guloader | 5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173

General

Target

presupuesto urgente.exe
Size

568KB
MD5

8ae672783481c0b46780431bfce5a216
SHA1

ace989f4c2a82f48cc3167e531ab13d2999537b2
SHA256

5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173
SHA512

be1f8b04c0ff14dfb85089a1311f6fcffaa26db076d6889f756a077503430d7d7ff2cdfc944ed7ef1a47a7f88ad374834c8b945fb96ab1a82f09573c98a54d83
SSDEEP

6144:wIw3/aiZzcfWAnp3NRmqRAV596VJk4PGJ5zkk2vZBKmXSSwrw:Ma/1MVzim5zF2hwymw

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
528	presupuesto urgente.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2384	presupuesto urgente.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
528	presupuesto urgente.exe
2384	presupuesto urgente.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 528 set thread context of 2384	528	presupuesto urgente.exe	30

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	presupuesto urgente.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	presupuesto urgente.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2384	presupuesto urgente.exe
2384	presupuesto urgente.exe
2384	presupuesto urgente.exe
2384	presupuesto urgente.exe
2384	presupuesto urgente.exe
2384	presupuesto urgente.exe
2384	presupuesto urgente.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
528	presupuesto urgente.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 528 wrote to memory of 2384	528	presupuesto urgente.exe	30
PID 528 wrote to memory of 2384	528	presupuesto urgente.exe	30
PID 528 wrote to memory of 2384	528	presupuesto urgente.exe	30
PID 528 wrote to memory of 2384	528	presupuesto urgente.exe	30
PID 528 wrote to memory of 2384	528	presupuesto urgente.exe	30
PID 528 wrote to memory of 2384	528	presupuesto urgente.exe	30

C:\Users\Admin\AppData\Local\Temp\presupuesto urgente.exe
"C:\Users\Admin\AppData\Local\Temp\presupuesto urgente.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:528
- C:\Users\Admin\AppData\Local\Temp\presupuesto urgente.exe
  "C:\Users\Admin\AppData\Local\Temp\presupuesto urgente.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2384

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

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Gaulin.ini

Filesize
37B

MD5
cfda8e6aade7958f94a959bdb29cb209

SHA1
59c459e105a7af33d13a365f735e3cb7b8e5ddb0

SHA256
b4543e8ab4997934d2edc7de8a76a24b7c2ccb641212ae3b9b17fe05b71d3e87

SHA512
edfdca00667ed3a5558f7e614373f0b8393763a979154666972c659cb44e75ccd51170e4e2189043046eb4ddb8a68642bbdb6f98a0e494e76e86faaf14f993b2

Download Submit
\Users\Admin\AppData\Local\Temp\nsz82C9.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
memory/528-307-0x00000000035E0000-0x00000000050BD000-memory.dmp

Filesize
26.9MB

Download
memory/528-280-0x00000000035E0000-0x00000000050BD000-memory.dmp

Filesize
26.9MB

Download
memory/528-282-0x0000000076ED0000-0x0000000077079000-memory.dmp

Filesize
1.7MB

Download
memory/528-281-0x0000000076ED1000-0x0000000076FD2000-memory.dmp

Filesize
1.0MB

Download
memory/528-279-0x00000000035E0000-0x00000000050BD000-memory.dmp

Filesize
26.9MB

Download
memory/2384-283-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2384-284-0x0000000076ED0000-0x0000000077079000-memory.dmp

Filesize
1.7MB

Download
memory/2384-306-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2384-309-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2384-310-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2384-311-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2384-312-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2384-318-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download

Analysis

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