MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b6bba549cf3117215c67958b942340703dbf010048d3fc7ecea2871d1d4618e7. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b6bba549cf3117215c67958b942340703dbf010048d3fc7ecea2871d1d4618e7
SHA3-384 hash: d7dcbc0349d2ca0e2b9ada0afa12003cbf160ade3e2a12bc0fe3239fb609aa4dfee73224a2c7b4c49ebac4d1e9bcc5be
SHA1 hash: 84546165757a57ea4be153431301d1bd3844d013
MD5 hash: 2f279fe487e7fdb78653123612eedc20
humanhash: cold-ohio-nevada-gee
File name:invoice.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:678'400 bytes
First seen:2020-08-12 18:10:14 UTC
Last seen:2020-08-12 18:51:18 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:kXeWJE2lsoZBbD03+l03+2LwezxLfWItFBFYx+WCKipI4nqhpIKj:IeUE2ldbD03+l03+2LLzxjWIFcCdIpI
Threatray 4'688 similar samples on MalwareBazaar
TLSH 36E4BF6473949973D67A7E31C9B7151403BBBC933939C30E5ACD32CE98313AD4A107AA
Reporter abuse_ch
Tags:Endurance exe FormBook


Avatar
abuse_ch
Malspam distributing FormBook:

HELO: 162-241-204-248.unifiedlayer.com
Sending IP: 162.241.204.249
From: AAVIS PHARMACEUTICALS <info@aavispharma.com>
Reply-To: info@aavispharma.com
Subject: ORDER08122020
Attachment: NEWORDER12082020.IMG (contains "invoice.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
75
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/44391/
Detection(s):
SecuriteInfo.com.RSharedStrings.11014.19598.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
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/423544
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Benign windows process drops PE files
Binary contains a suspicious time stamp
Detected FormBook malware
Initial sample is a PE file and has a suspicious name
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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 AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 264212 Sample: invoice.exe Startdate: 13/08/2020 Architecture: WINDOWS Score: 100 50 www.dussokagi.com 2->50 52 HDRedirect-LB5-1afb6e2973825a56.elb.us-east-1.amazonaws.com 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 Yara detected AntiVM_3 2->56 58 Yara detected FormBook 2->58 60 7 other signatures 2->60 11 invoice.exe 3 2->11         started        signatures3 process4 signatures5 76 Tries to detect virtualization through RDTSC time measurements 11->76 78 Injects a PE file into a foreign processes 11->78 14 invoice.exe 11->14         started        process6 signatures7 80 Modifies the context of a thread in another process (thread injection) 14->80 82 Maps a DLL or memory area into another process 14->82 84 Sample uses process hollowing technique 14->84 86 Queues an APC in another process (thread injection) 14->86 17 explorer.exe 4 6 14->17 injected process8 dnsIp9 44 www.nharry.com 17->44 46 www.evabhika.com 17->46 48 2 other IPs or domains 17->48 38 C:\Users\user\AppData\Local\...\rvc2do44.exe, PE32 17->38 dropped 62 System process connects to network (likely due to code injection or exploit) 17->62 64 Benign windows process drops PE files 17->64 22 wlanext.exe 1 17 17->22         started        26 rvc2do44.exe 3 17->26         started        28 rvc2do44.exe 2 17->28         started        file10 signatures11 process12 file13 40 C:\Users\user\AppData\...\455logrv.ini, data 22->40 dropped 42 C:\Users\user\AppData\...\455logri.ini, data 22->42 dropped 66 Detected FormBook malware 22->66 68 Tries to steal Mail credentials (via file access) 22->68 70 Tries to harvest and steal browser information (history, passwords, etc) 22->70 74 3 other signatures 22->74 30 cmd.exe 1 22->30         started        72 Injects a PE file into a foreign processes 26->72 32 rvc2do44.exe 26->32         started        34 rvc2do44.exe 28->34         started        signatures14 process15 process16 36 conhost.exe 30->36         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b6bba549cf3117215c67958b942340703dbf010048d3fc7ecea2871d1d4618e7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-12 14:14:58 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=w252ksopgelscxdhswfzii2aoa636aiajdj7y7woukdr2hkgddtq._file
Verdict:
malicious
Similar samples:
157ef05047452109ec1552af00806f1469254bc14a5cc942e41180ee82d508a7
FormBook
1d1c9ee0b1adaa5a121fd70d332785395ad22538f9cdc7db44414c1604e28919
FormBook
1e1a825c158fefa17df9237a4be60bc99e1a2a42ded631c8636b6af668b1627f
FormBook
30bbf2043054b92e495bbd55f67e43b8eafce430bf31d8aaa4899385e503cdbe
FormBook
61ce5023167c9a25d41656e8bd12b05769fac072fc6edf6024641ae2c77c8ece
FormBook
7543c6fd163cc67f5bf477b5b583bfca5c094e65c6a5d5dea56e3eeb333b1cad
FormBook
8058effea9cbffe67d3cc69221eda22862586eecdb7c9409b4f9fd6eab6ea04f
FormBook
8a10ba003c94b5e6576d10a0c4bd01cabef6d87e4811e96c1a028e2cde63f414
FormBook
d2b880fc3d1f874e31d23a37b38f75ceb1162c21ce895aec8dbec7f9c952f8f2
FormBook
ea74eac48adf2b19c3102578cb14ee0cd1d51f5e5e1da2fb4ab5b0d3f7e91827
FormBook
+ 4'678 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/200812-8nz68mbch2/
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.ranges-xx.com/cuzy/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b6bba549cf3117215c67958b942340703dbf010048d3fc7ecea2871d1d4618e7

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:RSharedStrings
Create hunting rule
Author:Katie Kleemola
Description:identifiers for remote and gmremote

File information

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

Malspam

FormBook

img 77d401eb243c0c9997895c96437e0707719af984b19ae50633bab957fe8212f5

FormBook

Executable exe b6bba549cf3117215c67958b942340703dbf010048d3fc7ecea2871d1d4618e7

(this sample)

  
Dropped by
MD5 3977ae64532d91a3b1d21835869becf9
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/44391/
  
Dropped by
SHA256 77d401eb243c0c9997895c96437e0707719af984b19ae50633bab957fe8212f5

Comments