MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 84bf3eb0436e9203d62a0e5970410f73299731e4d711c3a88f52cef601246302. 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
| SHA256 hash: | 84bf3eb0436e9203d62a0e5970410f73299731e4d711c3a88f52cef601246302 |
|---|---|
| SHA3-384 hash: | bb256f1567fa51efc7fa83a0849588312c13f84ff8740d4ebaa961c5ea7f7ec95ede6cc990789ee7dd07940c8a870768 |
| SHA1 hash: | ae6cb7a2f30c0be4573ace1cf773060694273de4 |
| MD5 hash: | 1bb337e4bb33171b2dc5d2ddccf103a5 |
| humanhash: | arkansas-undress-single-october |
| File name: | vbc.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 336'125 bytes |
| First seen: | 2022-03-07 18:20:25 UTC |
| Last seen: | 2022-03-07 19:37:07 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 7fa974366048f9c551ef45714595665e (946 x Formbook, 398 x Loki, 261 x AgentTesla) |
| ssdeep | 6144:rGi0ZVL2S5AqgZDfVmCbfX84PXibwgCyPPfSqNH9ncw5/pI3M0RExrhk9er:yVaSeqgZDtmG04/nMigH9n55hMFubr |
| Threatray | 13'890 similar samples on MalwareBazaar |
| TLSH | T129642227A3C06E77D3538B712BBFEF7D93B3B0994B555A9B17001CF1391A8C286A5242 |
| File icon (PE): |  |
| dhash icon | b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla) |
| Reporter | Anonymous |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
2
# of downloads :
223
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Reading critical registry keys
Setting browser functions hooks
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Generic Malware
Verdict:
Malicious
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
C2 URLs / IPs found in malware configuration
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
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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:
Detection:
formbook
Threat name:
Win32.Trojan.FormBook
Status:
Malicious
First seen:
2022-03-07 15:22:54 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
21 of 27 (77.78%)
Threat level:
5/5
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 13'880 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook campaign:m48e rat spyware stealer suricata trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Uses the VBS compiler for execution
Executes dropped EXE
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
84bf3eb0436e9203d62a0e5970410f73299731e4d711c3a88f52cef601246302
MD5 hash:
1bb337e4bb33171b2dc5d2ddccf103a5
SHA1 hash:
ae6cb7a2f30c0be4573ace1cf773060694273de4
Malware family:
FormBook
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.18
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: | malware_Formbook_strings |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect Formbook in memory |
| Reference: | internal research |
| Rule name: | win_formbook_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.formbook. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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