asyncrat | ff67c3ee76846717bba68faa474601c8ea1330ce1a6a868ef2e83326dd86b73e

General

Target

1f238ad06ac68a23e2397f648dcf7d50N.exe
Size

267KB
MD5

1f238ad06ac68a23e2397f648dcf7d50
SHA1

9fcf736f4227c9e51d1b0baf948847675b3b058f
SHA256

ff67c3ee76846717bba68faa474601c8ea1330ce1a6a868ef2e83326dd86b73e
SHA512

0a1d3439a728f3f4bf9838876cd4e78cda9a5143577687f164d6951f46224e7611be76ac1be70f05fcd250199566e932d88ab4766c8563c46a20f2ef2cfec343
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/sH:WFzDqa86hV6uRRqX1evPlwAEH

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

Contains code to disable Windows Defender 5 IoCs

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

resource	yara_rule
behavioral1/memory/2156-37-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2156-36-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2156-35-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2156-32-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2156-30-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Executes dropped EXE 1 IoCs

pid	Process
2720	HiPatchService.exe

Loads dropped DLL 1 IoCs

pid	Process
2028	1f238ad06ac68a23e2397f648dcf7d50N.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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	1f238ad06ac68a23e2397f648dcf7d50N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2720 set thread context of 2156	2720	HiPatchService.exe	33

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 4 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	1f238ad06ac68a23e2397f648dcf7d50N.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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe
2156	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2720	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	30
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2028 wrote to memory of 2832	2028	1f238ad06ac68a23e2397f648dcf7d50N.exe	31
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33
PID 2720 wrote to memory of 2156	2720	HiPatchService.exe	33

C:\Users\Admin\AppData\Local\Temp\1f238ad06ac68a23e2397f648dcf7d50N.exe
"C:\Users\Admin\AppData\Local\Temp\1f238ad06ac68a23e2397f648dcf7d50N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2028
- 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:2720
- - 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
    - Suspicious behavior: EnumeratesProcesses
    PID:2156
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2832

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1036

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

System Information Discovery

1

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
250de7382898a2eb8973c84c21b105ee

SHA1
9a5be81938597ff2f1704217a05568094ffb4dd2

SHA256
41f282b92f0de29f9e6d91fa4916df7c4c858f1e7ca56f8747e867c075470723

SHA512
073e9a56f8eca781b5af7c135bbbb7f9b53575d3e9435ece9552a721ec7264b4f4a8e6112e3610db229cc5ee0344a5d7eedf32b80fe77c71f0d8fd0f884320f8

Download Submit
memory/2028-25-0x0000000074D70000-0x000000007545E000-memory.dmp

Filesize
6.9MB

Download
memory/2028-1-0x0000000000BC0000-0x0000000000C06000-memory.dmp

Filesize
280KB

Download
memory/2028-2-0x0000000000700000-0x000000000070A000-memory.dmp

Filesize
40KB

Download
memory/2028-3-0x0000000074D70000-0x000000007545E000-memory.dmp

Filesize
6.9MB

Download
memory/2028-21-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

Filesize
4KB

Download
memory/2028-0-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

Filesize
4KB

Download
memory/2156-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2156-26-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2156-37-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2156-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2156-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2156-32-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2156-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2156-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2720-23-0x0000000000DB0000-0x0000000000DF6000-memory.dmp

Filesize
280KB

Download
memory/2720-22-0x0000000074D70000-0x000000007545E000-memory.dmp

Filesize
6.9MB

Download
memory/2720-38-0x0000000074D70000-0x000000007545E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads