MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0. 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


RemcosRAT


Vendor detections: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0
SHA3-384 hash: 4fbb08bcf6cdfe5bc30a8998baaadf9226cc5612095529dee083dc5927b95f2e978da409c769a1b5a33c995fd14ae9be
SHA1 hash: e20554de2973328ed178e4de496b293409e2d349
MD5 hash: 6c1c3aca712ac06d9f22a8308829e23d
humanhash: ohio-golf-fruit-fourteen
File name:inv.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:25'797 bytes
First seen:2022-08-02 11:22:10 UTC
Last seen:Never
File type:Word file doc
MIME type:application/octet-stream
ssdeep 384:Qx08zjoJBtLucsALXaWwpSy53cpz3yMKqWnidnhm8u6xT2uxDqGV2j:QhjoJBoiqWmSy9cpzLKqWn+nhntQuxSj
TLSH T194C2EA7EB69B4E4CAB17D764140A7FAA0229F51D63C044D1BBBCE7307D5D8178B21638
Reporter TeamDreier
Tags:CVE-2017-11882 doc RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
258
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
Re Re New PO's-WPI-COMMERCIAL INVOICE.msg
Verdict:
Malicious activity
Analysis date:
2022-08-02 13:57:04 UTC
Tags:
opendir trojan exploit CVE-2017-11882 loader keylogger remcos
Link:
https://app.any.run/tasks/98326841-7c0c-4586-a4eb-a393c34c65bc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
SecuriteInfo.com.Spam-473.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.27333.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-1.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.26244.RtfHeur.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.EvilRTF.CVE-2017-0199-Obfus.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
Sending an HTTP GET request
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
CVE-2017-11882 embedequation exploit greyware javascript packed shellcode
Link:
https://www.filescan.io/uploads/62e90954b7eec6562784a28c/reports/de70a617-2f0d-4e03-b503-3443569c83ff/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1044801
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
Drops PE files to the user root directory
Initial sample is an obfuscated RTF file
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 677295 Sample: inv.doc Startdate: 02/08/2022 Architecture: WINDOWS Score: 100 35 Initial sample is an obfuscated RTF file 2->35 37 Multi AV Scanner detection for domain / URL 2->37 39 Malicious sample detected (through community Yara rule) 2->39 41 15 other signatures 2->41 7 EQNEDT32.EXE 12 2->7         started        12 WINWORD.EXE 291 21 2->12         started        process3 dnsIp4 33 3.70.225.229, 49173, 80 AMAZON-02US United States 7->33 21 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 7->21 dropped 23 C:\Users\Public\vbc.exe, PE32 7->23 dropped 51 Office equation editor establishes network connection 7->51 53 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->53 14 vbc.exe 7->14         started        25 C:\Users\user\Desktop\~$inv.doc, data 12->25 dropped 27 ~WRF{98F2CE34-4105...0-354FFB284417}.tmp, Composite 12->27 dropped file5 signatures6 process7 signatures8 55 Multi AV Scanner detection for dropped file 14->55 57 Machine Learning detection for dropped file 14->57 59 Writes to foreign memory regions 14->59 61 2 other signatures 14->61 17 InstallUtil.exe 2 13 14->17         started        process9 dnsIp10 29 fery.mastercoa.co 109.248.150.180, 49174, 7071 DATACLUBLV Russian Federation 17->29 31 geoplugin.net 178.237.33.50, 49175, 80 ATOM86-ASATOM86NL Netherlands 17->31 43 Contains functionality to steal Chrome passwords or cookies 17->43 45 Contains functionality to register a low level keyboard hook 17->45 47 Contains functionality to steal Firefox passwords or cookies 17->47 49 2 other signatures 17->49 signatures11
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2022-08-02 00:03:48 UTC
File Type:
Document
Extracted files:
5
AV detection:
15 of 26 (57.69%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4amen6fzslvckabzrb3cq3am3ieswu4qrf4o3lbje2cgxc6zd7qa._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost rat
Link:
https://tria.ge/reports/220802-nljvraecg2/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Suspicious use of SetThreadContext
Loads dropped DLL
Uses the VBS compiler for execution
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
fery.mastercoa.co:7071
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e01846f8b992/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.05
Link:
https://yomi.yoroi.company/submissions/e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0

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:INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.
Rule name:SUSP_RTF_Header_Anomaly_RID2F7F
Create hunting rule
Author:Florian Roth
Description:Detects malformed RTF header often used to trick mechanisms that check for a full RTF header
Reference:https://twitter.com/ItsReallyNick/status/975705759618158593

File information

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

Web download

RemcosRAT

Word file doc e01846f8b992ea2500398876286c0cda092b53908978edac2926846b8bd91fe0

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2263771/
  
Delivery method
Distributed via web download

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