bumblebee | 8149cfdaf8eb8c810c0439a3461c62f032b268448b6054a78157a425a4ce679c

Resubmissions

11/06/2022, 13:38

220611-qxsm5sbaa9 10

30/03/2022, 15:09

220330-sjyncadcd5 9

Analysis

max time kernel
42s
max time network
45s
platform
windows7_x64
resource
win7-20220414-en
submitted
11/06/2022, 13:38

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General

Target

appbuild.exe
Size

3.0MB
MD5

cd2cce5e7cc63f6947305cfe8509d3a9
SHA1

677517444d5311991874856e9a56959eb4f22eb0
SHA256

9d75278f48c145f9bdb1c7916ab92965fa5a079de0fd8d22a894b2307b80f2c1
SHA512

f3ee3854340906a127f24ed0bb1eb56c53abef4e4fbb1472a6b2cda1ad9fe51dff1cf0ff19e707c47fe0e415381ac8ab2c3ed08a1ac15902262cd4992417047d

Score

10^/10

bumblebee leg1 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

LEG1

45.147.229.177:443

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\VBoxSF	appbuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	appbuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	appbuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	appbuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	appbuild.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__	appbuild.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\VBOX__	appbuild.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	appbuild.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	appbuild.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	appbuild.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	appbuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	appbuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	appbuild.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-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Wine	appbuild.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe
308	appbuild.exe

C:\Users\Admin\AppData\Local\Temp\appbuild.exe
"C:\Users\Admin\AppData\Local\Temp\appbuild.exe"
1⤵
- Enumerates VirtualBox registry keys
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious behavior: EnumeratesProcesses
PID:308

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

Replay Monitor

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Downloads

memory/308-54-0x0000000001C20000-0x0000000001E6D000-memory.dmp

Filesize
2.3MB

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