MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7543b3353b4f66e0acd8c5030ef74e9cfa55559994652b8dc88d3a1b2819a31f. 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


Tofsee


Vendor detections: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7543b3353b4f66e0acd8c5030ef74e9cfa55559994652b8dc88d3a1b2819a31f
SHA3-384 hash: 9f8769d4e3f576484e8fe02a7e9c5a6001394facb3c7befc73ab61f9afb4b0f846d9f3a8fb91265e220389e404bad1cf
SHA1 hash: 6eac5093ea9896f1d09df30832661bad42abeb41
MD5 hash: e9e8475ec44c2b9f98c5844d8a2c9aba
humanhash: fanta-network-don-utah
File name:7543b3353b4f66e0acd8c5030ef74e9cfa55559994652b8dc88d3a1b2819a31f
Download: download sample
Signature Tofsee
Create hunting rule
File size:12'702'208 bytes
First seen:2020-11-13 15:54:29 UTC
Last seen:2024-07-24 16:12:55 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 625998b46324c845ea50edad85b63bc7 (9 x Tofsee)
ssdeep 393216:5BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB3:5BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB3
Threatray 76 similar samples on MalwareBazaar
TLSH E2D6A0C923E2C410FD1B77939BD89C87F15AA9E3F97BE1012288339AD5BB1754D41A38
Reporter seifreed
Tags:Tofsee

Intelligence

File Origin
# of uploads :
2
# of downloads :
852
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Win.Malware.Locky-7090183-0
Create hunting rule

Win.Malware.Tofsee-7090196-1
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Moving a file to the Windows subdirectory
Launching a process
Creating a service
Launching a service
Creating a process from a recently created file
Launching the process to change the firewall settings
DNS request
Connection attempt
Enabling autorun for a service
Unauthorized injection to a system process
Adding exclusions to Windows Defender
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:
Tofsee
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/534832
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes security center settings (notifications, updates, antivirus, firewall)
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Drops executables to the windows directory (C:\Windows) and starts them
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Modifies the windows firewall
Multi AV Scanner detection for submitted file
Sigma detected: Suspicious Svchost Process
System process connects to network (likely due to code injection or exploit)
Uses netsh to modify the Windows network and firewall settings
Uses ping.exe to check the status of other devices and networks
Writes to foreign memory regions
Yara detected Tofsee
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 316515 Sample: 53EpftlAdO Startdate: 14/11/2020 Architecture: WINDOWS Score: 100 55 microsoft-com.mail.protection.outlook.com 2->55 63 Antivirus detection for dropped file 2->63 65 Antivirus / Scanner detection for submitted sample 2->65 67 Multi AV Scanner detection for submitted file 2->67 69 8 other signatures 2->69 8 gqdanxay.exe 2->8         started        11 53EpftlAdO.exe 3 2->11         started        14 svchost.exe 2->14         started        16 9 other processes 2->16 signatures3 process4 file5 73 Detected unpacking (changes PE section rights) 8->73 75 Detected unpacking (overwrites its own PE header) 8->75 77 Writes to foreign memory regions 8->77 81 2 other signatures 8->81 18 svchost.exe 1 8->18         started        51 C:\Users\user\AppData\Local\...\gqdanxay.exe, PE32 11->51 dropped 22 cmd.exe 1 11->22         started        24 netsh.exe 3 11->24         started        26 cmd.exe 1 11->26         started        30 4 other processes 11->30 79 Changes security center settings (notifications, updates, antivirus, firewall) 14->79 28 MpCmdRun.exe 1 14->28         started        signatures6 process7 dnsIp8 57 103.248.137.133, 465 DNC-ASDimensionNetworkCommunicationLimitedHK Hong Kong 18->57 59 111.121.193.242, 465 CHINANET-BACKBONENo31Jin-rongStreetCN China 18->59 61 microsoft-com.mail.protection.outlook.com 104.47.53.36, 25, 49721 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 18->61 71 System process connects to network (likely due to code injection or exploit) 18->71 32 PING.EXE 1 22->32         started        35 conhost.exe 22->35         started        37 conhost.exe 24->37         started        39 conhost.exe 26->39         started        41 conhost.exe 28->41         started        43 conhost.exe 30->43         started        45 conhost.exe 30->45         started        47 conhost.exe 30->47         started        49 conhost.exe 30->49         started        signatures9 process10 dnsIp11 53 127.0.0.1 unknown unknown 32->53
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7543b3353b4f66e0acd8c5030ef74e9cfa55559994652b8dc88d3a1b2819a31f/
Threat name:
Win32.Backdoor.Tofsee
Create hunting rule
Status:
Malicious
First seen:
2020-11-13 16:03:02 UTC
AV detection:
28 of 29 (96.55%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ovb3gnj3j5toblgyyubq552ott5fkvmzsrssxdoiru5bwkazumpq._file
Verdict:
malicious
Similar samples:
09c91b6b998efbd20f56399190c3873286ebd92d2323ef4a313e970ff3492087
Tofsee
0e4e902b30a99c179a586c7fd3e27b1fe0b7f1cf5397cb4ee9f056a4fa547b5b
Tofsee
3e60d1ad0f14c5741b1cc034d406134f893ea0b29dc1c1b48f1d5988de41d42a
Tofsee
575e8f38cfb2015941a558082390e1f02c7318bd0d6b82261065bd3839123bf8
Tofsee
5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650
Tofsee
66d8a58d332aad489374ab5678d81540b2f3c838c2d4078abd99e28fe6a69fb0
Tofsee
6b2eb0949d00fd9c42298b9458a56ce9dd189f72b2e30b76306d7f0f0ffc6819
Tofsee
849fd8ff6b9721a75a89c640d4ec6532a4078bf22e24af896daeda1bb1a87dae
Tofsee
ba227cfc4b73372ffcd726cf935645bd691e4e6c084eade585f73e15d1f649aa
Tofsee
cdbda4f45e8cb4d6117bcd21304c66a78bcb73f840f48d8e523e76e5b0b57582
Tofsee
+ 66 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
evasion persistence trojan
Link:
https://tria.ge/reports/201113-5eab992knx/
Behaviour
Suspicious use of WriteProcessMemory
Launches sc.exe
Modifies service
Suspicious use of SetThreadContext
Deletes itself
Creates new service(s)
Executes dropped EXE
Modifies Windows Firewall
Windows security bypass
Unpacked files
SH256 hash:
7543b3353b4f66e0acd8c5030ef74e9cfa55559994652b8dc88d3a1b2819a31f
MD5 hash:
e9e8475ec44c2b9f98c5844d8a2c9aba
SHA1 hash:
6eac5093ea9896f1d09df30832661bad42abeb41
Link:
https://www.unpac.me/results/a0530896-2d77-45f4-adfa-e1b42acbcea8/
SH256 hash:
d2fed41cf75b50ae31022e64908acde69f89b4cf156454012d8e6849864c87b2
MD5 hash:
280ce9444403f9707076dbd903c5225e
SHA1 hash:
03f4ddacccd80846253e7651dc33ddf56e52565b
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/a0530896-2d77-45f4-adfa-e1b42acbcea8/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:win_tofsee_w0
Create hunting rule
Author:akrasuski1

File information

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

  
Delivery method
Other

Comments