MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af. 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: 12


Intelligence 12 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af
SHA3-384 hash: ddd561380d98aa30e5cdea6884603f91dc02907c15dc326d5e2b4b0ce570c280bb3c1c3ac1b109cb744fc0116ecfde95
SHA1 hash: 26756ba97d394b418af1a6772a226ff2f2c18b55
MD5 hash: f855c178ba66fef7013303cca97a1a4e
humanhash: steak-robin-hawaii-item
File name:f855c178ba66fef7013303cca97a1a4e.exe
Download: download sample
Signature Tofsee
Create hunting rule
File size:274'944 bytes
First seen:2021-08-25 15:28:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 35372ade599ee63db174ac99307517b7 (9 x RaccoonStealer, 2 x Smoke Loader, 1 x RedLineStealer)
ssdeep 6144:jqs4O6bVLJnq2splH1e24EafBw0+8WloM+nCbVV:1sZL0dfJ4EaZZ+9oM+nmV
Threatray 136 similar samples on MalwareBazaar
TLSH T1EC447C30A691C035F4B311F859BA93BCB53A7AB1673450CB93D526EE4234AE8EC31797
dhash icon ead8a89cc6e68ee0 (43 x RaccoonStealer, 31 x RedLineStealer, 20 x Smoke Loader)
Reporter abuse_ch
Tags:exe Tofsee

Intelligence

File Origin
# of uploads :
1
# of downloads :
659
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f855c178ba66fef7013303cca97a1a4e.exe
Verdict:
Malicious activity
Analysis date:
2021-08-25 15:32:42 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/556d9fc2-17bf-4362-91fc-0a561a9aa64a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/182359/
Detection(s):
Win.Packed.Generic-9888421-0
Create hunting rule

