MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259. 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: 16


Intelligence 16 IOCs YARA 14 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259
SHA3-384 hash: 0277eb972a3bc2cfd0d90d1e485827ab0b837465c4e0ef942ffaf06e5748a8d922338a4397e7f2585316aedc03de597d
SHA1 hash: a25c29ed64525d3dc689a07c9c600140b1f8ecc8
MD5 hash: 860bcfadaa3d4ddd681fb78d6cd4b79c
humanhash: friend-autumn-crazy-papa
File name:file
Download: download sample
Signature Tofsee
Create hunting rule
File size:271'360 bytes
First seen:2023-10-12 15:47:35 UTC
Last seen:2023-10-12 16:53:30 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 88436ff6acbe52a381a5371266c10c19 (2 x Smoke Loader, 2 x Tofsee, 2 x Stealc)
ssdeep 3072:vBNJvQqnIPUE6ZeTQ7ur1TvIK+KHc4ipXtk8uO+zhzm:pDQqnIPUECesqrxIihwtkz
TLSH T16244CF123A90C472D0636E365870C5956F3BFCE2A57581CB37A83F2E9E326D09A75B13
TrID 37.3% (.EXE) Win64 Executable (generic) (10523/12/4)
17.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
16.0% (.EXE) Win32 Executable (generic) (4505/5/1)
7.3% (.ICL) Windows Icons Library (generic) (2059/9)
7.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 70d0d7d8d2d5d2dd (1 x Tofsee)
Reporter andretavare5
Tags:exe Tofsee


Avatar
andretavare5
Sample downloaded from http://176.113.115.84:8080/4.php

Intelligence

File Origin
# of uploads :
4
# of downloads :
309
Origin country :
US US
Vendor Threat Intelligence
Malware family:
tofsee
Create hunting rule
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2023-10-12 15:51:06 UTC
Tags:
tofsee loader botnet miner sinkhole
Link:
https://app.any.run/tasks/bb4fa0c2-59d1-418f-ba6c-89ce240514cb

