Analysis Report document-1423769819.xls

Overview

General Information

Sample Name: document-1423769819.xls
Analysis ID: 324305
MD5: 1d20db444db998eae5a4970482e0f177
SHA1: dd4e3b177804910b5a42b4377a1913fcca85baad
SHA256: 31d3a487f454a78f2ed78b95c309a6841052e010ea33fcc53f1faba5d22d11f6
Tags: goziSilentBuilderursnifxls

Most interesting Screenshot:

Detection

Hidden Macro 4.0
Score: 80
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Document exploit detected (UrlDownloadToFile)
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Found obfuscated Excel 4.0 Macro
Sigma detected: Microsoft Office Product Spawning Windows Shell
Yara detected hidden Macro 4.0 in Excel
Document contains embedded VBA macros
IP address seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Registers a DLL
Yara signature match

Classification

AV Detection:

barindex
Multi AV Scanner detection for submitted file
Source: document-1423769819.xls Virustotal: Detection: 33% Perma Link

Software Vulnerabilities:

barindex
Document exploit detected (UrlDownloadToFile)
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Section loaded: \KnownDlls\api-ms-win-downlevel-shlwapi-l2-1-0.dll origin: URLDownloadToFileA Jump to behavior
Document exploit detected (process start blacklist hit)
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe Jump to behavior
Potential document exploit detected (performs DNS queries)
Source: global traffic DNS query: name: birdexim.com
Potential document exploit detected (performs HTTP gets)
Source: global traffic TCP traffic: 192.168.2.22:49167 -> 103.21.59.169:443
Potential document exploit detected (unknown TCP traffic)
Source: global traffic TCP traffic: 192.168.2.22:49167 -> 103.21.59.169:443

Networking:

barindex
IP address seen in connection with other malware
Source: Joe Sandbox View IP Address: 103.21.59.169 103.21.59.169
JA3 SSL client fingerprint seen in connection with other malware
Source: Joe Sandbox View JA3 fingerprint: 7dcce5b76c8b17472d024758970a406b
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\T4O403JZ Jump to behavior
Source: unknown DNS traffic detected: queries for: birdexim.com
Source: E0F5C59F9FA661F6F4C50B87FEF3A15A.0.dr String found in binary or memory: http://apps.identrust.com/roots/dstrootcax3.p7c
Source: 77EC63BDA74BD0D0E0426DC8F8008506.0.dr String found in binary or memory: http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
Source: regsvr32.exe, 00000003.00000002.2097778604.0000000001DD0000.00000002.00000001.sdmp String found in binary or memory: http://servername/isapibackend.dll
Source: document-1423769819.xls String found in binary or memory: https://birdexim.com/ds/231120.gif
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 49167
Source: unknown Network traffic detected: HTTP traffic on port 49167 -> 443

System Summary:

barindex
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Source: Screenshot number: 4 Screenshot OCR: Enable Content X I Al " "," jR " A B C D E F G H I J K L M N O P Q R S T : 1 2 3 4 5 6 7
Found Excel 4.0 Macro with suspicious formulas
Source: document-1423769819.xls Initial sample: CALL
Source: document-1423769819.xls Initial sample: CALL
Source: document-1423769819.xls Initial sample: CALL
Source: document-1423769819.xls Initial sample: CALL
Source: document-1423769819.xls Initial sample: EXEC
Found obfuscated Excel 4.0 Macro
Source: document-1423769819.xls Initial sample: High usage of CHAR() function: 18
Document contains embedded VBA macros
Source: document-1423769819.xls OLE indicator, VBA macros: true
Yara signature match
Source: document-1423769819.xls, type: SAMPLE Matched rule: SUSP_Excel4Macro_AutoOpen date = 2020-03-26, author = John Lambert @JohnLaTwC, description = Detects Excel4 macro use with auto open / close, score = 2fb198f6ad33d0f26fb94a1aa159fef7296e0421da68887b8f2548bbd227e58f
Source: classification engine Classification label: mal80.expl.evad.winXLS@3/11@1/1
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\Desktop\61EE0000 Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Temp\CVRD873.tmp Jump to behavior
Source: document-1423769819.xls OLE indicator, Workbook stream: true
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File read: C:\Users\desktop.ini Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\SystemCertificates\CA Jump to behavior
Source: document-1423769819.xls Virustotal: Detection: 33%
Source: unknown Process created: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE 'C:\Program Files\Microsoft Office\Office14\EXCEL.EXE' /automation -Embedding
Source: unknown Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s C:\giogti\mpomqr\fwpxeohi.dll
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s C:\giogti\mpomqr\fwpxeohi.dll Jump to behavior
Source: Window Recorder Window detected: More than 3 window changes detected
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Key opened: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Excel\Resiliency\StartupItems Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File opened: C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4940_none_08e4299fa83d7e3c\MSVCR90.dll Jump to behavior

Data Obfuscation:

barindex
Registers a DLL
Source: unknown Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s C:\giogti\mpomqr\fwpxeohi.dll
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior

HIPS / PFW / Operating System Protection Evasion:

barindex
Yara detected hidden Macro 4.0 in Excel
Source: Yara match File source: document-1423769819.xls, type: SAMPLE
windows-stand
Hide Legend

Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 324305 Sample: document-1423769819.xls Startdate: 29/11/2020 Architecture: WINDOWS Score: 80 14 Multi AV Scanner detection for submitted file 2->14 16 Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros) 2->16 18 Sigma detected: Microsoft Office Product Spawning Windows Shell 2->18 20 3 other signatures 2->20 6 EXCEL.EXE 91 46 2->6         started        process3 dnsIp4 12 birdexim.com 103.21.59.169, 443, 49167 PUBLIC-DOMAIN-REGISTRYUS United Arab Emirates 6->12 22 Document exploit detected (process start blacklist hit) 6->22 24 Document exploit detected (UrlDownloadToFile) 6->24 10 regsvr32.exe 6->10         started        signatures5 process6
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
103.21.59.169
 unknown United Arab Emirates
394695 PUBLIC-DOMAIN-REGISTRYUS false

Contacted Domains

Name IP Active
birdexim.com 103.21.59.169 true