guloader | 0920bc3a9993954c4c2f092677b4a629be306568d7d8226b24c516ffb069f41e

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
06-04-2024 07:12

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General

Target

TERMINI CONTRATTUALI-pdf.exe
Size

735KB
MD5

9dc6e6f488005a6ec8fb5cbba886a895
SHA1

52be39191db4a22ab8ad3f728619eb636a5011e3
SHA256

0920bc3a9993954c4c2f092677b4a629be306568d7d8226b24c516ffb069f41e
SHA512

ad64c576130040a4191e390605fcd3bf1ed06251ce6775edfdfd8e351df7ca6cc4e70a3bf1b13643cb462601d5192d059cf8e1684c526fe358fc6284074c4e63
SSDEEP

12288:Mo9kxG4/BCd3qVDkkbJrvEnqKJVQImTywmHBjLrAX:MGkv56QDbEqKJrwOrAX

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
2612	TERMINI CONTRATTUALI-pdf.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rnnebrs\skifteres.ind	TERMINI CONTRATTUALI-pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2612	TERMINI CONTRATTUALI-pdf.exe
2576	TERMINI CONTRATTUALI-pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2612 set thread context of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28

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
2612	TERMINI CONTRATTUALI-pdf.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28
PID 2612 wrote to memory of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28
PID 2612 wrote to memory of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28
PID 2612 wrote to memory of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28
PID 2612 wrote to memory of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28
PID 2612 wrote to memory of 2576	2612	TERMINI CONTRATTUALI-pdf.exe	28

C:\Users\Admin\AppData\Local\Temp\TERMINI CONTRATTUALI-pdf.exe
"C:\Users\Admin\AppData\Local\Temp\TERMINI CONTRATTUALI-pdf.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2612
- C:\Users\Admin\AppData\Local\Temp\TERMINI CONTRATTUALI-pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\TERMINI CONTRATTUALI-pdf.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2576

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

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsd18EE.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
memory/2576-18-0x00000000004B0000-0x0000000001512000-memory.dmp

Filesize
16.4MB

Download
memory/2576-14-0x0000000001520000-0x0000000003D06000-memory.dmp

Filesize
39.9MB

Download
memory/2576-15-0x0000000077930000-0x0000000077AD9000-memory.dmp

Filesize
1.7MB

Download
memory/2576-17-0x0000000077B56000-0x0000000077B57000-memory.dmp

Filesize
4KB

Download
memory/2576-20-0x0000000001520000-0x0000000003D06000-memory.dmp

Filesize
39.9MB

Download
memory/2576-21-0x0000000077B20000-0x0000000077BF6000-memory.dmp

Filesize
856KB

Download
memory/2612-11-0x0000000077930000-0x0000000077AD9000-memory.dmp

Filesize
1.7MB

Download
memory/2612-12-0x0000000077B20000-0x0000000077BF6000-memory.dmp

Filesize
856KB

Download
memory/2612-13-0x0000000075390000-0x0000000075397000-memory.dmp

Filesize
28KB

Download
memory/2612-16-0x0000000004030000-0x0000000006816000-memory.dmp

Filesize
39.9MB

Download
memory/2612-10-0x0000000004030000-0x0000000006816000-memory.dmp

Filesize
39.9MB

Download
memory/2612-26-0x0000000004030000-0x0000000006816000-memory.dmp

Filesize
39.9MB

Download