guloader | 5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173

General

Target

5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.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
2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.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 NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe
584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1632	584	WerFault.exe	30

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	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30
PID 2520 wrote to memory of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30
PID 2520 wrote to memory of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30
PID 2520 wrote to memory of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30
PID 2520 wrote to memory of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30
PID 2520 wrote to memory of 584	2520	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	30
PID 584 wrote to memory of 1632	584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	33
PID 584 wrote to memory of 1632	584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	33
PID 584 wrote to memory of 1632	584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	33
PID 584 wrote to memory of 1632	584	5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe	33

C:\Users\Admin\AppData\Local\Temp\5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe
"C:\Users\Admin\AppData\Local\Temp\5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.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:2520
- C:\Users\Admin\AppData\Local\Temp\5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe
  "C:\Users\Admin\AppData\Local\Temp\5e279ef4c54dfc525f423b98054f37ee6eb51a71e8c1f76d5438393055442173.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:584
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 584 -s 68
    3⤵
    - Program crash
    PID:1632

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\nso9AAC.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
memory/584-306-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/584-283-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/584-284-0x00000000775F0000-0x0000000077799000-memory.dmp

Filesize
1.7MB

Download
memory/584-304-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/584-309-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/584-308-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/584-310-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2520-281-0x00000000775F0000-0x0000000077799000-memory.dmp

Filesize
1.7MB

Download
memory/2520-280-0x00000000775F1000-0x00000000776F2000-memory.dmp

Filesize
1.0MB

Download
memory/2520-282-0x00000000036E0000-0x00000000051BD000-memory.dmp

Filesize
26.9MB

Download
memory/2520-279-0x00000000036E0000-0x00000000051BD000-memory.dmp

Filesize
26.9MB

Download
memory/2520-307-0x00000000036E0000-0x00000000051BD000-memory.dmp

Filesize
26.9MB

Download

Analysis

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