asyncrat | 6cddf9893889ed35ffa4bb276c245a538681cc636bd38468e2cc36a2c0aa6dff

General

Target

73901a494831623fade711debf5bc970N.exe
Size

267KB
MD5

73901a494831623fade711debf5bc970
SHA1

2dfbb0180d5c84aede8a3eab1f50b249a24f7900
SHA256

6cddf9893889ed35ffa4bb276c245a538681cc636bd38468e2cc36a2c0aa6dff
SHA512

42635070b0a77c1959a1ba6c206fef2c51cae3488136699ac69073c2e23c5b7d8fe544e412a5bc4a8118a77f7087adf6923b4dfd1d183736e6ec2547964f5c26
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/X:WFzDqa86hV6uRRqX1evPlwA/

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/4976-29-0x0000000000400000-0x0000000000430000-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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	73901a494831623fade711debf5bc970N.exe

Executes dropped EXE 1 IoCs

pid	Process
696	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-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	73901a494831623fade711debf5bc970N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 696 set thread context of 4976	696	HiPatchService.exe	98

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	cmd.exe
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	73901a494831623fade711debf5bc970N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.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
400	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe
4976	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3504 wrote to memory of 696	3504	73901a494831623fade711debf5bc970N.exe	92
PID 3504 wrote to memory of 696	3504	73901a494831623fade711debf5bc970N.exe	92
PID 3504 wrote to memory of 696	3504	73901a494831623fade711debf5bc970N.exe	92
PID 3504 wrote to memory of 4816	3504	73901a494831623fade711debf5bc970N.exe	93
PID 3504 wrote to memory of 4816	3504	73901a494831623fade711debf5bc970N.exe	93
PID 3504 wrote to memory of 4816	3504	73901a494831623fade711debf5bc970N.exe	93
PID 4816 wrote to memory of 400	4816	cmd.exe	95
PID 4816 wrote to memory of 400	4816	cmd.exe	95
PID 4816 wrote to memory of 400	4816	cmd.exe	95
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98
PID 696 wrote to memory of 4976	696	HiPatchService.exe	98

C:\Users\Admin\AppData\Local\Temp\73901a494831623fade711debf5bc970N.exe
"C:\Users\Admin\AppData\Local\Temp\73901a494831623fade711debf5bc970N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3504
- 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:696
- - 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:4976
- 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:4816
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:400

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1284

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
b53425363d73c4fb293dc86126e3634c

SHA1
1881ada51028c6067486650cff84535800402e9d

SHA256
e56a5bf1051708dee393f04001d825062c9067e55d68c8f7112bdcc825e013e8

SHA512
2c88c4d39d5298b26bf9dbff8270c476b3551f45e2c2203bb5919384f75b8c53c5103e4efe097bf15def8b447b9e703377a2c7ca6b86b0828a8e7947e133e92f

Download Submit
memory/696-31-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/696-28-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/696-26-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3504-6-0x0000000005310000-0x000000000531A000-memory.dmp

Filesize
40KB

Download
memory/3504-0-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/3504-12-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/3504-5-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3504-25-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3504-4-0x0000000005320000-0x000000000532A000-memory.dmp

Filesize
40KB

Download
memory/3504-3-0x0000000005390000-0x0000000005422000-memory.dmp

Filesize
584KB

Download
memory/3504-2-0x00000000058A0000-0x0000000005E44000-memory.dmp

Filesize
5.6MB

Download
memory/3504-1-0x0000000000A10000-0x0000000000A56000-memory.dmp

Filesize
280KB

Download
memory/4976-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads