Windows Analysis Report tender-1235416393.xlsm

Overview

General Information

Sample Name: tender-1235416393.xlsm
Analysis ID: 438525
MD5: 7b3bc7d505fcb3b4c0b30aeb3ee9d0a1
SHA1: aea1e832eed27f02e48248cee5334bc1d20f1263
SHA256: bfe0e882d0ca0fb04757d96181db67c3c5b67e636ac1e92b2d6f6b63e35f0097
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Multi AV Scanner detection for domain / URL
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 abnormal large hidden Excel 4.0 Macro sheet
Sigma detected: Microsoft Office Product Spawning Windows Shell
Yara detected MalDoc1
Excel documents contains an embedded macro which executes code when the document is opened
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
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 detected Xls With Macro 4.0

Classification

AV Detection:

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Multi AV Scanner detection for domain / URL
Source: corazonarquitectura.com Virustotal: Detection: 6% Perma Link
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
Source: unknown HTTPS traffic detected: 192.185.88.195:443 -> 192.168.2.22:49165 version: TLS 1.2
Source: unknown HTTPS traffic detected: 192.185.112.212:443 -> 192.168.2.22:49168 version: TLS 1.2

Software Vulnerabilities:

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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
Potential document exploit detected (performs DNS queries)
Source: global traffic DNS query: name: corazonarquitectura.com
Potential document exploit detected (performs HTTP gets)
Source: global traffic TCP traffic: 192.168.2.22:49165 -> 192.185.88.195:443
Potential document exploit detected (unknown TCP traffic)
Source: global traffic TCP traffic: 192.168.2.22:49165 -> 192.185.88.195:443
Source: excel.exe Memory has grown: Private usage: 4MB later: 127MB

Networking:

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Yara detected MalDoc1
Source: Yara match File source: sharedStrings.xml, type: SAMPLE
IP address seen in connection with other malware
Source: Joe Sandbox View IP Address: 192.185.112.212 192.185.112.212
Source: Joe Sandbox View IP Address: 192.185.88.195 192.185.88.195
Internet Provider seen in connection with other malware
Source: Joe Sandbox View ASN Name: UNIFIEDLAYER-AS-1US UNIFIEDLAYER-AS-1US
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.MSO\375F21A2.png Jump to behavior
Source: unknown DNS traffic detected: queries for: corazonarquitectura.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, 00000003.00000002.2102379562.0000000001C70000.00000002.00000001.sdmp, regsvr32.exe, 00000004.00000002.2103380255.0000000001DF0000.00000002.00000001.sdmp String found in binary or memory: http://servername/isapibackend.dll
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 49168
Source: unknown Network traffic detected: HTTP traffic on port 49165 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 49165
Source: unknown Network traffic detected: HTTP traffic on port 49168 -> 443
Source: unknown HTTPS traffic detected: 192.185.88.195:443 -> 192.168.2.22:49165 version: TLS 1.2
Source: unknown HTTPS traffic detected: 192.185.112.212:443 -> 192.168.2.22:49168 version: TLS 1.2

System Summary:

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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 14 15 D q 16 17 I 18 I WHY I CANNOT OPEN THIS DOCUMENT? 19 ' I 20 I 21 I W Y
Source: Document image extraction number: 10 Screenshot OCR: Enable Content
Source: Document image extraction number: 14 Screenshot OCR: Enable Content WHY I CANNOT OPEN THIS DOCUMENT? w You are using IDS or Android, please use Desktop
Found Excel 4.0 Macro with suspicious formulas
Source: tender-1235416393.xlsm Initial sample: EXEC
Found abnormal large hidden Excel 4.0 Macro sheet
Source: tender-1235416393.xlsm Initial sample: Sheet size: 22132
Excel documents contains an embedded macro which executes code when the document is opened
Source: workbook.xml Binary string: <workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x15 xr xr6 xr10 xr2" xmlns:x15="http://schemas.microsoft.com/office/spreadsheetml/2010/11/main" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xmlns:xr10="http://schemas.microsoft.com/office/spreadsheetml/2016/revision10" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2"><fileVersion appName="xl" lastEdited="7" lowestEdited="6" rupBuild="21029"/><workbookPr/><mc:AlternateContent xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"><mc:Choice Requires="x15"><x15ac:absPath url="C:\Users\Grog\Desktop\" xmlns:x15ac="http://schemas.microsoft.com/office/spreadsheetml/2010/11/ac"/></mc:Choice></mc:AlternateContent><xr:revisionPtr revIDLastSave="0" documentId="13_ncr:1_{90C42D4F-E191-414D-8EFF-FFA408257996}" xr6:coauthVersionLast="40" xr6:coauthVersionMax="40" xr10:uidLastSave="{00000000-0000-0000-0000-000000000000}"/><bookViews><workbookView xWindow="5805" yWindow="2250" windowWidth="13980" windowHeight="4035" firstSheet="1" activeTab="1" xr2:uid="{00000000-000D-0000-FFFF-FFFF00000000}"/></bookViews><sheets><sheet name="Sheet3" sheetId="8" state="hidden" r:id="rId1"/><sheet name="Sheet1" sheetId="10" r:id="rId2"/><sheet name="Sheet2" sheetId="4" r:id="rId3"/></sheets><definedNames><definedName name="_xlnm.Auto_Open">Sheet2!$AO$112</definedName></definedNames><calcPr calcId="145621"/><extLst><ext uri="{140A7094-0E35-4892-8432-C4D2E57EDEB5}" xmlns:x15="http://schemas.microsoft.com/office/spreadsheetml/2010/11/main"><x15:workbookPr chartTrackingRefBase="1"/></ext></extLst></workbook>
Source: classification engine Classification label: mal80.troj.expl.evad.winXLSM@5/18@2/2
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\Desktop\~$tender-1235416393.xlsm Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Temp\CVRD9F9.tmp Jump to behavior
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: unknown Process created: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE 'C:\Program Files\Microsoft Office\Office14\EXCEL.EXE' /automation -Embedding
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s ..\erty1.dll
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s ..\erty2.dll
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s ..\erty1.dll Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s ..\erty2.dll Jump to behavior
Source: Window Recorder Window detected: More than 3 window changes detected
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/media/image1.png
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/media/image2.png
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/media/image3.png
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/media/image4.png
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/media/image5.png
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/media/image6.png
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/worksheets/_rels/sheet2.xml.rels
Source: tender-1235416393.xlsm Initial sample: OLE zip file path = xl/printerSettings/printerSettings2.bin
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:

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Registers a DLL
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\regsvr32.exe regsvr32 -s ..\erty1.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

HIPS / PFW / Operating System Protection Evasion:

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Yara detected Xls With Macro 4.0
Source: Yara match File source: app.xml, type: SAMPLE
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs