MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d. 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: 10


Intelligence 10 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d
SHA3-384 hash: 2aad65482e3bb07c44d1f4b09ae6e06ed2b469cc9319ffaae0a21598119f71a3293fb6db1116c8e8de0a0bd99135bca9
SHA1 hash: feb17b38763d9619e80d6742978d25a30c95f2f6
MD5 hash: 13a7436f019185b4d0295330e80c5d7a
humanhash: cat-papa-hamper-arizona
File name:Greenkeeper Iberia S.L._Products Inquiry.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:381'469 bytes
First seen:2021-02-03 07:18:19 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 6144:77GqhAWODGQT1gGLi4iZohZPLLmxmVJNvgOXjfSNatQuBt28i0VF0QWi9uNxF228:PGCxe1RgGG4fjD0mVMKLSNqQuB08iwFN
TLSH 2684BFB875143DE6266F566BCD96BDDD13B526238ACBA4CC40B8BBC30563376FE02805
Reporter abuse_ch
Tags:CVE-2017-11882 doc RemcosRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: gmail.com
Sending IP: 84.38.135.136
From: Alberto Ezquerra <a.ezquerra@gkiberia.eu>
Subject: Re: New Products Inquiry.
Attachment: Greenkeeper Iberia S.L._Products Inquiry.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Greenkeeper Iberia S.L._Products Inquiry.doc
Verdict:
No threats detected
Analysis date:
2021-02-03 07:28:03 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/2a4f5add-7b09-476e-8963-b812dea213f4

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):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-2.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.170830.UNOFFICIAL
Create hunting rule

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

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
DNS request
Creating a file in the %AppData% directory
Running batch commands
Creating a process with a hidden window
Adding an access-denied ACE
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Deleting a recently created file
Launching the default Windows debugger (dwwin.exe)
Connecting to a non-recommended domain
Connection attempt
Sending an HTTP GET request
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Setting a global event handler for the keyboard
Creating a process from a recently created file
Sending an HTTP GET request to an infection source
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d/results/dashboard
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/597575
Signature
Antivirus detection for URL or domain
Contains functionality to capture and log keystrokes
Contains functionality to hide a thread from the debugger
Contains functionality to inject code into remote processes
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
Detected Remcos RAT
Hides threads from debuggers
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 347834 Sample: Greenkeeper Iberia S.L._Pro... Startdate: 03/02/2021 Architecture: WINDOWS Score: 100 54 Malicious sample detected (through community Yara rule) 2->54 56 Antivirus detection for URL or domain 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 7 other signatures 2->60 12 EQNEDT32.EXE 1 2->12         started        17 WINWORD.EXE 291 25 2->17         started        process3 dnsIp4 52 sfghfsfjskdjkdfbvndcnfjskaklwrrfw.ydns.eu 46.183.220.125, 49167, 80 DATACLUBLV Latvia 12->52 46 C:\Users\user\AppData\Roaming\JVX.exe, PE32 12->46 dropped 78 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 12->78 19 JVX.exe 12 1 12->19         started        file5 signatures6 process7 dnsIp8 48 193.239.147.103, 49168, 49169, 80 DEDIPATH-LLCUS Brunei Darussalam 19->48 70 Contains functionality to steal Chrome passwords or cookies 19->70 72 Contains functionality to capture and log keystrokes 19->72 74 Contains functionality to inject code into remote processes 19->74 76 6 other signatures 19->76 23 JVX.exe 1 3 19->23         started        26 cmd.exe 19->26         started        signatures9 process10 file11 44 C:\Users\user\AppData\Roaming\chrome.exe, PE32 23->44 dropped 28 wscript.exe 1 23->28         started        30 timeout.exe 26->30         started        process12 process13 32 cmd.exe 28->32         started        process14 34 chrome.exe 12 1 32->34         started        signatures15 62 Contains functionality to steal Chrome passwords or cookies 34->62 64 Contains functionality to capture and log keystrokes 34->64 66 Contains functionality to steal Firefox passwords or cookies 34->66 68 3 other signatures 34->68 37 chrome.exe 2 1 34->37         started        40 cmd.exe 34->40         started        process16 dnsIp17 50 everestenterprses21.sytes.net 192.253.246.137, 2018 LEASEWEB-USA-NYC-11US United States 37->50 42 timeout.exe 40->42         started        process18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-02-03 07:19:07 UTC
AV detection:
19 of 45 (42.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=f6c4ihxbhvu6nbcu3fyvgjjorou2hihikvzue7vmayanih5gqjgq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence ransomware rat
Link:
https://tria.ge/reports/210203-88ydrp7kv2/
Behaviour
Checks processor information in registry
Delays execution with timeout.exe
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Program crash
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
Remcos
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/2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:INDICATOR_RTF_EXPLOIT_CVE_2017_11882_4
Create hunting rule
Author:ditekSHen
Description:detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882
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:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Malspam

RemcosRAT

Word file doc 2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d

(this sample)

  
Delivery method
Distributed via e-mail attachment

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