asyncrat | b20bdd03ad605edafccbed9cbf281d1fd370116dd07e335fc2f428e9efb2863b

General

Target

svchost.exe
Size

479KB
MD5

4c6b01344809054252095695fe24aa5f
SHA1

d1571b19723ebb0def5a71b7d977ef4c5bdb66ab
SHA256

b20bdd03ad605edafccbed9cbf281d1fd370116dd07e335fc2f428e9efb2863b
SHA512

a26600e8233e90034a3a731246bdc634bc30478ea995c37317ef2e8139200f09446c4b78b500ffec5d7a84045790d0e80d20e4ba58cf28f0e4358f80e1db3af0

Score

10^/10

asyncrat neshta default evasion persistence rat spyware stealer trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

secureyourdataarea1.duckdns.org:56390

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_file
svchost.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	svchost.exe

Modifies system executable filetype association 2 TTPs 1 IoCs
persistence

Modify Registry
T1112

Change Default File Association
T1042

Processes:

svchost.exe

description ioc process

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

Async RAT payload 7 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/2040-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2040-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2040-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2040-70-0x000000000040C74E-mapping.dmp	asyncrat
behavioral1/memory/2040-73-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2040-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2040-81-0x00000000010B0000-0x00000000010D2000-memory.dmp	asyncrat

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

svchost.exesvchost.exe

pid process

1716 svchost.exe
2040 svchost.exe
Loads dropped DLL 3 IoCs

Processes:

svchost.exesvchost.exe

pid process

272 svchost.exe
272 svchost.exe
1716 svchost.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

pid	process
1716	svchost.exe
2040	svchost.exe

pid	process
272	svchost.exe
272	svchost.exe
1716	svchost.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	svchost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

svchost.exe

description pid process target process

PID 1716 set thread context of 2040 1716 svchost.exe svchost.exe

description	pid	process	target process
PID 1716 set thread context of 2040	1716	svchost.exe	svchost.exe

Drops file in Program Files directory 64 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSQRY32.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\SELFCERT.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wab.exe	svchost.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\setup_wm.exe	svchost.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WORDICON.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ImagingDevices.exe	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBEU~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOICONS.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTE.EXE	svchost.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{EF6B0~1\VCREDI~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\ink\mip.exe	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\ODeploy.exe	svchost.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	svchost.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmlaunch.exe	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CLVIEW.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CNFNOT32.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\A3DUTI~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\FLTLDR.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\Oarpmany.exe	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\SOURCE~1\OSE.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wabmig.exe	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\SETUPF~1\{AC76B~1\Setup.exe	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\1033\ONELEV.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\NAMECO~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WINWORD.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOHTMED.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\AcroRd32.exe	svchost.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~4.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\IECONT~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\Eula.exe	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GRAPH.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOSYNC.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	svchost.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~3.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\INFOPATH.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Resource\Icons\SC_REA~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DWTRIG20.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\EQUATION\EQNEDT32.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOXMLED.EXE	svchost.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBE_~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOUC.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\VPREVIEW.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\misc.exe	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ONENOTEM.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\ACCESS~1\wordpad.exe	svchost.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\ADOBEA~1\Versions\1.0\ADOBEA~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\PPTICO.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\WinMail.exe	svchost.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\WMPDMC.exe	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GROOVEMN.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORDB.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ACROBR~1.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DW20.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ACCICONS.EXE	svchost.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORE.EXE	svchost.exe

Drops file in Windows directory 1 IoCs

Processes:

svchost.exe

description ioc process

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

svchost.exe

description ioc process

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

Processes:

powershell.exe

pid process

972 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

svchost.exesvchost.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1716 svchost.exe
Token: SeDebugPrivilege 2040 svchost.exe
Token: SeDebugPrivilege 972 powershell.exe

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

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

pid	process
972	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1716	svchost.exe
Token: SeDebugPrivilege	2040	svchost.exe
Token: SeDebugPrivilege	972	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

svchost.exesvchost.exesvchost.exe

description	pid	process	target process
PID 272 wrote to memory of 1716	272	svchost.exe	svchost.exe
PID 272 wrote to memory of 1716	272	svchost.exe	svchost.exe
PID 272 wrote to memory of 1716	272	svchost.exe	svchost.exe
PID 272 wrote to memory of 1716	272	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 1716 wrote to memory of 2040	1716	svchost.exe	svchost.exe
PID 2040 wrote to memory of 972	2040	svchost.exe	powershell.exe
PID 2040 wrote to memory of 972	2040	svchost.exe	powershell.exe
PID 2040 wrote to memory of 972	2040	svchost.exe	powershell.exe
PID 2040 wrote to memory of 972	2040	svchost.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.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:272

C:\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1716

C:\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe
0
3⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
- Windows security modification
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2040

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Modify Existing Service

1

T1031

Privilege Escalation

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe
Filesize
438KB

MD5
61f89c90f92b2579d100f2af29f8375b

SHA1
94b645443699532b764963a6340dc2001de78146

SHA256
531a2ee7e49f863969f2e353cfc0d62117d4857c9cf3784fa387c72a9911b757

SHA512
fadb57106257333e6e34de9f7a47ca99b1aa628ddb4d973b088a66e3d7d7dda339a680204671bedf96aab68adaeb3797f82c06743dd550eb71d3f850e4214715

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe
Filesize
438KB

MD5
61f89c90f92b2579d100f2af29f8375b

SHA1
94b645443699532b764963a6340dc2001de78146

SHA256
531a2ee7e49f863969f2e353cfc0d62117d4857c9cf3784fa387c72a9911b757

SHA512
fadb57106257333e6e34de9f7a47ca99b1aa628ddb4d973b088a66e3d7d7dda339a680204671bedf96aab68adaeb3797f82c06743dd550eb71d3f850e4214715

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe
Filesize
438KB

MD5
61f89c90f92b2579d100f2af29f8375b

SHA1
94b645443699532b764963a6340dc2001de78146

SHA256
531a2ee7e49f863969f2e353cfc0d62117d4857c9cf3784fa387c72a9911b757

SHA512
fadb57106257333e6e34de9f7a47ca99b1aa628ddb4d973b088a66e3d7d7dda339a680204671bedf96aab68adaeb3797f82c06743dd550eb71d3f850e4214715

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\svchost.exe
Filesize
438KB

MD5
61f89c90f92b2579d100f2af29f8375b

SHA1
94b645443699532b764963a6340dc2001de78146

SHA256
531a2ee7e49f863969f2e353cfc0d62117d4857c9cf3784fa387c72a9911b757

SHA512
fadb57106257333e6e34de9f7a47ca99b1aa628ddb4d973b088a66e3d7d7dda339a680204671bedf96aab68adaeb3797f82c06743dd550eb71d3f850e4214715

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\svchost.exe
Filesize
438KB

MD5
61f89c90f92b2579d100f2af29f8375b

SHA1
94b645443699532b764963a6340dc2001de78146

SHA256
531a2ee7e49f863969f2e353cfc0d62117d4857c9cf3784fa387c72a9911b757

SHA512
fadb57106257333e6e34de9f7a47ca99b1aa628ddb4d973b088a66e3d7d7dda339a680204671bedf96aab68adaeb3797f82c06743dd550eb71d3f850e4214715

Download Submit
memory/272-54-0x0000000075DC1000-0x0000000075DC3000-memory.dmp

Filesize
8KB

Download
memory/972-85-0x000000006E040000-0x000000006E5EB000-memory.dmp

Filesize
5.7MB

Download
memory/972-84-0x000000006E040000-0x000000006E5EB000-memory.dmp

Filesize
5.7MB

Download
memory/972-82-0x0000000000000000-mapping.dmp

Download
memory/1716-56-0x0000000000000000-mapping.dmp

Download
memory/1716-59-0x00000000010D0000-0x0000000001144000-memory.dmp

Filesize
464KB

Download
memory/1716-62-0x0000000000AD0000-0x0000000000B0C000-memory.dmp

Filesize
240KB

Download
memory/2040-65-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2040-70-0x000000000040C74E-mapping.dmp

Download
memory/2040-64-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2040-73-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2040-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2040-77-0x0000000000C90000-0x0000000000D0E000-memory.dmp

Filesize
504KB

Download
memory/2040-78-0x0000000000620000-0x000000000062A000-memory.dmp

Filesize
40KB

Download
memory/2040-79-0x0000000005F50000-0x0000000005FE0000-memory.dmp

Filesize
576KB

Download
memory/2040-80-0x0000000005450000-0x00000000054B0000-memory.dmp

Filesize
384KB

Download
memory/2040-81-0x00000000010B0000-0x00000000010D2000-memory.dmp

Filesize
136KB

Download
memory/2040-67-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2040-69-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2040-68-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads