neshta | b406c1acec618c85ce1990fb931342aff9c5173b862b4a828b61cb89c24aa0c3

General

Target

Curd.exe
Size

7.5MB
MD5

b536faca77dc94cb96eda5d45bdc4afa
SHA1

01e75c013c5b77597d58cf20365812c01ce73eaa
SHA256

b406c1acec618c85ce1990fb931342aff9c5173b862b4a828b61cb89c24aa0c3
SHA512

d70ca52c1b42ebcf2c59c6abe3b49be91c7915751640a31810af6f2990e0e729de51901a89cf9fa69324cf8e02f84c2dcf049213bfa17179e7811b8ffe8dca47
SSDEEP

98304:nteYgI6OshoKyDvuIYc5AhV+gEc4kZvRLoI0EJfNA3z5UTbDv9JTSPhlVtQo1fO:nIYmOshoKMuIkhVastRL5Di3tK/SPJO

Score

10^/10

neshta discovery persistence spyware stealer upx

Malware Config

Signatures

Detect Neshta payload 2 IoCs

Processes:

resource	yara_rule
C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe	family_neshta
behavioral1/memory/1992-111-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta

Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
Neshta family
neshta
Executes dropped EXE 3 IoCs

Processes:

Curd.exeCurd.exe

pid process

3004 Curd.exe
2732 Curd.exe
1192
Loads dropped DLL 4 IoCs

Processes:

Curd.exeCurd.exeCurd.exe

pid process

1992 Curd.exe
3004 Curd.exe
2732 Curd.exe
1992 Curd.exe
Modifies system executable filetype association 2 TTPs 1 IoCs
persistence

Modify Registry
T1112

Change Default File Association
T1546.001

Processes:

Curd.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" Curd.exe
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

pid	process
3004	Curd.exe
2732	Curd.exe
1192

pid	process
1992	Curd.exe
3004	Curd.exe
2732	Curd.exe
1992	Curd.exe

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

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\_MEI30042\python311.dll	upx
behavioral1/memory/2732-36-0x000007FEF5DA0000-0x000007FEF6389000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

Processes:

Curd.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\Setup.exe	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\misc.exe	Curd.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\WinMail.exe	Curd.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\SOURCE~1\OSE.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\POWERPNT.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\EQUATION\EQNEDT32.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\FLTLDR.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\LICLUA.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\Oarpmany.exe	Curd.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORDB.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTE.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\A3DUTI~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\1033\ONELEV.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTEM.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\PPTICO.EXE	Curd.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOF5E2~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOBD5D~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\INFOPATH.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOUC.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DW20.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOSYNC.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORE.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\NAMECO~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\SELFCERT.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\WMPDMC.exe	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~4.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOHTMED.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WORDICON.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wab.exe	Curd.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wabmig.exe	Curd.exe
File opened for modification	C:\PROGRA~2\WI4223~1\sidebar.exe	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\AcroRd32.exe	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\ADOBEA~1\Versions\1.0\ADOBEA~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~3.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~2.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WINWORD.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ADOBEC~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GRAPH.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GROOVEMN.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpconfig.exe	Curd.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	Curd.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\ODeploy.exe	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\TextConv\WksConv\Wkconv.exe	Curd.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\XLICONS.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\SETUPF~1\{AC76B~1\Setup.exe	Curd.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmprph.exe	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOICONS.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\Eula.exe	Curd.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Resource\Icons\SC_REA~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBE_~1.EXE	Curd.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DWTRIG20.EXE	Curd.exe

Drops file in Windows directory 1 IoCs

Processes:

Curd.exe

description ioc process

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

System Information Discovery
T1082
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
discovery

System Language Discovery
T1614.001

Processes:

Curd.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Curd.exe
Modifies registry class 1 IoCs

Processes:

Curd.exe

description ioc process

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

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

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Curd.exe

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

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

Curd.exeCurd.exe

description	pid	process	target process
PID 1992 wrote to memory of 3004	1992	Curd.exe	Curd.exe
PID 1992 wrote to memory of 3004	1992	Curd.exe	Curd.exe
PID 1992 wrote to memory of 3004	1992	Curd.exe	Curd.exe
PID 1992 wrote to memory of 3004	1992	Curd.exe	Curd.exe
PID 3004 wrote to memory of 2732	3004	Curd.exe	Curd.exe
PID 3004 wrote to memory of 2732	3004	Curd.exe	Curd.exe
PID 3004 wrote to memory of 2732	3004	Curd.exe	Curd.exe

C:\Users\Admin\AppData\Local\Temp\Curd.exe
"C:\Users\Admin\AppData\Local\Temp\Curd.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe
  "C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe
    "C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:2732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe

Filesize
547KB

MD5
cf6c595d3e5e9667667af096762fd9c4

SHA1
9bb44da8d7f6457099cb56e4f7d1026963dce7ce

SHA256
593e60cc30ae0789448547195af77f550387f6648d45847ea244dd0dd7abf03d

SHA512
ff4f789df9e6a6d0fbe12b3250f951fcf11e857906c65e96a30bb46266e7e1180d6103a03db2f3764e0d1346b2de7afba8259ba080057e4a268e45e8654dfa80

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI30042\python311.dll

Filesize
1.6MB

MD5
5f6fd64ec2d7d73ae49c34dd12cedb23

SHA1
c6e0385a868f3153a6e8879527749db52dce4125

SHA256
ff9f102264d1944fbfae2ba70e7a71435f51a3e8c677fd970b621c4c9ea71967

SHA512
c4be2d042c6e4d22e46eacfd550f61b8f55814bfe41d216a4df48382247df70bc63151068513855aa78f9b3d2f10ba6a824312948324c92de6dd0f6af414e8ab

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\Curd.exe

Filesize
7.4MB

MD5
ec1424db2b5c38da968ba2db848149d8

SHA1
f9dae79b64ec8dc049519cb3aab5e84cef4a30b2

SHA256
2b7de15c6cae1857df6089ab71448aa8f062df85943e820b220f483137283cb1

SHA512
670dd5bdce3b029eb8b024f41d72e8b52e6844105c3da4adc1c30c5bfd5cb0afec80cb2a1db3a93770052f871c15746fda92df1b34cb31d564470210e637657d

Download Submit
memory/1992-111-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2732-36-0x000007FEF5DA0000-0x000007FEF6389000-memory.dmp

Filesize
5.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads