guloader | 97699f2feb56f69cef214cf91e44a49892bef66602ca50da835882f66748b2f0

Analysis

max time kernel
146s
max time network
151s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
01-05-2024 14:28

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General

Target

Virksomhedsbeskatningers.exe
Size

438KB
MD5

986525b9eb3de6cca5978f707f72bd84
SHA1

3f26be3ca04eeb9cc811f40c2d3d52faa81d49fd
SHA256

97699f2feb56f69cef214cf91e44a49892bef66602ca50da835882f66748b2f0
SHA512

024fcf998f599a7661835033abd897331d02ddb45b03182c2977f9ac703b903c3fdcaddfaaf8f6ee74cbd20723771f9e185223fb98596e99de29f3ba9795cea1
SSDEEP

6144:7pkXGh6tHk47LcYBFqfXlo3RoYrTZkdTzZ8qQhb0/DjeV/ZE7Ce0T0+K7SJ9:2ZHkkLHBEf1grTOFZ8qQ50fce1+KOr

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

pid	Process
2240	Virksomhedsbeskatningers.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2240	Virksomhedsbeskatningers.exe
2600	Virksomhedsbeskatningers.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2240 set thread context of 2600	2240	Virksomhedsbeskatningers.exe	28

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Egetforbrug211\Sindsoprrenes.sto	Virksomhedsbeskatningers.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

pid	Process
2240	Virksomhedsbeskatningers.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2600	2240	Virksomhedsbeskatningers.exe	28
PID 2240 wrote to memory of 2600	2240	Virksomhedsbeskatningers.exe	28
PID 2240 wrote to memory of 2600	2240	Virksomhedsbeskatningers.exe	28
PID 2240 wrote to memory of 2600	2240	Virksomhedsbeskatningers.exe	28
PID 2240 wrote to memory of 2600	2240	Virksomhedsbeskatningers.exe	28
PID 2240 wrote to memory of 2600	2240	Virksomhedsbeskatningers.exe	28

C:\Users\Admin\AppData\Local\Temp\Virksomhedsbeskatningers.exe
"C:\Users\Admin\AppData\Local\Temp\Virksomhedsbeskatningers.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Users\Admin\AppData\Local\Temp\Virksomhedsbeskatningers.exe
  "C:\Users\Admin\AppData\Local\Temp\Virksomhedsbeskatningers.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nst11AF.tmp\System.dll

Filesize
11KB

MD5
fc3772787eb239ef4d0399680dcc4343

SHA1
db2fa99ec967178cd8057a14a428a8439a961a73

SHA256
9b93c61c9d63ef8ec80892cc0e4a0877966dca9b0c3eb85555cebd2ddf4d6eed

SHA512
79e491ca4591a5da70116114b7fbb66ee15a0532386035e980c9dfe7afb59b1f9d9c758891e25bfb45c36b07afd3e171bac37a86c887387ef0e80b1eaf296c89

Download Submit
memory/2240-10-0x0000000003990000-0x0000000004C9B000-memory.dmp

Filesize
19.0MB

Download
memory/2240-11-0x0000000076F31000-0x0000000077032000-memory.dmp

Filesize
1.0MB

Download
memory/2240-12-0x0000000076F30000-0x00000000770D9000-memory.dmp

Filesize
1.7MB

Download
memory/2240-15-0x0000000003990000-0x0000000004C9B000-memory.dmp

Filesize
19.0MB

Download
memory/2240-51-0x0000000003990000-0x0000000004C9B000-memory.dmp

Filesize
19.0MB

Download
memory/2600-13-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2600-14-0x0000000076F30000-0x00000000770D9000-memory.dmp

Filesize
1.7MB

Download
memory/2600-38-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2600-42-0x0000000076F30000-0x00000000770D9000-memory.dmp

Filesize
1.7MB

Download