MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650. 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: 9


Intelligence 9 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650
SHA3-384 hash: 4cfcc43beea6458e1fdfad7e865a3a48b324822267244ebd04deefb2b92848e39364528ae92c9a84efc62a9e69e2a36b
SHA1 hash: 799f1bcfd9da458b4a7deef70ee57e9261f8e4a3
MD5 hash: 34945d2976eed2d45ecaec8cd42f0ff7
humanhash: one-ink-mango-berlin
File name:5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650
Download: download sample
Signature Tofsee
Create hunting rule
File size:13'115'392 bytes
First seen:2020-11-13 15:49:06 UTC
Last seen:2024-07-24 14:58:02 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 69397fa573f6c25e21ed26d886ae7811 (2 x Tofsee)
ssdeep 196608:Qbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb:
Threatray 77 similar samples on MalwareBazaar
TLSH 0CD602CF3D066497F96A88786663095A905AF98510D017FB8F002EF9DF893908FF3A5D
Reporter seifreed
Tags:Tofsee

Intelligence

File Origin
# of uploads :
2
# of downloads :
845
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
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/536531
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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
Multi AV Scanner detection for submitted file
PE file has a writeable .text section
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: 317365 Sample: ukJaFvai2M Startdate: 15/11/2020 Architecture: WINDOWS Score: 100 45 microsoft-com.mail.protection.outlook.com 2->45 55 Antivirus detection for dropped file 2->55 57 Antivirus / Scanner detection for submitted sample 2->57 59 Multi AV Scanner detection for submitted file 2->59 61 8 other signatures 2->61 8 drshjytb.exe 2->8         started        11 ukJaFvai2M.exe 2 2->11         started        14 svchost.exe 9 1 2->14         started        17 3 other processes 2->17 signatures3 process4 dnsIp5 67 Detected unpacking (changes PE section rights) 8->67 69 Detected unpacking (overwrites its own PE header) 8->69 71 Writes to foreign memory regions 8->71 73 2 other signatures 8->73 19 svchost.exe 1 8->19         started        43 C:\Users\user\AppData\Local\...\drshjytb.exe, PE32 11->43 dropped 23 netsh.exe 3 11->23         started        25 cmd.exe 1 11->25         started        27 cmd.exe 2 11->27         started        29 3 other processes 11->29 53 127.0.0.1 unknown unknown 14->53 file6 signatures7 process8 dnsIp9 47 43.231.5.6, 465 GIGABIT-MYGigabitHostingSdnBhdMY Malaysia 19->47 49 103.248.137.133, 465 DNC-ASDimensionNetworkCommunicationLimitedHK Hong Kong 19->49 51 2 other IPs or domains 19->51 63 System process connects to network (likely due to code injection or exploit) 19->63 65 Deletes itself after installation 19->65 31 conhost.exe 23->31         started        33 conhost.exe 25->33         started        35 conhost.exe 27->35         started        37 conhost.exe 29->37         started        39 conhost.exe 29->39         started        41 conhost.exe 29->41         started        signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650/
Threat name:
Win32.Trojan.Ymacco
Create hunting rule
Status:
Malicious
First seen:
2020-11-13 15:57:20 UTC
AV detection:
26 of 29 (89.66%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=l65kepjfqlhlobothllsk3lip2hg3esn7iufioeangjs7k5mczia._file
Verdict:
malicious
Similar samples:
237e4c4b7b31d6fb1cf88cc07d2c846044e87854a04c3850dd9a65970787508f
Tofsee
3e60d1ad0f14c5741b1cc034d406134f893ea0b29dc1c1b48f1d5988de41d42a
Tofsee
587f79f301d6ca9ad6a02642cf6ebfbce12b3eaa524ecd67834ca1314447c4da
Tofsee
66d8a58d332aad489374ab5678d81540b2f3c838c2d4078abd99e28fe6a69fb0
Tofsee
9919830976415014ee79a70a30a9831ed5c97207318b976bca2781f8354a1442
Tofsee
af21217ee5523873bc4ee3b262ce06a371a1095abfea9729e3413cf9da1a0cab
Tofsee
ba227cfc4b73372ffcd726cf935645bd691e4e6c084eade585f73e15d1f649aa
Tofsee
bf036cfa9246486e80f39515cba5fcfddbd00e917d88a398ca2d2ac9187a8273
Tofsee
f5c60cf3334fc3093cb2b7b6bcfa480bf87a74b4edd8830b97c1ee3b3e66cefd
Tofsee
fff57207bf2d6326bc580cd9788e36ec52437e472d26d49c015685525415d7ee
Tofsee
+ 67 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
evasion persistence trojan
Link:
https://tria.ge/reports/201113-hscrxhepnn/
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
Sets service image path in registry
Windows security bypass
Unpacked files
SH256 hash:
5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650
MD5 hash:
34945d2976eed2d45ecaec8cd42f0ff7
SHA1 hash:
799f1bcfd9da458b4a7deef70ee57e9261f8e4a3
Link:
https://www.unpac.me/results/a9d3bb4d-a813-4cac-a4b3-cc468f533f62/
SH256 hash:
27ece7f83ffd31f4ceb556c593a045555d679e304ad9b597dfe05e4da7654537
MD5 hash:
abd215cf0d87c292d8640207b3925b9b
SHA1 hash:
5b5e7e6a6f074f2b833cf2d3ff9f4aff75cb157d
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/a9d3bb4d-a813-4cac-a4b3-cc468f533f62/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Tofsee
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650

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