MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3b729120382084eb32f9156b64c9201d0ca2e1ce8a0dffcdcfe25d6f66a80d71. 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: 14


Intelligence 14 IOCs YARA 5 File information Comments
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SHA256 hash: 3b729120382084eb32f9156b64c9201d0ca2e1ce8a0dffcdcfe25d6f66a80d71
SHA3-384 hash: 8cee9b95d333c7abab26fff181717e21b7e76e26aa39b15a3e2db06fd88e060d32f854094fb43a1a8b2487b56751005b
SHA1 hash: fbd3e29231007e8f819ff1998253f24d9d2a39ca
MD5 hash: 4b38118db4f1b91f7cf22af148bac16e
humanhash: mobile-charlie-don-pasta
File name:GsftozContract.exe
Download: download sample
Signature Formbook
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File size:66'048 bytes
First seen:2022-06-15 03:57:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 384:O6uEgZt+zlAxYqvPnj3yt/buVG5NDIc+6ug4rTydHs:FtdjQj2bz5N0EM
TLSH T1295324E3F34F4D1AD7980239AD529910836257FE62374A383DCA3729F44BA135427E9E
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 4f8f090c0c098f4f (6 x AgentTesla, 2 x Formbook, 1 x AsyncRAT)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
277
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
GsftozContract.exe
Verdict:
Malicious activity
Analysis date:
2022-06-15 03:58:42 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/dc8caab7-756b-4e24-af1d-879b52319d6b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/280016/
Detection(s):
SecuriteInfo.com.Trojan.Downloader.10124.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Launching a process
Sending a custom TCP request
Сreating synchronization primitives
DNS request
Unauthorized injection to a recently created process
Creating a file
Launching cmd.exe command interpreter
Searching for synchronization primitives
Setting browser functions hooks
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62a958d84d1ff31e31bfd618/reports/8f5f8645-9e58-46da-a380-2bccbcec4728/overview
Result
Verdict:
SUSPICIOUS
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:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e6633672-5778-4671-8733-4e9c6d699b78
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1013392
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Injects a PE file into a foreign processes
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected Costura Assembly Loader
Yara detected FormBook
Yara detected Generic Downloader
Yara detected MSILDownloaderGeneric
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 645888 Sample: GsftozContract.exe Startdate: 15/06/2022 Architecture: WINDOWS Score: 100 41 Snort IDS alert for network traffic 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Antivirus / Scanner detection for submitted sample 2->45 47 9 other signatures 2->47 9 GsftozContract.exe 15 3 2->9         started        process3 dnsIp4 39 cdn.discordapp.com 162.159.129.233, 443, 49756 CLOUDFLARENETUS United States 9->39 31 C:\Users\user\...behaviorgraphsftozContract.exe.log, ASCII 9->31 dropped 57 Tries to detect virtualization through RDTSC time measurements 9->57 59 Injects a PE file into a foreign processes 9->59 14 GsftozContract.exe 9->14         started        17 powershell.exe 15 9->17         started        file5 signatures6 process7 signatures8 61 Modifies the context of a thread in another process (thread injection) 14->61 63 Maps a DLL or memory area into another process 14->63 65 Sample uses process hollowing technique 14->65 67 Queues an APC in another process (thread injection) 14->67 19 cmmon32.exe 14->19         started        22 explorer.exe 14->22 injected 25 conhost.exe 17->25         started        process9 dnsIp10 49 Modifies the context of a thread in another process (thread injection) 19->49 51 Maps a DLL or memory area into another process 19->51 53 Tries to detect virtualization through RDTSC time measurements 19->53 27 cmd.exe 1 19->27         started        33 www.981kkk.com 172.86.82.212, 49843, 80 M247GB United States 22->33 35 www.lhyuan.com 107.187.41.142, 49845, 80 EGIHOSTINGUS United States 22->35 37 3 other IPs or domains 22->37 55 System process connects to network (likely due to code injection or exploit) 22->55 signatures11 process12 process13 29 conhost.exe 27->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3b729120382084eb32f9156b64c9201d0ca2e1ce8a0dffcdcfe25d6f66a80d71/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-06-14 23:22:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hnzjcibyeccowmxzcvvwjsjadugkfyoorig77top4jow6zvibvyq._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:a84y rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220615-ejg4psbhcj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
3b729120382084eb32f9156b64c9201d0ca2e1ce8a0dffcdcfe25d6f66a80d71
MD5 hash:
4b38118db4f1b91f7cf22af148bac16e
SHA1 hash:
fbd3e29231007e8f819ff1998253f24d9d2a39ca
Link:
https://www.unpac.me/results/7ed96242-6391-45ac-a60a-26a19e5a6a78/
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3b7291203820/report/overview.html
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/3b729120382084eb32f9156b64c9201d0ca2e1ce8a0dffcdcfe25d6f66a80d71

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:INDICATOR_SUSPICIOUS_EXE_DiscordURL
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Author:ditekSHen
Description:Detects executables Discord URL observed in first stage droppers
Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:SUSP_Discord_Attachments_URL
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Author:SECUINFRA Falcon Team
Description:Detects a PE file that contains an Discord Attachments URL. This is often used by Malware to download further payloads
Rule name:SUSP_PE_Discord_Attachment_Oct21_1
Create hunting rule
Author:Florian Roth
Description:Detects suspicious executable with reference to a Discord attachment (often used for malware hosting on a legitimate FQDN)
Reference:Internal Research

File information

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

Malspam

Formbook

Executable exe 3b729120382084eb32f9156b64c9201d0ca2e1ce8a0dffcdcfe25d6f66a80d71

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/280016/

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