guloader | 49260a07ff0d5c06efdfc3985bcc44d6df5cf2a56810f01c3243684b950264cc

Analysis

max time kernel
147s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
24/09/2024, 11:56

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General

Target

1116543711892424.scr
Size

1.0MB
MD5

4648a0278bd003c324fcd7e7779dcf99
SHA1

401623540094e2eef531d366d8c155c1d3d72abb
SHA256

49260a07ff0d5c06efdfc3985bcc44d6df5cf2a56810f01c3243684b950264cc
SHA512

198d5db4bb4f612645786c27cdacb26665db4099cd8580091adf86d9d84fc16278d3a87c410912cb4968c630dca1cc14432551673fb7653ad83f28b601720da5
SSDEEP

12288:x9XMnptEWw7TAIh1LSw84bjZgyrMNAzP6RtRQXl51KBkpw8+QZ0:rcnsWw7sIh1uQba4mRjQVP2UkV

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2496	1116543711892424.scr

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2496	1116543711892424.scr
116	1116543711892424.scr

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2496 set thread context of 116	2496	1116543711892424.scr	82

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\sorteringsordenens.lnk	1116543711892424.scr
File opened for modification	C:\Program Files (x86)\sorteringsordenens.lnk	1116543711892424.scr

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	1116543711892424.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1116543711892424.scr

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2496	1116543711892424.scr

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 116	2496	1116543711892424.scr	82
PID 2496 wrote to memory of 116	2496	1116543711892424.scr	82
PID 2496 wrote to memory of 116	2496	1116543711892424.scr	82
PID 2496 wrote to memory of 116	2496	1116543711892424.scr	82
PID 2496 wrote to memory of 116	2496	1116543711892424.scr	82

C:\Users\Admin\AppData\Local\Temp\1116543711892424.scr
"C:\Users\Admin\AppData\Local\Temp\1116543711892424.scr" /S
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Users\Admin\AppData\Local\Temp\1116543711892424.scr
  "C:\Users\Admin\AppData\Local\Temp\1116543711892424.scr" /S
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:116

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

C:\Program Files (x86)\sorteringsordenens.lnk

Filesize
902B

MD5
610d4c4d42ada0e155ebdaaf4108e012

SHA1
3e81cf599a883b7b7f81abd95480366abb251187

SHA256
6a81977175b3df98578072b4a2646a7d7f8518a73d9b14eb1d8d1cf80cd015fd

SHA512
4f0eb5ec2212f6ba66d0aa352c092c1cfa5b6cb6a917da1df52e8f32922e6b86e9d282eb28b01ccd9ffd8afc796f8d78ddec2e09963b727837125cd53c20c227

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsbC8FE.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

Download Submit
memory/116-287-0x0000000001710000-0x0000000002E75000-memory.dmp

Filesize
23.4MB

Download
memory/116-288-0x0000000077501000-0x0000000077621000-memory.dmp

Filesize
1.1MB

Download
memory/116-289-0x0000000077588000-0x0000000077589000-memory.dmp

Filesize
4KB

Download
memory/116-290-0x00000000004B0000-0x0000000001704000-memory.dmp

Filesize
18.3MB

Download
memory/116-291-0x0000000077501000-0x0000000077621000-memory.dmp

Filesize
1.1MB

Download
memory/2496-283-0x0000000002870000-0x0000000003FD5000-memory.dmp

Filesize
23.4MB

Download
memory/2496-284-0x0000000077501000-0x0000000077621000-memory.dmp

Filesize
1.1MB

Download
memory/2496-285-0x0000000002870000-0x0000000003FD5000-memory.dmp

Filesize
23.4MB

Download
memory/2496-286-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2496-297-0x0000000002870000-0x0000000003FD5000-memory.dmp

Filesize
23.4MB

Download