guloader | 53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534

General

Target

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
Size

694KB
MD5

74f8407f98ac51a0b9feb8782bd8f7c9
SHA1

d49d93ac8941442fe52eda4b1240f3afd620bb08
SHA256

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534
SHA512

9ee6d913eeabc524e2f271b87e7df993adeb886299ec12ceb81790355d234439fac5ab2c98f6cbcca6742bcb0abe3fd603add6bcdd17ea0bf8ebdda12c6aa790
SSDEEP

12288:xXFAO0Qb6xMem7HGKCdt44epEx3linXjVdiyqkkHnZ4CCVjscJ4nX0q2mY9+QQhX:xXFN0Yem7Q3yOx3gnXRdiZ9HkV+nX0qj

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 1 IoCs

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

pid process

3196 53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

pid	process
3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
3716	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

description	pid	process	target process
PID 3196 set thread context of 3716	3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

Drops file in Windows directory 1 IoCs

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

description ioc process

File opened for modification C:\Windows\fips\beskydende.ini 53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\fips\beskydende.ini	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

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

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

pid process

3196 53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

description	pid	process	target process
PID 3196 wrote to memory of 3716	3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
PID 3196 wrote to memory of 3716	3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
PID 3196 wrote to memory of 3716	3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
PID 3196 wrote to memory of 3716	3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
PID 3196 wrote to memory of 3716	3196	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe	53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe

C:\Users\Admin\AppData\Local\Temp\53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
"C:\Users\Admin\AppData\Local\Temp\53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.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:3196
- C:\Users\Admin\AppData\Local\Temp\53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe
  "C:\Users\Admin\AppData\Local\Temp\53a703b29d5aebc4a0b5794d0904e49aa90d72525018df4f9121e5da86116534.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nstA9AF.tmp\System.dll

Filesize
12KB

MD5
4add245d4ba34b04f213409bfe504c07

SHA1
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

SHA256
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

SHA512
1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

Download Submit
memory/3196-12-0x00000000056D0000-0x000000000772E000-memory.dmp

Filesize
32.4MB

Download
memory/3196-13-0x00000000056D0000-0x000000000772E000-memory.dmp

Filesize
32.4MB

Download
memory/3196-14-0x0000000077441000-0x0000000077561000-memory.dmp

Filesize
1.1MB

Download
memory/3196-15-0x0000000077441000-0x0000000077561000-memory.dmp

Filesize
1.1MB

Download
memory/3196-16-0x0000000073B35000-0x0000000073B36000-memory.dmp

Filesize
4KB

Download
memory/3196-18-0x00000000056D0000-0x000000000772E000-memory.dmp

Filesize
32.4MB

Download
memory/3716-17-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3716-19-0x0000000001660000-0x00000000036BE000-memory.dmp

Filesize
32.4MB

Download
memory/3716-20-0x0000000001660000-0x00000000036BE000-memory.dmp

Filesize
32.4MB

Download
memory/3716-21-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads