MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 84839e5c70038104b4d9fbf20988ebc952ea698be6d46c0ad5ed072897427b3f. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 84839e5c70038104b4d9fbf20988ebc952ea698be6d46c0ad5ed072897427b3f
SHA3-384 hash: 563286ca866f9748f6c894c63401bb790c5ff15b14c3ec208e01cf4512cd82fde2a9cf654dcd49d6aad225a6b715881c
SHA1 hash: a9b5b16d21b145997a803857a743ce79ac0383b1
MD5 hash: a1d23796732487b40ce43b22983327b2
humanhash: diet-sink-autumn-massachusetts
File name:a1d23796732487b40ce43b22983327b2.exe
Download: download sample
Signature Tofsee
Create hunting rule
File size:285'696 bytes
First seen:2021-10-20 06:22:22 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 14b63e3da456510ba5e30b170114ae1b (1 x Stop, 1 x Smoke Loader, 1 x Tofsee)
ssdeep 6144:a96eGTpqev/sFhZWxJx6tWbMqX7tNfVXVHQLIiu8cfo0/pW:a9v+pqeHvnrQwZGEX8cA0/M
Threatray 173 similar samples on MalwareBazaar
TLSH T1E2549D3072B4C466DBB205308C39CEE56579B819DA60F16733F8AA1E2E71A8C56F135E
File icon (PE):PE icon
dhash icon fcfcf4d4d4d4d8c0 (41 x RedLineStealer, 30 x RaccoonStealer, 9 x Smoke Loader)
Reporter abuse_ch
Tags:exe Tofsee

Intelligence

File Origin
# of uploads :
1
# of downloads :
849
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/198715/
Detection(s):
SecuriteInfo.com.W32.AIDetect.malware1.12047.4846.UNOFFICIAL
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 system32 subdirectory
Launching a process
Creating a service
Launching a service
Creating a process from a recently created file
DNS request
Connection attempt
Sending a custom TCP request
Creating a file
Sending an HTTP GET request
Enabling autorun for a service
Unauthorized injection to a system process
Deleting of the original file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
greyware packed
Link:
https://www.filescan.io/uploads/616fb6dca9d585e6d52e53fb/reports/9496bd78-ad90-43db-a1d7-0f1f644b524a/overview
Result
Verdict:
UNKNOWN
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/8994b5c6-8c2a-4bda-94e8-be6a7e2b1afe
Result
Threat name:
Tofsee
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/873672
Signature
Allocates memory in foreign processes
Antivirus detection for dropped file
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
Found malware configuration
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: 506098 Sample: 5rOFYHieus.exe Startdate: 20/10/2021 Architecture: WINDOWS Score: 100 47 microsoft-com.mail.protection.outlook.com 2->47 53 Found malware configuration 2->53 55 Antivirus detection for dropped file 2->55 57 Multi AV Scanner detection for submitted file 2->57 59 8 other signatures 2->59 8 flgjsbbw.exe 2->8         started        11 5rOFYHieus.exe 2 2->11         started        14 svchost.exe 1 2->14         started        16 3 other processes 2->16 signatures3 process4 file5 65 Detected unpacking (changes PE section rights) 8->65 67 Detected unpacking (overwrites its own PE header) 8->67 69 Writes to foreign memory regions 8->69 75 2 other signatures 8->75 18 svchost.exe 1 8->18         started        45 C:\Users\user\AppData\Local\...\flgjsbbw.exe, PE32 11->45 dropped 71 Uses netsh to modify the Windows network and firewall settings 11->71 73 Modifies the windows firewall 11->73 22 cmd.exe 1 11->22         started        25 netsh.exe 3 11->25         started        27 cmd.exe 2 11->27         started        29 3 other processes 11->29 signatures6 process7 dnsIp8 49 quadoil.ru 47.88.12.192, 443, 49779, 49821 CNNIC-ALIBABA-US-NET-APAlibabaUSTechnologyCoLtdC United States 18->49 51 microsoft-com.mail.protection.outlook.com 40.93.207.1, 25, 49778, 49858 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 18->51 61 System process connects to network (likely due to code injection or exploit) 18->61 63 Deletes itself after installation 18->63 43 C:\Windows\SysWOW64\...\flgjsbbw.exe (copy), PE32 22->43 dropped 31 conhost.exe 22->31         started        33 conhost.exe 25->33         started        35 conhost.exe 27->35         started        37 conhost.exe 29->37         started        39 conhost.exe 29->39         started        41 conhost.exe 29->41         started        file9 signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/84839e5c70038104b4d9fbf20988ebc952ea698be6d46c0ad5ed072897427b3f/
Threat name:
Win32.Backdoor.Tofsee
Create hunting rule
Status:
Malicious
First seen:
2021-10-20 06:23:06 UTC
AV detection:
25 of 44 (56.82%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qsbz4xdqaoaqjngz7pzatchlzfjou2ml43kgycwv5udsrf2cpm7q._file
Verdict:
malicious
Similar samples:
0467d83ba3b0d1f7c09d3fa662383e261ea44ea866cdfa0c686eba4cc5a822f2
Tofsee
1ae374502df9e63ab3d4b3bc2611b0758f97285c3eb49d58713fd654ed9ab756
Tofsee
1dfb58a81f3624b21eb10ce87795e1aa2b3fd928ae83f7c52a37d6cb19e25cf8
Tofsee
8325ddbf8fc654039273c60aee91332ebf8d8896da1109f6abac422f910bddf9
Tofsee
b107df92ff500ba6ea60893330131d3365f30691593c0ab4719578ac3b44a14d
Tofsee
c06690e3dbb4835f160b434d1bc16ae2731849781ac4c6c718e68e8a54c9d007
Tofsee
c3885fb6e521c358f6058bf09ab7835fc7f0aa71502da2cc7e44701224bfec3a
Tofsee
d14e8195937a6bd3ff1c8e25376f3cf6ccba3b373c894fb147912530f15b85db
Tofsee
+ 163 additional samples on MalwareBazaar
Result
Malware family:
xmrig
Create hunting rule
Score:
  10/10
Tags:
family:tofsee family:xmrig evasion miner persistence suricata trojan
Link:
https://tria.ge/reports/211020-g5gfeahfcp/
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
suricata: ET MALWARE DNS Query Sinkhole Domain Various Families (Possible Infected Host)
xmrig
Malware Config
C2 Extraction:
quadoil.ru
lakeflex.ru
Unpacked files
SH256 hash:
448e8aeb2dcd412f100bd4271b6bc0f87d6922877f96d874d74144ec811de88c
MD5 hash:
40f53a7b73d2d93a204c3a74367fb4c2
SHA1 hash:
39e2dcabc45f28f8d6ec36027032d40060abb047
Detections:
win_tofsee_w0
Create hunting rule
Link:
https://www.unpac.me/results/66a14021-98fb-40b2-9744-be328f666e0b/
Parent samples :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 hash:
84839e5c70038104b4d9fbf20988ebc952ea698be6d46c0ad5ed072897427b3f
MD5 hash:
a1d23796732487b40ce43b22983327b2
SHA1 hash:
a9b5b16d21b145997a803857a743ce79ac0383b1
Link:
https://www.unpac.me/results/66a14021-98fb-40b2-9744-be328f666e0b/
Malware family:
XMRIG
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/84839e5c7003/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/84839e5c70038104b4d9fbf20988ebc952ea698be6d46c0ad5ed072897427b3f

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.

Cape
Cape
https://www.capesandbox.com/analysis/198715/

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