MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dfa3120842683d00fa303ee15ea8ad6ad961ffed57da5fd0ecb1ba892b3895c8. 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: 5


Intelligence 5 IOCs YARA 1 File information Comments
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SHA256 hash: dfa3120842683d00fa303ee15ea8ad6ad961ffed57da5fd0ecb1ba892b3895c8
SHA3-384 hash: 1e1b6a1bc2f0a4ce3d056284139fd3c8c0e6a0b84c16a6956e0d3a1a6e3435c5b30a299463f64af14a4ad2de7ae2c8f3
SHA1 hash: 56f27554d685e3c5d8c68bac946e9bcd1258713b
MD5 hash: f31bcc2095df412a3888eb33b36f78df
humanhash: kilo-ceiling-oscar-cardinal
File name:2012779.xls
Download: download sample
Signature Formbook
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File size:388'608 bytes
First seen:2020-08-31 09:13:54 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:Jk3hOdsylKlgryzc4bNhZF+E+W2knt+AqmFkM9lz2KE8hBdLVoo5z9Nn/FDC5GVD:Y5kMHq/8oo5ztOcVLEP9iYtHligM9fGa
TLSH 068412A4B2D9CA53CA4B2379CCD203D9F622FC62A78387477798F62943323C44A57756
Reporter abuse_ch
Tags:FormBook Hostwinds xls


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: hwsrv-766529.hostwindsdns.com
Sending IP: 104.168.218.25
From: info@jatholding.com
Subject: Confirm Product Availability
Attachment: 2012779.xls

FormBook payload URL:
https://s3.rokket.space/t_oUfbGz.txt

Intelligence

File Origin
# of uploads :
1
# of downloads :
136
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.VBS.Obfus-110.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a custom TCP request by exploiting the app vulnerability
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/455072
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Creates an autostart registry key pointing to binary in C:\Windows
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to HTTP operations
Document contains an embedded VBA with many randomly named variables
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Drops PE files to the user root directory
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
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: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: MS Office Product Spawning Exe in User Dir
Sigma detected: Suspicious Program Location Process Starts
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 279911 Sample: 2012779.xls Startdate: 31/08/2020 Architecture: WINDOWS Score: 100 48 Multi AV Scanner detection for domain / URL 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Multi AV Scanner detection for dropped file 2->52 54 16 other signatures 2->54 9 EXCEL.EXE 26 37 2->9         started        14 pcalua.exe 1 2->14         started        16 pcalua.exe 1 1 2->16         started        process3 dnsIp4 46 s3.rokket.space 46.4.97.19, 443, 49724 HETZNER-ASDE Germany 9->46 42 C:\Users\user\AppData\...\t_oUfbGz[1].txt, PE32 9->42 dropped 44 C:\Users\Public\igfxtsk.exe, PE32 9->44 dropped 68 Document exploit detected (creates forbidden files) 9->68 70 Document exploit detected (process start blacklist hit) 9->70 18 igfxtsk.exe 6 9->18         started        22 mghd.exe 3 14->22         started        file5 signatures6 process7 file8 38 C:\Users\user\mghd.exe, PE32 18->38 dropped 40 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 18->40 dropped 56 Multi AV Scanner detection for dropped file 18->56 58 Machine Learning detection for dropped file 18->58 60 Drops PE files to the user root directory 18->60 24 mghd.exe 2 18->24         started        27 cmd.exe 1 18->27         started        signatures9 process10 signatures11 62 Writes to foreign memory regions 24->62 64 Allocates memory in foreign processes 24->64 66 Injects a PE file into a foreign processes 24->66 29 AddInProcess32.exe 24->29         started        32 reg.exe 1 1 27->32         started        34 conhost.exe 27->34         started        process12 signatures13 72 Maps a DLL or memory area into another process 29->72 74 Tries to detect virtualization through RDTSC time measurements 29->74 36 explorer.exe 29->36 injected 76 Creates an autostart registry key pointing to binary in C:\Windows 32->76 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dfa3120842683d00fa303ee15ea8ad6ad961ffed57da5fd0ecb1ba892b3895c8/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=36rrecccna6qb6rqh3qv5kfnnlmwd77nk7nf7uhmwg5iskzysxea._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/200831-dql3n7awve/
Behaviour
Suspicious Office macro
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/dfa3120842683d00fa303ee15ea8ad6ad961ffed57da5fd0ecb1ba892b3895c8

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:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples

File information

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

Malspam

Formbook

Excel file xls dfa3120842683d00fa303ee15ea8ad6ad961ffed57da5fd0ecb1ba892b3895c8

(this sample)

Formbook

Executable exe 60dac53124b3a9155d09cad5c886eb32ff5a5bea1329b527dcf5eb7cf93a3f74

  
URLhaus
https://urlhaus.abuse.ch/url/447325/
  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 60dac53124b3a9155d09cad5c886eb32ff5a5bea1329b527dcf5eb7cf93a3f74
  
Dropping
MD5 46036887065bed3621ceebe36e3e7719

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