neshta | 6602f1c5f952685a673f0b6e108ebdc960fe73c0451fc3a3a05f3323c8c23a5d

General

Target

Dekont_20220926983636 pdf.exe
Size

107KB
MD5

26e2091577b401910c90bf4226c5689e
SHA1

c4e6893bfbed5810a5ad3568ed535b03ce7516bf
SHA256

6602f1c5f952685a673f0b6e108ebdc960fe73c0451fc3a3a05f3323c8c23a5d
SHA512

327c946223dc4510d3bff632d654bfb2032f531a022520e961268fde782787b4d802e514b80c79dccfe15ad6486e412b11722d7fbb16c2a145890bcf1e6b4fa5
SSDEEP

192:/c/lrDtxfakO8nUzAS4W8X9oZdMpjBXwjXjfbi76WxLR5d6vUUoRe:/yrDthakO8UkKZdoqjXjfbi76YRN

Score

10^/10

neshta persistence spyware

Malware Config

Signatures

Detect Neshta payload 7 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1068-72-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/1068-73-0x00000000004080E4-mapping.dmp	family_neshta
behavioral1/memory/1068-74-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/1068-76-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/1068-77-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/1068-81-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/1068-82-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

Processes:

InstallUtil.exe

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

Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
Loads dropped DLL 2 IoCs

Processes:

InstallUtil.exe

pid process

1068 InstallUtil.exe
1068 InstallUtil.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Dekont_20220926983636 pdf.exe

description pid process target process

PID 1376 set thread context of 1068 1376 Dekont_20220926983636 pdf.exe InstallUtil.exe

pid	process
1068	InstallUtil.exe
1068	InstallUtil.exe

description	pid	process	target process
PID 1376 set thread context of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe

Drops file in Program Files directory 64 IoCs

Processes:

InstallUtil.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\IECONT~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTE.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmlaunch.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Resource\Icons\SC_REA~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBE_~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GO664E~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\1033\ONELEV.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOUC.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\SELFCERT.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOICONS.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\ODeploy.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\TextConv\WksConv\Wkconv.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\ink\mip.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\INFOPATH.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\NAMECO~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\AcroRd32.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\Eula.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\Setup.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOF5E2~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI4223~1\sidebar.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\LICLUA.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\OIS.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOSYNC.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\ACCESS~1\wordpad.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ADOBEC~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~3.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ACCICONS.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOHTMED.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WORDICON.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpconfig.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmprph.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\A3DUTI~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ImagingDevices.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WINWORD.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\WMPDMC.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBEU~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\PPTICO.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\VPREVIEW.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORE.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DWTRIG20.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\FLTLDR.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\SOURCE~1\OSE.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSQRY32.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ACROBR~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~4.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\BCSSync.exe	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CLVIEW.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\XLICONS.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	InstallUtil.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\SETUPF~1\{AC76B~1\Setup.exe	InstallUtil.exe

Drops file in Windows directory 1 IoCs

Processes:

InstallUtil.exe

description ioc process

File opened for modification C:\Windows\svchost.com InstallUtil.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	InstallUtil.exe

Modifies registry class 1 IoCs

Processes:

InstallUtil.exe

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

368 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Dekont_20220926983636 pdf.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1376 Dekont_20220926983636 pdf.exe
Token: SeDebugPrivilege 368 powershell.exe

pid	process
368	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1376	Dekont_20220926983636 pdf.exe
Token: SeDebugPrivilege	368	powershell.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

Dekont_20220926983636 pdf.exe

description	pid	process	target process
PID 1376 wrote to memory of 368	1376	Dekont_20220926983636 pdf.exe	powershell.exe
PID 1376 wrote to memory of 368	1376	Dekont_20220926983636 pdf.exe	powershell.exe
PID 1376 wrote to memory of 368	1376	Dekont_20220926983636 pdf.exe	powershell.exe
PID 1376 wrote to memory of 368	1376	Dekont_20220926983636 pdf.exe	powershell.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe
PID 1376 wrote to memory of 1068	1376	Dekont_20220926983636 pdf.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\Dekont_20220926983636 pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Dekont_20220926983636 pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:368
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Modifies system executable filetype association
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Modifies registry class
  PID:1068

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\MICROS~1\Windows\STARTM~1\Programs\aaaaaaa\MBMBMB~1.EXE

Filesize
107KB

MD5
26e2091577b401910c90bf4226c5689e

SHA1
c4e6893bfbed5810a5ad3568ed535b03ce7516bf

SHA256
6602f1c5f952685a673f0b6e108ebdc960fe73c0451fc3a3a05f3323c8c23a5d

SHA512
327c946223dc4510d3bff632d654bfb2032f531a022520e961268fde782787b4d802e514b80c79dccfe15ad6486e412b11722d7fbb16c2a145890bcf1e6b4fa5

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\Roaming\MICROS~1\Windows\STARTM~1\Programs\aaaaaaa\MBMBMB~1.EXE

Filesize
107KB

MD5
26e2091577b401910c90bf4226c5689e

SHA1
c4e6893bfbed5810a5ad3568ed535b03ce7516bf

SHA256
6602f1c5f952685a673f0b6e108ebdc960fe73c0451fc3a3a05f3323c8c23a5d

SHA512
327c946223dc4510d3bff632d654bfb2032f531a022520e961268fde782787b4d802e514b80c79dccfe15ad6486e412b11722d7fbb16c2a145890bcf1e6b4fa5

Download Submit
memory/368-62-0x000000006F2C0000-0x000000006F86B000-memory.dmp

Filesize
5.7MB

Download
memory/368-58-0x0000000000000000-mapping.dmp

Download
memory/368-60-0x000000006F2C0000-0x000000006F86B000-memory.dmp

Filesize
5.7MB

Download
memory/368-61-0x000000006F2C0000-0x000000006F86B000-memory.dmp

Filesize
5.7MB

Download
memory/1068-68-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-70-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-64-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-66-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-67-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-63-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-69-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-81-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-72-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-73-0x00000000004080E4-mapping.dmp

Download
memory/1068-74-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-76-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-77-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1068-82-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1376-54-0x0000000000D90000-0x0000000000DB0000-memory.dmp

Filesize
128KB

Download
memory/1376-55-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/1376-56-0x00000000056B0000-0x0000000005760000-memory.dmp

Filesize
704KB

Download
memory/1376-57-0x0000000000450000-0x00000000004E2000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads