guloader | 066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 14:47

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General

Target

066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe
Size

694KB
MD5

f72133731914d36ef205031a0dfbeb11
SHA1

7f74e71b1ca89bbd02272d591629c6e6301115db
SHA256

066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654
SHA512

4f70b2432a1c258fc8a1008f306045587557c33a6fe8522a41288d8987fa7318ce379809cccd985a73e6603b50a16c020067059731294e52ea5ce6db9a537be6
SSDEEP

12288:xQszxdK1xIHkD5/wHBxs5WAjpUnKyWE8NZ30cTdlDjspRaFhCyiNuC:rwcw5DwfWfNp0cTd9utsC

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
1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

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

Web Service

T1102

flow	ioc
23	drive.google.com
22	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe
4268	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1796 set thread context of 4268	1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	92

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\brakehand.Inf120	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.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	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 4268	1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	92
PID 1796 wrote to memory of 4268	1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	92
PID 1796 wrote to memory of 4268	1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	92
PID 1796 wrote to memory of 4268	1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	92
PID 1796 wrote to memory of 4268	1796	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	92

C:\Users\Admin\AppData\Local\Temp\066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe
"C:\Users\Admin\AppData\Local\Temp\066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.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:1796
- C:\Users\Admin\AppData\Local\Temp\066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe
  "C:\Users\Admin\AppData\Local\Temp\066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4268

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsk9F7D.tmp\System.dll

Filesize
11KB

MD5
4d3b19a81bd51f8ce44b93643a4e3a99

SHA1
35f8b00e85577b014080df98bd2c378351d9b3e9

SHA256
fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce

SHA512
b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

Download Submit
memory/1796-12-0x0000000003070000-0x0000000005733000-memory.dmp

Filesize
38.8MB

Download
memory/1796-13-0x0000000077121000-0x0000000077241000-memory.dmp

Filesize
1.1MB

Download
memory/1796-14-0x0000000003070000-0x0000000005733000-memory.dmp

Filesize
38.8MB

Download
memory/4268-15-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4268-16-0x0000000001660000-0x0000000003D23000-memory.dmp

Filesize
38.8MB

Download
memory/4268-29-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4268-30-0x0000000001660000-0x0000000003D23000-memory.dmp

Filesize
38.8MB

Download