MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8bb7375d1d8c2236d2a43e413209831ab50f8599eabdc906143ba7742425fb0c. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8bb7375d1d8c2236d2a43e413209831ab50f8599eabdc906143ba7742425fb0c
SHA3-384 hash: c203b6c46b69d93d4acf2291ae87e66338eca3570f97baa3883437e0308daceb56fb32612c6800445045588477b43363
SHA1 hash: c48af239020924f08e0373cc20c8668144eb4344
MD5 hash: 51e2cd9a509ff03f0f7ba657ff495d67
humanhash: stairway-papa-emma-artist
File name:Yrfvuacmqqfqq7.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'503'232 bytes
First seen:2020-11-14 09:10:53 UTC
Last seen:2020-11-14 10:39:04 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:3V47y5ZPOfSFO6oThuOBUYQ85LBSLRZO7D+gKCKKL2uQ/B+nG1tEhsuti0RCgYTo:S
Threatray 2'917 similar samples on MalwareBazaar
TLSH FA656B3D6D8826A35177F277A4B906C6FEB4618672790C4F02C33A496D4AF123E9734E
Reporter neoxmorpheus1
Tags:FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
159
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.Siggen11.8662.9708.13429.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
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.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/534713
Signature
.NET source code contains very large strings
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 316456 Sample: Yrfvuacmqqfqq7.exe Startdate: 14/11/2020 Architecture: WINDOWS Score: 100 38 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 Multi AV Scanner detection for submitted file 2->42 44 5 other signatures 2->44 10 Yrfvuacmqqfqq7.exe 3 2->10         started        process3 file4 30 C:\Users\user\...\Yrfvuacmqqfqq7.exe.log, ASCII 10->30 dropped 54 Tries to detect virtualization through RDTSC time measurements 10->54 56 Injects a PE file into a foreign processes 10->56 14 Yrfvuacmqqfqq7.exe 10->14         started        signatures5 process6 signatures7 58 Modifies the context of a thread in another process (thread injection) 14->58 60 Maps a DLL or memory area into another process 14->60 62 Sample uses process hollowing technique 14->62 64 Queues an APC in another process (thread injection) 14->64 17 explorer.exe 14->17 injected process8 dnsIp9 32 aas.energy 34.102.136.180, 49735, 49738, 80 GOOGLEUS United States 17->32 34 www.erchomesellers.com 17->34 36 2 other IPs or domains 17->36 46 System process connects to network (likely due to code injection or exploit) 17->46 21 systray.exe 17->21         started        24 autoconv.exe 17->24         started        signatures10 process11 signatures12 48 Modifies the context of a thread in another process (thread injection) 21->48 50 Maps a DLL or memory area into another process 21->50 52 Tries to detect virtualization through RDTSC time measurements 21->52 26 cmd.exe 1 21->26         started        process13 process14 28 conhost.exe 26->28         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8bb7375d1d8c2236d2a43e413209831ab50f8599eabdc906143ba7742425fb0c/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-11-13 11:59:46 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ro3toxi5rqrdnuvehzatecmddk2q7bmz5k64sbquhotxijbf7mga._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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Formbook
+ 2'907 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/201114-z4frzwj49x/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of UnmapMainImage
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.readydesignz.com/yce/
Unpacked files
SH256 hash:
603a6e955bb6078d858f3aced88ca081e3cbe4b907a9066797940ba19edbaa37
MD5 hash:
0f8499f4c7654330f535115ebf7097a2
SHA1 hash:
0a9d60ac668c23c6184b1c1242bf9cf1828068b0
Link:
https://www.unpac.me/results/9c16aa8f-0687-459e-ad19-46ff5f0f718d/
SH256 hash:
83c08f0721c8b0c96e3d6a8f3ccaf5c96fbcc427d574625c34424c3429fefaa1
MD5 hash:
3c5dbcc3bb27e913e14efd8054811373
SHA1 hash:
b0eba9388abddaef9d5aa49ccd5dbab2924cced0
Link:
https://www.unpac.me/results/9c16aa8f-0687-459e-ad19-46ff5f0f718d/
SH256 hash:
5cf0a4759e07e8f85dbc605d55bbd544029258309646c5d19985ca91c11b5454
MD5 hash:
1b042e1cfb2e968f5469a9d4510bf9be
SHA1 hash:
c3f05a09772fd5cc589f47d14be58562fe71e8be
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/9c16aa8f-0687-459e-ad19-46ff5f0f718d/
SH256 hash:
8bb7375d1d8c2236d2a43e413209831ab50f8599eabdc906143ba7742425fb0c
MD5 hash:
51e2cd9a509ff03f0f7ba657ff495d67
SHA1 hash:
c48af239020924f08e0373cc20c8668144eb4344
Link:
https://www.unpac.me/results/9c16aa8f-0687-459e-ad19-46ff5f0f718d/
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

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

Comments