bumblebee | b6b436fbe3172c03e34be1d0a1706784d2818764de3b449c978c69141bea22ab

General

Target

toso3l.dll
Size

1.7MB
MD5

4df074f08770a1252223cd82208f313c
SHA1

74c4ea3cf1d02d6d201b44da4670ae276634f89d
SHA256

b6b436fbe3172c03e34be1d0a1706784d2818764de3b449c978c69141bea22ab
SHA512

da5bf600e87d4af3ecc695b4bab9881093e453fc2692b9e2a96be43bc5fa74922180256339a49dad954207f4480474bb58f63ecd549cd1b0fe3d40668384f5aa

Score

10^/10

bumblebee 1406r evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

1406r

C2

39.57.152.217:440

69.161.201.181:382

244.6.154.71:111

193.233.203.156:443

221.106.84.123:307

194.135.33.148:443

111.99.39.11:387

223.243.46.133:147

48.165.175.199:316

78.89.31.86:229

157.17.142.85:406

90.81.8.16:370

21.29.238.98:209

154.56.0.252:443

103.175.16.108:443

188.57.4.52:357

15.209.19.148:466

160.70.24.228:486

33.145.184.132:240

235.126.132.170:106

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\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\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-1-5-21-790309383-526510583-3802439154-1000\SOFTWARE\Wine	rundll32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe
1704	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\toso3l.dll,#1
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 behavior: EnumeratesProcesses
PID:1704

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

4

T1497

Credential Access

Discovery

Query Registry

5

T1012

System Information Discovery

1

T1082

Virtualization/Sandbox Evasion

4

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1704-54-0x0000000002490000-0x00000000025A7000-memory.dmp

Filesize
1.1MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads