MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b35f4af1c1d3a56b88741a1730c356a5602882505fcfe0bc089ad6e46cb0af36. 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: 15


Intelligence 15 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b35f4af1c1d3a56b88741a1730c356a5602882505fcfe0bc089ad6e46cb0af36
SHA3-384 hash: d4cc7c157b68b535cf6a2b5360a46297ccfa80887aa036727f1e980541bc2c08faae3e005ecec294ca89cb231e1a8c29
SHA1 hash: 8f601180bd7f1b8f4497853d119908579fcf6685
MD5 hash: 55e49cbe8830e97f9aec9e70d4380d46
humanhash: minnesota-washington-green-uncle
File name:55e49cbe8830e97f9aec9e70d4380d46.exe
Download: download sample
Signature Tofsee
Create hunting rule
File size:190'976 bytes
First seen:2022-09-24 07:41:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 30398207b07906bcbb9d1de6bf7262f3 (9 x Smoke Loader, 6 x Stop, 5 x GCleaner)
ssdeep 3072:zaOskELeWDgx5CnLEXv/nO/Y+c35tOIgtj0jBD83/Pk44x:8LVgGnLEnnbpYI0t
Threatray 347 similar samples on MalwareBazaar
TLSH T15114DFD535B0D03EC4765174B870C6E46ABA9C2245740A0F2B5A7E6F6F302D26EFE34A
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon b2dacabecee6baa6 (148 x RedLineStealer, 145 x Stop, 100 x Smoke Loader)
Reporter abuse_ch
Tags:exe Tofsee

Intelligence

File Origin
# of uploads :
1
# of downloads :
237
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/312800/
Detection(s):
Win.Packed.Crypterx-9954995-0
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 service
Creating a file
Launching the process to change the firewall settings
Searching for synchronization primitives
Creating a process from a recently created file
Launching a service
Launching the default Windows debugger (dwwin.exe)
Enabling autorun for a service
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
anti-vm greyware packed
Link:
https://www.filescan.io/uploads/632eb4db26a88abc7d229b98/reports/6de9401f-d4ae-43ee-aa52-ff07d07c0e72/overview
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/4ee597af-c740-48ba-971c-12edcddf9384
Result
Threat name:
Tofsee
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1076337
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
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
Query firmware table information (likely to detect VMs)
Snort IDS alert for network traffic
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: 708880 Sample: Kkv5nwj6X7.exe Startdate: 24/09/2022 Architecture: WINDOWS Score: 100 51 microsoft-com.mail.protection.outlook.com 2->51 57 Snort IDS alert for network traffic 2->57 59 Multi AV Scanner detection for domain / URL 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 7 other signatures 2->63 8 ejgyrkgv.exe 2->8         started        11 Kkv5nwj6X7.exe 2 2->11         started        14 svchost.exe 2->14         started        16 8 other processes 2->16 signatures3 process4 file5 69 Detected unpacking (changes PE section rights) 8->69 71 Detected unpacking (overwrites its own PE header) 8->71 73 Writes to foreign memory regions 8->73 83 2 other signatures 8->83 18 svchost.exe 1 8->18         started        49 C:\Users\user\AppData\Local\...\ejgyrkgv.exe, PE32 11->49 dropped 75 Uses netsh to modify the Windows network and firewall settings 11->75 77 Modifies the windows firewall 11->77 22 cmd.exe 1 11->22         started        25 netsh.exe 3 11->25         started        27 cmd.exe 2 11->27         started        31 3 other processes 11->31 79 Changes security center settings (notifications, updates, antivirus, firewall) 14->79 29 MpCmdRun.exe 1 14->29         started        81 Query firmware table information (likely to detect VMs) 16->81 signatures6 process7 dnsIp8 53 svartalfheim.top 185.251.89.249, 443, 49710, 49711 SPRINTHOSTRU Russian Federation 18->53 55 microsoft-com.mail.protection.outlook.com 104.47.53.36, 25, 49709 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 18->55 65 System process connects to network (likely due to code injection or exploit) 18->65 67 Deletes itself after installation 18->67 47 C:\Windows\SysWOW64\...\ejgyrkgv.exe (copy), PE32 22->47 dropped 33 conhost.exe 22->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        file9 signatures10 process11
Detection:
tofsee
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b35f4af1c1d3a56b88741a1730c356a5602882505fcfe0bc089ad6e46cb0af36/
Threat name:
Win32.Ransomware.StopCrypt
Create hunting rule
Status:
Malicious
First seen:
2022-09-23 20:18:00 UTC
File Type:
PE (Exe)
Extracted files:
35
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wnpuv4ob2oswxcdudiltbq2wuvqcrasql7h6bpaitlloi3fqv43a._file
Verdict:
malicious
Similar samples:
061a213194d01b8fffbd56195179fa66aab073dc42cb11525226ad58e05131fc
Tofsee
4956127bebe58360b8094d4be53319577fe21dd4e6c0b7336f7eea24d3ed2039
Tofsee
652fae58f7ac9de569b984e21793446e89f97792ebfbc0e3fd49a7586a927d06
Tofsee
71441d638739eed387dff61d6192e9c816f06adaf89e95b611623de941543563
Tofsee
aab8db9599eb5be0582cca71e217d64e595e8e85f9b2e28e91e90fabc113b3d2
Tofsee
de5704d6579398a4b51f7458c105759c46096567661a26bffe1159ef11a16eb8
Tofsee
f16238cbe16b93a141e4e8f026b9ce3ca393f63d78c1b7b6ff2e0ed19f240f5e
Tofsee
+ 337 additional samples on MalwareBazaar
Result
Malware family:
xmrig
Create hunting rule
Score:
  10/10
Tags:
family:tofsee family:xmrig evasion miner persistence trojan
Link:
https://tria.ge/reports/220924-jjqhascbbj/
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
Creates new service(s)
Executes dropped EXE
Modifies Windows Firewall
Sets service image path in registry
XMRig Miner payload
Tofsee
Windows security bypass
xmrig
Malware Config
C2 Extraction:
svartalfheim.top
jotunheim.name
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/5275ef12-91f0-4b27-83da-ef30425483d1
Unpacked files
SH256 hash:
ff61a7b3b030bf91ea6652ac3cd02c0322d99dea711605f5640082f94c654122
MD5 hash:
3c0d9ffa5274d05850052f66406b0a87
SHA1 hash:
31ba7414058e80d226bf8be95206bd2183c86c1b
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/07f5dbc2-6f17-4599-89dd-acfa3b0aa1c9/
Parent samples :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 hash:
b35f4af1c1d3a56b88741a1730c356a5602882505fcfe0bc089ad6e46cb0af36
MD5 hash:
55e49cbe8830e97f9aec9e70d4380d46
SHA1 hash:
8f601180bd7f1b8f4497853d119908579fcf6685
Link:
https://www.unpac.me/results/07f5dbc2-6f17-4599-89dd-acfa3b0aa1c9/
Malware family:
XMRig
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b35f4af1c1d3/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/b35f4af1c1d3a56b88741a1730c356a5602882505fcfe0bc089ad6e46cb0af36

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:MALWARE_Win_Tofsee
Create hunting rule
Author:ditekSHen
Description:Detects Tofsee
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB
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.

Web download

Tofsee

Executable exe b35f4af1c1d3a56b88741a1730c356a5602882505fcfe0bc089ad6e46cb0af36

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2275563/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/312800/

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