guloader | d564eb94afb174fe3b854de086eda2a4e015d778a9aea9806e79f82044eac74e

General

Target

Assistentuddannelserne.exe
Size

652KB
MD5

5edee175c5003771dea841893ea46602
SHA1

14b96459dff641245aea6dacd34512830d945ee2
SHA256

d564eb94afb174fe3b854de086eda2a4e015d778a9aea9806e79f82044eac74e
SHA512

f16f409fa299352007cc5a78950590542c6d846263f5c25b0d80ac32f3b7f92fae2deafb360d1ee6adb73fbbfcc9f0341f730703febf1c0a7013ff4bef7cfb81
SSDEEP

12288:8bzbPZYc4aWV/8RxQM6ybpC2ZQt57tEwV3cyiqr7pDggHIMjbTJ+c:8bzbKc4NUP/dpC2ZQbJ53/XNr

Score

10^/10

guloader downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 1 IoCs

Processes:

Assistentuddannelserne.exe

pid process

3080 Assistentuddannelserne.exe
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

Assistentuddannelserne.exe

pid process

3404 Assistentuddannelserne.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Assistentuddannelserne.exeAssistentuddannelserne.exe

pid process

3080 Assistentuddannelserne.exe
3404 Assistentuddannelserne.exe

Suspicious use of SetThreadContext 5 IoCs

Processes:

Assistentuddannelserne.exeAssistentuddannelserne.exeSearchIndexer.exe

description	pid	process	target process
PID 3080 set thread context of 3404	3080	Assistentuddannelserne.exe	Assistentuddannelserne.exe
PID 3404 set thread context of 3592	3404	Assistentuddannelserne.exe	Explorer.EXE
PID 3404 set thread context of 216	3404	Assistentuddannelserne.exe	SearchIndexer.exe
PID 216 set thread context of 3592	216	SearchIndexer.exe	Explorer.EXE
PID 216 set thread context of 4548	216	SearchIndexer.exe	Firefox.exe

Drops file in Program Files directory 1 IoCs

Processes:

Assistentuddannelserne.exe

description ioc process

File opened for modification C:\Program Files (x86)\egnethedernes\hals.ini Assistentuddannelserne.exe
Drops file in Windows directory 1 IoCs

Processes:

Assistentuddannelserne.exe

description ioc process

File opened for modification C:\Windows\resources\0409\binbashi.ini Assistentuddannelserne.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Program Files (x86)\egnethedernes\hals.ini	Assistentuddannelserne.exe

description	ioc	process
File opened for modification	C:\Windows\resources\0409\binbashi.ini	Assistentuddannelserne.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

SearchIndexer.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1162180587-977231257-2194346871-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	SearchIndexer.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

Processes:

Assistentuddannelserne.exeSearchIndexer.exe

pid	process
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

Assistentuddannelserne.exeAssistentuddannelserne.exeExplorer.EXESearchIndexer.exe

pid	process
3080	Assistentuddannelserne.exe
3404	Assistentuddannelserne.exe
3592	Explorer.EXE
3592	Explorer.EXE
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe
216	SearchIndexer.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Assistentuddannelserne.exeExplorer.EXESearchIndexer.exe

description	pid	process	target process
PID 3080 wrote to memory of 3404	3080	Assistentuddannelserne.exe	Assistentuddannelserne.exe
PID 3080 wrote to memory of 3404	3080	Assistentuddannelserne.exe	Assistentuddannelserne.exe
PID 3080 wrote to memory of 3404	3080	Assistentuddannelserne.exe	Assistentuddannelserne.exe
PID 3080 wrote to memory of 3404	3080	Assistentuddannelserne.exe	Assistentuddannelserne.exe
PID 3080 wrote to memory of 3404	3080	Assistentuddannelserne.exe	Assistentuddannelserne.exe
PID 3592 wrote to memory of 216	3592	Explorer.EXE	SearchIndexer.exe
PID 3592 wrote to memory of 216	3592	Explorer.EXE	SearchIndexer.exe
PID 3592 wrote to memory of 216	3592	Explorer.EXE	SearchIndexer.exe
PID 216 wrote to memory of 4548	216	SearchIndexer.exe	Firefox.exe
PID 216 wrote to memory of 4548	216	SearchIndexer.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3592

C:\Users\Admin\AppData\Local\Temp\Assistentuddannelserne.exe
"C:\Users\Admin\AppData\Local\Temp\Assistentuddannelserne.exe"
2⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3080

C:\Users\Admin\AppData\Local\Temp\Assistentuddannelserne.exe
"C:\Users\Admin\AppData\Local\Temp\Assistentuddannelserne.exe"
3⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:3404

C:\Windows\SysWOW64\SearchIndexer.exe
"C:\Windows\SysWOW64\SearchIndexer.exe"
2⤵
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:216

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsu38F3.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/216-41-0x00000000009C0000-0x00000000009FF000-memory.dmp

Filesize
252KB

Download
memory/216-39-0x00000000009C0000-0x00000000009FF000-memory.dmp

Filesize
252KB

Download
memory/3080-32-0x0000000004220000-0x0000000006042000-memory.dmp

Filesize
30.1MB

Download
memory/3080-26-0x0000000004220000-0x0000000006042000-memory.dmp

Filesize
30.1MB

Download
memory/3080-27-0x00000000773C1000-0x00000000774E1000-memory.dmp

Filesize
1.1MB

Download
memory/3080-28-0x0000000074015000-0x0000000074016000-memory.dmp

Filesize
4KB

Download
memory/3404-29-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3404-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3404-34-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3404-35-0x0000000001660000-0x0000000003482000-memory.dmp

Filesize
30.1MB

Download
memory/3404-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3404-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3404-40-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3404-30-0x0000000001660000-0x0000000003482000-memory.dmp

Filesize
30.1MB

Download
memory/3592-42-0x00000000032E0000-0x00000000033DA000-memory.dmp

Filesize
1000KB

Download
memory/4548-49-0x000001B0260A0000-0x000001B0261B4000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads