MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 74b115a8b1f4e18d26b092dc965b60ad94dba931591d9913db219823d294904a. 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


Formbook


Vendor detections: 6


Maldoc score: 6


Intelligence 6 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 74b115a8b1f4e18d26b092dc965b60ad94dba931591d9913db219823d294904a
SHA3-384 hash: de7ede82763999febc490eb2d4d98835444e57cfff9a50790a0a87d3b2979257cbccf6f1e17253eb529c9b8053d4955d
SHA1 hash: 242508434986d472b0b83387ec8d5d33888baa29
MD5 hash: 899e5af08f0794f0131adbf03f841045
humanhash: fruit-table-bluebird-texas
File name:5901777.xls
Download: download sample
Signature Formbook
Create hunting rule
File size:208'384 bytes
First seen:2020-11-27 10:11:40 UTC
Last seen:2020-11-27 11:43:42 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:gk3hOdsylKlgryzc4bNhZF+E+W2knu17K4g62FpqDIWPIVirJNl15bdVwHmGRl:61+4v2FpqDAcrJN1bbwGGR
TLSH BB1402E7B2C6BC86EE066F3948C74340655AFD120BD6E70B6761F2280B36BA05D47D1B
Reporter cocaman
Tags:FormBook xls


Avatar
cocaman
Malicious email (T1566.001)
From: ""Purchasing Department" <postmaster@novytwo.xyz>" (likely spoofed)
Received: "from slot0.novytwo.xyz (slot0.novytwo.xyz [185.81.114.120]) "
Date: "Fri, 27 Nov 2020 01:57:30 -0800"
Subject: "New Order"
Attachment: "5901777.xls"

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: 6
Application name is unknown
Office document is in OLE format
Office document contains VBA Macros
OLE dump

MalwareBazaar was able to identify 10 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2228 bytesDocumentSummaryInformation
3176 bytesSummaryInformation
4200639 bytesWorkbook
5478 bytes_VBA_PROJECT_CUR/PROJECT
671 bytes_VBA_PROJECT_CUR/PROJECTwm
7742 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
87 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
9224 bytes_VBA_PROJECT_CUR/VBA/dir
10172 bytes_VBA_PROJECT_CUR/VBA/oldgcaiba
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
SuspiciousCreateMay execute file or a system command through WMI
SuspiciousCreateObjectMay create an OLE object
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Result
Verdict:
MALICIOUS
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Powershell
Possibly Powershell fragment found embedded.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
evad.troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/549161
Signature
Antivirus detection for dropped file
Bypasses PowerShell execution policy
Creates processes via WMI
Drops PE files to the user root directory
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Queues an APC in another process (thread injection)
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: Suspicious Program Location Process Starts
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 323692 Sample: 5901777.xls Startdate: 27/11/2020 Architecture: WINDOWS Score: 100 45 Multi AV Scanner detection for domain / URL 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for dropped file 2->49 51 12 other signatures 2->51 9 powershell.exe 14 21 2->9         started        14 powershell.exe 21 2->14         started        16 EXCEL.EXE 27 22 2->16         started        process3 dnsIp4 43 sparepartiran.com 162.223.88.131, 49743, 49744, 80 COLOUPUS United States 9->43 41 C:\Users\Public\oftmhayq.exe, PE32 9->41 dropped 61 Drops PE files to the user root directory 9->61 63 Powershell drops PE file 9->63 18 oftmhayq.exe 4 9->18         started        21 conhost.exe 9->21         started        23 oftmhayq.exe 1 5 14->23         started        26 conhost.exe 14->26         started        28 splwow64.exe 16->28         started        file5 signatures6 process7 file8 53 Antivirus detection for dropped file 18->53 55 Machine Learning detection for dropped file 18->55 57 Tries to detect virtualization through RDTSC time measurements 18->57 30 oftmhayq.exe 18->30         started        39 C:\Users\user\AppData\Roaming\...\vlc.exe, PE32 23->39 dropped 59 Injects a PE file into a foreign processes 23->59 33 oftmhayq.exe 23->33         started        signatures9 process10 signatures11 65 Modifies the context of a thread in another process (thread injection) 30->65 67 Maps a DLL or memory area into another process 30->67 69 Queues an APC in another process (thread injection) 30->69 35 explorer.exe 33->35 injected process12 process13 37 vlc.exe 35->37         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/74b115a8b1f4e18d26b092dc965b60ad94dba931591d9913db219823d294904a/
Threat name:
Script-Macro.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2020-11-27 10:12:05 UTC
File Type:
Document
Extracted files:
17
AV detection:
15 of 29 (51.72%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=osyrlkfr6tqy2jvqslojmw3avwknxkjrleozse63egmchuuusbfa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/201127-v9trjka4qs/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Office loads VBA resources, possible macro or embedded object present
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/74b115a8b1f4e18d26b092dc965b60ad94dba931591d9913db219823d294904a

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:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:PowerShell_in_Word_Doc
Create hunting rule
Author:Florian Roth
Description:Detects a powershell and bypass keyword in a Word document
Reference:Internal Research - ME
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: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

Formbook

Excel file xls 74b115a8b1f4e18d26b092dc965b60ad94dba931591d9913db219823d294904a

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments