guloader | 1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283

General

Target

1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe
Size

555KB
MD5

e0cdd543f142a8cb51c02d2229f9602d
SHA1

fe357f74ea47ba6319fe68240131f19c9ae2664d
SHA256

1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283
SHA512

f435c47834a9d430ed23d24836c391ddaac2904bddc76e53551aca7df607940e911efa2c752c18e19d82c454582fb75da5e67ffc8660252e35db775ff1b9588a
SSDEEP

6144:HIw3/aVqeUyFpR211QqcrrGmMvL41GTpiEBsfnZlcaAX4TUjiSiilU9t75k2hWjE:HaPF609uJ41kpiEoRAoARlU6tPzcP

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
5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe

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

Web Service

T1102

flow	ioc
21	drive.google.com
22	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4988	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe
4988	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5056 set thread context of 4988	5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe	88

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
4224	4988	WerFault.exe	88

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	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4988	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe
4988	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 4988	5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe	88
PID 5056 wrote to memory of 4988	5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe	88
PID 5056 wrote to memory of 4988	5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe	88
PID 5056 wrote to memory of 4988	5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe	88
PID 5056 wrote to memory of 4988	5056	1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe	88

C:\Users\Admin\AppData\Local\Temp\1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe
"C:\Users\Admin\AppData\Local\Temp\1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.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:5056
- C:\Users\Admin\AppData\Local\Temp\1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe
  "C:\Users\Admin\AppData\Local\Temp\1602325d55a3537877b0a08c80dfd34f69a12b08d10af3b5aec5479fac779283.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4988
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 1552
    3⤵
    - Program crash
    PID:4224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4988 -ip 4988
1⤵
PID:4556

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\Local\Temp\nshBE41.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

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

Filesize
37B

MD5
cfda8e6aade7958f94a959bdb29cb209

SHA1
59c459e105a7af33d13a365f735e3cb7b8e5ddb0

SHA256
b4543e8ab4997934d2edc7de8a76a24b7c2ccb641212ae3b9b17fe05b71d3e87

SHA512
edfdca00667ed3a5558f7e614373f0b8393763a979154666972c659cb44e75ccd51170e4e2189043046eb4ddb8a68642bbdb6f98a0e494e76e86faaf14f993b2

Download Submit
memory/4988-297-0x0000000077B71000-0x0000000077C91000-memory.dmp

Filesize
1.1MB

Download
memory/4988-306-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4988-301-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-310-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4988-282-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-283-0x0000000001660000-0x00000000029B4000-memory.dmp

Filesize
19.3MB

Download
memory/4988-284-0x0000000077BF8000-0x0000000077BF9000-memory.dmp

Filesize
4KB

Download
memory/4988-285-0x0000000077C15000-0x0000000077C16000-memory.dmp

Filesize
4KB

Download
memory/4988-309-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-296-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-311-0x0000000001660000-0x00000000029B4000-memory.dmp

Filesize
19.3MB

Download
memory/4988-308-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-289-0x0000000001660000-0x00000000029B4000-memory.dmp

Filesize
19.3MB

Download
memory/4988-302-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4988-304-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-305-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4988-307-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/5056-279-0x0000000077B71000-0x0000000077C91000-memory.dmp

Filesize
1.1MB

Download
memory/5056-280-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/5056-303-0x00000000031A0000-0x00000000044F4000-memory.dmp

Filesize
19.3MB

Download
memory/5056-281-0x00000000031A0000-0x00000000044F4000-memory.dmp

Filesize
19.3MB

Download
memory/5056-278-0x00000000031A0000-0x00000000044F4000-memory.dmp

Filesize
19.3MB

Download

Analysis

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