bumblebee | 32d3c8a61ba7a61d1f7466a4a60f7b52bb9bb0e6d000418da5cce79831f55a8c

Resubmissions

13-10-2022 01:21

221013-bqxk7aadg4 10

01-09-2022 11:01

220901-m4kdkacfcm 10

Analysis

max time kernel
47s
max time network
52s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01-09-2022 11:01

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General

Target

GfsFepFIKsNGpt.dll
Size

1.7MB
MD5

14da4c2df839237771865372ce4eee25
SHA1

5b0c15e551f989d1702478a50da3fac5bd3dff87
SHA256

32d3c8a61ba7a61d1f7466a4a60f7b52bb9bb0e6d000418da5cce79831f55a8c
SHA512

dd480f58734d0b5d1b53af599ca665422b1268263bceccd12b9103d95a4554b7b4b781af18eafefc3ba5713ad4cd18ba1513046bad10e7126894bca2761ece17
SSDEEP

49152:7mWxtD5wWHxLrApxq7pMKEngsfyJllGVeTQKP7:7vxtD66xLrsxIpMKEngsfyJllGVeTQKD

Score

10^/10

bumblebee 3108 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

3108

54.203.130.81:428

103.160.22.125:439

100.194.5.156:279

138.10.128.167:465

16.68.199.17:119

49.58.238.45:318

158.121.21.147:265

76.179.109.138:320

219.114.206.84:318

242.123.229.45:306

247.142.48.124:278

137.128.84.3:389

178.18.89.43:472

68.72.230.54:206

253.1.172.156:320

88.12.127.219:297

113.50.222.178:284

135.21.140.60:404

64.44.102.36:443

247.232.101.39:263

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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	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\RSDT\VBOX__	regsvr32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	regsvr32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\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-1-5-21-2591564548-2301609547-1748242483-1000\SOFTWARE\Wine	regsvr32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1708	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\GfsFepFIKsNGpt.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
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:1708

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/1708-54-0x000007FEFC2B1000-0x000007FEFC2B3000-memory.dmp

Filesize
8KB

Download
memory/1708-55-0x0000000002590000-0x00000000026A6000-memory.dmp

Filesize
1.1MB

Download
memory/1708-57-0x0000000002590000-0x00000000026A6000-memory.dmp

Filesize
1.1MB

Download