asyncrat | b1470505ff1ab8e3f78abe63e49b74a63d9bfc2c412091a355749508c405eebd

General

Target

89ef6c63f32f21d045023dc226a15540N.exe
Size

267KB
MD5

89ef6c63f32f21d045023dc226a15540
SHA1

fda06ef5c23e4cf114764c4b825a7c6540d5591e
SHA256

b1470505ff1ab8e3f78abe63e49b74a63d9bfc2c412091a355749508c405eebd
SHA512

a22ebd8d07d7dabe8550cc3f4eab4c47c3400eec0f96db3673b6bbb3abeb477ad2f0e9760d0940c6d0f69e65b849f21d81d66977fdf793b1705156f27f9cff18
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/sa:WFzDqa86hV6uRRqX1evPlwAEa

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/3428-28-0x0000000000400000-0x0000000000430000-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-1-5-21-3881032017-2947584075-2120384563-1000\Control Panel\International\Geo\Nation	89ef6c63f32f21d045023dc226a15540N.exe

Executes dropped EXE 1 IoCs

pid	Process
4292	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-1-5-21-3881032017-2947584075-2120384563-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	89ef6c63f32f21d045023dc226a15540N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4292 set thread context of 3428	4292	HiPatchService.exe	89

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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	89ef6c63f32f21d045023dc226a15540N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4448	timeout.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
4292	HiPatchService.exe
4292	HiPatchService.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe
3428	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4292	HiPatchService.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 4292	3928	89ef6c63f32f21d045023dc226a15540N.exe	84
PID 3928 wrote to memory of 4292	3928	89ef6c63f32f21d045023dc226a15540N.exe	84
PID 3928 wrote to memory of 4292	3928	89ef6c63f32f21d045023dc226a15540N.exe	84
PID 3928 wrote to memory of 3160	3928	89ef6c63f32f21d045023dc226a15540N.exe	85
PID 3928 wrote to memory of 3160	3928	89ef6c63f32f21d045023dc226a15540N.exe	85
PID 3928 wrote to memory of 3160	3928	89ef6c63f32f21d045023dc226a15540N.exe	85
PID 3160 wrote to memory of 4448	3160	cmd.exe	87
PID 3160 wrote to memory of 4448	3160	cmd.exe	87
PID 3160 wrote to memory of 4448	3160	cmd.exe	87
PID 4292 wrote to memory of 2788	4292	HiPatchService.exe	88
PID 4292 wrote to memory of 2788	4292	HiPatchService.exe	88
PID 4292 wrote to memory of 2788	4292	HiPatchService.exe	88
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89
PID 4292 wrote to memory of 3428	4292	HiPatchService.exe	89

C:\Users\Admin\AppData\Local\Temp\89ef6c63f32f21d045023dc226a15540N.exe
"C:\Users\Admin\AppData\Local\Temp\89ef6c63f32f21d045023dc226a15540N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3928
- 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 behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4292
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:2788
- - 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:3428
- 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:3160
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4448

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:928

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
267KB

MD5
b88a1a6c31061a7d3e3b3dc78abffbc6

SHA1
ce96d5ce277a8f553c39e9f498572d42ba58a430

SHA256
539859d554771dd336ca39943820c96336c0c2b9729cafea6c95dab17eaa73e7

SHA512
129337ba2cfa757c336d2d7b20d03a03b12f224ec927347051b16c5c7563eb54f046ccb643077648bceab30abc1714e37e0123768d8cd641c03462872e03652c

Download Submit
memory/3428-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3928-6-0x0000000005850000-0x000000000585A000-memory.dmp

Filesize
40KB

Download
memory/3928-4-0x0000000005860000-0x000000000586A000-memory.dmp

Filesize
40KB

Download
memory/3928-5-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3928-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/3928-3-0x00000000058C0000-0x0000000005952000-memory.dmp

Filesize
584KB

Download
memory/3928-25-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3928-2-0x0000000005E70000-0x0000000006414000-memory.dmp

Filesize
5.6MB

Download
memory/3928-1-0x0000000000E10000-0x0000000000E56000-memory.dmp

Filesize
280KB

Download
memory/4292-24-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/4292-26-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/4292-30-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads