MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b2d3ea72a3ea0d19826c447346cc134d08bf6d48326bc289c4fd11104a66cafc. 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 1 File information Comments 1
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SHA256 hash: b2d3ea72a3ea0d19826c447346cc134d08bf6d48326bc289c4fd11104a66cafc
SHA3-384 hash: 1397b5aef03f4a8b495d1fb350c4ef6bb8eaf056066591db21c9f5ab0270c9eae73f28c072fe018a99438a0bfb3d4707
SHA1 hash: 4049f2a3184cb63604d7fa9d30501a15b10161ed
MD5 hash: d55f421828d1f39ad61ae8a92028be1a
humanhash: one-august-magnesium-carpet
File name:d55f421828d1f39ad61ae8a92028be1a
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:22'989 bytes
First seen:2022-10-05 10:48:49 UTC
Last seen:2022-10-05 12:28:02 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:yfxr8RPBpl4DgwA8OzV1UJ2YN3mhwKzC+tnXQMYCviNRLPll+UTiKd:yfxrmBpl4DgwROzV2J2mmhwKzXJXxYIo
TLSH T1CDA2453EF28B8F8CCB47C294150A3F821668F94D93C59892E7BCFB34694595F9326934
Reporter zbetcheckin
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
213
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Exploit.ShellCode.69.29548.13977.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Сreating synchronization primitives
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/b2d3ea72a3ea0d19826c447346cc134d08bf6d48326bc289c4fd11104a66cafc/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
No Threat
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/633d611f0d3d21420cca948d/reports/e4f7a910-4e87-47c1-843d-0b53ffc9e10d/overview
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/1084041
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Encrypted powershell cmdline option found
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 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
Snort IDS alert for network traffic
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 716596 Sample: LkzuUzJoxM.rtf Startdate: 05/10/2022 Architecture: WINDOWS Score: 100 48 Snort IDS alert for network traffic 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus / Scanner detection for submitted sample 2->52 54 12 other signatures 2->54 7 EQNEDT32.EXE 12 2->7         started        12 Kbvypcxq.exe 1 2->12         started        14 Kbvypcxq.exe 1 2->14         started        16 2 other processes 2->16 process3 dnsIp4 42 107.175.193.183, 49171, 80 AS-COLOCROSSINGUS United States 7->42 38 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 7->38 dropped 40 C:\Users\Public\vbc.exe, PE32 7->40 dropped 64 Office equation editor establishes network connection 7->64 66 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->66 18 vbc.exe 1 3 7->18         started        68 Multi AV Scanner detection for dropped file 12->68 70 Machine Learning detection for dropped file 12->70 72 Encrypted powershell cmdline option found 12->72 22 powershell.exe 12->22         started        24 InstallUtil.exe 12->24         started        74 Writes to foreign memory regions 14->74 76 Allocates memory in foreign processes 14->76 78 Injects a PE file into a foreign processes 14->78 26 powershell.exe 14->26         started        28 InstallUtil.exe 14->28         started        file5 signatures6 process7 file8 36 C:\Users\user\AppData\...\Kbvypcxq.exe, PE32 18->36 dropped 56 Multi AV Scanner detection for dropped file 18->56 58 Machine Learning detection for dropped file 18->58 60 Encrypted powershell cmdline option found 18->60 62 3 other signatures 18->62 30 InstallUtil.exe 2 13 18->30         started        34 powershell.exe 6 18->34         started        signatures9 process10 dnsIp11 44 mam.mastercoa.co 192.30.89.27, 37824, 49172 CLOUDSINGULARITYCA Canada 30->44 46 geoplugin.net 178.237.33.50, 49173, 80 ATOM86-ASATOM86NL Netherlands 30->46 80 Installs a global keyboard hook 30->80 signatures12
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b2d3ea72a3ea0d19826c447346cc134d08bf6d48326bc289c4fd11104a66cafc/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2022-10-05 06:25:22 UTC
File Type:
Document
Extracted files:
4
AV detection:
15 of 25 (60.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wlj6u4vd5igrtatmirzuntatjuel63kigjv4fcoe7uirastgzl6a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost persistence rat
Link:
https://tria.ge/reports/221005-mwne9aeba8/
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 AdjustPrivilegeToken
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
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
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:
mam.mastercoa.co:37824
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/0ecb7d2b-652b-442e-bcaa-d998e26dc1d7
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b2d3ea72a3ea/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/b2d3ea72a3ea0d19826c447346cc134d08bf6d48326bc289c4fd11104a66cafc

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
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Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.

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 b2d3ea72a3ea0d19826c447346cc134d08bf6d48326bc289c4fd11104a66cafc

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2350842/

Comments


Avatar
zbet commented on 2022-10-05 10:48:58 UTC

url : hxxp://107.175.193.183/wwuuUASDbjasduhuasduyuASHUDHUSADHUASDU/jjjhjjhjhjhhggftftftftftftf.doc