c2b25ce1681b85c91b5e28075f1c7d9903630c167e5b4aa5d8bb1f6bf5b829b7

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03-10-2022 12:03

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General

Target

c2b25ce1681b85c91b5e28075f1c7d9903630c167e5b4aa5d8bb1f6bf5b829b7.dll
Size

432KB
MD5

4e19b670b3bc0e01f0cc7b0ce614228b
SHA1

0583e12b60b79a82273f57886eff57224332151e
SHA256

c2b25ce1681b85c91b5e28075f1c7d9903630c167e5b4aa5d8bb1f6bf5b829b7
SHA512

ed682f79728c73b64a93f8520e098fa2b9980f587f0ade888b529119e1a97d22d714d002a95c352bb6e9170cfc8e08310c7273734f62fbd1f956b5fed29a5d6f
SSDEEP

12288:VHz7hkIQlAZ+k5lPOYimk7uU2SNmlTBHZYK:VHUlA35lWYiiU2uO/

Score

8^/10

bootkit persistence

Malware Config

Signatures

Blocklisted process makes network request 9 IoCs

flow	pid	Process
6	1448	rundll32.exe
8	1448	rundll32.exe
10	1448	rundll32.exe
11	1448	rundll32.exe
12	1448	rundll32.exe
14	1448	rundll32.exe
15	1448	rundll32.exe
16	1448	rundll32.exe
17	1448	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\6552-347	rundll32.exe
File created	C:\Windows\SysWOW64\0876	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28
PID 1976 wrote to memory of 1448	1976	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c2b25ce1681b85c91b5e28075f1c7d9903630c167e5b4aa5d8bb1f6bf5b829b7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c2b25ce1681b85c91b5e28075f1c7d9903630c167e5b4aa5d8bb1f6bf5b829b7.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Writes to the Master Boot Record (MBR)
  - Drops file in System32 directory
  PID:1448

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

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Downloads

memory/1448-54-0x0000000000000000-mapping.dmp

Download
memory/1448-55-0x00000000764D1000-0x00000000764D3000-memory.dmp

Filesize
8KB

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