guloader | 42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-10-2024 11:02

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General

Target

42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe
Size

830KB
MD5

73ae027d67e7b96a582d2d9acc10a165
SHA1

a0df4ad9abd80443ab349bcc8fa47358d6c694d1
SHA256

42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040
SHA512

cb459be7181796dfa977fbb88f7f7c393a2eaa624cac2a9011291318fa83da621ac7b8d5551b2ef4e3078528103c0b9acead14ed83d0402456f3947457db4f18
SSDEEP

12288:ZoIjDxKlH803Ft7CwOfjBfFk8wtZXQvSJWlltAjF45yVWZXeaWxhZNv:TKW01t7/OrBS8nvSieFqRZXeP/v

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
1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe
1312	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1836 set thread context of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31

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	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1836 wrote to memory of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31
PID 1836 wrote to memory of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31
PID 1836 wrote to memory of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31
PID 1836 wrote to memory of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31
PID 1836 wrote to memory of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31
PID 1836 wrote to memory of 1312	1836	42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe	31

C:\Users\Admin\AppData\Local\Temp\42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe
"C:\Users\Admin\AppData\Local\Temp\42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Users\Admin\AppData\Local\Temp\42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe
  "C:\Users\Admin\AppData\Local\Temp\42fe849e541f87e2274d209e1432dfa433f288b0b6ec9c6a287fd5f5e791b040.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1312

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\nsoC3CD.tmp\System.dll

Filesize
12KB

MD5
dd87a973e01c5d9f8e0fcc81a0af7c7a

SHA1
c9206ced48d1e5bc648b1d0f54cccc18bf643a14

SHA256
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1

SHA512
4910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f

Download Submit
memory/1312-21-0x00000000014E0000-0x0000000003885000-memory.dmp

Filesize
35.6MB

Download
memory/1312-22-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/1312-23-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/1836-17-0x0000000002E90000-0x0000000005235000-memory.dmp

Filesize
35.6MB

Download
memory/1836-19-0x0000000076EE0000-0x0000000077089000-memory.dmp

Filesize
1.7MB

Download
memory/1836-18-0x0000000076EE1000-0x0000000076FE2000-memory.dmp

Filesize
1.0MB

Download
memory/1836-20-0x0000000002E90000-0x0000000005235000-memory.dmp

Filesize
35.6MB

Download
memory/1836-29-0x0000000002E90000-0x0000000005235000-memory.dmp

Filesize
35.6MB

Download