MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e98090d4d1ad51575355593c7bad1c5481d377ea52c4d726ae5b8ce6b09b4f10. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e98090d4d1ad51575355593c7bad1c5481d377ea52c4d726ae5b8ce6b09b4f10
SHA3-384 hash: 38e820c16111fc3b4d45ca165efd4b743e804450091d9edaa17e362f0dd00cf23d5433fdc733ebbb228e8f61bf9d3eca
SHA1 hash: 74071dbeae10dce0b2c521f2baa7a81219db27d1
MD5 hash: f4928e3bc11c62de6678628f76e0a08b
humanhash: grey-yellow-oscar-venus
File name:kerhdgf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:769'024 bytes
First seen:2020-08-11 11:40:53 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 6144:yBz+EGHOT594gytV0A1L+gNfNgeh3rtdKroo+nbaWArvg172SYD4q5Yha:yqHOT8t6h02eh3pdK8o29dOX5Yh
Threatray 4'426 similar samples on MalwareBazaar
TLSH 62F45C3A6D428035C56502F0D4F86EC3A2293B693B52CD5FA3D643085F135EB772AA9F
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: thinkitweb.gr
Sending IP: 212.129.50.130
From: Penelope Alvarez <toula@elemantoniou.gr>
Subject: Re: Product request from Medigas SRL2
Attachment: Item list.xlsm

FormBook payload URL:
http://scscdvddvbf.cf/temp/kerhdgf.exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
79
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/43304/
Detection(s):
Win.Malware.Formbook-7399661-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
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/418646
Signature
Allocates memory in foreign processes
Detected FormBook malware
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 virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 261629 Sample: kerhdgf.exe Startdate: 11/08/2020 Architecture: WINDOWS Score: 100 43 Malicious sample detected (through community Yara rule) 2->43 45 Yara detected FormBook 2->45 47 Modifies the prolog of user mode functions (user mode inline hooks) 2->47 10 kerhdgf.exe 4 2->10         started        process3 file4 37 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 10->37 dropped 59 Writes to foreign memory regions 10->59 61 Allocates memory in foreign processes 10->61 63 Injects a PE file into a foreign processes 10->63 14 AddInProcess32.exe 10->14         started        17 AddInProcess32.exe 10->17         started        signatures5 process6 signatures7 65 Modifies the context of a thread in another process (thread injection) 14->65 67 Maps a DLL or memory area into another process 14->67 69 Sample uses process hollowing technique 14->69 71 2 other signatures 14->71 19 explorer.exe 14->19 injected 23 WerFault.exe 23 9 17->23         started        process8 dnsIp9 39 southeastiowasteps.com 209.17.116.160, 49750, 80 DEFENSE-NETUS United States 19->39 41 www.southeastiowasteps.com 19->41 49 System process connects to network (likely due to code injection or exploit) 19->49 25 wscript.exe 1 17 19->25         started        signatures10 process11 file12 33 C:\Users\user\AppData\...33Q3logrv.ini, data 25->33 dropped 35 C:\Users\user\AppData\...35Q3logri.ini, data 25->35 dropped 51 Detected FormBook malware 25->51 53 Tries to steal Mail credentials (via file access) 25->53 55 Tries to harvest and steal browser information (history, passwords, etc) 25->55 57 3 other signatures 25->57 29 cmd.exe 1 25->29         started        signatures13 process14 process15 31 conhost.exe 29->31         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/e98090d4d1ad51575355593c7bad1c5481d377ea52c4d726ae5b8ce6b09b4f10/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-11 08:35:55 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5gajbvgrvvivou2vle6hxli4ksa5g57kklcnojvologonme3j4ia._file
Verdict:
malicious
Similar samples:
00983a8176276beea115d21fef7919c49b29b96d78dbc2151cc04cc7d8c95b35
Formbook
3bc2e6f78c3a261a13546f719d6b089dab1730e8f6539d7ab7a319fc3e410270
Formbook
3f86f49f3c2e3583c70385971bdba545c85d8f2d66f8923bf446dde88be3afc0
Formbook
4adb6a21c1056dafc19fe22df99b061d94e25e258aa4ff3c35fb8cc65faa2c17
Formbook
7aaba6dcdbb2649a4beeb5e877f26e4ff90aa1c59cb289620dc0098ec88cc663
Formbook
82a761b4157d1fa4e99dbf36c0f30935b19a1dd9875e330d81a70877aa07bc8a
Formbook
bd3afdd3cda53eebbebcc99b946ff7eb2f972fcf1c5a3a11ffcf633a46f1b853
Formbook
d7083f1007834bbc16f0b6d2ee0e1e2b9e79a04af2a2e21f2d2682c9dff939eb
Formbook
e5bb61ce7666ce9c2fd0245cb13dbb8368d894a767041677c0749438154433fd
Formbook
e99c6ae5a08e119d151f0c28b6b164d98ca6fd24d1d91b6f57bdf40f3d688c91
Formbook
+ 4'416 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat family:formbook
Link:
https://tria.ge/reports/200811-4pmfx3w82s/
Behaviour
Formbook Payload
Formbook family
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/e98090d4d1ad51575355593c7bad1c5481d377ea52c4d726ae5b8ce6b09b4f10

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.

Malspam

Formbook

Excel file xlsm bb1972afed7256922af8f7471f5e9e35f48ae24e302c66c0b1621c7deb499b3e

Formbook

Executable exe e98090d4d1ad51575355593c7bad1c5481d377ea52c4d726ae5b8ce6b09b4f10

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/429216/
  
Dropped by
MD5 92a3a9037ae2b89916b9d6e8aaa6252f
  
Dropped by
SHA256 bb1972afed7256922af8f7471f5e9e35f48ae24e302c66c0b1621c7deb499b3e
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/43304/

Comments