guloader | 2254889b715d357090efc3da8dfa5ed6407611605825038f9e1a9a3d949ae013

General

Target

Orden.xls
Size

180KB
MD5

6d40106f6254a4709fbc5ee82359a1b2
SHA1

e1df7baf5d39a82ebb0fb0956d554ff4ea96a44a
SHA256

2254889b715d357090efc3da8dfa5ed6407611605825038f9e1a9a3d949ae013
SHA512

3b17c41a6f0769e43db9e2681975aa48421bf70b7c0a19177952a9c1de360b68d330df0e7222404d1af3f6defdd35f65ff7da5f94177f25bba9194c313059d14

Score

10^/10

guloader downloader suricata

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

PJIFONY.exe

pid process

1096 PJIFONY.exe
Loads dropped DLL 5 IoCs

Processes:

EXCEL.EXE

pid process

1648 EXCEL.EXE
1648 EXCEL.EXE
1648 EXCEL.EXE
1648 EXCEL.EXE
1648 EXCEL.EXE
Office loads VBA resources, possible macro or embedded object present
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

pid	process
1096	PJIFONY.exe

pid	process
1648	EXCEL.EXE
1648	EXCEL.EXE
1648	EXCEL.EXE
1648	EXCEL.EXE
1648	EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1648 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1648 EXCEL.EXE
1648 EXCEL.EXE
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

EXCEL.EXEPJIFONY.exe

pid process

1648 EXCEL.EXE
1648 EXCEL.EXE
1648 EXCEL.EXE
1096 PJIFONY.exe

pid	process
1648	EXCEL.EXE

pid	process
1648	EXCEL.EXE
1648	EXCEL.EXE

pid	process
1648	EXCEL.EXE
1648	EXCEL.EXE
1648	EXCEL.EXE
1096	PJIFONY.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1648 wrote to memory of 1096	1648	EXCEL.EXE	PJIFONY.exe
PID 1648 wrote to memory of 1096	1648	EXCEL.EXE	PJIFONY.exe
PID 1648 wrote to memory of 1096	1648	EXCEL.EXE	PJIFONY.exe
PID 1648 wrote to memory of 1096	1648	EXCEL.EXE	PJIFONY.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Orden.xls
1⤵
- Loads dropped DLL
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1648

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1096

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
30cd538734fa25507f9d54f58c708e9b

SHA1
0257d5982325239425ced2c6a326c101ba8f366f

SHA256
5fcc58948623192102c69e2d46c7bfa2256eb76e23a9e5b2543990ffa032d0cf

SHA512
dcf80274934192902af520e76eecc40d646a7aad7f543be2e11026ac79e2c4a7d31ccc0402ae391c234e2f7c04156bc053a3dfe74846d492cfb18e168caf46fe

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
30cd538734fa25507f9d54f58c708e9b

SHA1
0257d5982325239425ced2c6a326c101ba8f366f

SHA256
5fcc58948623192102c69e2d46c7bfa2256eb76e23a9e5b2543990ffa032d0cf

SHA512
dcf80274934192902af520e76eecc40d646a7aad7f543be2e11026ac79e2c4a7d31ccc0402ae391c234e2f7c04156bc053a3dfe74846d492cfb18e168caf46fe

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
30cd538734fa25507f9d54f58c708e9b

SHA1
0257d5982325239425ced2c6a326c101ba8f366f

SHA256
5fcc58948623192102c69e2d46c7bfa2256eb76e23a9e5b2543990ffa032d0cf

SHA512
dcf80274934192902af520e76eecc40d646a7aad7f543be2e11026ac79e2c4a7d31ccc0402ae391c234e2f7c04156bc053a3dfe74846d492cfb18e168caf46fe

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
30cd538734fa25507f9d54f58c708e9b

SHA1
0257d5982325239425ced2c6a326c101ba8f366f

SHA256
5fcc58948623192102c69e2d46c7bfa2256eb76e23a9e5b2543990ffa032d0cf

SHA512
dcf80274934192902af520e76eecc40d646a7aad7f543be2e11026ac79e2c4a7d31ccc0402ae391c234e2f7c04156bc053a3dfe74846d492cfb18e168caf46fe

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
30cd538734fa25507f9d54f58c708e9b

SHA1
0257d5982325239425ced2c6a326c101ba8f366f

SHA256
5fcc58948623192102c69e2d46c7bfa2256eb76e23a9e5b2543990ffa032d0cf

SHA512
dcf80274934192902af520e76eecc40d646a7aad7f543be2e11026ac79e2c4a7d31ccc0402ae391c234e2f7c04156bc053a3dfe74846d492cfb18e168caf46fe

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
30cd538734fa25507f9d54f58c708e9b

SHA1
0257d5982325239425ced2c6a326c101ba8f366f

SHA256
5fcc58948623192102c69e2d46c7bfa2256eb76e23a9e5b2543990ffa032d0cf

SHA512
dcf80274934192902af520e76eecc40d646a7aad7f543be2e11026ac79e2c4a7d31ccc0402ae391c234e2f7c04156bc053a3dfe74846d492cfb18e168caf46fe

Download Submit
memory/1096-67-0x0000000000000000-mapping.dmp

Download
memory/1096-71-0x00000000005D0000-0x00000000005F9000-memory.dmp

Filesize
164KB

Download
memory/1648-59-0x000000002F281000-0x000000002F284000-memory.dmp

Filesize
12KB

Download
memory/1648-60-0x0000000071361000-0x0000000071363000-memory.dmp

Filesize
8KB

Download
memory/1648-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

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