neshta | d6aad97edc9eea7eb5b9ce013c8350c48787dbc7753318832ad0be425b2be2ee

General

Target

mbr.exe
Size

88KB
MD5

6341e20beb1eac54d1cd968827480256
SHA1

002bd68aa065be59a27839113a4345ecf9e06190
SHA256

d6aad97edc9eea7eb5b9ce013c8350c48787dbc7753318832ad0be425b2be2ee
SHA512

2c83f1bdb2559888bcee7683bb902c6da8d4c9f1682aa5bc8b0975ee4eb65a53dac7325a00095db297f0ca3ee236046cfaf784fff338f187690f0f04d5e0e53d

Score

10^/10

neshta bootkit persistence spyware stealer

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 1 IoCs
persistence

Modify Registry
T1112

Change Default File Association
T1042

Processes:

mbr.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" mbr.exe
Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
Executes dropped EXE 1 IoCs

Processes:

mbr.exe

pid process

3184 mbr.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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

Processes:

mbr.exe

description ioc process

File opened for modification \??\PhysicalDrive0 mbr.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	mbr.exe

pid	process
3184	mbr.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	mbr.exe

Drops file in Program Files directory 55 IoCs

Processes:

mbr.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\32BITM~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\READER~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROBR~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jucheck.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\WinMail.exe	mbr.exe
File opened for modification	C:\PROGRA~3\Adobe\Setup\{AC76B~1\setup.exe	mbr.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmlaunch.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~2.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jusched.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADelRCP.exe	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jaureg.exe	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOF5E2~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wab.exe	mbr.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\setup_wm.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\FULLTR~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\WOW_HE~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GO664E~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADOBEC~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmprph.exe	mbr.exe
File opened for modification	C:\PROGRA~3\MICROS~1\CLICKT~1\{9AC08~1\INTEGR~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe	mbr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\AdobeARM.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~4.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	mbr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ACCESS~1\wordpad.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Eula.exe	mbr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	mbr.exe
File opened for modification	C:\PROGRA~2\WI8A19~1\ImagingDevices.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\arh.exe	mbr.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpconfig.exe	mbr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ExtExport.exe	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\ADOBEA~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroCEF\RdrCEF.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~3.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	mbr.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\64BITM~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wabmig.exe	mbr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Browser\WCCHRO~1\WCCHRO~1.EXE	mbr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	mbr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\LOGTRA~1.EXE	mbr.exe

Drops file in Windows directory 1 IoCs

Processes:

mbr.exe

description ioc process

File opened for modification C:\Windows\svchost.com mbr.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\svchost.com	mbr.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1"	LogonUI.exe

Modifies registry class 1 IoCs

Processes:

mbr.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" mbr.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LogonUI.exe

pid process

1960 LogonUI.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	mbr.exe

pid	process
1960	LogonUI.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

mbr.exe

description	pid	process	target process
PID 1496 wrote to memory of 3184	1496	mbr.exe	mbr.exe
PID 1496 wrote to memory of 3184	1496	mbr.exe	mbr.exe
PID 1496 wrote to memory of 3184	1496	mbr.exe	mbr.exe

C:\Users\Admin\AppData\Local\Temp\mbr.exe
"C:\Users\Admin\AppData\Local\Temp\mbr.exe"
1⤵
- Modifies system executable filetype association
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\3582-490\mbr.exe
  "C:\Users\Admin\AppData\Local\Temp\3582-490\mbr.exe"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  PID:3184

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad5055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

1

T1067

Change Default File Association

1

T1042

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\3582-490\mbr.exe

Filesize
47KB

MD5
8562ed46d745dceb3cc268693ca25c83

SHA1
309067f0c9703084654495a47e67f7a40824700d

SHA256
ea5d21e6598d52b30e9d055bc406c6227bbadb5c493addb27b32fb16a6dcae8c

SHA512
52f23e70f7ea6eab1a50a4008e563d787732f7361dfe10c48f39dae42bce023c90449c9a903733fab13c49b50f8c4fa7d4864ab26c69326aab0149c765fd677b

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\mbr.exe

Filesize
47KB

MD5
8562ed46d745dceb3cc268693ca25c83

SHA1
309067f0c9703084654495a47e67f7a40824700d

SHA256
ea5d21e6598d52b30e9d055bc406c6227bbadb5c493addb27b32fb16a6dcae8c

SHA512
52f23e70f7ea6eab1a50a4008e563d787732f7361dfe10c48f39dae42bce023c90449c9a903733fab13c49b50f8c4fa7d4864ab26c69326aab0149c765fd677b

Download Submit
memory/3184-119-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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