MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 41fb70f36b56d60a096ac2a89d7d9d2e6c75cf7725a75fd93ffebfcaabcb8e04. 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: 8


Intelligence 8 IOCs YARA 8 File information Comments
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SHA256 hash: 41fb70f36b56d60a096ac2a89d7d9d2e6c75cf7725a75fd93ffebfcaabcb8e04
SHA3-384 hash: a2cf2298c6519a86974bb98ea8d58d03968ec7d44be8ee468275805375ba1b314c7a54ca33652f41ace2b5600ce5ee39
SHA1 hash: ad5fa359595086f7b392d076d0bb2484953ad698
MD5 hash: bdc23313284ed521f0e5523e79a46452
humanhash: table-harry-orange-hot
File name:PO36782110.xll
Download: download sample
Signature Formbook
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File size:3'584 bytes
First seen:2021-06-14 06:05:08 UTC
Last seen:2021-06-14 06:48:34 UTC
File type:DLL dll
MIME type:application/x-dosexec
imphash d4e6ea9ec0efe39b1cb7664384899294 (2 x Formbook)
ssdeep 24:ZHGStJAqf6vt3XkDyv30NP7HHAW5loW9xqDWSHMRvrBL/AkS:ZvtJz6lq23ePj5loW9xqvwvrBLzS
TLSH C371666213F0C0F1D15827711D939709D57AB2A0EB7667343BA07A1F2C7B551287DB47
Reporter lowmal3
Tags:dll FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
87
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.DownLoader.origin.24477.20843.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/74c4d265-10c9-40b2-adcf-db854cf58952
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/801529
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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
Office process drops PE file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: MS Office Product Spawning Exe in User Dir
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
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 433925 Sample: PO36782110.xll Startdate: 14/06/2021 Architecture: WINDOWS Score: 100 52 Found malware configuration 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 Antivirus / Scanner detection for submitted sample 2->56 58 11 other signatures 2->58 8 EXCEL.EXE 22 26 2->8         started        12 explorer.exe 2->12         started        process3 dnsIp4 34 www.esportesht.com.br 8->34 36 esportesht.com.br 162.241.2.66, 49731, 80 OIS1US United States 8->36 28 C:\Users\user\AppData\...\okoro4334567.exe, PE32 8->28 dropped 30 C:\Users\user\AppData\Local\...\so[1].exe, PE32 8->30 dropped 15 okoro4334567.exe 4 8->15         started        68 Uses netsh to modify the Windows network and firewall settings 12->68 19 netsh.exe 12->19         started        file5 signatures6 process7 file8 32 C:\Users\user\AppData\...\okoro4334567.exe, PE32 15->32 dropped 38 Multi AV Scanner detection for dropped file 15->38 40 Machine Learning detection for dropped file 15->40 42 Writes to foreign memory regions 15->42 50 2 other signatures 15->50 21 okoro4334567.exe 15->21         started        44 Modifies the context of a thread in another process (thread injection) 19->44 46 Maps a DLL or memory area into another process 19->46 48 Tries to detect virtualization through RDTSC time measurements 19->48 24 cmd.exe 1 19->24         started        signatures9 process10 signatures11 60 Multi AV Scanner detection for dropped file 21->60 62 Machine Learning detection for dropped file 21->62 64 Modifies the context of a thread in another process (thread injection) 21->64 66 4 other signatures 21->66 26 conhost.exe 24->26         started        process12
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/41fb70f36b56d60a096ac2a89d7d9d2e6c75cf7725a75fd93ffebfcaabcb8e04/
Threat name:
Win32.Trojan.Generic
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Status:
Suspicious
First seen:
2021-06-09 04:30:24 UTC
AV detection:
18 of 28 (64.29%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ih5xb43lk3lauclkykuj27m5fzwhlt3xewtv7wj77274vk6lryca._file
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210614-jvsmnkp2ln/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.share-event.info/wlns/
Unpacked files
SH256 hash:
41fb70f36b56d60a096ac2a89d7d9d2e6c75cf7725a75fd93ffebfcaabcb8e04
MD5 hash:
bdc23313284ed521f0e5523e79a46452
SHA1 hash:
ad5fa359595086f7b392d076d0bb2484953ad698
Link:
https://www.unpac.me/results/4ddb5f0f-267a-47f1-80a2-1b460a2aa085/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.16
Link:
https://yomi.yoroi.company/submissions/41fb70f36b56d60a096ac2a89d7d9d2e6c75cf7725a75fd93ffebfcaabcb8e04

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:Email_stealer_bin_mem
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Author:James_inthe_box
Description:Email in files like avemaria
Rule name:gen_Excel_xll_addin_suspicious
Create hunting rule
Author:@JohnLaTwC
Description:Detects suspicious XLL add-ins to Excel
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
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Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
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Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Malspam

Formbook

DLL dll 41fb70f36b56d60a096ac2a89d7d9d2e6c75cf7725a75fd93ffebfcaabcb8e04

(this sample)

  
Delivery method
Distributed via e-mail attachment

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