MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 eb7d2f18d5fc15bbdeb4da2d297db7ec72004f54a4a6ef8194c23d0651538a3f. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: eb7d2f18d5fc15bbdeb4da2d297db7ec72004f54a4a6ef8194c23d0651538a3f
SHA3-384 hash: 438aaf16e92c7256b23073be453369e6a707f6ff4f2c2d08da7f92454d3cb26cd61945f60be4451b510318815046610d
SHA1 hash: c47d6a6049eaf9686a1582f14470581dcd26d3c3
MD5 hash: a8f5177fee0e96f74efcca064555968a
humanhash: chicken-montana-angel-ten
File name:a8f5177fee0e96f74efcca064555968a.exe
Download: download sample
Signature Tofsee
Create hunting rule
File size:13'976'064 bytes
First seen:2021-05-23 07:59:31 UTC
Last seen:2021-05-23 09:02:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 0afee8684bc07205be6c2f7b21cf3271 (1 x Tofsee)
ssdeep 49152:frH/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA:f
Threatray 124 similar samples on MalwareBazaar
TLSH F9E64B33AAE878B9C130917DF72D7F1149BDE2B6CE3C8033984595D41C136962CE6A9B
Reporter abuse_ch
Tags:exe Tofsee

Intelligence

File Origin
# of uploads :
2
# of downloads :
762
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a8f5177fee0e96f74efcca064555968a.exe
Verdict:
Malicious activity
Analysis date:
2021-05-23 08:02:37 UTC
Tags:
trojan tofsee miner
Link:
https://app.any.run/tasks/38ddff2e-21ac-4c34-a27a-7160ed5283dc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Malware.Raccoon-9861661-1
Create hunting rule

Win.Malware.Bulz-9863357-0
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
Launching a process
Creating a service
Moving a file to the Windows subdirectory
Launching the process to change the firewall settings
Launching a service
Creating a process from a recently created file
Creating a file in the Windows subdirectories
Sending a UDP request
DNS request
Sending a custom TCP request
Connection attempt
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.
Result
Threat name:
Tofsee Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/789436
Signature
Allocates memory in foreign processes
Connects to many ports of the same IP (likely port scanning)
Creates files in alternative data streams (ADS)
Deletes itself after installation
Detected Stratum mining protocol
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 strings related to Crypto-Mining
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
Sigma detected: Copying Sensitive Files with Credential Data
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Svchost Process
Sigma detected: Xmrig
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
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 421832 Sample: 0OvBoFRzgC.exe Startdate: 23/05/2021 Architecture: WINDOWS Score: 100 56 www.google.com.tr 2->56 58 microsoft-com.mail.protection.outlook.com 2->58 60 5 other IPs or domains 2->60 70 Sigma detected: Xmrig 2->70 72 Malicious sample detected (through community Yara rule) 2->72 74 Yara detected Tofsee 2->74 76 10 other signatures 2->76 9 iijupqow.exe 2->9         started        12 0OvBoFRzgC.exe 2 2->12         started        15 svchost.exe 1 2->15         started        17 svchost.exe 1 2->17         started        signatures3 process4 file5 88 Detected unpacking (changes PE section rights) 9->88 90 Detected unpacking (overwrites its own PE header) 9->90 92 Writes to foreign memory regions 9->92 98 2 other signatures 9->98 19 svchost.exe 3 1 9->19         started        52 C:\Users\user\AppData\Local\...\iijupqow.exe, PE32 12->52 dropped 94 Uses netsh to modify the Windows network and firewall settings 12->94 96 Modifies the windows firewall 12->96 24 netsh.exe 3 12->24         started        26 cmd.exe 1 12->26         started        28 cmd.exe 2 12->28         started        30 3 other processes 12->30 signatures6 process7 dnsIp8 62 144.76.108.82, 429, 49763, 49770 HETZNER-ASDE Germany 19->62 64 91.203.5.144, 429, 49760, 49767 VOLIA-ASUA Ukraine 19->64 66 19 other IPs or domains 19->66 50 C:\Windows\SysWOW64\...\systemprofile:.repos, data 19->50 dropped 78 System process connects to network (likely due to code injection or exploit) 19->78 80 Creates files in alternative data streams (ADS) 19->80 82 Deletes itself after installation 19->82 84 Injects a PE file into a foreign processes 19->84 32 svchost.exe 1 19->32         started        36 conhost.exe 24->36         started        38 conhost.exe 26->38         started        40 conhost.exe 28->40         started        42 conhost.exe 30->42         started        44 conhost.exe 30->44         started        46 conhost.exe 30->46         started        file9 86 Detected Stratum mining protocol 62->86 signatures10 process11 dnsIp12 54 masari.miner.rocks 88.198.47.78, 30162, 49790 HETZNER-ASDE Germany 32->54 68 System process connects to network (likely due to code injection or exploit) 32->68 48 conhost.exe 32->48         started        signatures13 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/eb7d2f18d5fc15bbdeb4da2d297db7ec72004f54a4a6ef8194c23d0651538a3f/
Threat name:
Win32.Trojan.ArkeiStealer
Create hunting rule
Status:
Malicious
First seen:
2021-05-23 08:00:28 UTC
AV detection:
32 of 47 (68.09%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5n6s6ggv7qk3xxvu3iwss7nx5rzaat2uusto7amuyi6qmuktri7q._file
Verdict:
malicious
Similar samples:
08304fe1beab272404d9e7441613eeedf83e7e1a3f11118ae8c51065f1b0493e
Tofsee
0c3080ef33448167fc2b858db5ec7b2e4705cb12ca57119088892459ea0cc832
Tofsee
0d3ce00823f9490ec470493500673f945da375ea1dd622e86783829addddf8ad
Tofsee
142e511e48d143633a5f4ab5ae5e1761b3912f5b3202e79ce8c3df71a930f62a
Tofsee
17831d6b96a1d60752b7031cf6307eb2ce6db23204991b7c6411f50f0ee99621
Tofsee
7acd5433727ae9ca0e7a0ca24f70c1d15d354d8162485ad2f0a3f3e76f311914
Tofsee
8d64110a77ed9fe2d9454816668d95ed000442a34bb558ca0447ebd8c08b30ba
Tofsee
8fcb2057bdac3ba88cb811c44a0d79358075525506b1517c3e713aec8d31a666
Tofsee
e013a3489975a5882a5850a9456cdeeaa7cc6dddd8b9de6345e8415d85d2a150
Tofsee
ec026105f3a276efc877a94b232a8ba83eee9be51457296d2f5c6bd5f62583f7
Tofsee
+ 114 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/210523-szy8a82j7e/
Behaviour
Modifies data under HKEY_USERS
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Launches sc.exe
Drops file in System32 directory
Suspicious use of SetThreadContext
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
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/eb7d2f18d5fc15bbdeb4da2d297db7ec72004f54a4a6ef8194c23d0651538a3f

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