bumblebee | e7b4f762acf0e397919f1e1dfd96322efff2f5e97e79b7cd5456bf63808c2e53

General

Target

NDA.lnk

Score

10^/10

bumblebee 0310 evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

0310

C2

146.59.117.200:443

192.255.188.11:443

149.3.170.62:443

rc4.plain

Signatures

BumbleBee
BumbleBee is a loader malware written in C++.
loader bumblebee
Bumblebee family
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\VBoxGuest	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	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\DSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\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

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

Executes dropped EXE 1 IoCs

pid	Process
2940	rundll32.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-1-5-21-1163522206-1469769407-485553996-1000\SOFTWARE\Wine	rundll32.exe

Loads dropped DLL 5 IoCs

pid	Process
2820	cmd.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2940	rundll32.exe

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	rundll32.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2908	timeout.exe

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe
2940	rundll32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 2820	2604	cmd.exe	31
PID 2604 wrote to memory of 2820	2604	cmd.exe	31
PID 2604 wrote to memory of 2820	2604	cmd.exe	31
PID 2820 wrote to memory of 2884	2820	cmd.exe	32
PID 2820 wrote to memory of 2884	2820	cmd.exe	32
PID 2820 wrote to memory of 2884	2820	cmd.exe	32
PID 2820 wrote to memory of 2888	2820	cmd.exe	33
PID 2820 wrote to memory of 2888	2820	cmd.exe	33
PID 2820 wrote to memory of 2888	2820	cmd.exe	33
PID 2820 wrote to memory of 2908	2820	cmd.exe	34
PID 2820 wrote to memory of 2908	2820	cmd.exe	34
PID 2820 wrote to memory of 2908	2820	cmd.exe	34
PID 2820 wrote to memory of 2940	2820	cmd.exe	35
PID 2820 wrote to memory of 2940	2820	cmd.exe	35
PID 2820 wrote to memory of 2940	2820	cmd.exe	35

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\NDA.lnk
1⤵
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /b /min xco^py /y C:\Windows\System32\rund*.exe c:\programdata && start /b /min xco^py /h /y cr^eat^or.dll c:\programdata && cd c:\programdata && timeout 1 && start /b /min r^u^ndll32.exe creator.dll,runprog && exit
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Windows\system32\xcopy.exe
    xcopy /y C:\Windows\System32\rund*.exe c:\programdata
    3⤵
    PID:2884
- - C:\Windows\system32\xcopy.exe
    xcopy /h /y creator.dll c:\programdata
    3⤵
    PID:2888
- - C:\Windows\system32\timeout.exe
    timeout 1
    3⤵
    - Delays execution with timeout.exe
    PID:2908
- - \??\c:\ProgramData\rundll32.exe
    rundll32.exe creator.dll,runprog
    3⤵
    - Enumerates VirtualBox registry keys
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Looks for VirtualBox Guest Additions in registry
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Identifies Wine through registry keys
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Checks for VirtualBox DLLs, possible anti-VM trick
    - Suspicious behavior: EnumeratesProcesses
    PID:2940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

4

T1497

Credential Access

Discovery

Query Registry

5

T1012

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

4

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\??\c:\ProgramData\creator.dll

Filesize
2.8MB

MD5
f7e264d654ad023794222f1e2fa866e6

SHA1
0f5a405879ce713986b4940a51158bd2ee99e750

SHA256
177a9689065b14408eb7af71432ec9a621d56fba5182cd74f3690e989a95d023

SHA512
82bd12740934ff7608419770fd205f0ddd57bd418ecee827834866414cda9265e9600ad7931097942838df4dddcc751c0e31b1e5736c4e3f52e054c5e7bf2f6b

Download Submit
\ProgramData\rundll32.exe

Filesize
44KB

MD5
dd81d91ff3b0763c392422865c9ac12e

SHA1
963b55acc8c566876364716d5aafa353995812a8

SHA256
f5691b8f200e3196e6808e932630e862f8f26f31cd949981373f23c9d87db8b9

SHA512
8a5036ccab9c9e71deb4ecb9598528ca19c2d697a836846d23e1547b24172fa236a798092c7db676929abff830e40f52ce8f3b3bdd8d4c2553d7c021fceaf120

Download Submit
memory/2940-53-0x00000000771D0000-0x0000000077379000-memory.dmp

Filesize
1.7MB

Download
memory/2940-52-0x0000000002080000-0x00000000021D3000-memory.dmp

Filesize
1.3MB

Download
memory/2940-51-0x0000000077221000-0x0000000077222000-memory.dmp

Filesize
4KB

Download
memory/2940-55-0x00000000771D0000-0x0000000077379000-memory.dmp

Filesize
1.7MB

Download
memory/2940-56-0x00000000771D0000-0x0000000077379000-memory.dmp

Filesize
1.7MB

Download
memory/2940-54-0x00000000771D0000-0x0000000077379000-memory.dmp

Filesize
1.7MB

Download
memory/2940-57-0x00000000771D0000-0x0000000077379000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads