MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a733deff759ea8ed7bcb941789e3458cd51b4bb355b66c34a08e3c790ea5f688. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a733deff759ea8ed7bcb941789e3458cd51b4bb355b66c34a08e3c790ea5f688
SHA3-384 hash: 379c69460131d5a4b8ff1fb2f6949c00816116b54dca8a01097644bb5fdc6771bf9c5461548b628d7f139421b57d4ce5
SHA1 hash: fe5297e35cf7a912432f88a10cc63ac7598363a0
MD5 hash: 536325ab0b94900bb0a4371b938a8b4a
humanhash: bulldog-mockingbird-mississippi-sad
File name:u17mv3Hf1BdS3fQ.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:544'768 bytes
First seen:2020-08-12 06:56:42 UTC
Last seen:2020-08-12 07:58:26 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:QiSclvUeJxLfwNsoDsoJN+lwNvY3APy1:PUeJxj8tDsoJIlwNY6y1
Threatray 5'366 similar samples on MalwareBazaar
TLSH BEC4ADCB2EF4DAF1D02977789220074213F6983AAA27DA16FFD352DD093E66277D0506
Reporter abuse_ch
Tags:Endurance exe FormBook


Avatar
abuse_ch
Malspam distributing FormBook:

HELO: 162-241-204-248.unifiedlayer.com
Sending IP: 162.241.204.248
From: Helen He < server@hinet.net>
Subject: Reminder for Quotation
Attachment: Quote2626.zip (contains "u17mv3Hf1BdS3fQ.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
86
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/43976/
Detection(s):
SecuriteInfo.com.Trojan.PWS.Stealer.23680.14494.16953.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching the process to change network settings
Launching cmd.exe command interpreter
Setting browser functions hooks
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/421544
Signature
.NET source code contains potential unpacker
Benign windows process drops PE files
Detected FormBook malware
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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)
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 263237 Sample: u17mv3Hf1BdS3fQ.exe Startdate: 12/08/2020 Architecture: WINDOWS Score: 100 45 www.sfgnewopportunity.com 2->45 51 Malicious sample detected (through community Yara rule) 2->51 53 Yara detected AntiVM_3 2->53 55 Yara detected FormBook 2->55 57 5 other signatures 2->57 11 u17mv3Hf1BdS3fQ.exe 3 2->11         started        signatures3 process4 file5 43 C:\Users\user\...\u17mv3Hf1BdS3fQ.exe.log, ASCII 11->43 dropped 71 Tries to detect virtualization through RDTSC time measurements 11->71 73 Injects a PE file into a foreign processes 11->73 15 u17mv3Hf1BdS3fQ.exe 11->15         started        signatures6 process7 signatures8 75 Modifies the context of a thread in another process (thread injection) 15->75 77 Maps a DLL or memory area into another process 15->77 79 Sample uses process hollowing technique 15->79 81 Queues an APC in another process (thread injection) 15->81 18 explorer.exe 4 6 15->18 injected process9 dnsIp10 47 www.homedecorhandicrafts.com 34.66.135.39, 49737, 80 GOOGLE-AS-APGoogleAsiaPacificPteLtdSG United States 18->47 49 www.nrocleoj.com 18->49 37 C:\Users\user\AppData\...\certmgry0_t.exe, PE32 18->37 dropped 59 System process connects to network (likely due to code injection or exploit) 18->59 61 Benign windows process drops PE files 18->61 23 cmstp.exe 1 17 18->23         started        27 certmgry0_t.exe 18->27         started        29 certmgry0_t.exe 18->29         started        file11 signatures12 process13 file14 39 C:\Users\user\AppData\...\-0Ologrv.ini, data 23->39 dropped 41 C:\Users\user\AppData\...\-0Ologri.ini, data 23->41 dropped 63 Detected FormBook malware 23->63 65 Tries to steal Mail credentials (via file access) 23->65 67 Tries to harvest and steal browser information (history, passwords, etc) 23->67 69 3 other signatures 23->69 31 cmd.exe 23->31         started        33 certmgry0_t.exe 27->33         started        signatures15 process16 process17 35 conhost.exe 31->35         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a733deff759ea8ed7bcb941789e3458cd51b4bb355b66c34a08e3c790ea5f688/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-12 06:58:08 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=u4z5573vt2uo266lsqlyty2frtkrws5tkw3gynfary6hsdvf62ea._file
Verdict:
malicious
Similar samples:
12682b2e7f9831339ab54913afd5fbbe42fb11af2c15d92f53776e5d45e50e94
FormBook
420c2572fe66b34a3e994b43ec3d35a60559c2b011c02c038854a99034a9ca2f
FormBook
47e2cdade33723e82c06a0411695ff32f874ee73024f658cf8c00592dff729a8
FormBook
52487a544f6987349f5cab38dd1cfdd2aac0ac6efff911fc171a1ae844bd9f87
FormBook
67da8a06938ef9c410525c901be8256cd02a9643d67a61f0f8d49c79fcfc6ef5
FormBook
d13e6324eeeba019e6893f6420259df2c840899305447530c99067cadb426cc8
FormBook
d670baae02ac0598fa3964c26f61b1ce8aad0b50e48d4903e37b3cd1be720b6d
FormBook
df55898a2e3ad76e9ca691d178e15d2c499f391be7ed604a10ea7084e02d9446
FormBook
ee4ae13d3fd3b58d86e270db11937476b4b7add1673983c2c28ed4d7dcc75552
FormBook
fa2fea7b2c7e6d02c40890b178133c0c21e6e1182c170c09de4550e85c98e67f
FormBook
+ 5'356 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat spyware trojan stealer family:formbook persistence
Link:
https://tria.ge/reports/200812-spzad9bcle/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Suspicious use of SetThreadContext
Deletes itself
Reads user/profile data of web browsers
Adds policy Run key to start application
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.iskovlay.com/r7m/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.75
Link:
https://yomi.yoroi.company/submissions/a733deff759ea8ed7bcb941789e3458cd51b4bb355b66c34a08e3c790ea5f688

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:win_nymaim_g0
Create hunting rule
Author:mak, msm, CERT.pl

File information

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

Malspam

FormBook

zip 15c68425142fe59d68b6b8a3f4df33c47484d94e49f1ee14ae77f685d3419cf3

FormBook

Executable exe a733deff759ea8ed7bcb941789e3458cd51b4bb355b66c34a08e3c790ea5f688

(this sample)

  
Dropped by
MD5 96026e57bb3fb7ef7e74d30230a1cec4
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/43976/
  
Dropped by
SHA256 15c68425142fe59d68b6b8a3f4df33c47484d94e49f1ee14ae77f685d3419cf3

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