bumblebee | fb4d8eab720bfa491d4cd6dc732bb6d2f74c77a37c8056d7eafdb7a01bcba3bd

Analysis

max time kernel
135s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
15-09-2022 11:28

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General

Target

document.lnk
Size

823B
MD5

90442d37ab692ae4654ef8462bd3c1fd
SHA1

3ef15315d9a4b7a557937df3377ad4d7f4be6e85
SHA256

0332e171c940c7f8fe48a803022cd327f588b12e71ecc3bf04bfc97d85a76bea
SHA512

388573ffaef1fab7a408bcc636bb43f1402f51bca76af740f8b654e12a43900165c0b3d96d3d5230ab377a87959e572a41dfdf8a37dc3b0b4a43af9afeb91b51

Score

10^/10

bumblebee vps1 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

VPS1

45.147.229.23:443

Signatures

BumbleBee
BumbleBee is a webshell malware written in C++.
trojan bumblebee

Enumerates VirtualBox registry keys 2 TTPs 5 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	rundll32.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\VBOX__	rundll32.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	rundll32.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	rundll32.exe

Checks BIOS information in registry 2 TTPs 3 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	cmd.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Wine	rundll32.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe
4744	rundll32.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 4704	5044	cmd.exe	81
PID 5044 wrote to memory of 4704	5044	cmd.exe	81
PID 4704 wrote to memory of 4744	4704	cmd.exe	82
PID 4704 wrote to memory of 4744	4704	cmd.exe	82

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\document.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start rundll32 9n3.dll,IternalJob
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4704
- - C:\Windows\system32\rundll32.exe
    rundll32 9n3.dll,IternalJob
    3⤵
    - Enumerates VirtualBox registry keys
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Looks for VirtualBox Guest Additions in registry
    - Looks for VMWare Tools registry key
    - Checks BIOS information in registry
    - Identifies Wine through registry keys
    - Suspicious behavior: EnumeratesProcesses
    PID:4744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4744-134-0x000001B992DB0000-0x000001B992FFD000-memory.dmp

Filesize
2.3MB

Download
memory/4744-135-0x00007FFC7FBA0000-0x00007FFC7FBB0000-memory.dmp

Filesize
64KB

Download