bumblebee | acb4007ac2eb34445394cbe66bd45782ff77119e05e5aa2b58567ef3a07b7755

Analysis

max time kernel
146s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
23-09-2024 17:12

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General

Target

documents.lnk
Size

1KB
MD5

3cdae338d436fa208f373fe79abc6263
SHA1

1922c3c625c8d7bbc7c6e5cc0adcea69b7b14722
SHA256

d96eeee2860e53d004977c823980b5ecc619e4d875ea545723ff1d8e6c526e6c
SHA512

d951b3be527a0b4034fff01a6a75246c416660279163785e7b4d4462a6fbdf9177158862c7ad958e1861b0a9212265df081647b2ac4182b59fce8535ab3b28b2

Score

10^/10

bumblebee 2504r evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

2504r

104.168.236.99:443

23.82.141.184:443

172.241.29.169:443

rc4.plain

Signatures

BumbleBee
BumbleBee is a loader malware written in C++.
loader 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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	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 6 IoCs

flow	pid	Process
15	1408	rundll32.exe
23	1408	rundll32.exe
37	1408	rundll32.exe
46	1408	rundll32.exe
47	1408	rundll32.exe
49	1408	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-1-5-21-1194130065-3471212556-1656947724-1000\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-1-5-21-1194130065-3471212556-1656947724-1000\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
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 2388	2992	cmd.exe	83
PID 2992 wrote to memory of 2388	2992	cmd.exe	83
PID 2388 wrote to memory of 1408	2388	cmd.exe	84
PID 2388 wrote to memory of 1408	2388	cmd.exe	84

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:2992
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start rundll32.exe 9hloq0.dll,VcrbRMwpuk
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2388
- - C:\Windows\system32\rundll32.exe
    rundll32.exe 9hloq0.dll,VcrbRMwpuk
    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:1408

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

Replay Monitor

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Downloads

memory/1408-0-0x00007FFE6B62D000-0x00007FFE6B62E000-memory.dmp

Filesize
4KB

Download
memory/1408-1-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-5-0x00007FFE6B590000-0x00007FFE6B785000-memory.dmp

Filesize
2.0MB

Download
memory/1408-4-0x00007FFE6B590000-0x00007FFE6B785000-memory.dmp

Filesize
2.0MB

Download
memory/1408-3-0x00007FFE6B590000-0x00007FFE6B785000-memory.dmp

Filesize
2.0MB

Download
memory/1408-2-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-6-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-7-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-8-0x00007FFE6B62D000-0x00007FFE6B62E000-memory.dmp

Filesize
4KB

Download
memory/1408-9-0x00007FFE6B590000-0x00007FFE6B785000-memory.dmp

Filesize
2.0MB

Download
memory/1408-10-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-11-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-12-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-13-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-14-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-15-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-16-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-17-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-18-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download
memory/1408-19-0x000001E7E6700000-0x000001E7E694B000-memory.dmp

Filesize
2.3MB

Download