MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 c758a144ef7bd2ff92ebdf26a2cdca36d6b252bf4eb97d175224d000d66b8e4e. 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: 12
| SHA256 hash: | c758a144ef7bd2ff92ebdf26a2cdca36d6b252bf4eb97d175224d000d66b8e4e |
|---|---|
| SHA3-384 hash: | 1f6f6d4a5d5f49366e96e6a1fe9d6266dbfb39007e060afefbb029e44b2436d9e4b095a18049ae85ea0ec642f7b74e1d |
| SHA1 hash: | c755bf788ab93d91f6134e0800150516ee1471d1 |
| MD5 hash: | b37261611d833b5fff7a35ff65c0b8ea |
| humanhash: | seventeen-beer-berlin-tennessee |
| File name: | PI_2992.xlsx |
| Download: | download sample |
| Signature | Formbook |
| File size: | 213'384 bytes |
| First seen: | 2022-05-10 09:48:23 UTC |
| Last seen: | 2022-05-10 14:56:19 UTC |
| File type: |  xlsx |
| MIME type: | application/encrypted |
| ssdeep | 3072:Os+NT0KbKDHIBhrRY6fCUbnRuxEQDNF11pbPsllfWIKw1sNwJDl+Ru9YhcgVbcBj:dhDHCrK6fCUbnRY1L+Lsq+RrShBj |
| TLSH | T1A824122F3E06399EDFF19F31412D890AE235FE016B1644207419F48A87F7A5D48FA99A |
| Reporter |  cyberthint |
| Tags: | CVE-2017-11882 CVE-2018-0802 excel FormBook macro ole xloader xlsx |
cyberthint
We detected on 2022-05-10 date.Dropped Executable Files:
C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\PO2HN1X2\vbc[1].exe (sha256: cd0e5f95d69e940b3f7555489edfe29b2cf27bd2a66ef9019d68c39a4271e9c8)
C:\Users\admin\AppData\Local\Temp\ontkvxymz.exe (sha256: 86b0de8b61e31749f8e8b17f60731928df66fa59072a4ba75410cc19033b6553)
DNS Requests:
dingshicheng.com
ramblingkinkster.com
Connections:
217.160.0.176
185.29.9.18
HTTP Requests:
http://185.29.9.18/2992/vbc.exe
http://www.ramblingkinkster.com/b86g/?PV=bAjICuKTO++ETiss7ncU3GEqPO/C61uAdielS5okOguflAo4cOE5Lsgs4NYURUR+CzNbSQ==&sZQl=pBedbv90RBiDGVF0
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
| Detection: VelvetSweatshop |
MalwareBazaar was able to identify 6 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 64 bytes | DataSpaces/DataSpaceInfo/StrongEncryptionDataSpace |
| 2 | 112 bytes | DataSpaces/DataSpaceMap |
| 3 | 208 bytes | DataSpaces/TransformInfo/StrongEncryptionTransform/Primary |
| 4 | 76 bytes | DataSpaces/Version |
| 5 | 206728 bytes | EncryptedPackage |
| 6 | 224 bytes | EncryptionInfo |
Intelligence
File Origin
# of uploads :
4
# of downloads :
547
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
ID:
1
File name:
PI_2992.xlsx
Verdict:
Malicious activity
Analysis date:
2022-05-10 09:28:52 UTC
Tags:
encrypted opendir exploit CVE-2017-11882 loader formbook trojan stealer
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):
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
Searching for synchronization primitives
Launching a process
Creating a file
Сreating synchronization primitives
Creating a file in the %temp% directory
Changing an executable file
Launching cmd.exe command interpreter
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Infecting executable files
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
OOXML Excel File with Embedding Objects in Encrypted Excel File
Document image
Image:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
control.exe CVE-2018-0802 embedequation exploit shell32.dll shellcode VelvetSweatshop
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
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
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Detection:
xloader
Threat name:
Document-Office.Exploit.CVE-2017-11882
Status:
Malicious
First seen:
2022-05-10 08:12:52 UTC
File Type:
Document
Extracted files:
52
AV detection:
20 of 41 (48.78%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
xloader
Score:
10/10
Tags:
family:xloader campaign:b86g loader rat suricata
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Uses the VBS compiler for execution
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
exe 86b0de8b61e31749f8e8b17f60731928df66fa59072a4ba75410cc19033b6553
Dropping
SHA256 86b0de8b61e31749f8e8b17f60731928df66fa59072a4ba75410cc19033b6553
Delivery method
Distributed via e-mail attachment
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