asyncrat | 7618ba68a3427461f3df54bfcbaf7d23b45827ee59bccf9c6ca7f3f4f6881079

General

Target

19603fe7829efa24905b5926cdc82c60N.exe
Size

266KB
MD5

19603fe7829efa24905b5926cdc82c60
SHA1

d06f14588249f71ba6c2ffc91f6c936080c4d7e4
SHA256

7618ba68a3427461f3df54bfcbaf7d23b45827ee59bccf9c6ca7f3f4f6881079
SHA512

94f3d1e424d7e539e13b4ee12263b3d2a56a9221e9b6b81328585758d4581fcde995c6d7df07f409d8f627ee92c9eda343c5d95999f173fc5d2974d800f12e32
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/e:WFzDqa86hV6uRRqX1evPlwAm

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/4464-28-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	19603fe7829efa24905b5926cdc82c60N.exe

Executes dropped EXE 1 IoCs

pid	Process
3060	HiPatchService.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	19603fe7829efa24905b5926cdc82c60N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3060 set thread context of 4464	3060	HiPatchService.exe	90

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 5 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	19603fe7829efa24905b5926cdc82c60N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1388	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe
4464	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2052 wrote to memory of 3060	2052	19603fe7829efa24905b5926cdc82c60N.exe	86
PID 2052 wrote to memory of 3060	2052	19603fe7829efa24905b5926cdc82c60N.exe	86
PID 2052 wrote to memory of 3060	2052	19603fe7829efa24905b5926cdc82c60N.exe	86
PID 2052 wrote to memory of 3644	2052	19603fe7829efa24905b5926cdc82c60N.exe	87
PID 2052 wrote to memory of 3644	2052	19603fe7829efa24905b5926cdc82c60N.exe	87
PID 2052 wrote to memory of 3644	2052	19603fe7829efa24905b5926cdc82c60N.exe	87
PID 3644 wrote to memory of 1388	3644	cmd.exe	89
PID 3644 wrote to memory of 1388	3644	cmd.exe	89
PID 3644 wrote to memory of 1388	3644	cmd.exe	89
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90
PID 3060 wrote to memory of 4464	3060	HiPatchService.exe	90

C:\Users\Admin\AppData\Local\Temp\19603fe7829efa24905b5926cdc82c60N.exe
"C:\Users\Admin\AppData\Local\Temp\19603fe7829efa24905b5926cdc82c60N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2052
- C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
  "C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:4464
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3644
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1388

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:3920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat

Filesize
213B

MD5
0955cb4b691d44b37f8b6fad48a33b8e

SHA1
9dae759ae014cc124ab6eed7c8035788c124ae4a

SHA256
9092dbb1ca1767d1966b7f79349dd95a802a68248251bf070c0f1d74d5681d71

SHA512
08b868a028c1e8d29ed643416850df16f58d44668f9193b46bd3934965e5617a0a4015fc52815c5456023dbde01023450d295b76d936a936f26b602e764b0235

Download Submit
C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe

Filesize
266KB

MD5
546320413d43b04deb5de20e1ea41a38

SHA1
641c266f08b1783ba2737c44772a9783bc659c69

SHA256
fb3770718c1a9015947316d0bdd31836491035b8b1e2b92f3835ef3187505998

SHA512
034a66ea980179fcb4560267ffddc3031a364866375b17b7050a7b8eb5b9a5e717264154447995861cddc5c53c9b5d2486a69b551797787e815519b7d430a4fe

Download Submit
memory/2052-6-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/2052-3-0x0000000004E70000-0x0000000004F02000-memory.dmp

Filesize
584KB

Download
memory/2052-4-0x0000000004F30000-0x0000000004F3A000-memory.dmp

Filesize
40KB

Download
memory/2052-5-0x0000000004F20000-0x0000000004F2A000-memory.dmp

Filesize
40KB

Download
memory/2052-0-0x000000007464E000-0x000000007464F000-memory.dmp

Filesize
4KB

Download
memory/2052-2-0x0000000005380000-0x0000000005924000-memory.dmp

Filesize
5.6MB

Download
memory/2052-25-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/2052-1-0x0000000000440000-0x0000000000486000-memory.dmp

Filesize
280KB

Download
memory/3060-24-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/3060-27-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/3060-30-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/4464-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads