2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459

Analysis

max time kernel
141s
max time network
142s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
29-08-2024 06:46

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General

Target

exbuild.exe
Size

416KB
MD5

f5d7b79ee6b6da6b50e536030bcc3b59
SHA1

751b555a8eede96d55395290f60adc43b28ba5e2
SHA256

2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459
SHA512

532b17cd2a6ac5172b1ddba1e63edd51ab53a4527204415241e3a78e8ffeb9728071bde5ae1eefabefd2627f00963f8a5458668cd7b8df041c8683252ff56b46
SSDEEP

12288:ISqMakU3v+GYLWIjD9dSbvBG5u2uQjdQco:jq53v+G4Wwub8Ljaco

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

Hkbsse.exe

pid	Process
2720	Hkbsse.exe

Loads dropped DLL 1 IoCs

Processes:

exbuild.exe

pid	Process
1548	exbuild.exe

Drops file in Windows directory 1 IoCs

Processes:

exbuild.exe

description	ioc	Process
File created	C:\Windows\Tasks\Hkbsse.job	exbuild.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

Processes:

exbuild.exeHkbsse.exe

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

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

exbuild.exe

pid	Process
1548	exbuild.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

exbuild.exe

description	pid	Process	procid_target
PID 1548 wrote to memory of 2720	1548	exbuild.exe	30
PID 1548 wrote to memory of 2720	1548	exbuild.exe	30
PID 1548 wrote to memory of 2720	1548	exbuild.exe	30
PID 1548 wrote to memory of 2720	1548	exbuild.exe	30

C:\Users\Admin\AppData\Local\Temp\exbuild.exe
"C:\Users\Admin\AppData\Local\Temp\exbuild.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
  "C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2720

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\054fdc5f70\Hkbsse.exe

Filesize
416KB

MD5
f5d7b79ee6b6da6b50e536030bcc3b59

SHA1
751b555a8eede96d55395290f60adc43b28ba5e2

SHA256
2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459

SHA512
532b17cd2a6ac5172b1ddba1e63edd51ab53a4527204415241e3a78e8ffeb9728071bde5ae1eefabefd2627f00963f8a5458668cd7b8df041c8683252ff56b46

Download Submit
memory/1548-1-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download