MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3d8ff1b4492a541b44c03733b090c73fd992535d8c4e867abc0e6aeaf5b58b30. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3d8ff1b4492a541b44c03733b090c73fd992535d8c4e867abc0e6aeaf5b58b30
SHA3-384 hash: 928d3bc442c4fce4b355d1b02ed191d127f7d40c87e0348a565a720d535ba9f961231dce4d5bf9916498ea5f282e529b
SHA1 hash: 511ff047339ebf04eea15a9c3b309cf21eca9547
MD5 hash: b5fe57b1a664e5cbc76ea0fe617a7810
humanhash: tennessee-hamper-lithium-sixteen
File name:PO#99430.doc.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:856'576 bytes
First seen:2020-08-13 10:09:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'599 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:wS1zkkNtheQhnpO/gZyc9Dqj18q4pkxv7VjlHZJx9S67O8+GefBgo0z/k:JGQZZyT185gvBa8+Gefg/k
Threatray 2'314 similar samples on MalwareBazaar
TLSH 31057D357301D87CC6B98430F0A9D282292939453ECA9E9A67DBE7DC1A3289F771707D
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: slot0.sanrentas.com
Sending IP: 104.168.236.22
From: import and export department <info@sanrentas.com>
Reply-To: import and export department <info@sanrentas.com>
Subject: order PO#99430
Attachment: PO99430.doc.rar (contains "PO#99430.doc.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
74
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/45071/
Detection(s):
Win.Malware.Formbook-7399661-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Sending a UDP request
Creating a file
Creating a process from a recently created file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/425784
Signature
Allocates memory in foreign processes
Detected FormBook malware
Initial sample is a PE file and has a suspicious name
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)
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
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Uses an obfuscated file name to hide its real file extension (double extension)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 265462 Sample: PO#99430.doc.exe Startdate: 14/08/2020 Architecture: WINDOWS Score: 100 39 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->39 41 Malicious sample detected (through community Yara rule) 2->41 43 Yara detected FormBook 2->43 45 3 other signatures 2->45 10 PO#99430.doc.exe 6 2->10         started        process3 file4 33 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 10->33 dropped 35 C:\Users\user\AppData\Local\Temp\...\l.dll, PE32 10->35 dropped 57 Writes to foreign memory regions 10->57 59 Allocates memory in foreign processes 10->59 61 Tries to detect virtualization through RDTSC time measurements 10->61 63 Injects a PE file into a foreign processes 10->63 14 AddInProcess32.exe 10->14         started        signatures5 process6 signatures7 65 Modifies the context of a thread in another process (thread injection) 14->65 67 Maps a DLL or memory area into another process 14->67 69 Sample uses process hollowing technique 14->69 71 2 other signatures 14->71 17 explorer.exe 14->17 injected process8 dnsIp9 37 www.illuminaters.com 202.254.234.133, 49742, 80 SAKURA-CSAKURAInternetIncJP Japan 17->37 47 System process connects to network (likely due to code injection or exploit) 17->47 21 msdt.exe 1 17 17->21         started        signatures10 process11 file12 29 C:\Users\user\AppData\...\5M5logrv.ini, data 21->29 dropped 31 C:\Users\user\AppData\...\5M5logri.ini, data 21->31 dropped 49 Detected FormBook malware 21->49 51 Tries to steal Mail credentials (via file access) 21->51 53 Tries to harvest and steal browser information (history, passwords, etc) 21->53 55 3 other signatures 21->55 25 cmd.exe 1 21->25         started        signatures13 process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3d8ff1b4492a541b44c03733b090c73fd992535d8c4e867abc0e6aeaf5b58b30/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-13 10:11:08 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hwh7dncjfjkbwrgag4z3beghh7mzeu25rrhim6v4bzvov5nvrmya._file
Verdict:
malicious
Similar samples:
0e7ba6c8acc0e3de5a31e050eb287daba683c992e12c4715730ef3ccf3bbf575
Formbook
415c22ceb1927b67c21bd55423f75713b29ca6950e806387e28abbbf19ccc8bd
Formbook
4fd6cfb4c08338e8b3a6ec64118aa6ad90350e865e90365b5b700aa41908b984
Formbook
8e2f9a1b23ade94b0803ea57ac92e916daad73d760f075fed8f1443715104531
Formbook
9295ce88660ed117b7cfff0886232a51dc6492bf6100738957bf93fabdb74bb8
Formbook
9d545cae8b73e11800aaf794b2919bb8972511e4e217eaf1a51c3f38c17bb412
Formbook
b25e43fe3f6068eb13b79f8900dea897533005aee7e2139e6676b7cdc92cc588
Formbook
b3289e282e7c031fde98778bac0057bad5d933c85da0b43d95f177c6333fc3c2
Formbook
e04b0836667f55bcc1778c62761c99af52cb5c42c14cef3962531512def2944b
Formbook
e548234adb2b484793484466ef99084bb77854de66782af91e38420a198b4f83
Formbook
+ 2'304 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat family:formbook
Link:
https://tria.ge/reports/200813-8z74c113ke/
Behaviour
Formbook Payload
Formbook family
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/3d8ff1b4492a541b44c03733b090c73fd992535d8c4e867abc0e6aeaf5b58b30

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

File information

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

Malspam

Formbook

rar f33e53b450e553b15b609a3223ecaaf4f13fae392b88b2fae27a62c25be34519

Formbook

Executable exe 3d8ff1b4492a541b44c03733b090c73fd992535d8c4e867abc0e6aeaf5b58b30

(this sample)

  
Dropped by
MD5 4b064f9bda46d4dcfffd9ab1faa751f0
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 f33e53b450e553b15b609a3223ecaaf4f13fae392b88b2fae27a62c25be34519
Cape
Cape
https://www.capesandbox.com/analysis/45071/

Comments