dca7b5cb407c13a9b5cafa6d22bc7cc04cac9d33b0c9eb9588c43ebb672cc39f

Analysis

max time kernel
167s
max time network
195s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2022 22:38

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General

Target

dca7b5cb407c13a9b5cafa6d22bc7cc04cac9d33b0c9eb9588c43ebb672cc39f.dll
Size

148KB
MD5

200f8b15cce07e635b937c913c8e6456
SHA1

8fdb906cb29c153df82fbd4925924c66ea39db62
SHA256

dca7b5cb407c13a9b5cafa6d22bc7cc04cac9d33b0c9eb9588c43ebb672cc39f
SHA512

46bfa8a4e3cf8ed23f80b4807cdbf57c0838679835b5d54db817474de65373eb236c289dcd87073700252bd26ad5bd42736197199ae22ba376a932cb90ed485c
SSDEEP

3072:hri717vQ3XaAfFmLrdIFYmcSggHtldkW15+tjZZqTwyGBhVJ/XjviJvf:xI17vQ3X0rVmcSggHN1ctjjq87hVsv

Score

8^/10

bootkit persistence

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

flow	pid	Process
38	3232	rundll32.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ecf5d260\imagepath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\1EF2.tmp"	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

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
3232	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeLoadDriverPrivilege	3232	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1704 wrote to memory of 3232	1704	rundll32.exe	71
PID 1704 wrote to memory of 3232	1704	rundll32.exe	71
PID 1704 wrote to memory of 3232	1704	rundll32.exe	71

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dca7b5cb407c13a9b5cafa6d22bc7cc04cac9d33b0c9eb9588c43ebb672cc39f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dca7b5cb407c13a9b5cafa6d22bc7cc04cac9d33b0c9eb9588c43ebb672cc39f.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Sets service image path in registry
  - Writes to the Master Boot Record (MBR)
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:3232

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3232-133-0x0000000000C51000-0x0000000000C54000-memory.dmp

Filesize
12KB

Download
memory/3232-134-0x0000000000C80000-0x0000000000CA2000-memory.dmp

Filesize
136KB

Download
memory/3232-135-0x0000000000C50000-0x0000000000C7B000-memory.dmp

Filesize
172KB

Download
memory/3232-136-0x0000000000C80000-0x0000000000CA2000-memory.dmp

Filesize
136KB

Download
memory/3232-137-0x0000000000C80000-0x0000000000CA2000-memory.dmp

Filesize
136KB

Download