neshta | 56fd163108e6e2a9e2f7cfd15898f61d5b8d435ed839d1e29b70c040998eedcf

General

Target

Dekont_20220926155607 pdf.exe
Size

11KB
MD5

98ec95d07881fe20943c648fc17a4884
SHA1

4caeeacf2e4dcac911f64a20b00388f96e9adc7e
SHA256

56fd163108e6e2a9e2f7cfd15898f61d5b8d435ed839d1e29b70c040998eedcf
SHA512

ac4e2b370b3880cdc6a67f9978c4f82fe3686d9ccb6bfc580a233721d7befc8709ddb056c76d8db369bdf7f2c49f6a0ab65e3e3c75f041ebde18a7761e1f7f48
SSDEEP

192:yMZ3k3osS0Otg03xoVjn9GprrrrrrrrrrrrrrrrrrrreKp:yMZ04s7OSaxoVwprrrrrrrrrrrrrrrrh

Score

10^/10

neshta persistence spyware

Malware Config

Signatures

Detect Neshta payload 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4740-143-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral2/memory/4740-144-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral2/memory/4740-145-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral2/memory/4740-146-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral2/memory/4740-147-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral2/memory/4740-148-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta

Modifies system executable filetype association 2 TTPs 1 IoCs
persistence

Modify Registry
T1112

Change Default File Association
T1042

Processes:

MSBuild.exe

description ioc process

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

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Dekont_20220926155607 pdf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Dekont_20220926155607 pdf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Dekont_20220926155607 pdf.exe

description pid process target process

PID 4828 set thread context of 4740 4828 Dekont_20220926155607 pdf.exe MSBuild.exe

description	pid	process	target process
PID 4828 set thread context of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe

Drops file in Program Files directory 64 IoCs

Processes:

MSBuild.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroCEF\RdrCEF.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jucheck.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOF5E2~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADOBEC~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\arh.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\PWAHEL~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmlaunch.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~3\ACCESS~1\wordpad.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\AdobeARM.exe	MSBuild.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\MSEDGE~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\MicrosoftEdgeUpdate.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmpshare.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\64BITM~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jusched.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\IDENTI~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\msedge.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\FULLTR~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~3\Adobe\Setup\{AC76B~1\setup.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROBR~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe	MSBuild.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~3.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmpconfig.exe	MSBuild.exe
File opened for modification	C:\PROGRA~3\MICROS~1\CLICKT~1\{9AC08~1\INTEGR~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\READER~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\ADOBEA~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\INSTAL~1\setup.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~2.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13165~1.21\MICROS~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13165~1.21\MI391D~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\Download\{F3C4F~1\13165~1.21\MICROS~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\32BITM~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\setup_wm.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jaureg.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GO664E~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13165~1.21\MI9C33~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wabmig.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmprph.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\LOGTRA~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\WOW_HE~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~4.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ExtExport.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13165~1.21\MICROS~3.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Browser\WCCHRO~1\WCCHRO~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Eula.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\COOKIE~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\PWAHEL~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13165~1.21\MICROS~4.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wab.exe	MSBuild.exe
File opened for modification	C:\PROGRA~2\WI8A19~1\ImagingDevices.exe	MSBuild.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~3.EXE	MSBuild.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	MSBuild.exe

Drops file in Windows directory 1 IoCs

Processes:

MSBuild.exe

description ioc process

File opened for modification C:\Windows\svchost.com MSBuild.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:

MSBuild.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" MSBuild.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

3664 powershell.exe
3664 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Dekont_20220926155607 pdf.exepowershell.exe

description pid process

Token: SeDebugPrivilege 4828 Dekont_20220926155607 pdf.exe
Token: SeDebugPrivilege 3664 powershell.exe

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

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

pid	process
3664	powershell.exe
3664	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4828	Dekont_20220926155607 pdf.exe
Token: SeDebugPrivilege	3664	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

Dekont_20220926155607 pdf.exe

description	pid	process	target process
PID 4828 wrote to memory of 3664	4828	Dekont_20220926155607 pdf.exe	powershell.exe
PID 4828 wrote to memory of 3664	4828	Dekont_20220926155607 pdf.exe	powershell.exe
PID 4828 wrote to memory of 3664	4828	Dekont_20220926155607 pdf.exe	powershell.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe
PID 4828 wrote to memory of 4740	4828	Dekont_20220926155607 pdf.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Dekont_20220926155607 pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Dekont_20220926155607 pdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4828
- 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:3664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  - Modifies system executable filetype association
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Modifies registry class
  PID:4740

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3664-140-0x00000000074E0000-0x0000000007B5A000-memory.dmp

Filesize
6.5MB

Download
memory/3664-136-0x0000000004E40000-0x0000000005468000-memory.dmp

Filesize
6.2MB

Download
memory/3664-139-0x0000000005C80000-0x0000000005C9E000-memory.dmp

Filesize
120KB

Download
memory/3664-135-0x00000000026F0000-0x0000000002726000-memory.dmp

Filesize
216KB

Download
memory/3664-141-0x0000000006170000-0x000000000618A000-memory.dmp

Filesize
104KB

Download
memory/3664-137-0x0000000005590000-0x00000000055F6000-memory.dmp

Filesize
408KB

Download
memory/3664-138-0x0000000005670000-0x00000000056D6000-memory.dmp

Filesize
408KB

Download
memory/3664-134-0x0000000000000000-mapping.dmp

Download
memory/4740-142-0x0000000000000000-mapping.dmp

Download
memory/4740-143-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4740-144-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4740-145-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4740-146-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4740-147-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4740-148-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4828-133-0x000000000A050000-0x000000000A072000-memory.dmp

Filesize
136KB

Download
memory/4828-132-0x0000000000850000-0x0000000000858000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads