f24b7c7f0898adf7000ea72688a20f172f114bb490d34d23909a695cb7bb1f34

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
12/10/2022, 18:09

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General

Target

f24b7c7f0898adf7000ea72688a20f172f114bb490d34d23909a695cb7bb1f34.dll
Size

402KB
MD5

60147f59e4c0179c39148067d2446133
SHA1

4b0c6e954827b4c1b01a42c1256cbf75894c9de8
SHA256

f24b7c7f0898adf7000ea72688a20f172f114bb490d34d23909a695cb7bb1f34
SHA512

c700d0d6428cdac9dcc92ec71e323cd29e6874119378f0922607ccc0dd276f4cd1d367c7732edff2cdf2cd5b06bccba71c24272bb0bab88b1459e79fe45c78c4
SSDEEP

12288:TA/O2c4Faj+5SLD6iX73pqhbL66gvNdHo:TA/Raj+ULDF73ebL66qNdI

Score

8^/10

bootkit persistence

Malware Config

Signatures

Blocklisted process makes network request 24 IoCs

flow	pid	Process
12	1200	rundll32.exe
18	1200	rundll32.exe
31	1200	rundll32.exe
42	1200	rundll32.exe
51	1200	rundll32.exe
55	1200	rundll32.exe
61	1200	rundll32.exe
65	1200	rundll32.exe
69	1200	rundll32.exe
73	1200	rundll32.exe
77	1200	rundll32.exe
81	1200	rundll32.exe
87	1200	rundll32.exe
91	1200	rundll32.exe
95	1200	rundll32.exe
99	1200	rundll32.exe
103	1200	rundll32.exe
107	1200	rundll32.exe
111	1200	rundll32.exe
115	1200	rundll32.exe
119	1200	rundll32.exe
123	1200	rundll32.exe
127	1200	rundll32.exe
131	1200	rundll32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\42-9370-15	rundll32.exe
File created	C:\Windows\SysWOW64\245	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 1200	3172	rundll32.exe	82
PID 3172 wrote to memory of 1200	3172	rundll32.exe	82
PID 3172 wrote to memory of 1200	3172	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f24b7c7f0898adf7000ea72688a20f172f114bb490d34d23909a695cb7bb1f34.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f24b7c7f0898adf7000ea72688a20f172f114bb490d34d23909a695cb7bb1f34.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Writes to the Master Boot Record (MBR)
  - Drops file in System32 directory
  PID:1200

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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