neshta | 4d8e5e85b3d49509eab8e7ffebad940147ed950fcddab60e8a13409dfc2b8fc5

General

Target

Petya.exe
Size

266KB
MD5

505e38e344f45ea9ff9c9b560d851c1e
SHA1

c5e934de62fbbad105eef0ec1b533ca00aba05b0
SHA256

4d8e5e85b3d49509eab8e7ffebad940147ed950fcddab60e8a13409dfc2b8fc5
SHA512

6dcc186c7e71fbd104eb0c29777525e59c43aaa6a6e6a439ae2805e1f8d1589c200ce7b5cb622519b9ad8f4480615e8e980132b617e944c3017462a411898689

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:

Petya.exe

description ioc process

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

Petya.exe

pid process

1668 Petya.exe
Loads dropped DLL 2 IoCs

Processes:

Petya.exe

pid process

1852 Petya.exe
1852 Petya.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:

Petya.exe

description ioc process

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

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

pid	process
1668	Petya.exe

pid	process
1852	Petya.exe
1852	Petya.exe

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

Drops file in Program Files directory 64 IoCs

Processes:

Petya.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\WINDOW~1\wabmig.exe	Petya.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\SETUPF~1\{AC76B~1\Setup.exe	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	Petya.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\ACCESS~1\wordpad.exe	Petya.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBEU~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DWTRIG20.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\FLTLDR.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\Setup.exe	Petya.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ImagingDevices.exe	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\ink\mip.exe	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\TextConv\WksConv\Wkconv.exe	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WINWORD.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\XLICONS.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORDB.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\NAMECO~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ACROBR~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Resource\Icons\SC_REA~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBE_~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~2.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GO664E~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CNFNOT32.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ADOBEC~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\Eula.exe	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~3.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOSYNC.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\PPTICO.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wab.exe	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\A3DUTI~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\ADOBEA~1\Versions\1.0\ADOBEA~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CLVIEW.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\IECONT~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTE.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\WinMail.exe	Petya.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOXMLED.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~4.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ACCICONS.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\misc.exe	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\VPREVIEW.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\WMPDMC.exe	Petya.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\1033\ONELEV.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GROOVEMN.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\OIS.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\POWERPNT.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\AcroRd32.exe	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\ODeploy.exe	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOUC.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	Petya.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOHTMED.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	Petya.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE	Petya.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DW20.EXE	Petya.exe

Drops file in Windows directory 1 IoCs

Processes:

Petya.exe

description ioc process

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

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

Petya.exe

description ioc process

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

Processes:

Petya.exe

description pid process

Token: SeShutdownPrivilege 1668 Petya.exe

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

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

description	pid	process
Token: SeShutdownPrivilege	1668	Petya.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

Petya.exe

description	pid	process	target process
PID 1852 wrote to memory of 1668	1852	Petya.exe	Petya.exe
PID 1852 wrote to memory of 1668	1852	Petya.exe	Petya.exe
PID 1852 wrote to memory of 1668	1852	Petya.exe	Petya.exe
PID 1852 wrote to memory of 1668	1852	Petya.exe	Petya.exe

C:\Users\Admin\AppData\Local\Temp\Petya.exe
"C:\Users\Admin\AppData\Local\Temp\Petya.exe"
1⤵
- Modifies system executable filetype association
- Loads dropped DLL
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1852

C:\Users\Admin\AppData\Local\Temp\3582-490\Petya.exe
"C:\Users\Admin\AppData\Local\Temp\3582-490\Petya.exe"
2⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Suspicious use of AdjustPrivilegeToken
PID:1668

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Bootkit

1

T1067

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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\3582-490\Petya.exe
Filesize
225KB

MD5
af2379cc4d607a45ac44d62135fb7015

SHA1
39b6d40906c7f7f080e6befa93324dddadcbd9fa

SHA256
26b4699a7b9eeb16e76305d843d4ab05e94d43f3201436927e13b3ebafa90739

SHA512
69899c47d0b15f92980f79517384e83373242e045ca696c6e8f930ff6454219bf609e0d84c2f91d25dfd5ef3c28c9e099c4a3a918206e957be806a1c2e0d3e99

Download Submit
\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
Filesize
252KB

MD5
9e2b9928c89a9d0da1d3e8f4bd96afa7

SHA1
ec66cda99f44b62470c6930e5afda061579cde35

SHA256
8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

SHA512
2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\Petya.exe
Filesize
225KB

MD5
af2379cc4d607a45ac44d62135fb7015

SHA1
39b6d40906c7f7f080e6befa93324dddadcbd9fa

SHA256
26b4699a7b9eeb16e76305d843d4ab05e94d43f3201436927e13b3ebafa90739

SHA512
69899c47d0b15f92980f79517384e83373242e045ca696c6e8f930ff6454219bf609e0d84c2f91d25dfd5ef3c28c9e099c4a3a918206e957be806a1c2e0d3e99

Download Submit
memory/1668-56-0x0000000000000000-mapping.dmp

Download
memory/1668-60-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1668-61-0x0000000000230000-0x0000000000242000-memory.dmp

Filesize
72KB

Download
memory/1852-54-0x00000000753B1000-0x00000000753B3000-memory.dmp

Filesize
8KB

Download

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