neshta | fdcb3e322b8dde7c299effd302a4292b1b673a2171514333cb14b3df8db6ad2c

Analysis

max time kernel
249s
max time network
35s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
31/03/2023, 11:12

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General

Target

DecryptNovo.exe
Size

2.8MB
MD5

1c73eefcec088f539914a70d49777dab
SHA1

89dc3ae4777ed534543c31d54151a6938c23f668
SHA256

e6b5ffc38fd7214f723394c2b133339b426f5a8d236b8a073859b1d173c09fd8
SHA512

9eac52d958db3dbbcaef903f965363930b8e1f0281948c033cb8657612ca0d51100b4def21c6786a5aa22bff18d8d253e3024e7a256a089f84d979a92531a265
SSDEEP

49152:1I7+r/51z6SC9SFgiJGL6N1j6oT/petj:1IqrxNk6N1me0

Score

10^/10

neshta persistence spyware stealer

Malware Config

Signatures

Detect Neshta payload 7 IoCs

resource	yara_rule
behavioral1/files/0x000100000001031d-68.dat	family_neshta
behavioral1/memory/856-69-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/856-75-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/856-149-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/856-151-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/856-153-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/856-156-0x0000000000400000-0x000000000041B000-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

Executes dropped EXE 1 IoCs

pid	Process
516	DecryptNovo.exe

Loads dropped DLL 7 IoCs

pid	Process
856	DecryptNovo.exe
856	DecryptNovo.exe
1376	WerFault.exe
1376	WerFault.exe
1376	WerFault.exe
1376	WerFault.exe
856	DecryptNovo.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

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

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\POWERPNT.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOXMLED.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOSYNC.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTE.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\EQUATION\EQNEDT32.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wab.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\1033\ONELEV.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\IECONT~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\misc.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\NAMECO~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\WMPDMC.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBEU~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~3.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ImagingDevices.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORDB.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\OIS.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\setup_wm.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\ACCESS~1\wordpad.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GROOVEMN.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSQRY32.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\PPTICO.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmlaunch.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\FLTLDR.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOF5E2~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GRAPH.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\VPREVIEW.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOICONS.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\Oarpmany.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\ODeploy.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\Eula.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DW20.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ADOBEC~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\ADOBEA~1\Versions\1.0\ADOBEA~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\Setup.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\XLICONS.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\AcroRd32.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\SOURCE~1\OSE.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GO664E~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\A3DUTI~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CLVIEW.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOBD5D~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CNFNOT32.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORE.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ACROBR~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBE_~1.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\TextConv\WksConv\Wkconv.exe	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WINWORD.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOUC.EXE	DecryptNovo.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTEM.EXE	DecryptNovo.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\svchost.com	DecryptNovo.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1376	516	WerFault.exe	28

Modifies registry class 1 IoCs

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

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 516	856	DecryptNovo.exe	28
PID 856 wrote to memory of 516	856	DecryptNovo.exe	28
PID 856 wrote to memory of 516	856	DecryptNovo.exe	28
PID 856 wrote to memory of 516	856	DecryptNovo.exe	28
PID 516 wrote to memory of 1376	516	DecryptNovo.exe	29
PID 516 wrote to memory of 1376	516	DecryptNovo.exe	29
PID 516 wrote to memory of 1376	516	DecryptNovo.exe	29
PID 516 wrote to memory of 1376	516	DecryptNovo.exe	29

C:\Users\Admin\AppData\Local\Temp\DecryptNovo.exe
"C:\Users\Admin\AppData\Local\Temp\DecryptNovo.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:856
- C:\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe
  "C:\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:516
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 516 -s 148
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:1376

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

T1042

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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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\3582-490\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

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

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

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

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

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\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\DecryptNovo.exe

Filesize
2.8MB

MD5
d43813a35e907c9c436e6976964d13a0

SHA1
dbf101d5674dfc040ba86599e7cec87717ed7f40

SHA256
0afaf175f84d2d45f5791c2220ea4708e7669cd173d387a937b634c53a2b765d

SHA512
2f9333faa6a416d1d5a8c910f6d86a289fd4db47e7430d41395b27553c0bb270e75165d69423c14303b84323cb6706209099037fe6178b274bcf306afeadf8bb

Download Submit
memory/516-70-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/856-75-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/856-69-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/856-149-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/856-151-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/856-153-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/856-156-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download