d2dbebaf7d20189a83c281bbab6cce71b8eb7859c09b8b09b3ebb23740dca1bb

Analysis

max time kernel
141s
max time network
121s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
11-04-2024 03:24

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General

Target

unicallem.dll
Size

1009KB
MD5

21285f2f301be864240aeb2c922ec99e
SHA1

7b87d11fb3c3eba4869e9949cbe7873c8bf4c53b
SHA256

db7f6960f17163aa836c180fc1845fc14d9c49f7584ca63a24192f011589b6b1
SHA512

6a44483379aecca92ca913e06668d987f32684878366a87b0c9da4d8e5f6e710ba0a3690227aa4e7e09195d7012e76c41c457ca29d8ddbb631e16f2a507b8962
SSDEEP

24576:g7mF0WFAB652nVotTX2Lwf3ZAZQ0VHdXn6r6J:3ZlCsL1f+ZQ6P

Score

6^/10

bootkit persistence

Malware Config

Signatures

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

T1542.003

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2640	2304	WerFault.exe	28

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 1708 wrote to memory of 2304	1708	rundll32.exe	28
PID 2304 wrote to memory of 2640	2304	rundll32.exe	29
PID 2304 wrote to memory of 2640	2304	rundll32.exe	29
PID 2304 wrote to memory of 2640	2304	rundll32.exe	29
PID 2304 wrote to memory of 2640	2304	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\unicallem.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\unicallem.dll,#1
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of WriteProcessMemory
  PID:2304
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 312
    3⤵
    - Program crash
    PID:2640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2304-0-0x00000000024A0000-0x000000000283E000-memory.dmp

Filesize
3.6MB

Download
memory/2304-2-0x00000000024A0000-0x000000000283E000-memory.dmp

Filesize
3.6MB

Download
memory/2304-1-0x00000000024A0000-0x000000000283E000-memory.dmp

Filesize
3.6MB

Download
memory/2304-3-0x0000000000210000-0x000000000025B000-memory.dmp

Filesize
300KB

Download
memory/2304-6-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/2304-5-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/2304-8-0x0000000000200000-0x0000000000201000-memory.dmp

Filesize
4KB

Download
memory/2304-9-0x0000000002B80000-0x0000000002B81000-memory.dmp

Filesize
4KB

Download
memory/2304-7-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/2304-4-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/2304-10-0x0000000002B70000-0x0000000002B72000-memory.dmp

Filesize
8KB

Download
memory/2304-11-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/2304-14-0x0000000002BA0000-0x0000000002BA1000-memory.dmp

Filesize
4KB

Download
memory/2304-15-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/2304-12-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2304-13-0x0000000002BB0000-0x0000000002BB1000-memory.dmp

Filesize
4KB

Download
memory/2304-16-0x00000000024A0000-0x000000000283E000-memory.dmp

Filesize
3.6MB

Download
memory/2304-17-0x0000000002BC0000-0x0000000002BC1000-memory.dmp

Filesize
4KB

Download
memory/2304-18-0x00000000024A0000-0x000000000283E000-memory.dmp

Filesize
3.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads