MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 87491dc3e7e7bee41367da139e5110ca1a9b7bb1ea2c92dd20a8a96c8775fd98. 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: 10


Intelligence 10 IOCs YARA 6 File information Comments
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SHA256 hash: 87491dc3e7e7bee41367da139e5110ca1a9b7bb1ea2c92dd20a8a96c8775fd98
SHA3-384 hash: 9afe3ea5ad446de15b7385e28098beef670fc74acefbb9d0878e031ca29a3d6b38a774441ebfb0753f23bcb12f5457d6
SHA1 hash: 13caf2c984420f49d456ee8f5d255d12b1e2994b
MD5 hash: ee91a329dcc24caa6f613725339032f0
humanhash: florida-oscar-seven-ten
File name:TEKLIF 2707.exe
Download: download sample
Signature Formbook
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File size:474'624 bytes
First seen:2022-07-27 13:44:42 UTC
Last seen:2022-07-27 14:50:11 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'752 x AgentTesla, 19'658 x Formbook, 12'248 x SnakeKeylogger)
ssdeep 12288:OzMJ8hnawzGtOHghjAc4yG80F8qSJEiVJGjZBihNjb9lDBpcLXn:OAy5P9Hgh+yG80F8qvAJEWhhbQ3
TLSH T141A412320DC995EBDC0716F52A20A35C51A9C06AF672BB9630BBF44F7A7AF905C0C971
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
335
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/294645/
Detection(s):
SecuriteInfo.com.W32.AIDetectNet.01.18523.17772.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Forced shutdown of a system process
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62e141b5b3bb70bb32e4c4d6/reports/fc0c3318-8c41-4440-a3a6-fce442705d4b/overview
Result
Verdict:
UNKNOWN
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/c5284678-a155-413d-b30d-7712401e8569
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1041852
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Injects a PE file into a foreign processes
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)
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
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 674346 Sample: TEKLIF 2707.exe Startdate: 27/07/2022 Architecture: WINDOWS Score: 100 31 www.calljanes.com 2->31 33 calljanes.com 2->33 41 Malicious sample detected (through community Yara rule) 2->41 43 Antivirus detection for URL or domain 2->43 45 Antivirus / Scanner detection for submitted sample 2->45 47 6 other signatures 2->47 11 TEKLIF 2707.exe 1 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\TEKLIF 2707.exe.log, ASCII 11->29 dropped 57 Writes to foreign memory regions 11->57 59 Allocates memory in foreign processes 11->59 61 Injects a PE file into a foreign processes 11->61 15 InstallUtil.exe 11->15         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 2 other signatures 15->69 18 explorer.exe 15->18 injected process9 dnsIp10 35 www.santoriniconciergethira.com 217.160.0.21, 49774, 80 ONEANDONE-ASBrauerstrasse48DE Germany 18->35 37 www.talleresmasabrazos.com 18->37 39 custom-proxy.leadpages.net 35.202.21.90, 49779, 80 GOOGLEUS United States 18->39 49 System process connects to network (likely due to code injection or exploit) 18->49 22 cmmon32.exe 18->22         started        signatures11 process12 signatures13 51 Modifies the context of a thread in another process (thread injection) 22->51 53 Maps a DLL or memory area into another process 22->53 55 Tries to detect virtualization through RDTSC time measurements 22->55 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/87491dc3e7e7bee41367da139e5110ca1a9b7bb1ea2c92dd20a8a96c8775fd98/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-07-27 13:35:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=q5er3q7h467oie3h3ijz4uiqzinjw65r5iwjfxjavcuwzb3v7wma._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:kn30 rat spyware stealer trojan
Link:
https://tria.ge/reports/220727-q2dd1saad5/
Behaviour
Enumerates system info in registry
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
Formbook payload
Formbook
Unpacked files
SH256 hash:
87491dc3e7e7bee41367da139e5110ca1a9b7bb1ea2c92dd20a8a96c8775fd98
MD5 hash:
ee91a329dcc24caa6f613725339032f0
SHA1 hash:
13caf2c984420f49d456ee8f5d255d12b1e2994b
Link:
https://www.unpac.me/results/d107e009-896a-4f69-94f4-b0ef42ff1c8e/
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:malware_Formbook_strings
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Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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.

Malspam

Formbook

Executable exe 87491dc3e7e7bee41367da139e5110ca1a9b7bb1ea2c92dd20a8a96c8775fd98

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/294645/

Comments