MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 23b880c48fec41fa4fc337f0ecb3d9cd5ee8f71cd45448049a35bbcb85bb01f5. 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: 23b880c48fec41fa4fc337f0ecb3d9cd5ee8f71cd45448049a35bbcb85bb01f5
SHA3-384 hash: 18bf49cfc9f084e463abbba2d7cc80f59f37bd768528cb0759cc244c3842d75ee52d352603f914bdef39b0cbfebcb198
SHA1 hash: c7af2c03cba0571142819fa80246bc3113a04e86
MD5 hash: 53d92f646a290925a13187dbb1d1364b
humanhash: april-ack-monkey-beryllium
File name:chrisx.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:448'512 bytes
First seen:2020-09-10 13:23:14 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:5/bLmSgAj/Bv+jKUi3QYP4LoIR6qwjxfEGf5g5hXp:5aSDj/B6KU2PJep
TLSH CF942364972C0B2FE6EE6DB4C86F78648766F6415453F3890C41D370284A7F64DA2EF2
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
199
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/58398/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Unauthorized injection to a recently created process
Creating a file
Launching a process
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
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/463202
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Creates an undocumented autostart registry key
Detected FormBook malware
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
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 283999 Sample: chrisx.exe Startdate: 10/09/2020 Architecture: WINDOWS Score: 100 36 www.sam-city.xyz 2->36 44 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Antivirus / Scanner detection for submitted sample 2->48 50 6 other signatures 2->50 11 chrisx.exe 3 2->11         started        signatures3 process4 file5 34 C:\Users\user\AppData\...\chrisx.exe.log, ASCII 11->34 dropped 62 Tries to detect virtualization through RDTSC time measurements 11->62 15 chrisx.exe 11->15         started        signatures6 process7 signatures8 64 Modifies the context of a thread in another process (thread injection) 15->64 66 Maps a DLL or memory area into another process 15->66 68 Sample uses process hollowing technique 15->68 70 Queues an APC in another process (thread injection) 15->70 18 explorer.exe 15->18 injected process9 dnsIp10 38 www.11205walrondave.com 162.209.66.24, 49745, 49746, 49747 RMH-14US United States 18->38 40 etrmgroup.net 34.102.136.180, 49729, 80 GOOGLEUS United States 18->40 42 3 other IPs or domains 18->42 52 System process connects to network (likely due to code injection or exploit) 18->52 22 rundll32.exe 1 17 18->22         started        signatures11 process12 file13 30 C:\Users\user\AppData\...\60Plogrv.ini, data 22->30 dropped 32 C:\Users\user\AppData\...\60Plogri.ini, data 22->32 dropped 54 Detected FormBook malware 22->54 56 Creates an undocumented autostart registry key 22->56 58 Tries to steal Mail credentials (via file access) 22->58 60 4 other signatures 22->60 26 cmd.exe 1 22->26         started        signatures14 process15 process16 28 conhost.exe 26->28         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/23b880c48fec41fa4fc337f0ecb3d9cd5ee8f71cd45448049a35bbcb85bb01f5/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-09-10 04:18:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=eo4ibrep5ra7ut6dg7yozm6zzvpor5y42rkeqbe2gw54xbn3ah2q._file
Verdict:
unknown
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/200910-klfzh9nb3j/
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 SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.sam-city.xyz/c8e/
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/23b880c48fec41fa4fc337f0ecb3d9cd5ee8f71cd45448049a35bbcb85bb01f5

File information

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

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/58398/
  
URLhaus
https://urlhaus.abuse.ch/url/457849/

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