MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a3fba91bd7cda8d1f2425dc05210f427c7084e12ea6b3f45b64d6da356f036d1. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a3fba91bd7cda8d1f2425dc05210f427c7084e12ea6b3f45b64d6da356f036d1
SHA3-384 hash: 78ff24d9a5121c0d9b28dd15f0c2a3c22a6f1e2527f0a7f7d69a0e730529c646a3bc701f8cf3083871f51c276c40e9dc
SHA1 hash: fede87b997668a1f22a16c2fe5ef281a564abf31
MD5 hash: 626f13315a7626b0d2c9bfc1c8f1f8be
humanhash: michigan-romeo-item-lactose
File name:Purchase Order4503284572.PDF.exe
Download: download sample
Signature Formbook
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File size:387'584 bytes
First seen:2021-10-28 06:36:28 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'750 x AgentTesla, 19'656 x Formbook, 12'248 x SnakeKeylogger)
ssdeep 6144:1RYxF0QLummwzsapkScp9Z/m6fovJe1clxXXkVAhcL4b2nnW6mZ07X1MS:HfQLxxzsdScFBwvJwUxHw4b8R7e
Threatray 10'977 similar samples on MalwareBazaar
TLSH T164840241F32A43B3D9ED47BA58A34A2403B36E7BA570EB0D2E9470D96FB37411912E53
File icon (PE):PE icon
dhash icon f99924e3634948d0 (37 x AgentTesla, 12 x SnakeKeylogger, 7 x Formbook)
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
127
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/200802/
Detection(s):
SecuriteInfo.com.Suspicious.Win32.Save.a.22471.25471.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/617a4512a9d585e6d53cb215/reports/499f1a82-f38e-4558-9e70-5fef9d791f60/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/355e390d-266b-40ee-a1ff-27f67fd24e02
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/878329
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Executable has a suspicious name (potential lure to open the executable)
Found malware configuration
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Suspicious Double Extension
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Uses netsh to modify the Windows network and firewall settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 510763 Sample: Purchase Order4503284572.PDF.exe Startdate: 28/10/2021 Architecture: WINDOWS Score: 100 32 www.digitalgoodsworld.com 2->32 34 www.241mk.com 2->34 44 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->44 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 11 other signatures 2->50 11 Purchase Order4503284572.PDF.exe 3 2->11         started        signatures3 process4 file5 30 C:\...\Purchase Order4503284572.PDF.exe.log, ASCII 11->30 dropped 64 Injects a PE file into a foreign processes 11->64 15 Purchase Order4503284572.PDF.exe 11->15         started        signatures6 process7 signatures8 66 Modifies the context of a thread in another process (thread injection) 15->66 68 Maps a DLL or memory area into another process 15->68 70 Sample uses process hollowing technique 15->70 72 Queues an APC in another process (thread injection) 15->72 18 explorer.exe 15->18 injected process9 dnsIp10 36 www.telecluber.com 107.151.148.188, 80 ZNETUS United States 18->36 38 www.9000hr.com 121.46.127.31, 49789, 80 QUICKPACKETUS India 18->38 40 4 other IPs or domains 18->40 52 System process connects to network (likely due to code injection or exploit) 18->52 54 Uses netsh to modify the Windows network and firewall settings 18->54 22 netsh.exe 12 18->22         started        signatures11 process12 dnsIp13 42 www.telecluber.com 22->42 56 Self deletion via cmd delete 22->56 58 Modifies the context of a thread in another process (thread injection) 22->58 60 Maps a DLL or memory area into another process 22->60 62 Tries to detect virtualization through RDTSC time measurements 22->62 26 cmd.exe 1 22->26         started        signatures14 process15 process16 28 conhost.exe 26->28         started       
Detection:
xloader
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Link:
https://mwdb.cert.pl/sample/a3fba91bd7cda8d1f2425dc05210f427c7084e12ea6b3f45b64d6da356f036d1/
Threat name:
ByteCode-MSIL.Spyware.Noon
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Status:
Malicious
First seen:
2021-10-28 06:37:06 UTC
AV detection:
7 of 44 (15.91%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=up52sg6xzwund4sclxafeehue7dqqtqs5jvt6rnwjvw2gvxqg3iq._file
Verdict:
malicious
Label(s):
formbook
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Similar samples:
5852e0b1479d914e16a2f1cf21d61ff4e1f3d35b6fa5dbcf0055cfc2c9a89936
Formbook
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096
Formbook
6dbd578bacfac6bee49b778b85cd62926c65a7f23bb33ceec705686474308898
Formbook
ae55ee08f18b57a38a47ed9bc161b7833e35c31b014e8579ae904a2d4d7c63e3
Formbook
b3bc74c1f3673da08a95775af5f39dd116a249d8a7e597fcd8bb56e07ae3bcd2
Formbook
cf3038247c7a2a5779f655fdf594bdad56b22d198b6edb1c3197b84d9c4f153a
Formbook
dae6ba220bb0a34de731b57965753391343bfe96f9f3fa4fea48102d3377ccf7
Formbook
e862c2495e79b33c27fd00a29dda3c22df6796ff8aa7fc6294216a46668f9047
Formbook
+ 10'967 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:vocn loader rat
Link:
https://tria.ge/reports/211028-hdhd3ahde2/
Behaviour
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
Suspicious use of SetThreadContext
Deletes itself
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.yourarmorcoating.com/vocn/
Unpacked files
SH256 hash:
bf02a1742aad07fffd5a6af24221ba8bca8aec097893003663cb76d56d4ba696
MD5 hash:
54016fc3775f8efeb0805b8aae683b67
SHA1 hash:
3fbf57d30a18bf5f5af58f8751093a68633e68a8
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/db088010-939f-4370-afaf-eb3ff00c8709/
SH256 hash:
eca557d33f51962be34fe6d6f6dbb8b41738fe74adebea6774d0f935a4326305
MD5 hash:
23871beda15bf11ce20f97c22519e525
SHA1 hash:
69b161b5eb244f01d69c6b524f95ef8f1dc6e162
Link:
https://www.unpac.me/results/db088010-939f-4370-afaf-eb3ff00c8709/
SH256 hash:
4d1ee061c817ea30ca4e461a4f44388662c1c1c2775be2b323858ddbc1679b35
MD5 hash:
1b6d3d31872537cc611ff4322ffc1099
SHA1 hash:
0108adafb207ce044bfb3f7933da45594c545bee
Link:
https://www.unpac.me/results/db088010-939f-4370-afaf-eb3ff00c8709/
SH256 hash:
a3fba91bd7cda8d1f2425dc05210f427c7084e12ea6b3f45b64d6da356f036d1
MD5 hash:
626f13315a7626b0d2c9bfc1c8f1f8be
SHA1 hash:
fede87b997668a1f22a16c2fe5ef281a564abf31
Link:
https://www.unpac.me/results/db088010-939f-4370-afaf-eb3ff00c8709/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/a3fba91bd7cda8d1f2425dc05210f427c7084e12ea6b3f45b64d6da356f036d1

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:pe_imphash
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Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe a3fba91bd7cda8d1f2425dc05210f427c7084e12ea6b3f45b64d6da356f036d1

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/200802/

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