bumblebee | c97b8bffcbe424cbc2a6e1135068d071c6f4e8f020fccd2db3dbee3aa80102ac

General

Target

c97b8bffcbe424cbc2a6e1135068d071c6f4e8f020fccd2db3dbee3aa80102ac.dll
Size

2.7MB
MD5

59baede0aac3a38c8578aa8fef89d960
SHA1

19fa63af83dfed8023f10147c33c8edb6aabb1b4
SHA256

c97b8bffcbe424cbc2a6e1135068d071c6f4e8f020fccd2db3dbee3aa80102ac
SHA512

f87e5285a22df54906ee18ba71334beba5dd36cf8cfb3ac8f0f44e8bfe8441ba95e3c6787dc9cb9c274f01aec724500d5d2a3ff3c466f8efdf08bac8b35400ed
SSDEEP

49152:7CkeRD2DBKMpRd8qsToHaQBVeytTEmu6+lzz7JP1KV3jgjO4gYAPLokp6vVkTMU:7CkdB/pRdksaQBVNtTEmu6+lzz7JP1KT

Score

10^/10

bumblebee all0604 evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

ALL0604

C2

192.236.198.63:443

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\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 6 IoCs

flow	pid	Process
21	3920	rundll32.exe
41	3920	rundll32.exe
44	3920	rundll32.exe
48	3920	rundll32.exe
49	3920	rundll32.exe
54	3920	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-1-5-21-557049126-2506969350-2798870634-1000\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

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe
3920	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c97b8bffcbe424cbc2a6e1135068d071c6f4e8f020fccd2db3dbee3aa80102ac.dll,#1
1⤵
- 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:3920

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

2

T1082

Virtualization/Sandbox Evasion

4

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3920-0-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-2-0x00007FF875BD0000-0x00007FF875DC5000-memory.dmp

Filesize
2.0MB

Download
memory/3920-1-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-3-0x00007FF875BD0000-0x00007FF875DC5000-memory.dmp

Filesize
2.0MB

Download
memory/3920-4-0x00007FF875BD0000-0x00007FF875DC5000-memory.dmp

Filesize
2.0MB

Download
memory/3920-5-0x00007FF875BD0000-0x00007FF875DC5000-memory.dmp

Filesize
2.0MB

Download
memory/3920-6-0x00007FF875BD0000-0x00007FF875DC5000-memory.dmp

Filesize
2.0MB

Download
memory/3920-7-0x00007FF875BC0000-0x00007FF875BD0000-memory.dmp

Filesize
64KB

Download
memory/3920-8-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-9-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-10-0x00007FF875BD0000-0x00007FF875DC5000-memory.dmp

Filesize
2.0MB

Download
memory/3920-11-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-12-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-13-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-14-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-15-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-16-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-17-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-18-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-19-0x000001F79F9F0000-0x000001F79FC3B000-memory.dmp

Filesize
2.3MB

Download
memory/3920-20-0x000001F79F9F0000-0x000001F79FC3B000-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