MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea. 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: 17


Intelligence 17 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea
SHA3-384 hash: 42dc4b4cf6d49c3cd37ee18829c19d7673181865a023bddfcb7f59da1f05f15af5def29553b94203455b77f44c44c801
SHA1 hash: 2e9ecce17796c488663c918c6fdb4344766a2e4f
MD5 hash: 40f3453d2187ac3df970dc836377722d
humanhash: golf-triple-ack-nineteen
File name:file
Download: download sample
Signature Tofsee
Create hunting rule
File size:178'176 bytes
First seen:2023-03-21 10:25:26 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 6149c9f35229403fdda7d9d88d405383 (3 x Smoke Loader, 2 x Rhadamanthys, 1 x RedLineStealer)
ssdeep 3072:DFyFCV5CswXoqBrQI7Kwa2SNxaX7q/KMGlOuXJa:DYCVAnofI7Kn2S/q2/5M
TLSH T161049E4393E07C65F4568B729E2EF5F4761FF4508E5AEBDA23486B2F08711A2C6623D0
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 10e4e2d2d0426048 (1 x Tofsee)
Reporter andretavare5
Tags:exe Tofsee


Avatar
andretavare5
Sample downloaded from http://176.113.115.239:8080/4.php

Intelligence

File Origin
# of uploads :
1
# of downloads :
237
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
tofsee
Create hunting rule
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2023-03-21 10:32:39 UTC
Tags:
tofsee
Link:
https://app.any.run/tasks/3ea7042a-bf9a-4b11-b07e-5e86ff7c010b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Tofsee
Create hunting rule
Link:
https://www.capesandbox.com/analysis/376208/
Detection(s):
Win.Dropper.Tofsee-9993376-0
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 service
Creating a process from a recently created file
Sending a custom TCP request
Launching a service
Launching the default Windows debugger (dwwin.exe)
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun for a service
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware lockbit packed tofsee vidar
Link:
https://www.filescan.io/uploads/6419863b3b01ade53e6ffba3/reports/2e5910f8-a778-4fc8-a3f9-7858266addec/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea
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/9e89cdc6-24c9-45c9-9b44-cc69d4cfb6d9
Result
Threat name:
Tofsee
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1198395
Signature
Allocates memory in foreign processes
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
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 domain / URL
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: 831303 Sample: file.exe Startdate: 21/03/2023 Architecture: WINDOWS Score: 100 43 microsoft-com.mail.protection.outlook.com 2->43 49 Multi AV Scanner detection for domain / URL 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 5 other signatures 2->55 8 uisjezur.exe 2->8         started        11 file.exe 2 2->11         started        signatures3 process4 file5 57 Detected unpacking (changes PE section rights) 8->57 59 Detected unpacking (overwrites its own PE header) 8->59 61 Writes to foreign memory regions 8->61 67 2 other signatures 8->67 14 svchost.exe 1 8->14         started        41 C:\Users\user\AppData\Local\...\uisjezur.exe, PE32 11->41 dropped 63 Uses netsh to modify the Windows network and firewall settings 11->63 65 Modifies the windows firewall 11->65 18 cmd.exe 1 11->18         started        21 netsh.exe 3 11->21         started        23 cmd.exe 2 11->23         started        25 3 other processes 11->25 signatures6 process7 dnsIp8 45 muspelheim.be 176.124.193.51, 443, 49698, 49699 GULFSTREAMUA Russian Federation 14->45 47 microsoft-com.mail.protection.outlook.com 40.93.212.0, 25, 49697 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 14->47 69 System process connects to network (likely due to code injection or exploit) 14->69 71 Deletes itself after installation 14->71 39 C:\Windows\SysWOW64\...\uisjezur.exe (copy), PE32 18->39 dropped 27 conhost.exe 18->27         started        29 conhost.exe 21->29         started        31 conhost.exe 23->31         started        33 conhost.exe 25->33         started        35 conhost.exe 25->35         started        37 conhost.exe 25->37         started        file9 signatures10 process11
Detection:
tofsee
Create hunting rule
Link:
https://mwdb.cert.pl/sample/37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea/
Threat name:
Win32.Trojan.RedLineStealer
Create hunting rule
Status:
Malicious
First seen:
2023-03-16 23:02:38 UTC
File Type:
PE (Exe)
Extracted files:
26
AV detection:
27 of 39 (69.23%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=g76sus26w2gzxjqrk3ll7azz2ohiqem2q666wxca6wit27foxxva._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/230321-mghw8abg4v/
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
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
Windows security bypass
xmrig
Malware Config
C2 Extraction:
muspelheim.be
jotunheim.name
Unpacked files
SH256 hash:
62cfa311630d5af166880c3edf186c1219d92b81e620c7d46127833b8257015f
MD5 hash:
fb91dcb0dfed2c7fd2b999b471d9ae6e
SHA1 hash:
3ee3be114930481b83e5cd11c38079ad1ae8418f
Detections:
Tofsee
Create hunting rule
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/2a68eacc-b0ac-4603-8bcb-e2c0c1b2d3aa/
Parent samples :
0557d5383704424bd7ca3b63b948e3bf47f869f5bf782142deab956c27f447f5
37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea
SH256 hash:
37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea
MD5 hash:
40f3453d2187ac3df970dc836377722d
SHA1 hash:
2e9ecce17796c488663c918c6fdb4344766a2e4f
Link:
https://www.unpac.me/results/2a68eacc-b0ac-4603-8bcb-e2c0c1b2d3aa/
Malware family:
XMRig
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/37fd2a4b5eb6/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/37fd2a4b5eb68d9ba61156d6bf8339d38e88119a87bdeb5c40f5913d7caebdea

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:Detect_Tofsee
Create hunting rule
Author:@malgamy12
Description:Detect_Tofsee
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:tofsee_yhub
Create hunting rule
Author:Billy Austin
Description:Detects Tofsee botnet, also known as Gheg
Rule name:Windows_Trojan_Tofsee_26124fe4
Create hunting rule
Author:Elastic Security
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/2513471/
Cape
Cape
https://www.capesandbox.com/analysis/376208/

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