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 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/4868-29-0x0000000000400000-0x0000000000430000-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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	1f238ad06ac68a23e2397f648dcf7d50N.exe

Executes dropped EXE 1 IoCs

pid	Process
2224	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-1-5-21-786284298-625481688-3210388970-1000\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 2224 set thread context of 4868	2224	HiPatchService.exe	102

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	1f238ad06ac68a23e2397f648dcf7d50N.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
2924	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe
4868	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 2224	3928	1f238ad06ac68a23e2397f648dcf7d50N.exe	97
PID 3928 wrote to memory of 2224	3928	1f238ad06ac68a23e2397f648dcf7d50N.exe	97
PID 3928 wrote to memory of 2224	3928	1f238ad06ac68a23e2397f648dcf7d50N.exe	97
PID 3928 wrote to memory of 4764	3928	1f238ad06ac68a23e2397f648dcf7d50N.exe	98
PID 3928 wrote to memory of 4764	3928	1f238ad06ac68a23e2397f648dcf7d50N.exe	98
PID 3928 wrote to memory of 4764	3928	1f238ad06ac68a23e2397f648dcf7d50N.exe	98
PID 4764 wrote to memory of 2924	4764	cmd.exe	100
PID 4764 wrote to memory of 2924	4764	cmd.exe	100
PID 4764 wrote to memory of 2924	4764	cmd.exe	100
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102
PID 2224 wrote to memory of 4868	2224	HiPatchService.exe	102

C:\Users\Admin\AppData\Local\Temp\1f238ad06ac68a23e2397f648dcf7d50N.exe
"C:\Users\Admin\AppData\Local\Temp\1f238ad06ac68a23e2397f648dcf7d50N.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 use of WriteProcessMemory
  PID:2224
- - 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:4868
- 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:4764
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2924

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:892

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

Replay Monitor

Loading Replay Monitor...

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
535bc2518fc5dda36409fba16478de1a

SHA1
b15f0acf1f856f2f3efb49f148354201273d7d64

SHA256
278c9956316d24b688919fbe0012b0d58e45036f43682d496cbc4eb4e455641f

SHA512
c96d09ed31fdacbf4b7e8ff73811845882bd070383312c09f71aa2139f8c7937c9191ae310f81701745821591fb4d1961ed6c5d64d6c057d505e3c5584dce022

Download Submit
memory/2224-31-0x0000000074F80000-0x0000000075730000-memory.dmp

Filesize
7.7MB

Download
memory/2224-28-0x0000000074F80000-0x0000000075730000-memory.dmp

Filesize
7.7MB

Download
memory/2224-26-0x0000000074F80000-0x0000000075730000-memory.dmp

Filesize
7.7MB

Download
memory/3928-3-0x0000000005220000-0x00000000052B2000-memory.dmp

Filesize
584KB

Download
memory/3928-6-0x00000000051F0000-0x00000000051FA000-memory.dmp

Filesize
40KB

Download
memory/3928-10-0x0000000074F8E000-0x0000000074F8F000-memory.dmp

Filesize
4KB

Download
memory/3928-5-0x0000000074F80000-0x0000000075730000-memory.dmp

Filesize
7.7MB

Download
memory/3928-4-0x0000000005200000-0x000000000520A000-memory.dmp

Filesize
40KB

Download
memory/3928-25-0x0000000074F80000-0x0000000075730000-memory.dmp

Filesize
7.7MB

Download
memory/3928-0-0x0000000074F8E000-0x0000000074F8F000-memory.dmp

Filesize
4KB

Download
memory/3928-2-0x0000000005930000-0x0000000005ED4000-memory.dmp

Filesize
5.6MB

Download
memory/3928-1-0x00000000007C0000-0x0000000000806000-memory.dmp

Filesize
280KB

Download
memory/4868-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads