MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9919830976415014ee79a70a30a9831ed5c97207318b976bca2781f8354a1442. 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: 7


Intelligence 7 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 9919830976415014ee79a70a30a9831ed5c97207318b976bca2781f8354a1442
SHA3-384 hash: b496b69f6203abb700b56ba29269a53116cc05e988160e73471270f35e5820696bbe2d8675d6514d999c267f912cbf80
SHA1 hash: 56508c5c0cef6e11a860c56074946b08c8b8c54a
MD5 hash: 576e7dda26f347a87d7b2f09df9ddb32
humanhash: lima-emma-dakota-rugby
File name:9919830976415014ee79a70a30a9831ed5c97207318b976bca2781f8354a1442
Download: download sample
Signature Tofsee
Create hunting rule
File size:11'138'560 bytes
First seen:2020-11-10 11:37:49 UTC
Last seen:2024-07-24 19:26:55 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 300ecc0abea8945fcd3b21c86c177b56 (8 x Tofsee)
ssdeep 24576:9YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY:
Threatray 29 similar samples on MalwareBazaar
TLSH 9DB6E111A3D98597CE8488F4D3FC6D02487A574F644AC195AEBFEF88FB5E8CB570084A
Reporter seifreed
Tags:Tofsee

Intelligence

File Origin
# of uploads :
2
# of downloads :
95
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Win.Ransomware.Locky-7082424-0
Create hunting rule

Win.Trojan.Barys-7111573-0
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
Deleting of the original file
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/528760
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)
Deletes itself after installation
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
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: 313477 Sample: VjZOzerXqR Startdate: 10/11/2020 Architecture: WINDOWS Score: 100 53 cdn.onenote.net 2->53 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 Yara detected Tofsee 2->67 69 6 other signatures 2->69 8 dhycknez.exe 2->8         started        11 VjZOzerXqR.exe 2 2->11         started        14 svchost.exe 2->14         started        16 11 other processes 2->16 signatures3 process4 dnsIp5 75 Detected unpacking (changes PE section rights) 8->75 77 Detected unpacking (overwrites its own PE header) 8->77 79 Writes to foreign memory regions 8->79 83 2 other signatures 8->83 19 svchost.exe 1 8->19         started        47 C:\Users\user\AppData\Local\...\dhycknez.exe, PE32 11->47 dropped 23 netsh.exe 3 11->23         started        25 cmd.exe 1 11->25         started        27 cmd.exe 2 11->27         started        31 3 other processes 11->31 81 Changes security center settings (notifications, updates, antivirus, firewall) 14->81 29 MpCmdRun.exe 1 14->29         started        49 127.0.0.1 unknown unknown 16->49 51 192.168.2.1 unknown unknown 16->51 file6 signatures7 process8 dnsIp9 57 59.188.74.26, 465 NWT-AS-APASnumberforNewWorldTelephoneLtdHK Hong Kong 19->57 59 103.248.137.133, 465 DNC-ASDimensionNetworkCommunicationLimitedHK Hong Kong 19->59 61 microsoft-com.mail.protection.outlook.com 104.47.54.36, 25, 49701 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 19->61 71 System process connects to network (likely due to code injection or exploit) 19->71 73 Deletes itself after installation 19->73 33 conhost.exe 23->33         started        35 conhost.exe 25->35         started        37 conhost.exe 27->37         started        39 conhost.exe 29->39         started        41 conhost.exe 31->41         started        43 conhost.exe 31->43         started        45 conhost.exe 31->45         started        signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/9919830976415014ee79a70a30a9831ed5c97207318b976bca2781f8354a1442/
Threat name:
Win32.Backdoor.Tofsee
Create hunting rule
Status:
Malicious
First seen:
2020-11-11 00:08:00 UTC
AV detection:
27 of 29 (93.10%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=temygclwifibj3tzu4fdbkmdd3k4s4qhggfzo26ke6a7qnkkcrba._file
Verdict:
malicious
Similar samples:
0c3080ef33448167fc2b858db5ec7b2e4705cb12ca57119088892459ea0cc832
Tofsee
1246f985decb86014d2654d4debbf8f52f945a748b66d0a637494600b9bd2710
Tofsee
17831d6b96a1d60752b7031cf6307eb2ce6db23204991b7c6411f50f0ee99621
Tofsee
587f79f301d6ca9ad6a02642cf6ebfbce12b3eaa524ecd67834ca1314447c4da
Tofsee
59c50a429ba27538378b98c12fc53f34883c9a10c01329d07c3a56de11f09e46
Tofsee
8d64110a77ed9fe2d9454816668d95ed000442a34bb558ca0447ebd8c08b30ba
Tofsee
90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea
Tofsee
af21217ee5523873bc4ee3b262ce06a371a1095abfea9729e3413cf9da1a0cab
Tofsee
ba227cfc4b73372ffcd726cf935645bd691e4e6c084eade585f73e15d1f649aa
Tofsee
f5c60cf3334fc3093cb2b7b6bcfa480bf87a74b4edd8830b97c1ee3b3e66cefd
Tofsee
+ 19 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
evasion persistence trojan
Link:
https://tria.ge/reports/201110-pl1w58jr8s/
Behaviour
Suspicious behavior: EnumeratesProcesses
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
Sets service image path in registry
Windows security bypass
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

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