Win.Packed.Generic-9888435-0
Create hunting rule

Win.Packed.Generic-9888451-0
Create hunting rule

Win.Packed.Generic-9888452-0
Create hunting rule

Win.Packed.Generic-9888502-0
Create hunting rule

Win.Packed.Generic-9888526-0
Create hunting rule

Win.Packed.Generic-9888527-0
Create hunting rule

Win.Dropper.Fragtor-9888544-0
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 a service
Creating a process from a recently created file
Launching the process to change the firewall settings
DNS request
Connection attempt
Sending a custom TCP request
Creating a file in the Windows subdirectories
Sending a UDP request
Sending an HTTP GET request
Enabling autorun for a service
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.
Malware family:
Tofsee
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/6091de81-6812-421c-9787-006d800f17e0
Result
Threat name:
Tofsee Xmrig
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/839194
Signature
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Creates files in alternative data streams (ADS)
Deletes itself after installation
Detected Stratum mining protocol
Detected unpacking (changes PE section rights)
Drops executables to the windows directory (C:\Windows) and starts them
Found malware configuration
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
Performs DNS queries to domains with low reputation
Send many emails (e-Mail Spam)
Sigma detected: Copying Sensitive Files with Credential Data
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Svchost Process
Sigma detected: Xmrig
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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: 471622 Sample: Xz2kK8et6i.exe Startdate: 25/08/2021 Architecture: WINDOWS Score: 100 62 pinamail.com 2->62 64 mail2kathy.com 2->64 66 49 other IPs or domains 2->66 78 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->78 80 Sigma detected: Xmrig 2->80 82 Found malware configuration 2->82 84 13 other signatures 2->84 9 gblocnnv.exe 2->9         started        12 Xz2kK8et6i.exe 2 2->12         started        15 svchost.exe 2->15         started        17 7 other processes 2->17 signatures3 process4 dnsIp5 96 Detected unpacking (changes PE section rights) 9->96 98 Writes to foreign memory regions 9->98 100 Allocates memory in foreign processes 9->100 102 Injects a PE file into a foreign processes 9->102 20 svchost.exe 4 1 9->20         started        58 C:\Users\user\AppData\Local\...\gblocnnv.exe, PE32 12->58 dropped 104 Uses netsh to modify the Windows network and firewall settings 12->104 106 Modifies the windows firewall 12->106 25 cmd.exe 1 12->25         started        27 netsh.exe 3 12->27         started        29 cmd.exe 2 12->29         started        33 3 other processes 12->33 31 MpCmdRun.exe 1 15->31         started        60 127.0.0.1 unknown unknown 17->60 file6 signatures7 process8 dnsIp9 72 www.google.co.id 142.250.203.99, 443, 49726, 49745 GOOGLEUS United States 20->72 74 hotmail.com 20->74 76 84 other IPs or domains 20->76 54 C:\Windows\SysWOW64\...\systemprofile:.repos, data 20->54 dropped 86 System process connects to network (likely due to code injection or exploit) 20->86 88 Creates files in alternative data streams (ADS) 20->88 90 Performs DNS queries to domains with low reputation 20->90 94 2 other signatures 20->94 35 svchost.exe 1 20->35         started        56 C:\Windows\SysWOW64\...\gblocnnv.exe (copy), PE32 25->56 dropped 38 conhost.exe 25->38         started        40 conhost.exe 27->40         started        42 conhost.exe 29->42         started        44 conhost.exe 31->44         started        46 conhost.exe 33->46         started        48 conhost.exe 33->48         started        file10 92 Detected Stratum mining protocol 72->92 signatures11 process12 dnsIp13 68 fastpool.xyz 213.91.128.133, 10060, 49737 BTC-ASBULGARIABG Bulgaria 35->68 70 192.168.2.1 unknown unknown 35->70 50 conhost.exe 35->50         started        52 conhost.exe 38->52         started        process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af/
Threat name:
Win32.Exploit.Fragtor
Create hunting rule
Status:
Malicious
First seen:
2021-08-25 15:29:10 UTC
AV detection:
19 of 46 (41.30%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5b5fy4m2y6xzt4khq4zirhk56crhkmk3ikz3tlwmroitgo6zycxq._file
Verdict:
malicious
Similar samples:
07056777e640806a058f582772f441ff608ff7b1f8bd69d20943acf35b266a2d
Tofsee
0c79433c9f2fcc386d54c67d3bf1a0c002d6dd74d32c4888b4a8450f13e7383f
Tofsee
1ae374502df9e63ab3d4b3bc2611b0758f97285c3eb49d58713fd654ed9ab756
Tofsee
2c186a17b4e8362e5ddd55713ff2a680c08792c6a6f84f7cc468db7e843535e1
Tofsee
700f94a34591e321bba41a65fe6ad2d273d245381a64b8733898804c286ce4a8
Tofsee
967692708e762fda8ecb0b971aa06e33bca0b9d97b22ac7ffe8297df40a136dd
Tofsee
cfcb21c8c129c8c2c525ecfac8bd883260eda6038e3991210765e582007451dd
Tofsee
f5c60cf3334fc3093cb2b7b6bcfa480bf87a74b4edd8830b97c1ee3b3e66cefd
Tofsee
+ 126 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/210825-gcqyjqryje/
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
Looks up external IP address via web service
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
Unpacked files
SH256 hash:
5596604c1864dd894c7209cc954a5c57374c0c54a5d0df5d1d4e7e3c5aaf6bd8
MD5 hash:
966d7a43ed4feeb7f8a9eb536e94b7c1
SHA1 hash:
fea8f18b4799df4f2151e4396f5fcac010f06274
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/49e5c20f-3f6c-4d41-9fa4-d906944a4d0e/
Parent samples :
6a6c76468f25ca6d92463cc715fe615b2b449468a85e9c183693d8ea5a70fff1
700f94a34591e321bba41a65fe6ad2d273d245381a64b8733898804c286ce4a8
07056777e640806a058f582772f441ff608ff7b1f8bd69d20943acf35b266a2d
1a233cd70753a0c450148f0df3dc5881ef7b5bc7449a2da7da4bffa7f3d959b4
1ae374502df9e63ab3d4b3bc2611b0758f97285c3eb49d58713fd654ed9ab756
e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af
SH256 hash:
e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af
MD5 hash:
f855c178ba66fef7013303cca97a1a4e
SHA1 hash:
26756ba97d394b418af1a6772a226ff2f2c18b55
Link:
https://www.unpac.me/results/49e5c20f-3f6c-4d41-9fa4-d906944a4d0e/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/e87a5c719ac7/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/e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af

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:MAL_XMR_Miner_May19_1
Create hunting rule
Author:Florian Roth
Description:Detects Monero Crypto Coin Miner
Reference:https://www.guardicore.com/2019/05/nansh0u-campaign-hackers-arsenal-grows-stronger/
Rule name:MINER_monero_mining_detection
Create hunting rule
Author:Christiaan Beek | McAfee ATR Team
Description:Monero mining software
Rule name:win_tofsee_w0
Create hunting rule
Author:akrasuski1
Rule name:XMRIG_Monero_Miner
Create hunting rule
Author:Florian Roth
Description:Detects Monero mining software
Reference:https://github.com/xmrig/xmrig/releases

File information

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

Web download

Tofsee

Executable exe e87a5c719ac7af99f1478732889d5df0a275315b42b3b9aecc8b91333bd9c0af

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1558231/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/182359/

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