MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef2767a533b78c92c5e280c2e5f51e1881a1432815b38bcad3b598f65135c38d. 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 1
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SHA256 hash: ef2767a533b78c92c5e280c2e5f51e1881a1432815b38bcad3b598f65135c38d
SHA3-384 hash: 9dba440f257a9e6bb77432ebb23a7f3f0c9d47b1aaf1b54a7258967258a44ae54add7b5653fc2fb66a50a4a68dbf6ad5
SHA1 hash: 163ba24f48020baedf4a678593646b9eb95ce493
MD5 hash: f57c6feece829fc833c2e427cb35cec9
humanhash: mockingbird-kitten-paris-carpet
File name:f57c6feece829fc833c2e427cb35cec9
Download: download sample
Signature Formbook
Create hunting rule
File size:248'199 bytes
First seen:2022-03-24 19:46:20 UTC
Last seen:2022-03-24 21:57:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 7fa974366048f9c551ef45714595665e (946 x Formbook, 398 x Loki, 261 x AgentTesla)
ssdeep 6144:rGilZYtE+nLvjW4ZqitSlDC7XMlPypX7P8VNrcfbcnw3Ib:sHnDjXZqDO7uqprPoQbcua
Threatray 14'598 similar samples on MalwareBazaar
TLSH T1A434128FE5919A37DED1AD3111FBA26D93B3C18893C124EB53653F7705292934B1CBA0
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
223
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/257365/
Detection(s):
SecuriteInfo.com.Trojan.Siggen17.29255.4365.22215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Sending a custom TCP request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control.exe overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/623cca95b94fb38cb4e5b2e5/reports/453bd5bc-315b-49eb-b1f9-b90d94484353/overview
Result
Verdict:
MALICIOUS
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/153743b2-90a4-41d9-9708-297ccc1def93
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/964019
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
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 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 virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 596501 Sample: fSonK9RfcX Startdate: 24/03/2022 Architecture: WINDOWS Score: 100 34 www.vegastories.com 2->34 36 www.peonyfarm.net 2->36 38 2 other IPs or domains 2->38 54 Found malware configuration 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 Antivirus detection for URL or domain 2->58 60 3 other signatures 2->60 12 fSonK9RfcX.exe 18 2->12         started        signatures3 process4 file5 32 C:\Users\user\AppData\Local\...\xbmuhqb.exe, PE32 12->32 dropped 15 xbmuhqb.exe 12->15         started        process6 signatures7 68 Multi AV Scanner detection for dropped file 15->68 70 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 15->70 72 Tries to detect virtualization through RDTSC time measurements 15->72 74 Injects a PE file into a foreign processes 15->74 18 xbmuhqb.exe 15->18         started        process8 signatures9 46 Modifies the context of a thread in another process (thread injection) 18->46 48 Maps a DLL or memory area into another process 18->48 50 Sample uses process hollowing technique 18->50 52 Queues an APC in another process (thread injection) 18->52 21 explorer.exe 18->21 injected process10 dnsIp11 40 wss.easycompanies.com.au 54.66.241.123, 49818, 49832, 80 AMAZON-02US United States 21->40 42 www.peonyfarm.net 21->42 44 3 other IPs or domains 21->44 62 System process connects to network (likely due to code injection or exploit) 21->62 25 msiexec.exe 21->25         started        signatures12 process13 signatures14 64 Modifies the context of a thread in another process (thread injection) 25->64 66 Maps a DLL or memory area into another process 25->66 28 cmd.exe 1 25->28         started        process15 process16 30 conhost.exe 28->30         started       
Detection:
xloader
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Link:
https://mwdb.cert.pl/sample/ef2767a533b78c92c5e280c2e5f51e1881a1432815b38bcad3b598f65135c38d/
Threat name:
Win32.Trojan.FormBook
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Status:
Malicious
First seen:
2022-03-24 14:11:14 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
22 of 41 (53.66%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=54twpjjtw6gjfrpcqdbol5i6dca2cqzicwzyxswtwwmpmujvyogq._file
Verdict:
malicious
Label(s):
formbook
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Similar samples:
204831bda7d04f0905f7bf0c39e45b3772935726d8a436ee9703a19098b37e21
Formbook
335fa8671bb1ef8659247de4bed05898512fb3a056ef6deb31849eefef8a4743
Formbook
39cc0c369b8ce6f0570864f4ac0019abed40383a582aae1a13c34e2de08a7168
Formbook
3b10fd5bae448476e22cca9c4b9b12263c089af68ebfeb7159ddaf2f4ec3e7bc
Formbook
71bad0685e5b2447a8dcdc960ee2930ad5ec4910d5d449040fb52cb9754df2a2
Formbook
7bd7078e492274101be1289e00a8c17c84a33a836257fe5038149d9e7ab3564e
Formbook
943206c8028ed79aa0aafefa101ffa5d3034cf92b82f705556f12cf0a7eb5a5c
Formbook
da90895ec14c13c733ba3550194ab36a4c64130c5c2b2038c163dff0c505b3e3
Formbook
dae8588b604d0728a1a1ecc77096197a34ed1b22ae7de69a53f39b59e6574ffd
Formbook
ea928c88deed19528dead0fc786936f6ac102f94905ce1bff6df678b7c560726
Formbook
+ 14'588 additional samples on MalwareBazaar
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader campaign:t90i loader rat suricata
Link:
https://tria.ge/reports/220324-yhkmzsacbp/
Behaviour
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
edb5bee980ebb4d6c6b068535e2589d732c738aa531b49f646d37d7b14227398
MD5 hash:
68bd4f54c452420dd3562223c0b106ed
SHA1 hash:
715b6c55e5baf8d6582f334fdf5cd6bc95d7ae7f
Link:
https://www.unpac.me/results/40572b35-dede-4fff-87b8-015aa549c51a/
SH256 hash:
ef2767a533b78c92c5e280c2e5f51e1881a1432815b38bcad3b598f65135c38d
MD5 hash:
f57c6feece829fc833c2e427cb35cec9
SHA1 hash:
163ba24f48020baedf4a678593646b9eb95ce493
Link:
https://www.unpac.me/results/40572b35-dede-4fff-87b8-015aa549c51a/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ef2767a533b7/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.18
Link:
https://yomi.yoroi.company/submissions/ef2767a533b78c92c5e280c2e5f51e1881a1432815b38bcad3b598f65135c38d

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:malware_Formbook_strings
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Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:win_formbook_auto
Create hunting rule
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.

Web download

Formbook

Executable exe ef2767a533b78c92c5e280c2e5f51e1881a1432815b38bcad3b598f65135c38d

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2114288/
Cape
Cape
https://www.capesandbox.com/analysis/257365/

Comments


Avatar
zbet commented on 2022-03-24 19:46:22 UTC

url : hxxp://149.255.35.79/loader/REF%20890387.exe