guloader | 48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
27/07/2026, 04:31

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe
Size 1.2MB
Sample260727-e5vxpahb96
SHA256 48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340
MD5 a03ca2d71feb691db1ce725b9983739d
SHA1 be86d6d149b0b814c45c71131aabdd6375b955d2
SHA512 f3dd02b35631448036b00ab72f539d0dd7dceae9a352c2a79c2f9f9a3e067a95af97e3a735597c4d837d4007c88fe77b1553e8ea58e9449ff5673838113b313e
SSDEEP 24576:Lo0blzGT6ZmeCpRrFH8JmC+KlUunOKZQYuObYX2/tqJahTuIk:ciURrR8YC+MUuJZww3VxE
TLSH
T1D345D09CA8FF4497D77D3A70FBE764794A9392BAE2F22A6A357540214F52F000D0B523
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
2776	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2776	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\upbbore.txt	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1712	1496	WerFault.exe	88

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	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2776	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2664	2776	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe	87
PID 2776 wrote to memory of 1496	2776	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe	88
PID 2776 wrote to memory of 1496	2776	48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe	88

C:\Users\Admin\AppData\Local\Temp\48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe
"C:\Users\Admin\AppData\Local\Temp\48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.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:2776
- C:\Users\Admin\AppData\Local\Temp\48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe
  "C:\Users\Admin\AppData\Local\Temp\48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe"
  2⤵
  PID:2664
- C:\Users\Admin\AppData\Local\Temp\48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe
  "C:\Users\Admin\AppData\Local\Temp\48a0c3b93362dae744c054e94cd1e62f6e02e5f0ae8b3b48ae0ca24c5da51340.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1496
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1496 -s 416
    3⤵
    - Program crash
    PID:1712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1496 -ip 1496
1⤵
PID:3536

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

Replay Monitor

Loading Replay Monitor...

Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nseB572.tmp\System.dll
Size 12KB
SHA256 6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba
MD5 8cf2ac271d7679b1d68eefc1ae0c5618
SHA1 7cc1caaa747ee16dc894a600a4256f64fa65a9b8
SHA512 ce828fb9ecd7655cc4c974f78f209d3326ba71ced60171a45a437fc3fff3bd0d69a0997adaca29265c7b5419bdea2b17f8cc8ceae1b8ce6b22b7ed9120bb5ad3
SSDEEP 192:BenY0qWTlt70IAj/lQ0sEWc/wtYbBH2aDybC7y+XB9IwL:B8+Qlt70Fj/lQRY/9VjjlL
TLSH
T121427D1193B089F2F590593805A67F2A6FBEAC6C27E44963CFE345853D702DFA47A243
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1496-16-0x0000000001710000-0x0000000002D1A000-memory.dmp

Download

memory/2776-13-0x00000000044C0000-0x0000000005ACA000-memory.dmp

Download

memory/2776-14-0x0000000074075000-0x0000000074076000-memory.dmp

Download

memory/2776-15-0x00000000044C0000-0x0000000005ACA000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads