MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f90d42980450652ef19fe55ebea9e68683b4d29027900dcbeb5c26d298318fc. 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: 9


Intelligence 9 IOCs YARA File information Comments
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SHA256 hash: 4f90d42980450652ef19fe55ebea9e68683b4d29027900dcbeb5c26d298318fc
SHA3-384 hash: 8622913970b7c217a53a6729341dcad6fbc22bbf38c4b391437b846a9ef86178576ac7a0ec5dd55a33c98a46c791f899
SHA1 hash: 715b71b3e7393c7bd1aa50a824e32b6408b6cbae
MD5 hash: fa2b81bb3c092af37132e48f36fa92c3
humanhash: princess-oxygen-mockingbird-vegan
File name:sample.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:509'440 bytes
First seen:2020-09-14 19:02:27 UTC
Last seen:2020-09-14 21:02:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:Y/hpMAp2iNtv2zv1gvExBHMxS1iz23RNjxs8zUle01Eqm:Y/p1m2sHsy93tj0
Threatray 2'237 similar samples on MalwareBazaar
TLSH 2AB4F166E75EAB04E1ED973AC0D0127042FACCE6AA21F63F6DD831FD26B53DD1190642
Reporter GovCERT_CH
Tags:FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/59541/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.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 a process
Launching cmd.exe command interpreter
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/465752
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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)
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
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)
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 285284 Sample: sample.exe Startdate: 14/09/2020 Architecture: WINDOWS Score: 100 52 www.willowbeemasks.com 2->52 54 willowbeemasks.com 2->54 62 Malicious sample detected (through community Yara rule) 2->62 64 Antivirus detection for dropped file 2->64 66 Antivirus / Scanner detection for submitted sample 2->66 68 10 other signatures 2->68 11 sample.exe 3 2->11         started        signatures3 process4 file5 50 C:\Users\user\AppData\...\sample.exe.log, ASCII 11->50 dropped 92 Tries to detect virtualization through RDTSC time measurements 11->92 94 Injects a PE file into a foreign processes 11->94 15 sample.exe 11->15         started        signatures6 process7 signatures8 96 Modifies the context of a thread in another process (thread injection) 15->96 98 Maps a DLL or memory area into another process 15->98 100 Sample uses process hollowing technique 15->100 102 Queues an APC in another process (thread injection) 15->102 18 explorer.exe 4 6 15->18 injected process9 dnsIp10 56 www.cape-winelands.info 41.203.18.177, 49763, 49764, 49765 xneeloZA South Africa 18->56 58 www.theplayhousecafe.com 142.0.139.129, 49760, 49761, 49762 PEGTECHINCUS United States 18->58 60 2 other IPs or domains 18->60 44 C:\Users\user\AppData\...\user8pl8ft.exe, PE32 18->44 dropped 76 System process connects to network (likely due to code injection or exploit) 18->76 78 Benign windows process drops PE files 18->78 23 wlanext.exe 1 17 18->23         started        27 user8pl8ft.exe 2 18->27         started        29 user8pl8ft.exe 3 18->29         started        31 3 other processes 18->31 file11 signatures12 process13 file14 46 C:\Users\user\AppData\...\J48logrv.ini, data 23->46 dropped 48 C:\Users\user\AppData\...\J48logri.ini, data 23->48 dropped 80 Detected FormBook malware 23->80 82 Tries to steal Mail credentials (via file access) 23->82 84 Tries to harvest and steal browser information (history, passwords, etc) 23->84 90 2 other signatures 23->90 33 cmd.exe 1 23->33         started        86 Injects a PE file into a foreign processes 27->86 35 user8pl8ft.exe 27->35         started        38 user8pl8ft.exe 27->38         started        40 user8pl8ft.exe 29->40         started        88 Tries to detect virtualization through RDTSC time measurements 31->88 signatures15 process16 signatures17 42 conhost.exe 33->42         started        70 Modifies the context of a thread in another process (thread injection) 40->70 72 Maps a DLL or memory area into another process 40->72 74 Sample uses process hollowing technique 40->74 process18
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4f90d42980450652ef19fe55ebea9e68683b4d29027900dcbeb5c26d298318fc/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-09-14 10:38:58 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j6inikmaiudff3yz7zk6x2u6nbudwtjjaj4qbxf6wxbg2kmddd6a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
netwirerc
Create hunting rule
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Formbook
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Formbook
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Formbook
a05ae5c56a5a5c24f2c7276f2c669cb33c09f87d75a09030b094f12a4a1a17fa
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ad660d774f78137622d038976557c8782211dbfd39d2ff9a7a4bcc9279ba0f41
Formbook
b2a437bec36856a90558f9f54873096e6d1324cf487cc265038dbe82e5b03788
Formbook
b3423777b1bafbe661edd1f4d3d98e72fcb48394764ddeb57bb913b881cf9177
Formbook
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Formbook
+ 2'227 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/200914-p7fqrlm7hs/
Behaviour
Suspicious behavior: EnumeratesProcesses
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
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.calsem.xyz/kbr/
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

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

Malspam

Formbook

rar 8537dc2194884b6ec88e9bc44963b4b1dc34b28505fd20330f5ed137e63cafe6

Formbook

Executable exe 4f90d42980450652ef19fe55ebea9e68683b4d29027900dcbeb5c26d298318fc

(this sample)

  
Dropped by
MD5 40237d6a3c84f02516bda17f8b957322
  
Dropped by
SHA256 8537dc2194884b6ec88e9bc44963b4b1dc34b28505fd20330f5ed137e63cafe6
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/59541/

Comments