bumblebee | de4a414a2f1f7f52e1febf7246605fb2c3b5af4fe7dc9af482321e812da5a1eb

Analysis

max time kernel
91s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21/09/2022, 19:25

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General

Target

gate.ps1
Size

197B
MD5

f6fb7d0f27c0f475c1c8e4ee5a926c0a
SHA1

81e71f0b5d07eae5d6adcaed5365131058747f34
SHA256

de4a414a2f1f7f52e1febf7246605fb2c3b5af4fe7dc9af482321e812da5a1eb
SHA512

fe4dc9d0e48805906e20e0d3d2565a24328171a597603baabb340c4b348f78db598746d088621ec758e690f92b0d0b5ee2bad1046855612b0008cd31d65b0b72

Score

10^/10

bumblebee 1209 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

1209

142.11.211.32:443

146.59.116.49:443

192.236.155.219:443

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\VBoxVideo	rundll32.exe
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

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\FADT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\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 1 IoCs

flow	pid	Process
5	2608	powershell.exe

Downloads MZ/PE file

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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Wine	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1624	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1624	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2608	powershell.exe
2608	powershell.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe
1624	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2608	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 1624	2608	powershell.exe	83
PID 2608 wrote to memory of 1624	2608	powershell.exe	83

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\gate.ps1
1⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Windows\System32\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\ebVPMo.bin,vcsfile
  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
  - Loads dropped DLL
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:1624

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

C:\Users\Admin\AppData\Local\ebVPMo.bin

Filesize
2.8MB

MD5
45f2a624cbbe8d161223c27b177a968e

SHA1
954b8a64f3f02975929efde03d5d03db4df11f87

SHA256
2352cdd577a7a365388143c58c8b854be107ff03da84453578f707f60c78ea31

SHA512
0369024782981aca55cfb7a1411285b1b7422ca1ac0bcdfbaebf8ceb22fdc6be6a7a051fd025935d3f5791915dde1fb9c0a69375f81073e0a6b1aebfef072c3f

Download Submit
C:\Users\Admin\AppData\Local\ebVPMo.bin

Filesize
2.8MB

MD5
45f2a624cbbe8d161223c27b177a968e

SHA1
954b8a64f3f02975929efde03d5d03db4df11f87

SHA256
2352cdd577a7a365388143c58c8b854be107ff03da84453578f707f60c78ea31

SHA512
0369024782981aca55cfb7a1411285b1b7422ca1ac0bcdfbaebf8ceb22fdc6be6a7a051fd025935d3f5791915dde1fb9c0a69375f81073e0a6b1aebfef072c3f

Download Submit
memory/1624-138-0x000002113DEC0000-0x000002113E020000-memory.dmp

Filesize
1.4MB

Download
memory/2608-132-0x000001DB68730000-0x000001DB68752000-memory.dmp

Filesize
136KB

Download
memory/2608-133-0x00007FFC18140000-0x00007FFC18C01000-memory.dmp

Filesize
10.8MB

Download
memory/2608-137-0x00007FFC18140000-0x00007FFC18C01000-memory.dmp

Filesize
10.8MB

Download