bumblebee | 16b4b629f74149b8205efbaae92615f95e571de4865c5b1711622c89fb32e4ab

General

Target

documents.lnk
Size

1KB
MD5

b359682d874fc19cf48c9e37c8fbc996
SHA1

e03f2b064fd253df039919ce9afab54fb4861d14
SHA256

9139646892f67f12dd2a9d2b43a7ae28f1556f5e42332effcf6ea17a63794a44
SHA512

c030ccc539aeb693e55cf80bcc531732426b6ca41e04cd335d3c22e4f9d812d53a4edf543133322652923d2cb3c0d68ccc0ea8399ce15a11cb21b8a50083a9b8

Score

10^/10

bumblebee 205r evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

205r

C2

45.153.243.93:443

213.232.235.199:443

206.54.190.245:443

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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	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\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	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-1-5-21-2039016743-699959520-214465309-1000\SOFTWARE\Wine	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

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe
2724	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2568 wrote to memory of 2920	2568	cmd.exe	31
PID 2568 wrote to memory of 2920	2568	cmd.exe	31
PID 2568 wrote to memory of 2920	2568	cmd.exe	31
PID 2920 wrote to memory of 2724	2920	cmd.exe	32
PID 2920 wrote to memory of 2724	2920	cmd.exe	32
PID 2920 wrote to memory of 2724	2920	cmd.exe	32

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\documents.lnk
1⤵
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start rundll32.exe mkl2n.dll,kXlNkCKgFC
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2920
- - C:\Windows\system32\rundll32.exe
    rundll32.exe mkl2n.dll,kXlNkCKgFC
    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
    - Identifies Wine through registry keys
    - Checks for VirtualBox DLLs, possible anti-VM trick
    - Suspicious behavior: EnumeratesProcesses
    PID:2724

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

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Downloads

memory/2724-37-0x0000000002010000-0x000000000225B000-memory.dmp

Filesize
2.3MB

Download
memory/2724-36-0x0000000076DC1000-0x0000000076DC2000-memory.dmp

Filesize
4KB

Download
memory/2724-42-0x0000000076D70000-0x0000000076F19000-memory.dmp

Filesize
1.7MB

Download
memory/2724-41-0x0000000076D70000-0x0000000076F19000-memory.dmp

Filesize
1.7MB

Download
memory/2724-40-0x0000000076D70000-0x0000000076F19000-memory.dmp

Filesize
1.7MB

Download
memory/2724-38-0x0000000002010000-0x000000000225B000-memory.dmp

Filesize
2.3MB

Download
memory/2724-39-0x0000000076D70000-0x0000000076F19000-memory.dmp

Filesize
1.7MB

Download
memory/2724-44-0x0000000076D70000-0x0000000076F19000-memory.dmp

Filesize
1.7MB

Download
memory/2724-43-0x0000000002010000-0x000000000225B000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads