MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4b5237de09448f0adfe3cf6838fad36eaaeb192634bf0ea71bd525699c02dff. 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: a4b5237de09448f0adfe3cf6838fad36eaaeb192634bf0ea71bd525699c02dff
SHA3-384 hash: 218fe69c92afb642688a4977616f63f48159c9724e7c51bc510fb8b2daf08e15faf60bef50c28dc951371d771fe8df7a
SHA1 hash: 2dcb9511d7912aa203d42adee4e91f61951ca832
MD5 hash: 43c6e39b238fd77c8bfb7f3178b47ebc
humanhash: march-autumn-golf-fifteen
File name:Prince_Silvero_S.A.00023121.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:266'614 bytes
First seen:2021-11-12 23:17:44 UTC
Last seen:2021-11-13 01:18:23 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 7fa974366048f9c551ef45714595665e (946 x Formbook, 398 x Loki, 261 x AgentTesla)
ssdeep 6144:rGiBjTSLnedMndqpO16SIEqLbduouCwHnFxKKxTescBbY:Y7UBOvGLYogHFxZHks
Threatray 11'273 similar samples on MalwareBazaar
TLSH T11944120697D20D73CE21CA3556B2FBFAFFFB92C902A80D578B585FD5A89265345003A3
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
179
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/205385/
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.1785.21212.3016.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a file
Creating a window
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
60%
Tags:
formbook nemesis overlay packed
Link:
https://www.filescan.io/uploads/618ef62d3edf00a722d10788/reports/c03cd1cd-f3b6-43d3-9d17-d37d9aac5896/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/6c584324-4b1d-4909-a165-c608944ad56a
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/888444
Signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
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 submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
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 virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 520917 Sample: Prince_Silvero_S.A.00023121.exe Startdate: 13/11/2021 Architecture: WINDOWS Score: 100 32 www.984561.com 2->32 42 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 4 other signatures 2->48 11 Prince_Silvero_S.A.00023121.exe 17 2->11         started        signatures3 process4 file5 30 C:\Users\user\AppData\Local\...\fwjmmbxv.dll, PE32 11->30 dropped 60 Tries to detect virtualization through RDTSC time measurements 11->60 62 Injects a PE file into a foreign processes 11->62 15 Prince_Silvero_S.A.00023121.exe 11->15         started        signatures6 process7 signatures8 64 Modifies the context of a thread in another process (thread injection) 15->64 66 Maps a DLL or memory area into another process 15->66 68 Sample uses process hollowing technique 15->68 70 Queues an APC in another process (thread injection) 15->70 18 explorer.exe 15->18 injected process9 dnsIp10 34 cloudbreakhq.com 15.197.142.173, 49817, 80 TANDEMUS United States 18->34 36 www.suwei8.com 156.237.230.145, 49844, 80 DXTL-HKDXTLTseungKwanOServiceHK Seychelles 18->36 38 8 other IPs or domains 18->38 50 System process connects to network (likely due to code injection or exploit) 18->50 22 systray.exe 12 18->22         started        signatures11 process12 dnsIp13 40 www.nianlun.wiki 22->40 52 Self deletion via cmd delete 22->52 54 Modifies the context of a thread in another process (thread injection) 22->54 56 Maps a DLL or memory area into another process 22->56 58 Tries to detect virtualization through RDTSC time measurements 22->58 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/a4b5237de09448f0adfe3cf6838fad36eaaeb192634bf0ea71bd525699c02dff/
Threat name:
Win32.Trojan.FormBook
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Status:
Malicious
First seen:
2021-11-12 21:37:51 UTC
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=us2sg7pasrepblp6ht3ihd5ng3vk5mmsmnf7b2trxvjfngoafx7q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
26506e7d3f4821066fc1989a5c79afb4d1a316aa428f9e4a920644d93a80b495
Formbook
64a668add3d7f3bbcc0ef6acb25529c70df773d74e7e17a4a8fd8c95e81ee8bd
Formbook
7384a61fc69ce24610f7c4658c2ef8786c4cdc5d6ad6b33d1a9f506d6b6388d3
Formbook
88c841869430e07bb9b80e52d61d4f013c6bd8753b06807b411a428f09669c33
Formbook
ac4a0328d512526f20122f0399d557b1334f3b2ac264d9e749d6d2788e956b2e
Formbook
ae55ee08f18b57a38a47ed9bc161b7833e35c31b014e8579ae904a2d4d7c63e3
Formbook
b503be7988f66c2820e5f9a13b6e53ba9b8d14011069c6c809065cf08463e22b
Formbook
d78094f3b6eac87e2d4249671bdc4e044afb31e2e78aac8f2db7186c6d5b6db1
Formbook
dae6ba220bb0a34de731b57965753391343bfe96f9f3fa4fea48102d3377ccf7
Formbook
e58d5730458adae5d62d1438958b3ee887b36f94160f5452cd81665ab4913d7a
Formbook
+ 11'263 additional samples on MalwareBazaar
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader campaign:dgt9 loader rat suricata
Link:
https://tria.ge/reports/211112-2999habdbp/
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
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Loads dropped DLL
Blocklisted process makes network request
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.discountaquarium.com/dgt9/
Unpacked files
SH256 hash:
a4b5237de09448f0adfe3cf6838fad36eaaeb192634bf0ea71bd525699c02dff
MD5 hash:
43c6e39b238fd77c8bfb7f3178b47ebc
SHA1 hash:
2dcb9511d7912aa203d42adee4e91f61951ca832
Link:
https://www.unpac.me/results/658a28f7-5977-41fc-81b6-2630d3bcd576/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/a4b5237de094/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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/205385/

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