MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 18c2c7353431fb6ef10a1a3a8abd5219e4cc4f669c56bf4f68bc6d5e2246a806. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 18c2c7353431fb6ef10a1a3a8abd5219e4cc4f669c56bf4f68bc6d5e2246a806
SHA3-384 hash: cdeebb8fbb1a1bc818d83088684dbfcfab3ff38680051bce4778d0875b62f1ec14c0b3df9d420f46e713c12411cd2330
SHA1 hash: 200bb4862a2b7c6ef00e5d129ec7377bb795790f
MD5 hash: 55945ecdc4f9f09e7392e686764d9355
humanhash: red-oregon-eight-crazy
File name:rWYwknnWR9dImEO.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:666'112 bytes
First seen:2020-10-28 07:52:47 UTC
Last seen:2020-10-28 09:54:03 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 12288:12J803Jq8HcD+jrLqGd0ZhTfqR8Y1IDJG/BZ9zVgeJCZ:g33Uuc6jPd0zzIh1/BPzVgyCZ
TLSH 89E45AB3E34CD8DACDD249F5110E8E630A507F9F91D9A2C988EEB17BC778161E5D0892
Reporter abuse_ch
Tags:exe FormBook Yahoo


Avatar
abuse_ch
Malspam distributing FormBook:

HELO: sonic313-10.consmr.mail.ne1.yahoo.com
Sending IP: 66.163.185.33
From: HASSAN EJIWUNMI <haejiwunmi@yahoo.com>
Subject: FW: Payment Transfer
Attachment: HBNEGO76.rar (contains "rWYwknnWR9dImEO.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
117
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/80327/
Detection(s):
SecuriteInfo.com.Heur.MSIL.Androm.9.8206.11568.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Launching a process
Creating a process with a hidden window
Launching cmd.exe command interpreter
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/514665
Signature
Detected FormBook malware
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Steal Google chrome login data
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 306447 Sample: rWYwknnWR9dImEO.exe Startdate: 28/10/2020 Architecture: WINDOWS Score: 100 41 www.govild.com 2->41 43 govild.com 2->43 51 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 Multi AV Scanner detection for dropped file 2->55 57 10 other signatures 2->57 11 rWYwknnWR9dImEO.exe 6 2->11         started        signatures3 process4 file5 35 C:\Users\user\AppData\...\KWitKcjNPA.exe, PE32 11->35 dropped 37 C:\Users\user\AppData\Local\...\tmp2796.tmp, XML 11->37 dropped 69 Tries to detect virtualization through RDTSC time measurements 11->69 71 Injects a PE file into a foreign processes 11->71 15 rWYwknnWR9dImEO.exe 11->15         started        18 schtasks.exe 1 11->18         started        signatures6 process7 signatures8 75 Modifies the context of a thread in another process (thread injection) 15->75 77 Maps a DLL or memory area into another process 15->77 79 Sample uses process hollowing technique 15->79 81 Queues an APC in another process (thread injection) 15->81 20 explorer.exe 15->20 injected 24 conhost.exe 18->24         started        process9 dnsIp10 45 www.webioff.com 160.122.251.111, 49732, 49734, 49735 NETWORK-TRANSITNetwork-TransitCN South Africa 20->45 47 www.lulubellsgraphicsanddesigns.com 20->47 49 www.688009.xyz 20->49 59 System process connects to network (likely due to code injection or exploit) 20->59 26 chkdsk.exe 18 20->26         started        signatures11 process12 signatures13 61 Detected FormBook malware 26->61 63 Tries to steal Mail credentials (via file access) 26->63 65 Tries to harvest and steal browser information (history, passwords, etc) 26->65 67 3 other signatures 26->67 29 cmd.exe 2 26->29         started        process14 file15 39 C:\Users\user\AppData\Local\Temp\DB1, SQLite 29->39 dropped 73 Tries to harvest and steal browser information (history, passwords, etc) 29->73 33 conhost.exe 29->33         started        signatures16 process17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/18c2c7353431fb6ef10a1a3a8abd5219e4cc4f669c56bf4f68bc6d5e2246a806/
Threat name:
ByteCode-MSIL.Infostealer.Stelega
Create hunting rule
Status:
Malicious
First seen:
2020-10-28 05:11:33 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ddbmonjugh5w54ikdi5ivpksdhsmyt3gtrll6t3ixrwv4isgvada._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/201028-kntgcb4ynn/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies Internet Explorer settings
Suspicious behavior: MapViewOfSection
Suspicious use of SetThreadContext
Reads user/profile data of web browsers
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.trusted-inspections.com/k8b/
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/18c2c7353431fb6ef10a1a3a8abd5219e4cc4f669c56bf4f68bc6d5e2246a806

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: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

File information

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

Malspam

FormBook

rar f62cddb23ef8b2679a8cf132c50411d44b60714e3e21a63b00e0f7e7d3044105

FormBook

Executable exe 18c2c7353431fb6ef10a1a3a8abd5219e4cc4f669c56bf4f68bc6d5e2246a806

(this sample)

  
Dropped by
MD5 839c3c742d25c7109119c5e0f545a465
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 f62cddb23ef8b2679a8cf132c50411d44b60714e3e21a63b00e0f7e7d3044105
Cape
Cape
https://www.capesandbox.com/analysis/80327/

Comments