MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 09c91b6b998efbd20f56399190c3873286ebd92d2323ef4a313e970ff3492087. 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: 09c91b6b998efbd20f56399190c3873286ebd92d2323ef4a313e970ff3492087
SHA3-384 hash: d60037985867468ca080f7d0fdee42643dadb3cb56c8f3ed1d623d75e28bcea903631770a96545bab5d467cb53ba7e75
SHA1 hash: d9b9a704f766a6bb5af9c552f433a4917a1e4290
MD5 hash: 014b23c5c59d885973e1173a122e6539
humanhash: missouri-blossom-eighteen-mike
File name:09c91b6b998efbd20f56399190c3873286ebd92d2323ef4a313e970ff3492087
Download: download sample
Signature Tofsee
Create hunting rule
File size:10'576'896 bytes
First seen:2020-11-13 16:04:22 UTC
Last seen:2024-07-24 11:02:18 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash d176a34a8c2fc2d120da2795f60bf60c (4 x Tofsee)
ssdeep 3072:guxtaw40H0QJMuQNYbzF6VMtZWbe1zJ+/sT5:gUtaw40H0Qm0qI+eJT
Threatray 76 similar samples on MalwareBazaar
TLSH 4CB66B1EF35AFC81DF1D633683039A9E03A79227192E7B4B82D9DB9EFC803518557A44
Reporter seifreed
Tags:Tofsee

Intelligence

File Origin
# of uploads :
2
# of downloads :
882
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a service
Launching the process to change the firewall settings
Launching a service
Creating a process from a recently created file
DNS request
Connection attempt
Connecting to a non-recommended domain
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
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/534632
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
Writes to foreign memory regions
Yara detected Tofsee
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 316415 Sample: y3mJO1Mi9G Startdate: 14/11/2020 Architecture: WINDOWS Score: 100 53 microsoft-com.mail.protection.outlook.com 2->53 61 Antivirus detection for dropped file 2->61 63 Antivirus / Scanner detection for submitted sample 2->63 65 Multi AV Scanner detection for submitted file 2->65 67 7 other signatures 2->67 8 cmuhblgu.exe 2->8         started        11 y3mJO1Mi9G.exe 3 2->11         started        14 svchost.exe 2->14         started        16 10 other processes 2->16 signatures3 process4 dnsIp5 71 Detected unpacking (changes PE section rights) 8->71 73 Detected unpacking (overwrites its own PE header) 8->73 75 Writes to foreign memory regions 8->75 79 2 other signatures 8->79 19 svchost.exe 1 8->19         started        49 C:\Users\user\AppData\Local\...\cmuhblgu.exe, PE32 11->49 dropped 23 cmd.exe 1 11->23         started        25 cmd.exe 1 11->25         started        27 cmd.exe 2 11->27         started        33 4 other processes 11->33 77 Changes security center settings (notifications, updates, antivirus, firewall) 14->77 29 MpCmdRun.exe 1 14->29         started        51 127.0.0.1 unknown unknown 16->51 31 conhost.exe 16->31         started        file6 signatures7 process8 dnsIp9 55 103.248.137.133, 443, 49745, 49748 DNC-ASDimensionNetworkCommunicationLimitedHK Hong Kong 19->55 57 111.121.193.242, 443 CHINANET-BACKBONENo31Jin-rongStreetCN China 19->57 59 microsoft-com.mail.protection.outlook.com 104.47.54.36, 25, 49725 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 19->59 69 System process connects to network (likely due to code injection or exploit) 19->69 35 conhost.exe 23->35         started        37 conhost.exe 25->37         started        39 conhost.exe 27->39         started        41 conhost.exe 29->41         started        43 conhost.exe 33->43         started        45 conhost.exe 33->45         started        47 conhost.exe 33->47         started        signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/09c91b6b998efbd20f56399190c3873286ebd92d2323ef4a313e970ff3492087/
Threat name:
Win32.Backdoor.Tofsee
Create hunting rule
Status:
Malicious
First seen:
2020-11-13 16:16:50 UTC
AV detection:
28 of 29 (96.55%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=bherw24zr355ed2whgizbq4hgkdoxwjnemr66srrh2lq742jecdq._file
Verdict:
malicious
Similar samples:
0e4e902b30a99c179a586c7fd3e27b1fe0b7f1cf5397cb4ee9f056a4fa547b5b
Tofsee
3e60d1ad0f14c5741b1cc034d406134f893ea0b29dc1c1b48f1d5988de41d42a
Tofsee
575e8f38cfb2015941a558082390e1f02c7318bd0d6b82261065bd3839123bf8
Tofsee
5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650
Tofsee
6b2eb0949d00fd9c42298b9458a56ce9dd189f72b2e30b76306d7f0f0ffc6819
Tofsee
7543b3353b4f66e0acd8c5030ef74e9cfa55559994652b8dc88d3a1b2819a31f
Tofsee
849fd8ff6b9721a75a89c640d4ec6532a4078bf22e24af896daeda1bb1a87dae
Tofsee
ba227cfc4b73372ffcd726cf935645bd691e4e6c084eade585f73e15d1f649aa
Tofsee
bf036cfa9246486e80f39515cba5fcfddbd00e917d88a398ca2d2ac9187a8273
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-ky8h93rtas/
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:
09c91b6b998efbd20f56399190c3873286ebd92d2323ef4a313e970ff3492087
MD5 hash:
014b23c5c59d885973e1173a122e6539
SHA1 hash:
d9b9a704f766a6bb5af9c552f433a4917a1e4290
Link:
https://www.unpac.me/results/e936bcd4-1ea8-4305-a7d5-b73cd1f5b536/
SH256 hash:
b610250fdc872606843eaff8f37fe6a1215b5bb5d39ab9cabc83b2c8d47ef887
MD5 hash:
7c96121a44f53157809fa95655dd75ed
SHA1 hash:
5d8775a2a38d85005af99b4dfc15a502d5ded65f
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/e936bcd4-1ea8-4305-a7d5-b73cd1f5b536/
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