MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b9c1be5f81b9261b1bb68fb0f667a57721bd04b750427a9382844c42d18dba6e. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b9c1be5f81b9261b1bb68fb0f667a57721bd04b750427a9382844c42d18dba6e
SHA3-384 hash: 52e90f88ef6d705120849b1f49b1b655ff5f47d479d6dac690dd0ae9cd69b3649040be8af6bb96209bab10e6d3521571
SHA1 hash: bb4315e844e89f46f230a5172a5220ff7d60c80b
MD5 hash: 3da0759681d198fe698227ccd07077e9
humanhash: nineteen-speaker-steak-magnesium
File name:bunzipped
Download: download sample
Signature FormBook
Create hunting rule
File size:368'640 bytes
First seen:2020-06-02 07:01:50 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:p/Wy4Xzf9ApafZcpYWO2VJSdYLPmwMuj39iB6Yo3o/HlMhZ1hWcE3O143:l1YLfZMMYLPmwMg3Ko3uMhZmcE3OY
Threatray 4'933 similar samples on MalwareBazaar
TLSH F274CFDD326072EFC867D472DEA81C74ABA074BB531B9213906755EDAA0C987CF244F2
Reporter abuse_ch
Tags:bunzipped FormBook


Avatar
abuse_ch
Malspam distributing FormBook:

HELO: barracuda.ebox.ca
Sending IP: 96.127.255.19
From: Alicia Adjei<alicia.adjei@clovergroup.org>
Subject: New order
Attachment: NEW PO3072563851.exe.bz2 (contains "bunzipped")

Intelligence

File Origin
# of uploads :
1
# of downloads :
71
Origin country :
n/a
Vendor Threat Intelligence
Gathering data
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-06-02 07:36:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
26 of 48 (54.17%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xha34x4bxetbwg5wr6ypmz5fo4q32bfxkbbhve4cqrgefumnxjxa._file
Verdict:
malicious
Similar samples:
172842029f8937753e79843e36fcb4715c0f3a9de4b256585847df48caf8e10f
FormBook
3b098abf608b9def35a0cabf2e548dfe01d4f575f6406770be29a25439785978
FormBook
3e98d7f59e495ddfa5140a50f70347bb4a56296ca2dcb6602f65ebb4e4a0373b
FormBook
4a6187dd467be22cbd3eab6807d368c37535c488af22442498423da8124f35fa
FormBook
590fde182a154cd89b15d88546d60351b9fecb51e04fbbf4affd8d49a618bd23
FormBook
5ea463243b051351c219469515fb9b39d01c5c3c4f4698bd6164e36070622d35
FormBook
6b307cbe4f1e8d769af95142d574e77a50654e25cce234f48da6c5e7a7aa4b99
FormBook
6f827b68129d30609057c2e6b36be05649fce91d6bc8ee3d3566ca5c6aba562b
FormBook
6f95416c1006a499c7012c6cde49a27f83223c665cf9b28764030afeb04bf697
FormBook
c3aa64f063330b257fdd6f3d0dd8479b3a4877140b771b4ccf3cae4e10ffe4e9
FormBook
+ 4'923 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook coreentity rat rezer0 spyware stealer trojan
Link:
https://tria.ge/reports/201109-k26vq73c2s/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of UnmapMainImage
Suspicious use of SetThreadContext
Uses the VBS compiler for execution
Formbook Payload
rezer0
CoreEntity .NET Packer
Formbook
Malware Config
C2 Extraction:
http://www.writusp.com/p2p/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator
Rule name:win_formbook_g0
Create hunting rule
Author:Slavo Greminger, SWITCH-CERT

File information

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

Malspam

FormBook

0fa8c40b66010aa718362b8bb897a8ddbb90301af45f7741c1fc11c8ec1d1fbf

FormBook

Executable exe b9c1be5f81b9261b1bb68fb0f667a57721bd04b750427a9382844c42d18dba6e

(this sample)

  
Dropped by
MD5 debeeda2ebd46666ab7d156bfd4ca872
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 0fa8c40b66010aa718362b8bb897a8ddbb90301af45f7741c1fc11c8ec1d1fbf

Comments