MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c97f3c263a8cf99b9535d4cb5276eaab9e07fca8c51ac010d5fbfbad6fc5261d. 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 7 File information Comments
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SHA256 hash: c97f3c263a8cf99b9535d4cb5276eaab9e07fca8c51ac010d5fbfbad6fc5261d
SHA3-384 hash: 97af8339decb6d96f81ef8152a2dacff33968d95948da7b0c56d5f7f1c90c02aaf922b580900e61c9617e1256361bfda
SHA1 hash: 24dd619febf36dd1816770675decb254a351e081
MD5 hash: 0560b3530342bf45528a88bb8d760db6
humanhash: leopard-ten-seven-utah
File name:Confirmation Transfer Ref_MT103_0023456891099200.exe
Download: download sample
Signature Formbook
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File size:1'640'960 bytes
First seen:2022-04-21 07:18:10 UTC
Last seen:2022-04-21 10:23:57 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'470 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:/5WtNmu+6PzJI2C26F3CooCeBpuzs26IkuM1jy1I4UciruOY6CME:Ut+6PDqggI4U
TLSH T179754C0DB24B854AE5588B30DAB3A7141F908FB68DD19307E7B5363AD43B3BD56843A3
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 eadaaabaaaa28c8e (4 x Formbook, 1 x SnakeKeylogger)
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
2
# of downloads :
258
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/265335/
Detection(s):
Win.Trojan.EmbeddedDotNetBinary-9940868-0
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Win.Trojan.EmbeddedReversedDLL-9940922-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Sending a custom TCP request
Launching a process
Creating a file
Searching for synchronization primitives
Launching cmd.exe command interpreter
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated
Link:
https://www.filescan.io/uploads/6261056aeab80a7a6c51cc29/reports/f1f7d89c-79ef-47b0-9aaf-1e24c7f2e9a9/overview
Result
Verdict:
UNKNOWN
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/f3534751-c3ac-4721-a740-02c35a9ff282
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/980447
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
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)
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
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 612931 Sample: Confirmation Transfer Ref_M... Startdate: 21/04/2022 Architecture: WINDOWS Score: 100 65 www.dannihealth.com 2->65 67 td-ccm-168-233.wixdns.net 2->67 69 gcdn0.wixdns.net 2->69 71 Found malware configuration 2->71 73 Malicious sample detected (through community Yara rule) 2->73 75 Multi AV Scanner detection for dropped file 2->75 77 7 other signatures 2->77 11 Confirmation Transfer Ref_MT103_0023456891099200.exe 1 6 2->11         started        signatures3 process4 file5 59 C:\Users\user\...\Firefox Installer.exe, PE32 11->59 dropped 61 Confirmation Trans...56891099200.exe.log, ASCII 11->61 dropped 63 C:\...\Firefox Installer.exe:Zone.Identifier, ASCII 11->63 dropped 79 Writes to foreign memory regions 11->79 81 Injects a PE file into a foreign processes 11->81 15 RegAsm.exe 11->15         started        18 RegAsm.exe 11->18         started        20 cmd.exe 1 11->20         started        signatures6 process7 signatures8 93 Modifies the context of a thread in another process (thread injection) 15->93 95 Maps a DLL or memory area into another process 15->95 97 Sample uses process hollowing technique 15->97 99 Queues an APC in another process (thread injection) 15->99 22 explorer.exe 15->22 injected 101 Tries to detect virtualization through RDTSC time measurements 18->101 24 conhost.exe 20->24         started        26 timeout.exe 1 20->26         started        process9 process10 28 cscript.exe 22->28         started        31 Firefox Installer.exe 4 22->31         started        33 Firefox Installer.exe 3 22->33         started        signatures11 83 Modifies the context of a thread in another process (thread injection) 28->83 85 Maps a DLL or memory area into another process 28->85 87 Tries to detect virtualization through RDTSC time measurements 28->87 35 cmd.exe 28->35         started        89 Writes to foreign memory regions 31->89 91 Injects a PE file into a foreign processes 31->91 37 cmd.exe 31->37         started        39 RegAsm.exe 31->39         started        41 RegAsm.exe 31->41         started        43 RegAsm.exe 31->43         started        45 cmd.exe 33->45         started        47 RegAsm.exe 33->47         started        process12 process13 49 conhost.exe 35->49         started        51 conhost.exe 37->51         started        53 timeout.exe 37->53         started        55 conhost.exe 45->55         started        57 timeout.exe 45->57         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/c97f3c263a8cf99b9535d4cb5276eaab9e07fca8c51ac010d5fbfbad6fc5261d/
Threat name:
ByteCode-MSIL.Spyware.Noon
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Status:
Malicious
First seen:
2022-04-21 07:19:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
17 of 26 (65.38%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=zf7tyjr2rt4zxfjv2tfve5xkvopap7fiyunmaegv7p52236feyoq._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader campaign:u2po loader persistence rat suricata
Link:
https://tria.ge/reports/220421-h5m4maaaeq/
Behaviour
Delays execution with timeout.exe
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
Adds Run key to start application
Checks computer location settings
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
9a163115b471148bef2b179aa325ffd1dd328ede184b049fb369aceccf259cd7
MD5 hash:
63c013fd2612095c4f7dd52da405ecaa
SHA1 hash:
985bc2c0c2e2755b0cf5bc6107f62e244d020bb9
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/521634ce-499e-4dad-b6a3-27412ed786dc/
SH256 hash:
ba83fe455abf26addbb5a5d1dade38c03f152609b17f35d52d6d6713245ba887
MD5 hash:
42681068deb94d9b9d6229369d6c1f7c
SHA1 hash:
536e7f781b570c93fa5d69c33065a7133783e1ab
Detections:
win_formbook_g0
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win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/521634ce-499e-4dad-b6a3-27412ed786dc/
SH256 hash:
083076fea78f43fb2beb9e13a6f63d4eaaf2891a3fab61c2dec914cf096af42f
MD5 hash:
9b91c875308da5b8e9a2149a4621ff73
SHA1 hash:
9f0aedaa3d60b8e1b594b9de6a54486099321250
Link:
https://www.unpac.me/results/521634ce-499e-4dad-b6a3-27412ed786dc/
SH256 hash:
c97f3c263a8cf99b9535d4cb5276eaab9e07fca8c51ac010d5fbfbad6fc5261d
MD5 hash:
0560b3530342bf45528a88bb8d760db6
SHA1 hash:
24dd619febf36dd1816770675decb254a351e081
Link:
https://www.unpac.me/results/521634ce-499e-4dad-b6a3-27412ed786dc/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c97f3c263a8c/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.95
Link:
https://yomi.yoroi.company/submissions/c97f3c263a8cf99b9535d4cb5276eaab9e07fca8c51ac010d5fbfbad6fc5261d

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_EXE_Packed_SmartAssembly
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Author:ditekSHen
Description:Detects executables packed with SmartAssembly
Rule name:malware_Formbook_strings
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Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash
Rule name:Typical_Malware_String_Transforms
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Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Typical_Malware_String_Transforms_RID3473
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Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:win_formbook_auto
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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.

Malspam

Formbook

Executable exe c97f3c263a8cf99b9535d4cb5276eaab9e07fca8c51ac010d5fbfbad6fc5261d

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/265335/

Comments