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Grum
Create hunting rule
Link:
https://www.capesandbox.com/analysis/453911/
Detection(s):
SecuriteInfo.com.Win32.TrojanX-gen.8058.871.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a file
Launching the process to change the firewall settings
Creating a process from a recently created file
Creating a service
Launching a service
Launching the default Windows debugger (dwwin.exe)
Sending a custom TCP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun for a service
Gathering data
Verdict:
No Threat
Threat level:
  10/10
Confidence:
100%
Tags:
greyware
Link:
https://www.filescan.io/uploads/65281533a29a700213a0b3da/reports/16bb7eb8-8b0a-4cf1-a217-5049dfd8d261/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259
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.
Malware family:
Tofsee
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/2e3c982c-b1e8-421d-8680-476759139582
Result
Threat name:
Tofsee
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1324826
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
Found API chain indicative of debugger detection
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the windows firewall
Multi AV Scanner detection for submitted file
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: 1324826 Sample: file.exe Startdate: 12/10/2023 Architecture: WINDOWS Score: 100 57 vanaheim.cn 2->57 59 microsoft-com.mail.protection.outlook.com 2->59 65 Found malware configuration 2->65 67 Malicious sample detected (through community Yara rule) 2->67 69 Antivirus detection for URL or domain 2->69 71 8 other signatures 2->71 8 gjcnnwxx.exe 2->8         started        11 file.exe 2 2->11         started        14 svchost.exe 6 6 2->14         started        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 85 2 other signatures 8->85 16 svchost.exe 1 8->16         started        20 WerFault.exe 2 8->20         started        49 C:\Users\user\AppData\Local\...\gjcnnwxx.exe, PE32 11->49 dropped 79 Found API chain indicative of debugger detection 11->79 81 Uses netsh to modify the Windows network and firewall settings 11->81 83 Modifies the windows firewall 11->83 22 cmd.exe 1 11->22         started        25 netsh.exe 2 11->25         started        27 cmd.exe 2 11->27         started        33 4 other processes 11->33 29 WerFault.exe 2 14->29         started        31 WerFault.exe 2 14->31         started        signatures6 process7 dnsIp8 51 104.47.53.36, 25, 49722, 49724 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 16->51 53 40.93.207.7, 25, 49781, 49783 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 16->53 55 4 other IPs or domains 16->55 61 System process connects to network (likely due to code injection or exploit) 16->61 63 Deletes itself after installation 16->63 47 C:\Windows\SysWOW64\...\gjcnnwxx.exe (copy), PE32 22->47 dropped 35 conhost.exe 22->35         started        37 conhost.exe 25->37         started        39 conhost.exe 27->39         started        41 conhost.exe 33->41         started        43 conhost.exe 33->43         started        45 conhost.exe 33->45         started        file9 signatures10 process11
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Malicious
First seen:
2023-10-12 15:48:06 UTC
File Type:
PE (Exe)
Extracted files:
11
AV detection:
16 of 23 (69.57%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wnwcys3h4qoxmllygaxlxrrkcjzx5ulxxupfo4vz2ynd2cormjmq._file
Result
Malware family:
xmrig
Create hunting rule
Score:
  10/10
Tags:
family:tofsee family:xmrig evasion miner persistence trojan
Link:
https://tria.ge/reports/231012-s8stdsbh97/
Behaviour
Modifies data under HKEY_USERS
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Launches sc.exe
Drops file in System32 directory
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
Deletes itself
Executes dropped EXE
Creates new service(s)
Modifies Windows Firewall
Sets service image path in registry
XMRig Miner payload
Tofsee
xmrig
Malware Config
C2 Extraction:
vanaheim.cn
jotunheim.name
Unpacked files
SH256 hash:
08770d7f823528bc587cfefe6ec8668871f16187e8220e9404de0bf37d4e9a11
MD5 hash:
8b25aeb453a4761a35fcd06ed1346352
SHA1 hash:
20fb465ce8e765b5971f44bf471d1232df6cfa41
Link:
https://www.unpac.me/results/32812b4c-f057-41e7-8471-1058bdf3c6f5/
SH256 hash:
b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259
MD5 hash:
860bcfadaa3d4ddd681fb78d6cd4b79c
SHA1 hash:
a25c29ed64525d3dc689a07c9c600140b1f8ecc8
Link:
https://www.unpac.me/results/32812b4c-f057-41e7-8471-1058bdf3c6f5/
Malware family:
XMRig
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b36c2c4b67e4/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b36c2c4b67e41d762d78302ebbc62a12737ed177bd1e5772b9d61a3d09d16259

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MALWARE_Win_Grum
Create hunting rule
Author:ditekSHen
Description:Detect Grum spam bot
Rule name:MALWARE_Win_Tofsee
Create hunting rule
Author:ditekSHen
Description:Detects Tofsee
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:tofsee_yhub
Create hunting rule
Author:Billy Austin
Description:Detects Tofsee botnet, also known as Gheg
Rule name:Windows_Trojan_Smokeloader_3687686f
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_Tofsee_26124fe4
Create hunting rule
Author:Elastic Security
Rule name:win_tofsee
Create hunting rule
Author:akrasuski1
Description:Tofsee malware
Reference:https://www.bitsight.com/blog/tofsee-botnet-proxying-and-mining
Rule name:win_tofsee_bot
Create hunting rule
Author:akrasuski1
Description:Tofsee malware
Rule name:win_tofsee_w0
Create hunting rule
Author:akrasuski1
Rule name:yara_template
Create hunting rule

File information

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

  
Dropped by
PrivateLoader
  
Delivery method
Distributed via drive-by
  
URLhaus
https://urlhaus.abuse.ch/url/2674304/
Cape
Cape
https://www.capesandbox.com/analysis/453911/

Comments