MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4491ecf1801788aece27b7cb76dcd3467dfd223372e1cb0c920073e857055d56. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


TrickBot


Vendor detections: 10


Maldoc score: 7


Intelligence 10 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4491ecf1801788aece27b7cb76dcd3467dfd223372e1cb0c920073e857055d56
SHA3-384 hash: cfcefeaf52ae019ed5c7c20b7e661da1b7faa260ceab2d929730f23d42b465a40f599cf83e4524cf4f22fca677b93b4b
SHA1 hash: 040f1d5da1acbc414289909b00cf21dae531e9dc
MD5 hash: 2e6c3d9ae222b67e874f74f47ae6d322
humanhash: lima-oxygen-sierra-friend
File name:att-1664057138.xls
Download: download sample
Signature TrickBot
Create hunting rule
File size:60'928 bytes
First seen:2021-02-11 14:46:26 UTC
Last seen:2021-02-11 17:11:36 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:rihz0DewjEXWfCDIM/V5xtezEsi8OUM+wfglxZ2YCMcfEou+:rihz0DewjEXWfCDIM/V5xtezEsi8OUMl
TLSH 6E5317AFF7969C4AD845433980A747D96323FC514B6B878B3688FB192FB52804F03697
Reporter abuse_ch
Tags:Rackspace rob55 TrickBot xls


Avatar
abuse_ch
Malspam distributing TrickBot:

HELO: smtp69.iad3a.emailsrvr.com
Sending IP: 173.203.187.69
From: Tonia Kersey <susan.cassidy@gjsentinel.com>
Reply-To: Tonia Kersey <neboall@nebotools.net>
Subject: ACG Order Confirmation 6459343YJ
Attachment: att-1664057138.xls

TrickBot payload URL:
http://writtendeer.com/cosmo/solomon.php

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 7
Application name is Microsoft Excel
Office document is in OLE format
OLE dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
350738 bytesWorkbook
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecAuto_OpenRuns when the Excel Workbook is opened
Hex String4R4dVT345234645654
Hex StringTg5T54673554
Hex StringTeFT54654654
SuspiciousEXECMay run an executable file or a system
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
347
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
att-1664057138.xls
Verdict:
Malicious activity
Analysis date:
2021-02-11 14:47:38 UTC
Tags:
macros loader
Link:
https://app.any.run/tasks/4483045e-1668-4d01-af29-650abe637499

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/116841/
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.DLLREGISTERSERVER.200327.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.DLLREGISTERSERVER.200416.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.HiddenSheetExcel4LureRecognizer.20200915.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.QakbotTheDuck.20200928.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4MagicPalmersArcade.20201207.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4MacroLuresWatchingTheDectives.20210115.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4DragoTrainingMontage.20210204.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XLSLOLBINHammerToFall.20201218.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Creating a file
Creating a process with a hidden window
Launching a process
Sending a custom TCP request
Sending an HTTP GET request
Forced shutdown of a system process
Unauthorized injection to a system process
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Office File
Link:
https://app.docguard.net/4491ecf1801788aece27b7cb76dcd3467dfd223372e1cb0c920073e857055d56/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0 Trickbot
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/605923
Signature
Allocates memory in foreign processes
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Document exploit detected (UrlDownloadToFile)
Drops PE files to the user root directory
Found evasive API chain (trying to detect sleep duration tampering with parallel thread)
Found Excel 4.0 Macro with suspicious formulas
Found malware configuration
Hijacks the control flow in another process
Machine Learning detection for dropped file
May check the online IP address of the machine
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office process drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious Svchost Process
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected hidden Macro 4.0 in Excel
Yara detected Trickbot
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 351998 Sample: att-1664057138.xls Startdate: 11/02/2021 Architecture: WINDOWS Score: 100 43 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->43 45 Found malware configuration 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 12 other signatures 2->49 9 EXCEL.EXE 83 41 2->9         started        14 taskeng.exe 1 2->14         started        process3 dnsIp4 41 writtendeer.com 173.13.2.174, 49165, 80 COMCAST-7922US United States 9->41 31 C:\Users\user\Kint.reto, PE32 9->31 dropped 33 C:\Users\user\AppData\Local\...\8[1].iosapp, PE32 9->33 dropped 63 Document exploit detected (process start blacklist hit) 9->63 65 Document exploit detected (UrlDownloadToFile) 9->65 16 rundll32.exe 9->16         started        18 rundll32.exe 14->18         started        file5 signatures6 process7 process8 20 rundll32.exe 16->20         started        signatures9 51 Writes to foreign memory regions 20->51 53 Allocates memory in foreign processes 20->53 23 wermgr.exe 4 2 20->23         started        27 wermgr.exe 20->27         started        process10 dnsIp11 35 5.202.150.151, 447 DIDEHABNNETIR Iran (ISLAMIC Republic Of) 23->35 37 190.151.130.12, 447 CorporaciondeInternetSociedadAnonimaGT Guatemala 23->37 39 8 other IPs or domains 23->39 55 Hijacks the control flow in another process 23->55 57 Writes to foreign memory regions 23->57 29 svchost.exe 23->29         started        59 Tries to detect virtualization through RDTSC time measurements 27->59 61 Found evasive API chain (trying to detect sleep duration tampering with parallel thread) 27->61 signatures12 process13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4491ecf1801788aece27b7cb76dcd3467dfd223372e1cb0c920073e857055d56/
Threat name:
Document-Word.Trojan.TrickBot
Create hunting rule
Status:
Malicious
First seen:
2021-02-11 15:20:04 UTC
AV detection:
13 of 29 (44.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=isi6z4mac6ek5trhw7fxnxgtiz672irtolq4wdesabz6qvyflvla._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
macro xlm
Link:
https://tria.ge/reports/210211-78myefdvvs/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Process spawned unexpected child process
Malware Config
Dropper Extraction:
http://writtendeer.com/cosmo/solomon.php
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Dropper
Score:
0.80
Link:
https://yomi.yoroi.company/submissions/4491ecf1801788aece27b7cb76dcd3467dfd223372e1cb0c920073e857055d56

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:Excel_Hidden_Macro_Sheet
Create hunting rule
Rule name:INDICATOR_DOC_PhishingPatterns
Create hunting rule
Author:ditekSHen
Description:Detects OLE, RTF, PDF and OOXML (decompressed) documents with common phishing strings
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:SUSP_EnableContent_String_Gen
Create hunting rule
Author:Florian Roth
Description:Detects suspicious string that asks to enable active content in Office Doc
Reference:Internal Research
Rule name:SUSP_Excel4Macro_AutoOpen
Create hunting rule
Author:John Lambert @JohnLaTwC
Description:Detects Excel4 macro use with auto open / close
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

TrickBot

Excel file xls 4491ecf1801788aece27b7cb76dcd3467dfd223372e1cb0c920073e857055d56

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1001097/
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/116841/

Comments