MALICIOUS — b1945c4ad1f3b04e7689262e5bac23a40437a1a380dfbb3f702a2ca2acbeb710

MALICIOUS — b1945c4ad1f3b04e7689262e5bac23a40437a1a380dfbb3f702a2ca2acbeb710 is a office-ooxml sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Docusign112101 family. 5 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.

Identification

• SHA-256: b1945c4ad1f3b04e7689262e5bac23a40437a1a380dfbb3f702a2ca2acbeb710
• SHA-1: 90bead3f5211e7f990e3204d0010dd9abd9dfb2a
• MD5: fe6759c9f081417f23dcf2700832102c
• ssdeep: 1536:AjXB5SOqcuTUdehXyvl0f4CZpUcab2GFVbgPuDF7exsylBviKsUOT+5gJ:AOc6EehCfCZpUHKGXbBKsiiD
• TLSH: T1273BF0280BEF6E02EB71683D76C65D4C0ECCA690E46C1992D62C4088F6D35AFD17512F
• Submitted as: b1945c4ad1f3b04e7689262e5bac23a40437a1a380dfbb3f702a2ca2acbeb710
• File type: office-ooxml · Size: 103725 bytes
• Verdict: malicious (99/100) · Family: Docusign112101

Detections (5 of 55 engines)

• MalwareAnalyser heuristics (entropy/packer): high-entropy-blob
• ClamAV (daily): Xls.Downloader.Docusign112101-9908076-0
• oletools (Office/OLE maldoc): oletools:suspicious-macro
• Microsoft Defender: TrojanDownloader:O97M/Qakbot
• Kaspersky (KVRT): HEUR:Trojan.Script.Generic

MITRE ATT&CK

• T1105

Why this verdict

The malicious score of 99/100 is the fusion of 9 weighted signals:

• ClamAV (daily) flagged Xls.Downloader.Docusign112101-9908076-0 (rule Xls.Downloader.Docusign112101-9908076-0) - engine signal, weight 0.90, confidence 0.95
• Microsoft Defender flagged TrojanDownloader:O97M/Qakbot (rule TrojanDownloader:O97M/Qakbot) - engine signal, weight 0.55, confidence 0.85
• Kaspersky (KVRT) flagged HEUR:Trojan.Script.Generic (rule HEUR:Trojan.Script.Generic) - engine signal, weight 0.55, confidence 0.85
• Document contains macros/active content: xlm-macro - static signal, weight 0.35, confidence 0.75
• Obfuscated javascript script: defense-evasion (rule script-deobfuscation) - static signal, weight 0.35, confidence 0.75
• oletools (Office/OLE maldoc) flagged oletools:suspicious-macro (rule oletools:suspicious-macro) - engine signal, weight 0.35, confidence 0.70
• MalwareAnalyser heuristics (entropy/packer) flagged high-entropy-blob (rule high-entropy-blob) - engine signal, weight 0.35, confidence 0.70
• Packing/obfuscation: high-entropy-blob - static signal, weight 0.25, confidence 0.55
• Contacted 9 external host(s) at runtime - network signal, weight 0.12, confidence 0.55

Dynamic analysis (windows)

1175 behavior events · 0 ATT&CK techniques · 21 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• ntp.ubuntu.com
• 250.255.255.239.in-addr.arpa
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl
• 23.40.52.209
• 23.11.37.157
• 40.126.14.160
• 23.33.238.135
• 52.110.12.52 AU · Sydney · AS8075 Microsoft Corporation
• 4.230.171.124 KR · Seoul · AS8075 Microsoft Corporation
• 23.33.238.171
• 85.210.196.11 GB · London · AS8075 Microsoft Limited
• 23.33.238.103
• 52.230.60.54 SG · Singapore · AS8075 Microsoft Corporation
• 20.165.94.54 US · San Antonio · AS8075 Microsoft Corporation

Dropped files

• root_.cache_dconf_user - 96a296d224f285c67bee93c30f8a309157f0daa35dc5b87e410b78630a09cfc7
• root_.cache_mesa_shader_cache_index - 6d0552c4e71fe85e6cdc7e7745882ea91b382fbc56448f2e9e1c2d77dcf67d81
• root_.config_libreoffice_4_.lock - b245b2be9fa2f0c47a54283a651b1d6b7f3f2cab7557671633b189d9d452125d
• root_.config_libreoffice_4_user_GraphicsRenderTests.log - ca66014b962c5f87639d09e17a2dc07c7d1657c2f71a392b1d9bb67cd3a511d9
• root_.config_libreoffice_4_user_autotext_mytexts.bau - 951c8adf2ef8d3edeadb03b0c4374a2d75cf5fed945eeff259d33aa2e77acf7f
• root_.config_libreoffice_4_user_basic_Standard_Module1.xba - b434faf21386064e2e81af758f307ae8bea72c0cb6c8510d55b1bc1bb38f8612
• root_.config_libreoffice_4_user_basic_Standard_dialog.xlb - 85c83411f1285a0d0d9b511a7ea7dd06d5ac9b97f90d286adaca084212e3fe80
• root_.config_libreoffice_4_user_basic_Standard_script.xlb - 80cb10b100053f6e0b26bb009a2b8ccbdedb761901680500a4736f7afbf1f959
• root_.config_libreoffice_4_user_basic_dialog.xlc - 5b72c4cc5130eccab44cbfb91270befaeaf8ee7ab97cf205ee2abb582fa4a9e5
• root_.config_libreoffice_4_user_config_autotbl.fmt - 713229151490c66f043cb4865147c97458b4f33e4eb5f2bb4133c58cbe77041e
• root_.config_libreoffice_4_user_database_biblio.odb - c3dd4e9008be33cdede3abf822e9b748a201704adf95aad92ab894dd98b3fe85
• root_.config_libreoffice_4_user_database_biblio_biblio.dbf - aefc2bb614c2e307870405e0fd72f4a22cf794c396a73ce0551f18a478e80ed2
• root_.config_libreoffice_4_user_database_biblio_biblio.dbt - 3ab142231d8075fdd02c95a691ddce590e0f81450744cb87ca610fd06d75cac1
• root_.config_libreoffice_4_user_extensions_buildid - 4e80829cd1c13534fecb420763830c6a6fe6d9a8a463cefc817071e313bdc7bc
• root_.config_libreoffice_4_user_extensions_bundled_lastsynchronized - 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

Embedded URLs

• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Embedded IP addresses

• 85.210.196.11
• 40.84.97.4
• 4.247.188.224
• 52.110.12.52
• 4.230.171.124
• 52.230.60.54
• 20.165.94.54
• 135.232.92.137
• 135.233.45.221

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report