MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6bce7b4a9dc4b092b2940ee941b8defdc5d60c56a57b2621aa3ac6b957e3cdfd. 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
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SHA256 hash: 6bce7b4a9dc4b092b2940ee941b8defdc5d60c56a57b2621aa3ac6b957e3cdfd
SHA3-384 hash: 78d6577368daa398c624c05e7032386c4d18e27c7fa9bb50026850ccabddb8850144c05e9f15ca40b079c5437a0e56e5
SHA1 hash: 4b6cf28d623cfccebcc3bfa7690eaf368db3e2cd
MD5 hash: ea94200553f2e6aaa1820bb7e5d2c43f
humanhash: violet-bulldog-mockingbird-johnny
File name:callyzx.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:603'648 bytes
First seen:2021-11-11 15:19:04 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:fsAkJkLt1gp/NTPT2rbSJjcHbtt8+ZzRVL0477oaXnz61QIb:ff5tMFjTzJjI8Kzb0gz
Threatray 11'181 similar samples on MalwareBazaar
TLSH T1B1D4F19871C5C174E8680E79881689E91323BD7ADE11F75B3DC4F3AE2B333D28624A53
File icon (PE):PE icon
dhash icon 90ba7181e46588f0 (31 x AgentTesla, 11 x Formbook, 9 x Loki)
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
84
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/205009/
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook obfuscated packed
Link:
https://www.filescan.io/uploads/618d34a4a00afa9663a41aa1/reports/a7df696b-fdbb-4fa7-b349-c0c0e70b5b0b/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/3a36b40e-258a-4245-bab4-02abdbc10aad
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/887547
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
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
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 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: 520018 Sample: callyzx.exe Startdate: 11/11/2021 Architecture: WINDOWS Score: 100 35 www.giridharsweb.com 2->35 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Antivirus detection for URL or domain 2->45 47 6 other signatures 2->47 11 callyzx.exe 3 2->11         started        signatures3 process4 file5 33 C:\Users\user\AppData\...\callyzx.exe.log, ASCII 11->33 dropped 61 Tries to detect virtualization through RDTSC time measurements 11->61 15 callyzx.exe 11->15         started        18 callyzx.exe 11->18         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 Queues an APC in another process (thread injection) 15->69 20 explorer.exe 15->20 injected process9 signatures10 49 System process connects to network (likely due to code injection or exploit) 20->49 51 Uses netsh to modify the Windows network and firewall settings 20->51 23 netsh.exe 20->23         started        process11 signatures12 53 Self deletion via cmd delete 23->53 55 Modifies the context of a thread in another process (thread injection) 23->55 57 Maps a DLL or memory area into another process 23->57 59 Tries to detect virtualization through RDTSC time measurements 23->59 26 explorer.exe 2 156 23->26         started        29 cmd.exe 1 23->29         started        process13 dnsIp14 37 www.zbyrhb.com 26->37 39 www.aqrd.top 26->39 31 conhost.exe 29->31         started        process15
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/6bce7b4a9dc4b092b2940ee941b8defdc5d60c56a57b2621aa3ac6b957e3cdfd/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-11-11 11:51:33 UTC
AV detection:
19 of 28 (67.86%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
46a0a8595dccf134213c2e9ae10dd6fdd8e3ff5f0cb1b01014a6b67e31927eec
Formbook
65acd8c73c518c97a1539bc8e3f62fb8f06431d7030c6cc1463c855aec0ec46f
Formbook
779b3d4b4260713c0311e93b9cfc9c91c74242f608d2024f7d257b00f6e7b94c
Formbook
9f6277c9f028bd5ba1acf206a4d9dc8ffcd0624240c095445607bf59de709a6f
Formbook
ac021bbe155b54ac93bd5ca40b6ca6130174d6d192c6fd2011e9677d56c09f4d
Formbook
b0cfa1848c7b08eb881e615731493df57963468fa3fb461ebf1468271dd17a14
Formbook
c96178775d7f8dd8b06a4e59aad0367f36abc11680081acfcc2b446fb0ee28b1
Formbook
cce115dcfb19503dfbc71566681425094ca56887fc1afe85b9bc9788341312bf
Formbook
e14df53adff2889344d4502133a00a389e06039715c26a7724ed3f046fc683a1
Formbook
f2a5c2addef1471e98841eb5f2abbc5cd27c360f8850a69ef0a233d07744a9b8
Formbook
+ 11'171 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:cy88 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/211111-sqrtdagfan/
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
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.jamesobrien.school/cy88/
Unpacked files
SH256 hash:
b9da25075c3e27a81cdf9207fbd574f974b87ec847bfcdef59d8bd8fade072e0
MD5 hash:
98574b67657a1644171b3038cfd9561b
SHA1 hash:
6fcd3a68800350b0152f995b8e79c15b09eb44d5
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/f60be170-dac6-475d-840a-7203db65d70c/
Parent samples :
a1c782659ddb9232f1d6b0619efe815b0fb61d6c4524e28dbfb3bae4b449738a
6bce7b4a9dc4b092b2940ee941b8defdc5d60c56a57b2621aa3ac6b957e3cdfd
557260d94ea20dcd980632dbc467735f881adf78037f64198931427a2d3a4347
ea074d89ce669e6d00d54a7fce58a5394a075611740346df298cb55926ac9a55
55e7f104009ae1f8c59a850b57d7f660dbb8dc7cdeeadc7c1c396294bb656ac0
4253f88eb5e931720c16e56f49babfbf8db93eaa8b6f85146cc2d690aee2b9d2
SH256 hash:
bd4c4912209802bb457983177d94b220d20dc9775ff973f90bd1c6afd729bc9c
MD5 hash:
8cde05c2cc918a68b075bdb2854c9994
SHA1 hash:
bc3c4e2826370171102ee8b7bd317493cd72c15f
Link:
https://www.unpac.me/results/f60be170-dac6-475d-840a-7203db65d70c/
SH256 hash:
d50677a693f2c5f292fd67018a0443989ce4ffc9ae89789cf45d2e6c27f1a955
MD5 hash:
d523f8ad558541e68263dd754576b9c0
SHA1 hash:
405c9ecfb7798065f21ca56ac748123f10e10e4e
Link:
https://www.unpac.me/results/f60be170-dac6-475d-840a-7203db65d70c/
SH256 hash:
6bce7b4a9dc4b092b2940ee941b8defdc5d60c56a57b2621aa3ac6b957e3cdfd
MD5 hash:
ea94200553f2e6aaa1820bb7e5d2c43f
SHA1 hash:
4b6cf28d623cfccebcc3bfa7690eaf368db3e2cd
Link:
https://www.unpac.me/results/f60be170-dac6-475d-840a-7203db65d70c/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/6bce7b4a9dc4/report/overview.html
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/6bce7b4a9dc4b092b2940ee941b8defdc5d60c56a57b2621aa3ac6b957e3cdfd

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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/205009/
  
URLhaus
https://urlhaus.abuse.ch/url/1763345/

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