guloader | 066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654

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
3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

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

Web Service

T1102

flow	ioc
4	drive.google.com
5	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe
2672	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3044 set thread context of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31

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
3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31
PID 3044 wrote to memory of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31
PID 3044 wrote to memory of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31
PID 3044 wrote to memory of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31
PID 3044 wrote to memory of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31
PID 3044 wrote to memory of 2672	3044	066b848407c352a6aa9296bdfae6b27cc878fa27e02ec054f758df83f5c44654.exe	31

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:3044
- 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:2672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsyDDF1.tmp\System.dll

Filesize
11KB

MD5
4d3b19a81bd51f8ce44b93643a4e3a99

SHA1
35f8b00e85577b014080df98bd2c378351d9b3e9

SHA256
fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce

SHA512
b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

Download Submit
memory/2672-18-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2672-19-0x0000000076EC0000-0x0000000077069000-memory.dmp

Filesize
1.7MB

Download
memory/2672-40-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/3044-13-0x0000000003480000-0x0000000005B43000-memory.dmp

Filesize
38.8MB

Download
memory/3044-14-0x0000000076EC1000-0x0000000076FC2000-memory.dmp

Filesize
1.0MB

Download
memory/3044-15-0x0000000076EC0000-0x0000000077069000-memory.dmp

Filesize
1.7MB

Download
memory/3044-16-0x0000000003480000-0x0000000005B43000-memory.dmp

Filesize
38.8MB

Download
memory/3044-17-0x0000000003480000-0x0000000005B43000-memory.dmp

Filesize
38.8MB

Download

Analysis

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