MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4339504bc2ed58024692ebf1d7d3c02e9d5672a670136f97767f5e30fff831e0. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
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SHA256 hash: 4339504bc2ed58024692ebf1d7d3c02e9d5672a670136f97767f5e30fff831e0
SHA3-384 hash: cf685ba4c0f5d0e046be621e5ab4e15186e13fddf0904ed9add15f806abd950412397faa694894149c7eb6f93fc043f4
SHA1 hash: 9e6a950ed7fbbd7f21851e214d984a999de8d386
MD5 hash: 725cd53850cc7b5befa1f2bfd6158949
humanhash: berlin-ceiling-mars-pluto
File name:prueba de pago.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:847'360 bytes
First seen:2022-02-09 16:53:44 UTC
Last seen:2022-02-09 18:14:32 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:Ml/Srt/g7DPl0WVtIPpckfwa2BQObtea9:3t/wDPC5Pnfj26uD
Threatray 13'392 similar samples on MalwareBazaar
TLSH T15905BE2F487E123AC1BCDBB18984CD1FB992CD963533981D299639C919367F230D226F
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
214
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/239754/
Detection(s):
SecuriteInfo.com.Trojan.Inject4.25375.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a process with a hidden window
Creating a window
DNS request
Launching a process
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed replace.exe
Link:
https://www.filescan.io/uploads/6203f1c8a35489c8dafe933b/reports/7adda64c-d017-4acc-b7e3-6b2bf8e2712b/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/d1f9e985-577c-45a9-ba3b-ac01c2cf15fc
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/937064
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus detection for URL or domain
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
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicius Add Task From User AppData Temp
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 569544 Sample: prueba de pago.exe Startdate: 09/02/2022 Architecture: WINDOWS Score: 100 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Antivirus detection for URL or domain 2->46 48 15 other signatures 2->48 10 prueba de pago.exe 7 2->10         started        process3 file4 34 C:\Users\user\AppData\...tIHlHzxsVpYue.exe, PE32 10->34 dropped 36 C:\...tIHlHzxsVpYue.exe:Zone.Identifier, ASCII 10->36 dropped 38 C:\Users\user\AppData\Local\Temp\tmpF08.tmp, XML 10->38 dropped 40 C:\Users\user\...\prueba de pago.exe.log, ASCII 10->40 dropped 50 Writes to foreign memory regions 10->50 52 Allocates memory in foreign processes 10->52 54 Adds a directory exclusion to Windows Defender 10->54 56 Injects a PE file into a foreign processes 10->56 14 RegSvcs.exe 10->14         started        17 powershell.exe 25 10->17         started        19 schtasks.exe 1 10->19         started        signatures5 process6 signatures7 60 Modifies the context of a thread in another process (thread injection) 14->60 62 Maps a DLL or memory area into another process 14->62 64 Sample uses process hollowing technique 14->64 66 2 other signatures 14->66 21 explorer.exe 14->21 injected 23 conhost.exe 17->23         started        25 conhost.exe 19->25         started        process8 process9 27 msdt.exe 21->27         started        signatures10 58 Tries to detect virtualization through RDTSC time measurements 27->58 30 cmd.exe 1 27->30         started        process11 process12 32 conhost.exe 30->32         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/4339504bc2ed58024692ebf1d7d3c02e9d5672a670136f97767f5e30fff831e0/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2022-02-09 16:54:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=im4vas6c5vmaerus5py5pu6af2ovm4vgoajw7f3wp5pdb77yghqa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1088b355d40f002d623e85b8bfe0964599a45abb9fe6c8a4afc8289a85012595
Formbook
6420ceb34588ec91292aa6fcaa2b77b99a4b492a009f51a409fd240d138c7856
Formbook
6f2d71733b4bcab1a04a40168f2900963a9f65c0081a6f1d1832d18b6bae16bb
Formbook
7357d3e9a33b53dcaf335fecb11100acf0fbeeec2ebf668634de7cd1ba931ae1
Formbook
76fb4deca980cbc985a590ac1f8481bc1b08cd9ab19fd24c902cc58347e792f6
Formbook
8ba05ab47459b8f496adf156b26daba787a2c35633142edd047b7d15f1459722
Formbook
8c16cbf4df8137db774d2cb97cc386b052ca7a0b77ee1572fe7a5fc9a5a22ae0
Formbook
ce931ede894759cdd518d9dd8f4a9888b7fa3656bd6fa3bc0b66514b985efb5d
Formbook
d5f77ba2b2ad58cfad5ae3111994ad0f889967e6d4f67ecb9cedf1b8f10a6149
Formbook
+ 13'382 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:gn27 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220209-vejpqsbbfn/
Behaviour
Creates scheduled task(s)
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
Drops file in Windows directory
Suspicious use of SetThreadContext
Checks computer location settings
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
4af67fe719b6d568f75355ea4ea17bb40829338b1808924bdfdb00983879116d
MD5 hash:
de9a3c641eee60c823d76777dc7dfff7
SHA1 hash:
0eed800b61726aef17a63451f1c43dd844a58b29
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/d78c33f6-58fa-4638-bbe8-2de65a7c8d61/
Parent samples :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 hash:
720953555968b6d070cfb96b4ad0b99db933aa63c38a55f7895666eb5ac29fae
MD5 hash:
c507c774afdd767a70ac780e49eadfb6
SHA1 hash:
a955aee05eb9549936ed261a0178676701fa84ea
Link:
https://www.unpac.me/results/d78c33f6-58fa-4638-bbe8-2de65a7c8d61/
SH256 hash:
0cc119786b104cf0aa261a208bf38802b339774ff3d7a42afcd8329d2d7d21c9
MD5 hash:
263b5190f7ac42d83c756dcdf38147bb
SHA1 hash:
78f419fe3936ed7d603706c47230cd3e6ff79ffe
Link:
https://www.unpac.me/results/d78c33f6-58fa-4638-bbe8-2de65a7c8d61/
SH256 hash:
4339504bc2ed58024692ebf1d7d3c02e9d5672a670136f97767f5e30fff831e0
MD5 hash:
725cd53850cc7b5befa1f2bfd6158949
SHA1 hash:
9e6a950ed7fbbd7f21851e214d984a999de8d386
Link:
https://www.unpac.me/results/d78c33f6-58fa-4638-bbe8-2de65a7c8d61/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/4339504bc2ed/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:Skystars_Malware_Imphash
Create hunting rule
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 4339504bc2ed58024692ebf1d7d3c02e9d5672a670136f97767f5e30fff831e0

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/239754/

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