bumblebee | 790695bf25129b28c2f7c1de1428bdf5db8acb34b3a1d38e41c72a80d7278069

Analysis

max time kernel
42s
max time network
47s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
20-10-2022 22:56

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General

Target

NaTfRzldqphjNX.bat
Size

1KB
MD5

6a7f2ccbd058d6f6809cc23b70ea3a58
SHA1

17ac1fa51fe4c6970dd40d238a7b20e6380da69b
SHA256

1a41b969b6533f8429dc8c252963e04ac3b1c911147ff750ea6f357f6ff18434
SHA512

bafeee1d0e3017faa5634acac856cb6bd29a834aa153b64f756360c8675e1f3a4bf06197b929da0bd9dea1da613b7d973b4025fe547861c4529990a34659efc8

Score

10^/10

bumblebee 1810 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

1810

198.98.59.245:443

45.61.185.227:443

45.153.242.242:443

146.19.173.148:443

rc4.plain

Signatures

BumbleBee
BumbleBee is a webshell malware written in C++.
trojan 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

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\VideoBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	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-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Wine	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1684	rundll32.exe

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe
1684	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 1684	1960	cmd.exe	29
PID 1960 wrote to memory of 1684	1960	cmd.exe	29
PID 1960 wrote to memory of 1684	1960	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\NaTfRzldqphjNX.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Windows\System32\rundll32.exe
  C:\Windows\System32\rundll32.exe kcftZUmITYgNCj.dll,regtask
  2⤵
  - 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
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:1684

Network

MITRE ATT&CK Enterprise v6

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/1684-55-0x0000000001F20000-0x0000000002073000-memory.dmp

Filesize
1.3MB

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