MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3
SHA3-384 hash: 563e19a25f3a9bcd5caf3b6d2ca833628132a261e222b2a681ab74b9430d4869e374881e382373bf84aa20545aa07296
SHA1 hash: 2544df38e978f6aaf53ca5ccbb4078befa745351
MD5 hash: 3903301e617641ad7609ca7e09b4bb80
humanhash: carpet-purple-iowa-kansas
File name:t9w7eLEE781llAk.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'333'248 bytes
First seen:2021-12-13 04:24:36 UTC
Last seen:2021-12-13 05:38:44 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:B7YXNa2kita4HBIb6kFgaGvVNfZM58gN8GdvwPJORyyIwU6XOHtEga:hQa2kit4GksxMOPuvwIKX2Oyga
TLSH T15F55120937A49910E56E07B491B1C230CB32BD05B526D32E6AD63EDF7F33BA0DA05667
File icon (PE):PE icon
dhash icon 60b2a2cc0796cc68 (8 x Formbook, 5 x Loki, 4 x SnakeKeylogger)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
170
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
t9w7eLEE781llAk.exe
Verdict:
Malicious activity
Analysis date:
2021-12-13 04:25:34 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/18200d6a-535c-4d66-85c8-7e7c664c4df6

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/213477/
Detection(s):
SecuriteInfo.com.Scr.Malcodegdn30.24908.18824.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61b6cb22d949b30459f34453/reports/cf734d9c-045f-4dce-b378-628eab556939/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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/8b40056c-22bf-4630-9a6e-6a61902e5a2d
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/906126
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Performs DNS queries to domains with low reputation
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Powershell Defender Exclusion
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 538601 Sample: t9w7eLEE781llAk.exe Startdate: 13/12/2021 Architecture: WINDOWS Score: 100 37 Found malware configuration 2->37 39 Malicious sample detected (through community Yara rule) 2->39 41 Antivirus detection for URL or domain 2->41 43 7 other signatures 2->43 10 t9w7eLEE781llAk.exe 4 2->10         started        process3 signatures4 55 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 10->55 57 Adds a directory exclusion to Windows Defender 10->57 59 Tries to detect virtualization through RDTSC time measurements 10->59 61 Injects a PE file into a foreign processes 10->61 13 t9w7eLEE781llAk.exe 10->13         started        16 powershell.exe 25 10->16         started        process5 signatures6 63 Modifies the context of a thread in another process (thread injection) 13->63 65 Maps a DLL or memory area into another process 13->65 67 Sample uses process hollowing technique 13->67 69 Queues an APC in another process (thread injection) 13->69 18 explorer.exe 13->18 injected 22 conhost.exe 16->22         started        process7 dnsIp8 31 www.receipeday1.xyz 173.214.240.15, 49771, 80 SERVEREL-ASUS United States 18->31 33 www.gundummy.com 18->33 35 gundummy.com 34.102.136.180, 49784, 80 GOOGLEUS United States 18->35 45 System process connects to network (likely due to code injection or exploit) 18->45 47 Performs DNS queries to domains with low reputation 18->47 24 msiexec.exe 18->24         started        signatures9 process10 signatures11 49 Self deletion via cmd delete 24->49 51 Modifies the context of a thread in another process (thread injection) 24->51 53 Maps a DLL or memory area into another process 24->53 27 cmd.exe 1 24->27         started        process12 process13 29 conhost.exe 27->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2021-12-13 02:00:04 UTC
AV detection:
2 of 45 (4.44%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qpzddjhbs2yqbcornw4btry37romkq73kxvf5jr25ywrfbp7hxbq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ruje evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/211213-e1y4jsdbd7/
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
Maps connected drives based on registry
Checks BIOS information in registry
Deletes itself
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
Malware Config
C2 Extraction:
http://www.regenerativepatients.com/ruje/
Unpacked files
SH256 hash:
46335ee824965f30ec8ee2d94a06aeb16780bacb4494bad9615107471bc10f64
MD5 hash:
6259b74d509ea12190861138209258d2
SHA1 hash:
8632ea07340fa03c77b1a38a55da1ac41dfc4898
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/7e51f9a6-7cbe-418e-9141-f49fc6e5fcc0/
Parent samples :
5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166
83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3
24a67748af038fb71279d9494318557036d86026598cdaa8822229221b5eac85
SH256 hash:
dc36d16c530087c21705386176fbb80fde7b7cd6b064298ca5c0bb1151e7c785
MD5 hash:
fa7d227afb9ce961d723de5bb0e6c704
SHA1 hash:
874ed46f1cecb3691c6116860f91adde7da819e3
Link:
https://www.unpac.me/results/7e51f9a6-7cbe-418e-9141-f49fc6e5fcc0/
SH256 hash:
bab4591cecd9d8751ec1563e45ede800d52b62acbd0cf29d8897fafad0a711cd
MD5 hash:
d9ff9c640617f9061012173a2c794c13
SHA1 hash:
22a71b91e3066a29fe8bfee9260c331ddee07ce9
Link:
https://www.unpac.me/results/7e51f9a6-7cbe-418e-9141-f49fc6e5fcc0/
SH256 hash:
83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3
MD5 hash:
3903301e617641ad7609ca7e09b4bb80
SHA1 hash:
2544df38e978f6aaf53ca5ccbb4078befa745351
Link:
https://www.unpac.me/results/7e51f9a6-7cbe-418e-9141-f49fc6e5fcc0/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3

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
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe 83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/213477/

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