MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4cd5fc82f7d1094ebe188a372dd682d24083ea423f0b49a057cfacc0af849ac4. 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: 11


Intelligence 11 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4cd5fc82f7d1094ebe188a372dd682d24083ea423f0b49a057cfacc0af849ac4
SHA3-384 hash: 89c3c85ebafcf7e4a51acb89c742d0c9a96f5705ddc6f6afb5e0353c10a9fd577a9217546884593875ba69f742f16e64
SHA1 hash: 075c6c06080a5662eb649c407d53bbf9b696a03f
MD5 hash: 6101d457ad1e2db80e960961e706f288
humanhash: massachusetts-pizza-queen-maine
File name:TT Payment Copy.xlsx
Download: download sample
Signature Formbook
Create hunting rule
File size:395'941 bytes
First seen:2021-01-22 13:12:16 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 6144:CTeOzF0odq/yA0F2wyhaWduJnxB52/mWdkzr0LAN6v7YwC5pW25Ix/xj+13dvui5:C+0F2wMZUxX2/xbANA72ahO31ui5
TLSH 6484231BD6F1BF4E82986074A710363DEAC3148A6B82936467D7E57B52707F7EA0881C
Reporter lowmal3
Tags:FormBook

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 dump

MalwareBazaar was able to identify 2 sections in this file using oledump:

Section IDSection sizeSection name
A1387156 bytesole10nAtIVe

Intelligence

File Origin
# of uploads :
1
# of downloads :
124
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
TT Payment Copy.xlsx
Verdict:
Malicious activity
Analysis date:
2021-01-22 13:13:50 UTC
Tags:
exploit CVE-2017-11882 loader formbook trojan stealer opendir
Link:
https://app.any.run/tasks/1a69e5c9-1464-43be-9578-948d6459d3f9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
False
Detection(s):
SecuriteInfo.com.Malware.XML.Autoload-1.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.EQAndMisCasedOleNativeWasTheCaseThatTheyGaveMe.20200215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file
Launching cmd.exe command interpreter
Deleting a recently created file
Possible injection to a system process
Sending an HTTP GET request
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process by context flags manipulation
Running batch commands by exploiting the app vulnerability
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
OOXML Excel File with Embedding Objects
Link:
https://app.docguard.net/4cd5fc82f7d1094ebe188a372dd682d24083ea423f0b49a057cfacc0af849ac4/results/dashboard
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/588315
Signature
.NET source code contains potential unpacker
Drops PE files to the user root directory
Found malware configuration
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
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 submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious Program Location Process Starts
System process connects to network (likely due to code injection or exploit)
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 AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 343184 Sample: TT Payment  Copy.xlsx Startdate: 22/01/2021 Architecture: WINDOWS Score: 100 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 16 other signatures 2->55 11 EQNEDT32.EXE 11 2->11         started        16 EXCEL.EXE 57 12 2->16         started        process3 dnsIp4 47 91.235.129.146, 49165, 80 ITLDC-NLUA Ukraine 11->47 35 C:\Users\user\...\T6ooO6Sgu7fJZkl[1].exe, PE32 11->35 dropped 37 C:\Users\Public\name.exe, PE32 11->37 dropped 73 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->73 18 cmd.exe 11->18         started        39 C:\Users\user\...\~$TT Payment  Copy.xlsx, data 16->39 dropped file5 signatures6 process7 process8 20 name.exe 18->20         started        signatures9 57 Machine Learning detection for dropped file 20->57 59 Tries to detect virtualization through RDTSC time measurements 20->59 61 Injects a PE file into a foreign processes 20->61 23 name.exe 20->23         started        process10 signatures11 63 Modifies the context of a thread in another process (thread injection) 23->63 65 Maps a DLL or memory area into another process 23->65 67 Sample uses process hollowing technique 23->67 69 Queues an APC in another process (thread injection) 23->69 26 explorer.exe 23->26 injected process12 dnsIp13 41 lasvegasproducecompany.com 34.102.136.180, 49166, 80 GOOGLEUS United States 26->41 43 xalapaqr.com 65.99.225.120, 49167, 80 AS-TIERP-36024US United States 26->43 45 2 other IPs or domains 26->45 71 System process connects to network (likely due to code injection or exploit) 26->71 30 msdt.exe 26->30         started        signatures14 process15 signatures16 75 Modifies the context of a thread in another process (thread injection) 30->75 77 Maps a DLL or memory area into another process 30->77 79 Tries to detect virtualization through RDTSC time measurements 30->79 33 cmd.exe 30->33         started        process17
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4cd5fc82f7d1094ebe188a372dd682d24083ea423f0b49a057cfacc0af849ac4/
Threat name:
Win32.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-01-22 13:13:06 UTC
AV detection:
24 of 46 (52.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jtk7zaxx2eeu5pqyri3s3vuc2jaih2sch4futicxz6wmbl4etlca._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook ransomware rat spyware stealer trojan
Link:
https://tria.ge/reports/210122-wg4p7c8han/
Behaviour
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.darkatnightstudio.com/rbs/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Exploit
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4cd5fc82f7d1094ebe188a372dd682d24083ea423f0b49a057cfacc0af849ac4

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: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 xlsx 4cd5fc82f7d1094ebe188a372dd682d24083ea423f0b49a057cfacc0af849ac4

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments