MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3. 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: 14


Intelligence 14 IOCs YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3
SHA3-384 hash: 7b6a1673026406ed7e9776d553c6456e8fb3f62475eb35aeae949b78ea51435240f38f1843706ff52caef17d4e439fd3
SHA1 hash: fddeaa42be7deaa360c0bccf2886ee019e61d9b9
MD5 hash: 592dd1fe894165940b95381201c91017
humanhash: mango-golf-potato-sodium
File name:592dd1fe894165940b95381201c91017
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:51'243 bytes
First seen:2023-09-09 05:57:19 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:+wAbZSibMX9gRWjHtflPPE8s/JuM0U80r4GkbTxIbce2puw8gkvxH4:+wAlR+tpMLJ/ZkbTxIbce2CbpY
TLSH T156336969C38F01A9CF5252379B165A4442FDBB7EF38552B1302C837933EE82D922627D
Reporter zbetcheckin
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
164
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Fiyat Teklif Formu.docx
Verdict:
Malicious activity
Analysis date:
2023-09-08 11:12:50 UTC
Tags:
exploit cve-2017-11882 loader
Link:
https://app.any.run/tasks/f73d83d8-ad29-4ed6-be5e-8f9de5084da7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.29015.RtfHeur.Msg.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.EvilRTF.CommonLure.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RoomService.20230808.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file in the %AppData% directory
Сreating synchronization primitives
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/64fc096986964ed9c616aef2/reports/b3d80069-4e72-43bb-b0f7-55ac0e8221ac/overview
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1306609
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
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 capture and log keystrokes
Contains functionality to detect virtual machines (IN, VMware)
Contains functionality to inject code into remote processes
Contains functionality to modify clipboard data
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
Creates an autostart registry key pointing to binary in C:\Windows
Detected Remcos RAT
Drops executables to the windows directory (C:\Windows) and starts them
Found malware configuration
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)
Sigma detected: File Dropped By EQNEDT32EXE
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses known network protocols on non-standard ports
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1306609 Sample: lB3H7SMEB1.rtf Startdate: 09/09/2023 Architecture: WINDOWS Score: 100 78 Multi AV Scanner detection for domain / URL 2->78 80 Found malware configuration 2->80 82 Malicious sample detected (through community Yara rule) 2->82 84 17 other signatures 2->84 11 EQNEDT32.EXE 11 2->11         started        16 Windows Session Start.exe 2 2->16         started        18 Windows Session Start.exe 2->18         started        20 WINWORD.EXE 291 16 2->20         started        process3 dnsIp4 70 185.28.39.17, 49163, 7777 NETROUTING-ASNL Belgium 11->70 62 C:\Users\user\AppData\...\chungolfif8468.exe, PE32 11->62 dropped 64 C:\Users\user\AppData\...\chungzx[1].exe, PE32 11->64 dropped 114 Office equation editor establishes network connection 11->114 116 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->116 22 chungolfif8468.exe 1 7 11->22         started        118 Detected Remcos RAT 16->118 120 Injects a PE file into a foreign processes 16->120 25 Windows Session Start.exe 16->25         started        27 Windows Session Start.exe 3 16->27         started        30 Windows Session Start.exe 16->30         started        32 Windows Session Start.exe 16->32         started        34 Windows Session Start.exe 18->34         started        66 ~WRF{8A4EE4BD-61B9...4-93C331772BA9}.tmp, Composite 20->66 dropped file5 signatures6 process7 dnsIp8 92 Multi AV Scanner detection for dropped file 22->92 94 Detected Remcos RAT 22->94 96 Machine Learning detection for dropped file 22->96 104 7 other signatures 22->104 36 chungolfif8468.exe 2 4 22->36         started        40 chungolfif8468.exe 22->40         started        98 Drops executables to the windows directory (C:\Windows) and starts them 25->98 100 Injects a PE file into a foreign processes 25->100 42 Windows Session Start.exe 25->42         started        44 Windows Session Start.exe 25->44         started        72 ascoitaliasasummer.duckdns.org 194.147.140.199, 3030, 49165, 49166 PTPEU unknown 27->72 102 Installs a global keyboard hook 27->102 signatures9 process10 file11 60 C:\Windows\...\Windows Session Start.exe, PE32 36->60 dropped 86 Detected Remcos RAT 36->86 88 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 36->88 90 Creates an autostart registry key pointing to binary in C:\Windows 36->90 46 cmd.exe 36->46         started        signatures12 process13 signatures14 122 Uses ping.exe to sleep 46->122 124 Uses ping.exe to check the status of other devices and networks 46->124 49 Windows Session Start.exe 2 46->49         started        52 PING.EXE 46->52         started        process15 dnsIp16 74 Detected Remcos RAT 49->74 76 Injects a PE file into a foreign processes 49->76 55 Windows Session Start.exe 2 1 49->55         started        68 127.0.0.1 unknown unknown 52->68 signatures17 process18 signatures19 106 Detected Remcos RAT 55->106 108 Writes to foreign memory regions 55->108 110 Allocates memory in foreign processes 55->110 112 Injects a PE file into a foreign processes 55->112 58 iexplore.exe 55->58         started        process20
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-09-08 08:53:10 UTC
File Type:
Document
Extracted files:
3
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sffsjicnkklfkcmaerhxmlbpykwlbnunodljrkz22ysmclsmmxbq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:tribunal persistence rat
Link:
https://tria.ge/reports/230909-gn5rnshf7y/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Runs ping.exe
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of SetThreadContext
Adds Run key to start application
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Remcos
Malware Config
C2 Extraction:
ascoitaliasasummer.duckdns.org:3030
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/914b24a04d52/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.99
Link:
https://yomi.yoroi.company/submissions/914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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_INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:https://github.com/ditekshen/detection

File information

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

Web download

RemcosRAT

Rich Text Format (RTF) rtf 914b24a04d5296550980244f762c2fc2acb0b68d70d698ab3ad624c12e4c65c3

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2710775/

Comments


Avatar
zbet commented on 2023-09-09 05:57:20 UTC

url : hxxp://185.28.39.17:7777/185.28.39.18/chungzx.doc