guloader | bc61179fcc03e546819401cc9645fd5ddacf3d3403e6c1c54b1d99488535b1e0

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-10-2024 17:08

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General

Target

Beklaedte.exe
Size

606KB
MD5

cf8ede5bc41c100855b170b857629751
SHA1

b99057a6573a0fcc29f182fb818299c532bd366c
SHA256

6892cea7d275266ae66c8584a3875c36d5cddd6bfef1faaf1d8e798dc570bb36
SHA512

23c77fab74507f98605d40af65da88795f8d61923cb6bf34c8a2c90e2de50601b92ea34cc9a389a8775136acd72fbf9b8aadcd752c05ecc2f132b01c39539628
SSDEEP

12288:N22twlGRvdn5CD0sCk/sa8xJBknPoRgovCi906OLq:N22twlcv80sF/2BSP+grf6OG

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
560	Beklaedte.exe

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

Web Service

T1102

flow	ioc
17	drive.google.com
16	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\nonsurgically\skmbillede.smr	Beklaedte.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2688	Beklaedte.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
560	Beklaedte.exe
2688	Beklaedte.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 560 set thread context of 2688	560	Beklaedte.exe	87

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Fljtenists.ini	Beklaedte.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	Beklaedte.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Beklaedte.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe
2688	Beklaedte.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
560	Beklaedte.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 560 wrote to memory of 2688	560	Beklaedte.exe	87
PID 560 wrote to memory of 2688	560	Beklaedte.exe	87
PID 560 wrote to memory of 2688	560	Beklaedte.exe	87
PID 560 wrote to memory of 2688	560	Beklaedte.exe	87
PID 560 wrote to memory of 2688	560	Beklaedte.exe	87

C:\Users\Admin\AppData\Local\Temp\Beklaedte.exe
"C:\Users\Admin\AppData\Local\Temp\Beklaedte.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:560
- C:\Users\Admin\AppData\Local\Temp\Beklaedte.exe
  "C:\Users\Admin\AppData\Local\Temp\Beklaedte.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2688

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nshBD56.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/560-30-0x0000000002C50000-0x0000000005395000-memory.dmp

Filesize
39.3MB

Download
memory/560-11-0x0000000002C50000-0x0000000005395000-memory.dmp

Filesize
39.3MB

Download
memory/560-12-0x0000000077461000-0x0000000077581000-memory.dmp

Filesize
1.1MB

Download
memory/560-14-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/560-13-0x0000000077461000-0x0000000077581000-memory.dmp

Filesize
1.1MB

Download
memory/560-10-0x0000000002C50000-0x0000000005395000-memory.dmp

Filesize
39.3MB

Download
memory/2688-29-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2688-16-0x0000000001660000-0x0000000003DA5000-memory.dmp

Filesize
39.3MB

Download
memory/2688-15-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2688-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2688-32-0x0000000001660000-0x0000000003DA5000-memory.dmp

Filesize
39.3MB

Download
memory/2688-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2688-34-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2688-38-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download