bumblebee | 16b4b629f74149b8205efbaae92615f95e571de4865c5b1711622c89fb32e4ab

Analysis

max time kernel
135s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 19:48

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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

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\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

Blocklisted process makes network request 3 IoCs

flow	pid	Process
12	4164	rundll32.exe
40	4164	rundll32.exe
41	4164	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

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-1-5-21-940901362-3608833189-1915618603-1000\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-1-5-21-940901362-3608833189-1915618603-1000\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 64 IoCs

pid	Process
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe
4164	rundll32.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 1932	536	cmd.exe	84
PID 536 wrote to memory of 1932	536	cmd.exe	84
PID 1932 wrote to memory of 4164	1932	cmd.exe	85
PID 1932 wrote to memory of 4164	1932	cmd.exe	85

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\documents.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:536
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start rundll32.exe mkl2n.dll,kXlNkCKgFC
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1932
- - 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
    - Blocklisted process makes network request
    - Checks BIOS information in registry
    - Identifies Wine through registry keys
    - Checks for VirtualBox DLLs, possible anti-VM trick
    - Suspicious behavior: EnumeratesProcesses
    PID:4164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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/4164-0-0x00007FF8A61AD000-0x00007FF8A61AE000-memory.dmp

Filesize
4KB

Download
memory/4164-2-0x00007FF8A6110000-0x00007FF8A6305000-memory.dmp

Filesize
2.0MB

Download
memory/4164-5-0x00007FF8A6110000-0x00007FF8A6305000-memory.dmp

Filesize
2.0MB

Download
memory/4164-4-0x00007FF8A6110000-0x00007FF8A6305000-memory.dmp

Filesize
2.0MB

Download
memory/4164-3-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-1-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-6-0x00007FF8A6110000-0x00007FF8A6305000-memory.dmp

Filesize
2.0MB

Download
memory/4164-7-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-8-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-9-0x00007FF8A61AD000-0x00007FF8A61AE000-memory.dmp

Filesize
4KB

Download
memory/4164-10-0x00007FF8A6110000-0x00007FF8A6305000-memory.dmp

Filesize
2.0MB

Download
memory/4164-11-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-12-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-13-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-14-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download
memory/4164-15-0x00000268A58C0000-0x00000268A5B0B000-memory.dmp

Filesize
2.3MB

Download