MALICIOUS — Details-2357.xlsb

MALICIOUS — Details-2357.xlsb is a office-ooxml sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (93/100). 4 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.

Identification

• SHA-256: 3ced99317d9495f9038bf496ac0f2015c9cf080e64e51876bed414a2810ec870
• SHA-1: 6d212093a810c24e2e40571634e0fc5fc6bdec5e
• MD5: c6220abbdef96464c0a5eeb31c794eff
• ssdeep: 1536:1WTPrERj+fnENP2CET+S+agP7nA9u9DE25SKV1TDr:wTT7zT1k7TA+V1/r
• TLSH: T12937F12C7C4698AEDFA19C364C21FDAFA5409498876916810571E5F3B3F1603C6BF039
• Submitted as: Details-2357.xlsb
• File type: office-ooxml · Size: 71200 bytes
• Verdict: malicious (93/100)

Detections (4 of 55 engines)

• MalwareAnalyser heuristics (entropy/packer): high-entropy-blob
• Microsoft Defender: TrojanDownloader:O97M/Dridex!rfn
• Emsisoft (Emergency Kit): Trojan.Agent.FRPA
• Kaspersky (KVRT): HEUR:Trojan.Script.Generic

MITRE ATT&CK

• T1105

Why this verdict

The malicious score of 93/100 is the fusion of 7 weighted signals:

• Microsoft Defender flagged TrojanDownloader:O97M/Dridex!rfn (rule TrojanDownloader:O97M/Dridex!rfn) - engine signal, weight 0.55, confidence 0.85
• Emsisoft (Emergency Kit) flagged Trojan.Agent.FRPA (rule Trojan.Agent.FRPA) - 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
• 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 13 external host(s) at runtime - network signal, weight 0.12, confidence 0.55

Dynamic analysis (windows)

1082 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
• desktop-hsgcbep._dosvc._tcp.local
• 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
• 20.184.175.1 US · San Jose · AS8075 Microsoft Corporation
• 192.168.122.112
• 52.123.252.219 AU · Sydney · AS8075 Microsoft Corporation
• 23.33.238.178
• 52.110.12.21 AU · Sydney · AS8075 Microsoft Corporation
• 20.190.167.19
• 4.230.171.124 KR · Seoul · AS8075 Microsoft Corporation
• 23.33.238.207

Dropped files

• root_.cache_dconf_user - 96a296d224f285c67bee93c30f8a309157f0daa35dc5b87e410b78630a09cfc7
• root_.cache_mesa_shader_cache_index - 6d0552c4e71fe85e6cdc7e7745882ea91b382fbc56448f2e9e1c2d77dcf67d81
• root_.config_libreoffice_4_.lock - caed7380afdf014aca60a6d30983bbe8ceecaa4599b19e1531dccc1b8f34376e
• 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

• 4.150.223.104
• 172.172.255.216
• 20.42.179.204
• 20.42.73.28
• 52.148.114.188
• 20.184.175.1
• 52.123.252.219
• 52.110.12.21
• 4.230.171.124
• 74.178.76.54
• 57.155.104.224
• 4.150.223.102
• 135.234.160.244

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report