asyncrat | 9db2883bad55629e11c0c328e06a1da16278997c67217f4182c2a763aa306d41

General

Target

43ee27bab0d8542ef584be11117b6610N.exe
Size

267KB
MD5

43ee27bab0d8542ef584be11117b6610
SHA1

88c79b63dd9c476fe0e727656b4679dc38d63df4
SHA256

9db2883bad55629e11c0c328e06a1da16278997c67217f4182c2a763aa306d41
SHA512

167e02f8c5e97cc9b8b5f0608ae82a69c84b943d066f5a913a91689a9b08009931229b4667a9ee3c412effbf4c7eb8762ff4b6ffb8c882cb7004cf37bd64fe51
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/w:WFzDqa86hV6uRRqX1evPlwAo

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/628-29-0x0000000000400000-0x0000000000430000-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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	43ee27bab0d8542ef584be11117b6610N.exe

Executes dropped EXE 1 IoCs

pid	Process
1172	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-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	43ee27bab0d8542ef584be11117b6610N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1172 set thread context of 628	1172	HiPatchService.exe	101

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	43ee27bab0d8542ef584be11117b6610N.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
5008	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe
628	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 1172	1044	43ee27bab0d8542ef584be11117b6610N.exe	95
PID 1044 wrote to memory of 1172	1044	43ee27bab0d8542ef584be11117b6610N.exe	95
PID 1044 wrote to memory of 1172	1044	43ee27bab0d8542ef584be11117b6610N.exe	95
PID 1044 wrote to memory of 1560	1044	43ee27bab0d8542ef584be11117b6610N.exe	96
PID 1044 wrote to memory of 1560	1044	43ee27bab0d8542ef584be11117b6610N.exe	96
PID 1044 wrote to memory of 1560	1044	43ee27bab0d8542ef584be11117b6610N.exe	96
PID 1560 wrote to memory of 5008	1560	cmd.exe	98
PID 1560 wrote to memory of 5008	1560	cmd.exe	98
PID 1560 wrote to memory of 5008	1560	cmd.exe	98
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101
PID 1172 wrote to memory of 628	1172	HiPatchService.exe	101

C:\Users\Admin\AppData\Local\Temp\43ee27bab0d8542ef584be11117b6610N.exe
"C:\Users\Admin\AppData\Local\Temp\43ee27bab0d8542ef584be11117b6610N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1044
- 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:1172
- - 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:628
- 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:1560
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5008

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:3556

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
01762db80df33847688d5382c9fde1d2

SHA1
7e7290ccb7c34f8b3dce630d15e45baa2316066f

SHA256
dc1dcdf0b4d8584a79ba03c221f210e706debedd75506eef9eb76418db7468d0

SHA512
c0bf8fe74cad1ca2ac3eacda5301d573ee567a2f8e9ad8155b4ea20ebf42d533ad1d6aea87261990b01fdf6382bab8702cbeb657ba14707f504b1111092eeeb9

Download Submit
memory/628-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1044-6-0x0000000005030000-0x000000000503A000-memory.dmp

Filesize
40KB

Download
memory/1044-4-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1044-5-0x0000000005040000-0x000000000504A000-memory.dmp

Filesize
40KB

Download
memory/1044-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/1044-10-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/1044-3-0x0000000004F90000-0x0000000005022000-memory.dmp

Filesize
584KB

Download
memory/1044-25-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1044-2-0x0000000005460000-0x0000000005A04000-memory.dmp

Filesize
5.6MB

Download
memory/1044-1-0x0000000000560000-0x00000000005A6000-memory.dmp

Filesize
280KB

Download
memory/1172-26-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1172-28-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1172-31-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads