guloader | fabdde579b133e129408ab4ecf04fad0a9807fe70bf61383f236dcb7674999e0

Analysis

max time kernel
94s
max time network
205s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2024 00:45

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General

Target

Anfrage_244384.exe
Size

1.2MB
MD5

b03f23199ae987a7bce0ff1a0d742e3e
SHA1

f454c8de72926ee9f98db7056fa89f0c3ada9666
SHA256

eda014e3b658bfbbfd141c1459a3414d9ee8b7c139a3976fe732141fa9cf3f80
SHA512

01ccdc0f586a8926a56f0d3bfee91c5e882bff5df84cbb5363df6681fb62863a8075af8261bb72ecf2360d9d4dc4552dddb4e1ec1da002c24b9416ff0d3f95be
SSDEEP

24576:aCAoDyk/vnt3h1CzLuTIv08yZVk7ku8h7w6/t338euHdB4bU4VD4C:aCAfqvtx1UuTIMfg7ku8Vfx3/uHHSU4t

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 2 IoCs

pid	Process
4340	Anfrage_244384.exe
4340	Anfrage_244384.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1664	Anfrage_244384.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4340	Anfrage_244384.exe
1664	Anfrage_244384.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4340 set thread context of 1664	4340	Anfrage_244384.exe	90

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Bitcom\Paragraferedes75.ret	Anfrage_244384.exe
File opened for modification	C:\Windows\resources\soenderbro.ini	Anfrage_244384.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Anfrage_244384.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Anfrage_244384.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe
1664	Anfrage_244384.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4340	Anfrage_244384.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4340 wrote to memory of 1664	4340	Anfrage_244384.exe	90
PID 4340 wrote to memory of 1664	4340	Anfrage_244384.exe	90
PID 4340 wrote to memory of 1664	4340	Anfrage_244384.exe	90
PID 4340 wrote to memory of 1664	4340	Anfrage_244384.exe	90
PID 4340 wrote to memory of 1664	4340	Anfrage_244384.exe	90

C:\Users\Admin\AppData\Local\Temp\Anfrage_244384.exe
"C:\Users\Admin\AppData\Local\Temp\Anfrage_244384.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4340
- C:\Users\Admin\AppData\Local\Temp\Anfrage_244384.exe
  "C:\Users\Admin\AppData\Local\Temp\Anfrage_244384.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsu8657.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/1664-19-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1664-20-0x0000000001660000-0x00000000042EE000-memory.dmp

Filesize
44.6MB

Download
memory/1664-24-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1664-25-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1664-26-0x0000000001660000-0x00000000042EE000-memory.dmp

Filesize
44.6MB

Download
memory/1664-27-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1664-28-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1664-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4340-16-0x0000000002AC0000-0x000000000574E000-memory.dmp

Filesize
44.6MB

Download
memory/4340-17-0x00000000776E1000-0x0000000077801000-memory.dmp

Filesize
1.1MB

Download
memory/4340-18-0x0000000002AC0000-0x000000000574E000-memory.dmp

Filesize
44.6MB

Download