guloader | b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-12-2024 03:09

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General

Target

b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe
Size

695KB
MD5

7717d53b780cc8a4cbf0934410d995df
SHA1

ca89543dff270cb6f589c49aaf02b8d6566ae2b8
SHA256

b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd
SHA512

fcbdfabd4c5e0ffea81611c0bc7ab029a870b97416f0768cc2d43f24642ed046f7e9b49cf374b1c7371ebe168111feed3712c23c4f413aa0c382e8cc9fb7ba38
SSDEEP

12288:8QszxdK1xIHkD5/wHAlzsyic2NbZWKyWE8N7ccIyJxtDcMdlDjspRaFhCyiNuW:uwcOzsyn25gWfNwcIyJcMd9utsW

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
2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe

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

Web Service

T1102

flow	ioc
16	drive.google.com
17	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe
4060	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2108 set thread context of 4060	2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe	84

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\brakehand.Inf120	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.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	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 4060	2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe	84
PID 2108 wrote to memory of 4060	2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe	84
PID 2108 wrote to memory of 4060	2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe	84
PID 2108 wrote to memory of 4060	2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe	84
PID 2108 wrote to memory of 4060	2108	b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe	84

C:\Users\Admin\AppData\Local\Temp\b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe
"C:\Users\Admin\AppData\Local\Temp\b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.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:2108
- C:\Users\Admin\AppData\Local\Temp\b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe
  "C:\Users\Admin\AppData\Local\Temp\b7303a968a3a0198dce343fcea8e5e11a9ed7dbf8b7515ec12e15c88ed6b42fd.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4060

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\nsx8D0E.tmp\System.dll

Filesize
11KB

MD5
4d3b19a81bd51f8ce44b93643a4e3a99

SHA1
35f8b00e85577b014080df98bd2c378351d9b3e9

SHA256
fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce

SHA512
b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

Download Submit
memory/2108-12-0x0000000002F30000-0x0000000003A32000-memory.dmp

Filesize
11.0MB

Download
memory/2108-13-0x00000000775C1000-0x00000000776E1000-memory.dmp

Filesize
1.1MB

Download
memory/2108-14-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2108-15-0x0000000002F30000-0x0000000003A32000-memory.dmp

Filesize
11.0MB

Download
memory/4060-16-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4060-17-0x0000000001660000-0x0000000002162000-memory.dmp

Filesize
11.0MB

Download
memory/4060-18-0x0000000077648000-0x0000000077649000-memory.dmp

Filesize
4KB

Download
memory/4060-19-0x0000000077665000-0x0000000077666000-memory.dmp

Filesize
4KB

Download
memory/4060-32-0x0000000001660000-0x0000000002162000-memory.dmp

Filesize
11.0MB

Download
memory/4060-34-0x00000000775C1000-0x00000000776E1000-memory.dmp

Filesize
1.1MB

Download
memory/4060-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download