82f0ca69bfb66872e882707314c54238344d45945dc98bae85772aceef71a741787922d640627d3c8ae8f1c35
SSDEEP 192:MenY0qWTlt70IAj/lQ0sEWc/wtYbBH2aDybC7y+XBaIwL:M8+Qlt70Fj/lQRY/9VjjgL
TLSH
T1BE428D1193B089F2F590593805A67F2A6FBEAC5C27E44A63CFE345853D702DFA47A243
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/548-18-0x0000000001750000-0x00000000041C0000-memory.dmp

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memory/548-20-0x0000000000460000-0x0000000001746000-memory.dmp

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memory/548-21-0x0000000001750000-0x00000000041C0000-memory.dmp

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memory/2224-16-0x0000000006140000-0x0000000008BB0000-memory.dmp

Download

memory/2224-17-0x0000000073755000-0x0000000073756000-memory.dmp

Download

memory/2224-19-0x0000000006140000-0x0000000008BB0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads