MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 55fcd255acc713485fdeec4bcdb099be77c282028f1440cd4a6b881bcf126f81. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 55fcd255acc713485fdeec4bcdb099be77c282028f1440cd4a6b881bcf126f81
SHA3-384 hash: 0f65f0d1d50f4ba9ce813a57e60e9eeab70c3b9f53cb7678b85fac95890d730d4089c868dce3349564cd5ea203cc554f
SHA1 hash: 891f2ad65b02853afd8b4918962c82949b19eed2
MD5 hash: 5904ac721bad2fc0425111ca1819233b
humanhash: california-london-cat-maine
File name:55fcd255acc713485fdeec4bcdb099be77c282028f1440cd4a6b881bcf126f81
Download: download sample
Signature Tofsee
Create hunting rule
File size:10'583'040 bytes
First seen:2020-11-12 13:50:49 UTC
Last seen:2024-07-24 14:31:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 0bdef4d92a94790d7d279561a490c5bb (45 x Tofsee, 26 x CoinMiner)
ssdeep 6144:KbV6VCxCVuydypIozzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzb:A6807dyp
Threatray 47 similar samples on MalwareBazaar
TLSH 76B62A29847B28F5C670107CF78C7B7EAAFD06F49EB4015B689C97C1E4289D454ECAA3
Reporter seifreed
Tags:Tofsee

Intelligence

File Origin
# of uploads :
2
# of downloads :
656
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Win.Trojan.Tofsee-6840338-0
Create hunting rule

Win.Trojan.Tofsee-7102058-0
Create hunting rule

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
Creating a file in the Windows subdirectories
Sending a custom TCP request
Sending an HTTP GET request
Enabling autorun for a service
Sending a TCP request to an infection source
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.
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/55fcd255acc713485fdeec4bcdb099be77c282028f1440cd4a6b881bcf126f81/
Threat name:
Win32.Backdoor.Tofsee
Create hunting rule
Status:
Malicious
First seen:
2020-11-12 13:51:36 UTC
AV detection:
27 of 29 (93.10%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kx6nevnmy4juqx665rf43mezxz34faqcr4kebtkknoebxtysn6aq._file
Verdict:
malicious
Similar samples:
17831d6b96a1d60752b7031cf6307eb2ce6db23204991b7c6411f50f0ee99621
Tofsee
587f79f301d6ca9ad6a02642cf6ebfbce12b3eaa524ecd67834ca1314447c4da
Tofsee
753ace1bff4069f22d20bf3a205b7205e922da38e0c82495fae6b78fd376fc34
Tofsee
8d64110a77ed9fe2d9454816668d95ed000442a34bb558ca0447ebd8c08b30ba
Tofsee
8fcb2057bdac3ba88cb811c44a0d79358075525506b1517c3e713aec8d31a666
Tofsee
90ab735f3e99db675bbc2913b1f34ef7bd72636222ae8b2a2b5e4de01c2e2dea
Tofsee
af21217ee5523873bc4ee3b262ce06a371a1095abfea9729e3413cf9da1a0cab
Tofsee
bb56a44a1aecdb49ea4655e4fb4f5d62b6f44938457b704b6154256a3d387b1b
Tofsee
ca1a4c8a164422ed34687440e215828aac50681c7f9da29ff95d42a28b6af762
Tofsee
d75741013d7ee0596d2fc4d94087a29fe6b8da3700318f011fb6b7e1615eef21
Tofsee
+ 37 additional samples on MalwareBazaar
Result
Malware family:
tofsee
Create hunting rule
Score:
  10/10
Tags:
family:tofsee evasion persistence trojan
Link:
https://tria.ge/reports/201112-d888w5nv62/
Behaviour
Modifies data under HKEY_USERS
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Launches sc.exe
Drops file in System32 directory
Modifies service
Suspicious use of SetThreadContext
Looks up external IP address via web service
Deletes itself
Creates new service(s)
Executes dropped EXE
Modifies Windows Firewall
Sets service image path in registry
Tofsee
Windows security bypass
Unpacked files
SH256 hash:
55fcd255acc713485fdeec4bcdb099be77c282028f1440cd4a6b881bcf126f81
MD5 hash:
5904ac721bad2fc0425111ca1819233b
SHA1 hash:
891f2ad65b02853afd8b4918962c82949b19eed2
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/91f05c6e-69c7-406d-b2b4-377d8a89064d/
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:MAL_XMR_Miner_May19_1
Create hunting rule
Author:Florian Roth
Description:Detects Monero Crypto Coin Miner
Reference:https://www.guardicore.com/2019/05/nansh0u-campaign-hackers-arsenal-grows-stronger/
Rule name:MINER_monero_mining_detection
Create hunting rule
Author:Christiaan Beek | McAfee ATR Team
Description:Monero mining software
Rule name:win_tofsee_w0
Create hunting rule
Author:akrasuski1
Rule name:XMRIG_Miner
Create hunting rule
Rule name:XMRIG_Monero_Miner
Create hunting rule
Author:Florian Roth
Description:Detects Monero mining software
Reference:https://github.com/xmrig/xmrig/releases

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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