MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 6f699e2d98b52c522781d82018713d76762429a68bc236f5a155c275ba7b5268. 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: 9
Maldoc score: 9
| SHA256 hash: | 6f699e2d98b52c522781d82018713d76762429a68bc236f5a155c275ba7b5268 |
|---|---|
| SHA3-384 hash: | 1bd85c905c35ff792ed07d4698c1cd36eb00548b4c7b4d707edf2820d0e0db7d68830ea3ab9d08dee827377ff6de9fce |
| SHA1 hash: | 19596f70fcdc6c8156de419a417bd8ec27f77dad |
| MD5 hash: | 19c637c05452ad651ae373885186579f |
| humanhash: | undress-london-grey-red |
| File name: | 19c637c0_by_Libranalysis |
| Download: | download sample |
| Signature | Formbook |
| File size: | 37'888 bytes |
| First seen: | 2021-05-20 14:27:06 UTC |
| Last seen: | Never |
| File type: |  xlsx |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 768:Nck3hOdsylKlgryzc4bNhZFGzE+cL2knAJ0OiCgPZiz7y0yUh38e2+m:Ck3hOdsylKlgryzc4bNhZFGzE+cL2knR |
| TLSH | EF0381E6B296D846DA4903324DE7C6E76766BC115F57838B3389F31E1FB0AC08A13617 |
| Reporter |  Libranalysis |
| 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 id
| Maldoc score: 9 |
| Application name is Microsoft Excel |
| Office document is in OLE format |
| Office document contains VBA Macros |
OLE dump
MalwareBazaar was able to identify 15 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 107 bytes | CompObj |
| 2 | 244 bytes | DocumentSummaryInformation |
| 3 | 200 bytes | SummaryInformation |
| 4 | 15373 bytes | Workbook |
| 5 | 503 bytes | _VBA_PROJECT_CUR/PROJECT |
| 6 | 152 bytes | _VBA_PROJECT_CUR/PROJECTwm |
| 7 | 991 bytes | _VBA_PROJECT_CUR/VBA/Sheet1 |
| 8 | 1269 bytes | _VBA_PROJECT_CUR/VBA/ThisWorkbook |
| 9 | 4370 bytes | _VBA_PROJECT_CUR/VBA/_VBA_PROJECT |
| 10 | 1718 bytes | _VBA_PROJECT_CUR/VBA/__SRP_0 |
| 11 | 294 bytes | _VBA_PROJECT_CUR/VBA/__SRP_1 |
| 12 | 267 bytes | _VBA_PROJECT_CUR/VBA/__SRP_2 |
| 13 | 284 bytes | _VBA_PROJECT_CUR/VBA/__SRP_3 |
| 14 | 633 bytes | _VBA_PROJECT_CUR/VBA/dir |
| 15 | 6141 bytes | _VBA_PROJECT_CUR/VBA/u_mNgXyn_wvfJgOfu1dPFZ7BW3NRa |
OLE vba
MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:
| Type | Keyword | Description |
|---|---|---|
| AutoExec | workbook_open | Runs when the Excel Workbook is opened |
| Suspicious | Run | May run an executable file or a system command |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Chr | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
1
# of downloads :
96
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Legit
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a process with a hidden window
Launching a process
DNS request
Sending an HTTP GET request
Creating a process from a recently created file
Creating a file in the %temp% directory
Creating a file
Launching cmd.exe command interpreter
Deleting a recently created file
Setting browser functions hooks
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Running batch commands by exploiting the app vulnerability
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Result
Verdict:
MALICIOUS
Link:
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
DLL side loading technique detected
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA with many randomly named variables
Document contains an embedded VBA with many string operations indicating source code obfuscation
Document exploit detected (process start blacklist hit)
Found malware configuration
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
Obfuscated command line found
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Microsoft Office Product Spawning Windows Shell
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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:
Threat name:
Document-Word.Trojan.Valyria
Status:
Malicious
First seen:
2021-05-20 14:27:17 UTC
AV detection:
18 of 46 (39.13%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook macro rat spyware stealer trojan xlm
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
NSIS installer
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of SetThreadContext
Enumerates connected drives
Loads dropped DLL
Use of msiexec (install) with remote resource
Blocklisted process makes network request
Executes dropped EXE
Formbook Payload
Formbook
Process spawned unexpected child process
Malware Config
C2 Extraction:
http://www.craftsman-vail.com/cca/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
|---|---|
| Author: | James_inthe_box |
| Description: | Email in files like avemaria |
| Rule name: | IPPort_combo_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | IP and port combo |
| Rule name: | Select_from_enumeration |
|---|---|
| Author: | James_inthe_box |
| Description: | IP and port combo |
| Rule name: | SharedStrings |
|---|---|
| Author: | Katie Kleemola |
| Description: | Internal names found in LURK0/CCTV0 samples |
| Rule name: | UAC_bypass_bin_mem |
|---|---|
| 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.
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