bumblebee | 2a1a84b0f5f71353f09d6a01b0504e4a99b19565f2a1207ee2223a4e7918e541

Analysis

max time kernel
137s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-12-2024 00:47

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General

Target

documents.lnk
Size

2KB
MD5

663851b4f1b3ad5acd85c4ab15493e71
SHA1

32060a7f992322ac9bdf6d976d60181111b571d6
SHA256

68e3bf7eec93dfd4394746769532dbc890207fd6f554c18165e8a2746b3fe2d2
SHA512

0d51286f76f3f8fd292574b97803891571e3c20a110e7b830208591f69fab86941708e1751d3851724b0a12f610ba603afb259451c9e480e42fc306d0688e828

Score

10^/10

bumblebee 276r evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

276r

192.119.77.100:443

54.37.131.14:443

146.19.253.56:443

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 7 IoCs

flow	pid	Process
12	1984	rundll32.exe
18	1984	rundll32.exe
36	1984	rundll32.exe
40	1984	rundll32.exe
41	1984	rundll32.exe
47	1984	rundll32.exe
48	1984	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-1-5-21-4089630652-1596403869-279772308-1000\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-1-5-21-4089630652-1596403869-279772308-1000\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
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 1984	1288	cmd.exe	83
PID 1288 wrote to memory of 1984	1288	cmd.exe	83

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:1288
- C:\Windows\System32\rundll32.exe
  "C:\Windows\System32\rundll32.exe" n3zarek.dll,RoOEiztJvW
  2⤵
  - 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:1984

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/1984-0-0x00007FFC9CC4D000-0x00007FFC9CC4E000-memory.dmp

Filesize
4KB

Download
memory/1984-1-0x0000022C79EC0000-0x0000022C79FD6000-memory.dmp

Filesize
1.1MB

Download
memory/1984-2-0x0000022C79EC0000-0x0000022C79FD6000-memory.dmp

Filesize
1.1MB

Download
memory/1984-5-0x00007FFC9CBB0000-0x00007FFC9CDA5000-memory.dmp

Filesize
2.0MB

Download
memory/1984-6-0x00007FFC9CBB0000-0x00007FFC9CDA5000-memory.dmp

Filesize
2.0MB

Download
memory/1984-4-0x00007FFC9CBB0000-0x00007FFC9CDA5000-memory.dmp

Filesize
2.0MB

Download
memory/1984-3-0x00007FFC9CBB0000-0x00007FFC9CDA5000-memory.dmp

Filesize
2.0MB

Download
memory/1984-7-0x0000022C79EC0000-0x0000022C79FD6000-memory.dmp

Filesize
1.1MB

Download
memory/1984-8-0x0000022C79EC0000-0x0000022C79FD6000-memory.dmp

Filesize
1.1MB

Download
memory/1984-9-0x00007FFC9CC4D000-0x00007FFC9CC4E000-memory.dmp

Filesize
4KB

Download
memory/1984-10-0x00007FFC9CBB0000-0x00007FFC9CDA5000-memory.dmp

Filesize
2.0MB

Download
memory/1984-11-0x0000022C79EC0000-0x0000022C79FD6000-memory.dmp

Filesize
1.1MB

Download
memory/1984-12-0x0000022C79EC0000-0x0000022C79FD6000-memory.dmp

Filesize
1.1MB

Download