MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83ef26bdf4b6b513417a97c8997aa2152bc0fb0f0af9d0b30cf6a46d4959ce38. 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: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 83ef26bdf4b6b513417a97c8997aa2152bc0fb0f0af9d0b30cf6a46d4959ce38
SHA3-384 hash: e6c1e291df29fb6783cbfac51f0b34c5744475102ec4e09542bc4d33b7b2c13ea1a031afd21bb83ad7e051438467583d
SHA1 hash: 027fb65eeb5c667fa902df9c22861e753da323ca
MD5 hash: 80252ba2a3af422187e143fccc6ef54e
humanhash: beer-december-mobile-stream
File name:wertyse.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:892'928 bytes
First seen:2020-07-23 11:47:03 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:TAiYTW92iNTJ+mpU2H077df9U4h0y+6J6b1X4eLpy3QP:UVT41DrUjLZ1XyCWA8
Threatray 5'075 similar samples on MalwareBazaar
TLSH 41158D3639828038C53502B5E8789ED2BA3979663751C61E73D713689F13EAFB70522F
Reporter JAMESWT_WT
Tags:FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
94
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/31744/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Win.Malware.Formbook-7399661-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a custom TCP request
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching the default Windows debugger (dwwin.exe)
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/396281
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 250474 Sample: wertyse.exe Startdate: 23/07/2020 Architecture: WINDOWS Score: 100 35 www.argentumcc.info 2->35 41 Malicious sample detected (through community Yara rule) 2->41 43 Antivirus / Scanner detection for submitted sample 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 4 other signatures 2->47 11 wertyse.exe 3 2->11         started        signatures3 process4 file5 33 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 11->33 dropped 55 Writes to foreign memory regions 11->55 57 Allocates memory in foreign processes 11->57 59 Injects a PE file into a foreign processes 11->59 15 AddInProcess32.exe 11->15         started        18 WerFault.exe 28 10 11->18         started        signatures6 process7 file8 61 Modifies the context of a thread in another process (thread injection) 15->61 63 Maps a DLL or memory area into another process 15->63 65 Sample uses process hollowing technique 15->65 67 2 other signatures 15->67 21 explorer.exe 15->21 injected 31 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 18->31 dropped signatures9 process10 dnsIp11 37 www.woodenboxescompany.com 21->37 39 www.balonha.net 21->39 24 raserver.exe 21->24         started        process12 signatures13 49 Modifies the context of a thread in another process (thread injection) 24->49 51 Maps a DLL or memory area into another process 24->51 53 Tries to detect virtualization through RDTSC time measurements 24->53 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/83ef26bdf4b6b513417a97c8997aa2152bc0fb0f0af9d0b30cf6a46d4959ce38/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-07-22 21:51:33 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
26 of 29 (89.66%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qpxsnppuw22rgql2s7ejs6vccuv4b6ypbl45bmym62sg2skzzy4a._file
Verdict:
malicious
Similar samples:
141db63f511b843acf5d8a10f095333482850ed727da867bf39b83694b963ae6
Formbook
2a267254b993ac07447ffa6e2085d2e93f6dafa334c53f65d109d92082d1c350
Formbook
399b70d269ec0e84b66d7de2183866331bff3dd2eff8f32b851927d5944c963a
Formbook
49a63eb1c6fd5d4b22396bb8a8397c3bf124c3f94d104bc2a7a304f4457b4526
Formbook
6678b91ffc7bf3cd0b4624d6f8a3a500d666fd023e43d79727ddd29bd5a7ac19
Formbook
8c2d2663a4c8cf961eb6e47123054f1dd40a7c23bf663762b0f0fc827b6b44f7
Formbook
9e31a9eedd25bd1b57d01f6f9f265cf5d13218f3e3e1866128d061ba5c77c452
Formbook
bfb2fd4412e9cd136a794f61436d597d7d58fb4fd842509dabe7a70344e4fd97
Formbook
dbdfc4a9100fa08d0bb6ca2879febbc5e0db4eca85168dfefb526b584976efaf
Formbook
e3a859708d3e54210dbd7aaf0a2a78e1a11e8e2b3dcd358f91c3aa5091b94bf0
Formbook
+ 5'065 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/200723-vmahleh64j/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Program crash
Program crash
Suspicious use of SetThreadContext
Checks whether UAC is enabled
Loads dropped DLL
Executes dropped EXE
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/83ef26bdf4b6b513417a97c8997aa2152bc0fb0f0af9d0b30cf6a46d4959ce38

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:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Web download

Formbook

Executable exe 83ef26bdf4b6b513417a97c8997aa2152bc0fb0f0af9d0b30cf6a46d4959ce38

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/418322/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/31744/

Comments