guloader | eed3c571b2769d58f5a7543cba5c805acae2403bc5fdaedb171701a430a36fed

General

Target

fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe
Size

60KB
MD5

fb13adf0c54943795f49d6faaab03896
SHA1

f4ddf0dfd479337a4e9bfaf192c1842cc07f437a
SHA256

eed3c571b2769d58f5a7543cba5c805acae2403bc5fdaedb171701a430a36fed
SHA512

107b9c67df19dc883802f93f885469d6c3166921bacd37588e96291527315e1af5aaa2e60985f4b61b49eeddafefae325688237e03d9ddde4ebf1d746833d3de
SSDEEP

768:cYBnWfcQvkQ3GsspHrSw2N7JnCXpkGfaN5qSgmpPWLNl2BD98qI9bV:c30Qvr3GsG+wYZCXGGfaSxLyoqgV

Score

10^/10

guloader discovery downloader guloader persistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1qkBF7CJtNtikeSamnaw_QoVf18a1vB30

xor.base64

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Guloader payload 1 IoCs

guloader

resource	yara_rule
behavioral1/memory/2632-2-0x0000000000340000-0x0000000000348000-memory.dmp	family_guloader

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\tyrom = "C:\\Users\\Admin\\Semis2\\Tyredes6.bat"	RegAsm.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
4	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe
2764	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2632 set thread context of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31

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	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe
2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2740	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	30
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31
PID 2632 wrote to memory of 2764	2632	fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2632
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe"
  2⤵
  PID:2740
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\fb13adf0c54943795f49d6faaab03896_JaffaCakes118.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

memory/2632-2-0x0000000000340000-0x0000000000348000-memory.dmp

Filesize
32KB

Download
memory/2632-3-0x00000000775F1000-0x00000000776F2000-memory.dmp

Filesize
1.0MB

Download
memory/2632-4-0x00000000775F0000-0x0000000077799000-memory.dmp

Filesize
1.7MB

Download
memory/2632-25-0x0000000000340000-0x0000000000348000-memory.dmp

Filesize
32KB

Download
memory/2632-26-0x0000000000340000-0x0000000000348000-memory.dmp

Filesize
32KB

Download
memory/2764-6-0x00000000775F0000-0x0000000077799000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads