bumblebee | c60c8153f45af6012d9f85074886fcf627e34e0c92db133207934fd3eadd2770

General

Target

sec.dll
Size

1.7MB
MD5

a30bf883c38b54c3b22a2f8ccfb1bd8a
SHA1

9a5ec009753040c5214b864d9d271901eb4542ac
SHA256

95a6114c8b9879ebc9a0142fcd46d41dd428380a27d5b396a232f42e4a505fb2
SHA512

64d3f30c8564e4eedecd7f3f8c3b1eafaa3d781fb5bef39825ea1b8fdd1f39c38ac477f08a7a147fcb2f404c32ded7ae841b5bb443070945e1aa60668838ed58
SSDEEP

49152:Vf0KjZAxHascQO0L+CyceKgNdjBqYa4xvmuH6BrxUsV:VsWSNWH06CycAoTuH6BrxUsV

Score

10^/10

bumblebee 286a evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

286a

C2

185.62.58.175:443

209.141.58.141:443

103.175.16.116:443

146.70.106.52:443

108.62.118.145:443

154.56.0.112:443

172.93.193.187:443

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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	regsvr32.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__	regsvr32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\VBOX__	regsvr32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	regsvr32.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	regsvr32.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	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	regsvr32.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-1-5-21-1846800975-3917212583-2893086201-1000\SOFTWARE\Wine	regsvr32.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	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe
2096	regsvr32.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\sec.dll
1⤵
- 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:2096

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2096-5-0x0000000002550000-0x0000000002666000-memory.dmp

Filesize
1.1MB

Download
memory/2096-0-0x0000000077701000-0x0000000077702000-memory.dmp

Filesize
4KB

Download
memory/2096-6-0x00000000776B0000-0x0000000077859000-memory.dmp

Filesize
1.7MB

Download
memory/2096-4-0x00000000776B0000-0x0000000077859000-memory.dmp

Filesize
1.7MB

Download
memory/2096-3-0x0000000002550000-0x0000000002666000-memory.dmp

Filesize
1.1MB

Download
memory/2096-1-0x0000000002550000-0x0000000002666000-memory.dmp

Filesize
1.1MB

Download
memory/2096-7-0x00000000776B0000-0x0000000077859000-memory.dmp

Filesize
1.7MB

Download
memory/2096-9-0x00000000776B0000-0x0000000077859000-memory.dmp

Filesize
1.7MB

Download
memory/2096-8-0x00000000776B0000-0x0000000077859000-memory.dmp

Filesize
1.7MB

Download
memory/2096-11-0x00000000776B0000-0x0000000077859000-memory.dmp

Filesize
1.7MB

Download
memory/2096-10-0x0000000002550000-0x0000000002666000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads