guloader | d9184f69e0f7b2c1d16d10db1249b6c2eb0a2f6d43d25b7d404918886048e19a

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04/03/2025, 01:58

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General

Target

Sales Contract TQR-379479250986497-2025_pdf.exe
Size

988KB
MD5

5ede8d1d4284eb332ccd20188b48207d
SHA1

78c76150c0eaeb08ae5578cdb0f91830d88ce965
SHA256

990cef1d7ac4e353395869661920a5d3f7a652fcc2cb2f439ed08b1503627aee
SHA512

ceb574e05accd491921ee7433073d6ed52a0bc9d3e97aaae97cdb8137eb78ffa8032f059b66beda31e7e57e1254f9ef7f2a243cecba7124063917f3346edcdb9
SSDEEP

24576:/XyXoL3JzSdTTuORm1af+Codlk9q5Wfwg:vWoDJ+dFRm1a9giq5gwg

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
2796	Sales Contract TQR-379479250986497-2025_pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2796	Sales Contract TQR-379479250986497-2025_pdf.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\gavebrevene.ini	Sales Contract TQR-379479250986497-2025_pdf.exe
File created	C:\Windows\resources\0409\shaksheer\onymancy.lnk	Sales Contract TQR-379479250986497-2025_pdf.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
1412	2996	WerFault.exe	31

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	Sales Contract TQR-379479250986497-2025_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sales Contract TQR-379479250986497-2025_pdf.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2796	Sales Contract TQR-379479250986497-2025_pdf.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 2996	2796	Sales Contract TQR-379479250986497-2025_pdf.exe	31
PID 2796 wrote to memory of 2996	2796	Sales Contract TQR-379479250986497-2025_pdf.exe	31
PID 2796 wrote to memory of 2996	2796	Sales Contract TQR-379479250986497-2025_pdf.exe	31
PID 2796 wrote to memory of 2996	2796	Sales Contract TQR-379479250986497-2025_pdf.exe	31
PID 2796 wrote to memory of 2996	2796	Sales Contract TQR-379479250986497-2025_pdf.exe	31
PID 2996 wrote to memory of 1412	2996	Sales Contract TQR-379479250986497-2025_pdf.exe	32
PID 2996 wrote to memory of 1412	2996	Sales Contract TQR-379479250986497-2025_pdf.exe	32
PID 2996 wrote to memory of 1412	2996	Sales Contract TQR-379479250986497-2025_pdf.exe	32
PID 2996 wrote to memory of 1412	2996	Sales Contract TQR-379479250986497-2025_pdf.exe	32

C:\Users\Admin\AppData\Local\Temp\Sales Contract TQR-379479250986497-2025_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Sales Contract TQR-379479250986497-2025_pdf.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:2796
- C:\Users\Admin\AppData\Local\Temp\Sales Contract TQR-379479250986497-2025_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Sales Contract TQR-379479250986497-2025_pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2996
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2996 -s 104
    3⤵
    - Program crash
    PID:1412

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

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsoF52A.tmp\System.dll

Filesize
11KB

MD5
3e6bf00b3ac976122f982ae2aadb1c51

SHA1
caab188f7fdc84d3fdcb2922edeeb5ed576bd31d

SHA256
4ff9b2678d698677c5d9732678f9cf53f17290e09d053691aac4cc6e6f595cbe

SHA512
1286f05e6a7e6b691f6e479638e7179897598e171b52eb3a3dc0e830415251069d29416b6d1ffc6d7dce8da5625e1479be06db9b7179e7776659c5c1ad6aa706

Download Submit
memory/2796-15-0x0000000077281000-0x0000000077382000-memory.dmp

Filesize
1.0MB

Download
memory/2796-16-0x0000000077280000-0x0000000077429000-memory.dmp

Filesize
1.7MB

Download
memory/2996-18-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2996-17-0x0000000001470000-0x0000000004957000-memory.dmp

Filesize
52.9MB

Download
memory/2996-20-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download