asyncrat | bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35

General

Target

bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe
Size

271KB
MD5

5fc2787df146f4ea832f2ca787bc4550
SHA1

e2bb26b86e5701d87457bd908d6c7e2454eb6f86
SHA256

bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35
SHA512

b2601a0964b50d40fd527ccbfdad29f2fdfa84bd65d07a2d91409a3e53bc72724c26b3589a028faefc8c289b83aca058e7a4f0af7c04dee18a21deaf0bf51196
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdU:WFzDqa86hV6uRRqX1evPlwAEdU

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.4.9G

C2

corporation.warzonedns.com:9341

Mutex

480-28105c055659

Attributes

delay
0
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
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/4264-29-0x0000000000400000-0x0000000000430000-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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe

Executes dropped EXE 1 IoCs

pid	Process
3024	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3024 set thread context of 4264	3024	HiPatchService.exe	99

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	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.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
2780	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe
4264	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 3024	4700	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe	88
PID 4700 wrote to memory of 3024	4700	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe	88
PID 4700 wrote to memory of 3024	4700	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe	88
PID 4700 wrote to memory of 4200	4700	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe	89
PID 4700 wrote to memory of 4200	4700	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe	89
PID 4700 wrote to memory of 4200	4700	bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe	89
PID 4200 wrote to memory of 2780	4200	cmd.exe	91
PID 4200 wrote to memory of 2780	4200	cmd.exe	91
PID 4200 wrote to memory of 2780	4200	cmd.exe	91
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99
PID 3024 wrote to memory of 4264	3024	HiPatchService.exe	99

C:\Users\Admin\AppData\Local\Temp\bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe
"C:\Users\Admin\AppData\Local\Temp\bec2caf44369e10717bc1024c82dbb07335141e0cf5e8761b88614323ebc6b35N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4700
- 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:3024
- - 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:4264
- 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:4200
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2780

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:664

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
271KB

MD5
553202cf1fafa22441b7183ab7f6e6d8

SHA1
57851a55724a90957448095ed46c72a6b4d8c3ab

SHA256
3d59d7b9e18f50c623de6129192550372ed9debc811d53d69de1cb09b042b0a2

SHA512
0b5b2559976bf64cafd92392f1bf4ea7a7a3ad277158ad821768e2b284d34b0cd1d18d057f4c80ed4f1f92acf6714580a210c53fa50b347f79859072a40d773c

Download Submit
memory/3024-31-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3024-27-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3024-26-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/4264-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4700-6-0x0000000005140000-0x000000000514A000-memory.dmp

Filesize
40KB

Download
memory/4700-12-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

Filesize
4KB

Download
memory/4700-0-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

Filesize
4KB

Download
memory/4700-25-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/4700-5-0x0000000005150000-0x000000000515A000-memory.dmp

Filesize
40KB

Download
memory/4700-4-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/4700-3-0x0000000005160000-0x00000000051F2000-memory.dmp

Filesize
584KB

Download
memory/4700-2-0x00000000057C0000-0x0000000005D64000-memory.dmp

Filesize
5.6MB

Download
memory/4700-1-0x0000000000710000-0x0000000000756000-memory.dmp

Filesize
280KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads