MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 287f4339f14420548856cb9896eda4828e4c0df8c3aa40b8ec68b3a18aa651f5. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 287f4339f14420548856cb9896eda4828e4c0df8c3aa40b8ec68b3a18aa651f5
SHA3-384 hash: eb7d896de00f32ca1c368483cc777d31a764c20d09ec40db4f0cffec1db554f8045f81ddf05290799914fece9c0fa765
SHA1 hash: 4e5be318ac23485a58cbcb7303f163bc30a9f320
MD5 hash: a2a01a5b49e06e84d2d376b37f0f38ab
humanhash: vermont-spaghetti-oranges-california
File name:a2a01a5b49e06e84d2d376b37f0f38ab.exe
Download: download sample
Signature Tofsee
Create hunting rule
File size:15'340'032 bytes
First seen:2021-06-08 06:02:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 6e610c05388ce84123d90086ecb30c0d (1 x Tofsee)
ssdeep 6144:pdj5J14Q+fzV5PrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrX:j5J1z+rV5
Threatray 150 similar samples on MalwareBazaar
TLSH FFF66D8963E68401F94B27B38BDD4D92B51AFDE3F92BE501239933CFD4BA1A15D01938
Reporter abuse_ch
Tags:exe Tofsee

Intelligence

File Origin
# of uploads :
1
# of downloads :
678
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a2a01a5b49e06e84d2d376b37f0f38ab.exe
Verdict:
Malicious activity
Analysis date:
2021-06-08 06:05:42 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/bb2b128d-5823-4d00-adb1-9f8524a4066f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Dropper.Tofsee-9800793-0
Create hunting rule

Win.Dropper.Tofsee-9800794-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
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 the process to change the firewall settings
Launching a service
Creating a process from a recently created file
Sending a UDP request
DNS request
Connection attempt
Enabling autorun for a service
Connection attempt 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.
Result
Threat name:
Tofsee
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/798488
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes security center settings (notifications, updates, antivirus, firewall)
Creates files in alternative data streams (ADS)
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
Sigma detected: Copying Sensitive Files with Credential Data
Sigma detected: Suspect Svchost Activity
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: 430884 Sample: lEbR9gFgLr.exe Startdate: 08/06/2021 Architecture: WINDOWS Score: 100 54 microsoft-com.mail.protection.outlook.com 2->54 62 Antivirus detection for dropped file 2->62 64 Antivirus / Scanner detection for submitted sample 2->64 66 Multi AV Scanner detection for submitted file 2->66 68 7 other signatures 2->68 8 wnngqoao.exe 2->8         started        11 lEbR9gFgLr.exe 2 2->11         started        14 svchost.exe 2->14         started        16 9 other processes 2->16 signatures3 process4 dnsIp5 76 Detected unpacking (changes PE section rights) 8->76 78 Detected unpacking (overwrites its own PE header) 8->78 80 Writes to foreign memory regions 8->80 88 2 other signatures 8->88 19 svchost.exe 2 1 8->19         started        50 C:\Users\user\AppData\Local\...\wnngqoao.exe, PE32 11->50 dropped 82 Uses netsh to modify the Windows network and firewall settings 11->82 84 Modifies the windows firewall 11->84 24 netsh.exe 3 11->24         started        26 cmd.exe 1 11->26         started        28 cmd.exe 2 11->28         started        32 3 other processes 11->32 86 Changes security center settings (notifications, updates, antivirus, firewall) 14->86 30 MpCmdRun.exe 1 14->30         started        52 127.0.0.1 unknown unknown 16->52 file6 signatures7 process8 dnsIp9 56 lazystax.ru 43.231.4.6, 443, 49728 GIGABIT-MYGigabitHostingSdnBhdMY Malaysia 19->56 58 43.231.4.7, 443 GIGABIT-MYGigabitHostingSdnBhdMY Malaysia 19->58 60 3 other IPs or domains 19->60 48 C:\Windows\SysWOW64\...\systemprofile:.repos, data 19->48 dropped 70 System process connects to network (likely due to code injection or exploit) 19->70 72 Creates files in alternative data streams (ADS) 19->72 74 Deletes itself after installation 19->74 34 conhost.exe 24->34         started        36 conhost.exe 26->36         started        38 conhost.exe 28->38         started        40 conhost.exe 30->40         started        42 conhost.exe 32->42         started        44 conhost.exe 32->44         started        46 conhost.exe 32->46         started        file10 signatures11 process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/287f4339f14420548856cb9896eda4828e4c0df8c3aa40b8ec68b3a18aa651f5/
Threat name:
Win32.Trojan.MintZamg
Create hunting rule
Status:
Malicious
First seen:
2021-06-07 08:22:45 UTC
AV detection:
38 of 46 (82.61%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=fb7ugopriqqfjccwzomjn3neqkheydpyyovebohmncz2dcvgkh2q._file
Verdict:
malicious
Similar samples:
237e4c4b7b31d6fb1cf88cc07d2c846044e87854a04c3850dd9a65970787508f
Tofsee
2f74ba8ea35dd8c4e0f0dbcb6ba06b1bdb2aa1f5966e94592ad1468bb092663b
Tofsee
3e60d1ad0f14c5741b1cc034d406134f893ea0b29dc1c1b48f1d5988de41d42a
Tofsee
5fbaa23d2582ceb705d33ad7256d687e8e6d924dfa2854388069932fabac1650
Tofsee
66d8a58d332aad489374ab5678d81540b2f3c838c2d4078abd99e28fe6a69fb0
Tofsee
693e7898b554e11d83b95c844318c1a3efef345aefa1cd01a3f4d5bcfcbbef12
Tofsee
967692708e762fda8ecb0b971aa06e33bca0b9d97b22ac7ffe8297df40a136dd
Tofsee
9919830976415014ee79a70a30a9831ed5c97207318b976bca2781f8354a1442
Tofsee
ba227cfc4b73372ffcd726cf935645bd691e4e6c084eade585f73e15d1f649aa
Tofsee
bf036cfa9246486e80f39515cba5fcfddbd00e917d88a398ca2d2ac9187a8273
Tofsee
+ 140 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/210608-j5k84dk9sj/
Behaviour
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Launches sc.exe
Suspicious use of SetThreadContext
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:
ca97388dc3a453c2d8f7d3b422812d5c8faa8fb3641b9cb9ef0ed83afa340533
MD5 hash:
17f86b3492f7342d54dc3a89201ffb17
SHA1 hash:
0241e05411c59f1d85d87a8106a0733e0bc903e3
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/1201f70d-76be-4a28-896e-b338a926326f/
SH256 hash:
287f4339f14420548856cb9896eda4828e4c0df8c3aa40b8ec68b3a18aa651f5
MD5 hash:
a2a01a5b49e06e84d2d376b37f0f38ab
SHA1 hash:
4e5be318ac23485a58cbcb7303f163bc30a9f320
Link:
https://www.unpac.me/results/1201f70d-76be-4a28-896e-b338a926326f/
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/287f4339f14420548856cb9896eda4828e4c0df8c3aa40b8ec68b3a18aa651f5

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.

Comments