guloader | cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac

General

Target

MDU9342434.exe
Size

1.1MB
MD5

2ac9cd56e3877efa00a0353cde71186f
SHA1

d0460a2b1fe30c342216048c4390af045b120146
SHA256

cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac
SHA512

e78d405d9b92319d396d488e4c104021a224789fabf09a278d252e1aa407cae1ce4d3562f1e6a18bc3151e16049a1a6d3687b6a4578fc4c946349d5292eb9e2d
SSDEEP

24576:oS5HuMJiUsl/f4g0lnQFpy54j3BjqgMQUWhypBj:B5o/falnQ+54j3ZftUNBj

Score

10^/10

guloader downloader persistence

Malware Config

Signatures

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

Processes:

MDU9342434.exe

pid process

1608 MDU9342434.exe

pid	process
1608	MDU9342434.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Gaucheries = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Kerykeion126\\Tranlampe231.exe"	wab.exe

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

Web Service
T1102

Processes:

flow ioc

44 drive.google.com
45 drive.google.com

flow	ioc
44	drive.google.com
45	drive.google.com

Drops file in System32 directory 2 IoCs

Processes:

MDU9342434.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\threshes.uds	MDU9342434.exe
File opened for modification	C:\Windows\SysWOW64\lohoch.gim	MDU9342434.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

3956 wab.exe
3956 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

MDU9342434.exewab.exe

pid process

1608 MDU9342434.exe
3956 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

MDU9342434.exe

description pid process target process

PID 1608 set thread context of 3956 1608 MDU9342434.exe wab.exe
Drops file in Program Files directory 1 IoCs

Processes:

MDU9342434.exe

description ioc process

File opened for modification C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio MDU9342434.exe

pid	process
3956	wab.exe
3956	wab.exe

pid	process
1608	MDU9342434.exe
3956	wab.exe

description	pid	process	target process
PID 1608 set thread context of 3956	1608	MDU9342434.exe	wab.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio	MDU9342434.exe

Drops file in Windows directory 3 IoCs

Processes:

MDU9342434.exe

description	ioc	process
File opened for modification	C:\Windows\Fonts\Forters67\Elektrotekniker.wra	MDU9342434.exe
File opened for modification	C:\Windows\Tnkepauses.tro	MDU9342434.exe
File opened for modification	C:\Windows\resources\0409\enchasing.Pet	MDU9342434.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

MDU9342434.exe

pid process

1608 MDU9342434.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

3956 wab.exe

pid	process
1608	MDU9342434.exe

pid	process
3956	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

MDU9342434.exe

description	pid	process	target process
PID 1608 wrote to memory of 3956	1608	MDU9342434.exe	wab.exe
PID 1608 wrote to memory of 3956	1608	MDU9342434.exe	wab.exe
PID 1608 wrote to memory of 3956	1608	MDU9342434.exe	wab.exe
PID 1608 wrote to memory of 3956	1608	MDU9342434.exe	wab.exe
PID 1608 wrote to memory of 3956	1608	MDU9342434.exe	wab.exe

C:\Users\Admin\AppData\Local\Temp\MDU9342434.exe
"C:\Users\Admin\AppData\Local\Temp\MDU9342434.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- 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:1608

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\MDU9342434.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:3956

Network

MITRE ATT&CK Matrix ATT&CK v13

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 Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsw7DEB.tmp\System.dll
Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/1608-19-0x00000000054C0000-0x0000000007D0D000-memory.dmp

Filesize
40.3MB

Download
memory/1608-20-0x0000000077061000-0x0000000077181000-memory.dmp

Filesize
1.1MB

Download
memory/1608-21-0x00000000054C0000-0x0000000007D0D000-memory.dmp

Filesize
40.3MB

Download
memory/1608-22-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/3956-23-0x0000000002460000-0x0000000004CAD000-memory.dmp

Filesize
40.3MB

Download
memory/3956-24-0x00000000770E8000-0x00000000770E9000-memory.dmp

Filesize
4KB

Download
memory/3956-25-0x0000000077061000-0x0000000077181000-memory.dmp

Filesize
1.1MB

Download
memory/3956-39-0x0000000002460000-0x0000000004CAD000-memory.dmp

Filesize
40.3MB

Download
memory/3956-40-0x0000000077061000-0x0000000077181000-memory.dmp

Filesize
1.1MB

Download
memory/3956-43-0x0000000001200000-0x0000000002454000-memory.dmp

Filesize
18.3MB

Download
memory/3956-42-0x0000000002460000-0x0000000004CAD000-memory.dmp

Filesize
40.3MB

Download
memory/3956-44-0x0000000001200000-0x0000000002454000-memory.dmp

Filesize
18.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads