guloader | 07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b

Analysis

max time kernel
116s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08/09/2024, 08:34

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General

Target

5516decfc8b4ca782e66470f274e7850N.exe
Size

524KB
MD5

5516decfc8b4ca782e66470f274e7850
SHA1

f11499f5fa5134f61a885f9805bb844fbd39fef0
SHA256

07e7c66e3c95feef851dbbf45dada43d8746ee2ca26768188e3c06f91b23e67b
SHA512

3fba54ce3e7b5d05999a72593718357c60a8f677d922f010f9a18b191732ac6c102b7db0e9df65cc178a195763c57a08672af5efecfd705929ddc6a68d2d0762
SSDEEP

12288:E5INMIx1otFZEFiZ71EJNnjtGnUrDvJL9MI8UXBuuO7:8IK+obG0+7RGnIB9MSLO7

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 7 IoCs

pid	Process
448	5516decfc8b4ca782e66470f274e7850N.exe
448	5516decfc8b4ca782e66470f274e7850N.exe
448	5516decfc8b4ca782e66470f274e7850N.exe
448	5516decfc8b4ca782e66470f274e7850N.exe
448	5516decfc8b4ca782e66470f274e7850N.exe
448	5516decfc8b4ca782e66470f274e7850N.exe
448	5516decfc8b4ca782e66470f274e7850N.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
448	5516decfc8b4ca782e66470f274e7850N.exe
2824	5516decfc8b4ca782e66470f274e7850N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 448 set thread context of 2824	448	5516decfc8b4ca782e66470f274e7850N.exe	87

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\fiskestimernes\Kjv.ini	5516decfc8b4ca782e66470f274e7850N.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	5516decfc8b4ca782e66470f274e7850N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5516decfc8b4ca782e66470f274e7850N.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
448	5516decfc8b4ca782e66470f274e7850N.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 448 wrote to memory of 2824	448	5516decfc8b4ca782e66470f274e7850N.exe	87
PID 448 wrote to memory of 2824	448	5516decfc8b4ca782e66470f274e7850N.exe	87
PID 448 wrote to memory of 2824	448	5516decfc8b4ca782e66470f274e7850N.exe	87
PID 448 wrote to memory of 2824	448	5516decfc8b4ca782e66470f274e7850N.exe	87
PID 448 wrote to memory of 2824	448	5516decfc8b4ca782e66470f274e7850N.exe	87

C:\Users\Admin\AppData\Local\Temp\5516decfc8b4ca782e66470f274e7850N.exe
"C:\Users\Admin\AppData\Local\Temp\5516decfc8b4ca782e66470f274e7850N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:448
- C:\Users\Admin\AppData\Local\Temp\5516decfc8b4ca782e66470f274e7850N.exe
  "C:\Users\Admin\AppData\Local\Temp\5516decfc8b4ca782e66470f274e7850N.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2824

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:\Users\Admin\AppData\Local\Temp\nsh978E.tmp\LangDLL.dll

Filesize
5KB

MD5
adad756e278127e9d31eb33d6e053740

SHA1
71943b9697441152b131a21075f5463ab40ca6ed

SHA256
d1fa47d8485b212eccd266fe5fc2be9750c4b843da78bddd2349ab58ef138b32

SHA512
047fa57a44ed2c2f214be68af1b2740591e4b508a4ca9c2eed7f84b3bb5b6f0a7c1d584e6790cc231dfbb6a23a96f826079ed5b0d9d961e95397ffc345cb7a5c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsh978E.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/448-47-0x0000000004A10000-0x0000000005CC1000-memory.dmp

Filesize
18.7MB

Download
memory/448-32-0x0000000004A10000-0x0000000005CC1000-memory.dmp

Filesize
18.7MB

Download
memory/448-34-0x0000000077381000-0x00000000774A1000-memory.dmp

Filesize
1.1MB

Download
memory/448-33-0x0000000004A10000-0x0000000005CC1000-memory.dmp

Filesize
18.7MB

Download
memory/448-35-0x0000000073FD4000-0x0000000073FD5000-memory.dmp

Filesize
4KB

Download
memory/2824-36-0x00000000016D0000-0x0000000002981000-memory.dmp

Filesize
18.7MB

Download
memory/2824-38-0x0000000077425000-0x0000000077426000-memory.dmp

Filesize
4KB

Download
memory/2824-39-0x00000000016D0000-0x0000000002981000-memory.dmp

Filesize
18.7MB

Download
memory/2824-40-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2824-41-0x0000000077381000-0x00000000774A1000-memory.dmp

Filesize
1.1MB

Download
memory/2824-37-0x0000000077408000-0x0000000077409000-memory.dmp

Filesize
4KB

Download