MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 63a4f89a7edeff9e5e817e8c61e8cff54cc5421bae27c35f343276991a52039b. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 63a4f89a7edeff9e5e817e8c61e8cff54cc5421bae27c35f343276991a52039b
SHA3-384 hash: ccabd509bcdb76cd0ccb042bca68d173e4c4a5cfc36e866efef1fd0d84999474d3f68a7326b61c4c3bb62a836aea0c28
SHA1 hash: ff9c405b4d691c6c160c8ac8909ea48af275ebd4
MD5 hash: 06a3692ab3f0a1a648d76f63a1b98cfc
humanhash: indigo-north-sierra-echo
File name:Cerere de pret NUM003112 09-02-2021.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:74'103 bytes
First seen:2021-02-09 10:04:31 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 1536:LcsgBux0cBTPZN7VjELoH2KQKOcmJgjzqhYFS6dWRiKcBfXSgJpBjZQ:L1TiLoHgbJsqhoS6gcBTrLQ
TLSH 7D73A0B87A042DD6A65F43A7D6867CDC02B9766295C760C9707CB7C70763376ED02C09
Reporter abuse_ch
Tags:CVE-2017-11882 doc GoDaddy RemcosRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: p3plsmtpa07-01.prod.phx3.secureserver.net
Sending IP: 173.201.192.230
From: Nicolae Joni <nicolae.joni@henrybutcher.com>
Reply-To: nicolae.joni@henrybutcher.com
Subject: Cerere de pret | NUM003112 | 09-02-2021
Attachment: Cerere de pret NUM003112 09-02-2021.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
127
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Cerere de pret NUM003112 09-02-2021.doc
Verdict:
Malicious activity
Analysis date:
2021-02-09 10:06:17 UTC
Tags:
trojan opendir exploit CVE-2017-11882 rat remcos
Link:
https://app.any.run/tasks/0d67742b-249c-44bf-874b-5f9bb02ec970

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

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
Creating a process with a hidden window
Running batch commands
Launching a file downloaded from the Internet
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:
Fake RTF File
Link:
https://app.docguard.net/63a4f89a7edeff9e5e817e8c61e8cff54cc5421bae27c35f343276991a52039b/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/602769
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus detection for URL or domain
Contains functionality to capture and log keystrokes
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
Contains functionalty to change the wallpaper
Detected Remcos RAT
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
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
Sigma detected: Suspicious Svchost Process
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AntiVM_3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 350404 Sample: Cerere de pret  NUM003112  ... Startdate: 09/02/2021 Architecture: WINDOWS Score: 100 78 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->78 80 Malicious sample detected (through community Yara rule) 2->80 82 Antivirus detection for URL or domain 2->82 84 11 other signatures 2->84 14 EQNEDT32.EXE 11 2->14         started        19 WINWORD.EXE 291 21 2->19         started        process3 dnsIp4 74 tunedinblog.com 150.95.81.183, 49167, 80 GMO-Z-COM-THGMO-ZcomNetDesignHoldingsCoLtdSG Singapore 14->74 56 C:\Users\user\AppData\...\prosper379346.exe, PE32 14->56 dropped 58 C:\Users\user\AppData\...\prosperx[1].exe, PE32 14->58 dropped 76 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 14->76 21 prosper379346.exe 14->21         started        file5 signatures6 process7 signatures8 92 Contains functionalty to change the wallpaper 21->92 94 Contains functionality to steal Chrome passwords or cookies 21->94 96 Contains functionality to capture and log keystrokes 21->96 98 4 other signatures 21->98 24 prosper379346.exe 1 4 21->24         started        process9 file10 54 C:\Users\user\AppData\Roaming\...\remcos.exe, PE32 24->54 dropped 27 wscript.exe 1 24->27         started        process11 process12 29 cmd.exe 27->29         started        process13 31 remcos.exe 29->31         started        signatures14 100 Contains functionalty to change the wallpaper 31->100 102 Contains functionality to steal Chrome passwords or cookies 31->102 104 Contains functionality to capture and log keystrokes 31->104 106 2 other signatures 31->106 34 remcos.exe 3 1 31->34         started        38 remcos.exe 31->38         started        process15 dnsIp16 66 167.88.9.90, 2050, 49168, 49371 NEXEONUS United States 34->66 86 Writes to foreign memory regions 34->86 88 Allocates memory in foreign processes 34->88 90 Injects a PE file into a foreign processes 34->90 40 svchost.exe 34->40         started        42 svchost.exe 34->42         started        44 svchost.exe 34->44         started        46 12 other processes 34->46 signatures17 process18 process19 48 iexplore.exe 40->48         started        dnsIp20 60 mem.gfx.ms 48->60 62 assets.onestore.ms 48->62 64 microsoftwindows.112.2o7.net 48->64 51 iexplore.exe 48->51         started        process21 dnsIp22 68 raw.githubusercontent.com 51->68 70 mem.gfx.ms 51->70 72 17 other IPs or domains 51->72
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/63a4f89a7edeff9e5e817e8c61e8cff54cc5421bae27c35f343276991a52039b/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-02-09 10:05:09 UTC
AV detection:
16 of 29 (55.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mosprgt6337z4xubp2ggd2gp6vgmkqq3vyt4gxzugj3jsgssaonq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence ransomware rat
Link:
https://tria.ge/reports/210209-rbtzzewzqn/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Enumerates physical storage devices
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:
0.96
Link:
https://yomi.yoroi.company/submissions/63a4f89a7edeff9e5e817e8c61e8cff54cc5421bae27c35f343276991a52039b

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_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.

File information

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

Malspam

RemcosRAT

Word file doc 63a4f89a7edeff9e5e817e8c61e8cff54cc5421bae27c35f343276991a52039b

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments