guloader | 1281c7edbd3003e675c2dcfe9087405813f1bce2edb1af8f5551b4dcb120bbc7

Analysis

max time kernel
148s
max time network
155s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
11-02-2025 15:32

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General

Target

Purchase Order_FEB 2025_pdf.exe
Size

1.0MB
MD5

9054f467db1180f7991ba2d42a754f59
SHA1

104f702513021faf28cf4e641b12e21fb5f1e4b6
SHA256

251ad36ce2fa611f2f94c6a90fddca59d881e48c8a4fd3ef892d803996742e12
SHA512

91159fc0b760c602e8f66c79dff80428a36b652ffc63495222d0665256cbab3307b3cf498a3eea0aed8a7ae025c3f8c516aa246a9583c93b0d48bef3cdef5731
SSDEEP

24576:LzOEC045stTUHEd6OQfazVGfCANG5Hgaph:eEeKtTUHo6OQSrXNg4

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 2 IoCs

pid	Process
1820	Purchase Order_FEB 2025_pdf.exe
1820	Purchase Order_FEB 2025_pdf.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3040	Purchase Order_FEB 2025_pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1820	Purchase Order_FEB 2025_pdf.exe
3040	Purchase Order_FEB 2025_pdf.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	Purchase Order_FEB 2025_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Purchase Order_FEB 2025_pdf.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1820	Purchase Order_FEB 2025_pdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	Purchase Order_FEB 2025_pdf.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 3040	1820	Purchase Order_FEB 2025_pdf.exe	30
PID 1820 wrote to memory of 3040	1820	Purchase Order_FEB 2025_pdf.exe	30
PID 1820 wrote to memory of 3040	1820	Purchase Order_FEB 2025_pdf.exe	30
PID 1820 wrote to memory of 3040	1820	Purchase Order_FEB 2025_pdf.exe	30
PID 1820 wrote to memory of 3040	1820	Purchase Order_FEB 2025_pdf.exe	30

C:\Users\Admin\AppData\Local\Temp\Purchase Order_FEB 2025_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order_FEB 2025_pdf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Users\Admin\AppData\Local\Temp\Purchase Order_FEB 2025_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order_FEB 2025_pdf.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3040

Network

MITRE ATT&CK Enterprise v15

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsjCE48.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/1820-17-0x0000000077BE1000-0x0000000077CE2000-memory.dmp

Filesize
1.0MB

Download
memory/1820-18-0x0000000077BE0000-0x0000000077D89000-memory.dmp

Filesize
1.7MB

Download
memory/3040-19-0x0000000001530000-0x0000000006D50000-memory.dmp

Filesize
88.1MB

Download
memory/3040-20-0x0000000077BE0000-0x0000000077D89000-memory.dmp

Filesize
1.7MB

Download
memory/3040-21-0x00000000004C0000-0x0000000001522000-memory.dmp

Filesize
16.4MB

Download
memory/3040-47-0x00000000004C0000-0x0000000001522000-memory.dmp

Filesize
16.4MB

Download
memory/3040-48-0x0000000001530000-0x0000000006D50000-memory.dmp

Filesize
88.1MB

Download
memory/3040-49-0x00000000004C0000-0x0000000000520000-memory.dmp

Filesize
384KB

Download
memory/3040-50-0x0000000039D00000-0x0000000039D98000-memory.dmp

Filesize
608KB

Download
memory/3040-51-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-76-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-96-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-94-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-92-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-90-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-88-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-86-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-84-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-82-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-80-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-78-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-74-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-72-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-70-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-68-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-66-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-64-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-63-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-60-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-58-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-56-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-54-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-52-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-108-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-106-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-104-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-102-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-100-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-98-0x0000000039D00000-0x0000000039D92000-memory.dmp

Filesize
584KB

Download
memory/3040-2117-0x0000000037760000-0x00000000377AC000-memory.dmp

Filesize
304KB

Download
memory/3040-2116-0x0000000037380000-0x00000000373AC000-memory.dmp

Filesize
176KB

Download