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

1488 PJIFONY.exe
Loads dropped DLL 5 IoCs

Processes:

EXCEL.EXE

pid process

1056 EXCEL.EXE
1056 EXCEL.EXE
1056 EXCEL.EXE
1056 EXCEL.EXE
1056 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
1488	PJIFONY.exe

pid	process
1056	EXCEL.EXE
1056	EXCEL.EXE
1056	EXCEL.EXE
1056	EXCEL.EXE
1056	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\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	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
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
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
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1056 EXCEL.EXE
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

EXCEL.EXE

pid process

1056 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

EXCEL.EXE

description pid process

Token: SeShutdownPrivilege 1056 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1056 EXCEL.EXE
1056 EXCEL.EXE
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

EXCEL.EXEPJIFONY.exe

pid process

1056 EXCEL.EXE
1056 EXCEL.EXE
1056 EXCEL.EXE
1488 PJIFONY.exe
1056 EXCEL.EXE
1056 EXCEL.EXE

pid	process
1056	EXCEL.EXE

pid	process
1056	EXCEL.EXE

description	pid	process
Token: SeShutdownPrivilege	1056	EXCEL.EXE

pid	process
1056	EXCEL.EXE
1056	EXCEL.EXE

pid	process
1056	EXCEL.EXE
1056	EXCEL.EXE
1056	EXCEL.EXE
1488	PJIFONY.exe
1056	EXCEL.EXE
1056	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1056 wrote to memory of 1488	1056	EXCEL.EXE	PJIFONY.exe
PID 1056 wrote to memory of 1488	1056	EXCEL.EXE	PJIFONY.exe
PID 1056 wrote to memory of 1488	1056	EXCEL.EXE	PJIFONY.exe
PID 1056 wrote to memory of 1488	1056	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 behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1056

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:1488

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
8ff85d12eff7c5ab365a1feccd45513b

SHA1
2c0cf4adfe283e55a8c409367f396a84101defa3

SHA256
1fbf984271ffa5cf79c2e5e9be8d40198d2c6619ce96899844a9d4ab2ef5bffa

SHA512
95d7a49e2ce948160fd1f43e8448ab2c5255cf06aff0b63f54847354286dba1fc767fa673912838448dc348d590f1c1d25441a84b00733db22bda8c45fb68eb6

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
8ff85d12eff7c5ab365a1feccd45513b

SHA1
2c0cf4adfe283e55a8c409367f396a84101defa3

SHA256
1fbf984271ffa5cf79c2e5e9be8d40198d2c6619ce96899844a9d4ab2ef5bffa

SHA512
95d7a49e2ce948160fd1f43e8448ab2c5255cf06aff0b63f54847354286dba1fc767fa673912838448dc348d590f1c1d25441a84b00733db22bda8c45fb68eb6

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
8ff85d12eff7c5ab365a1feccd45513b

SHA1
2c0cf4adfe283e55a8c409367f396a84101defa3

SHA256
1fbf984271ffa5cf79c2e5e9be8d40198d2c6619ce96899844a9d4ab2ef5bffa

SHA512
95d7a49e2ce948160fd1f43e8448ab2c5255cf06aff0b63f54847354286dba1fc767fa673912838448dc348d590f1c1d25441a84b00733db22bda8c45fb68eb6

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
8ff85d12eff7c5ab365a1feccd45513b

SHA1
2c0cf4adfe283e55a8c409367f396a84101defa3

SHA256
1fbf984271ffa5cf79c2e5e9be8d40198d2c6619ce96899844a9d4ab2ef5bffa

SHA512
95d7a49e2ce948160fd1f43e8448ab2c5255cf06aff0b63f54847354286dba1fc767fa673912838448dc348d590f1c1d25441a84b00733db22bda8c45fb68eb6

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
8ff85d12eff7c5ab365a1feccd45513b

SHA1
2c0cf4adfe283e55a8c409367f396a84101defa3

SHA256
1fbf984271ffa5cf79c2e5e9be8d40198d2c6619ce96899844a9d4ab2ef5bffa

SHA512
95d7a49e2ce948160fd1f43e8448ab2c5255cf06aff0b63f54847354286dba1fc767fa673912838448dc348d590f1c1d25441a84b00733db22bda8c45fb68eb6

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\PJIFONY.exe
MD5
8ff85d12eff7c5ab365a1feccd45513b

SHA1
2c0cf4adfe283e55a8c409367f396a84101defa3

SHA256
1fbf984271ffa5cf79c2e5e9be8d40198d2c6619ce96899844a9d4ab2ef5bffa

SHA512
95d7a49e2ce948160fd1f43e8448ab2c5255cf06aff0b63f54847354286dba1fc767fa673912838448dc348d590f1c1d25441a84b00733db22bda8c45fb68eb6

Download Submit
memory/1056-59-0x000000002FE31000-0x000000002FE34000-memory.dmp

Filesize
12KB

Download
memory/1056-60-0x0000000071701000-0x0000000071703000-memory.dmp

Filesize
8KB

Download
memory/1056-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1488-67-0x0000000000000000-mapping.dmp

Download
memory/1488-71-0x0000000000290000-0x00000000002BA000-memory.dmp

Filesize
168KB

Download

Analysis

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