MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5c131d192bb0f86309fb424ecd58f929aee48a3244b3a49ce6a8422158b7a154. 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


WSHRAT


Vendor detections: 11


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

SHA256 hash: 5c131d192bb0f86309fb424ecd58f929aee48a3244b3a49ce6a8422158b7a154
SHA3-384 hash: 82101bfb43e213bbac68f8ee3802aca55cd396d513e122dbf5092a87cec6a9f918e89ba61efe0259bdab8191fd445217
SHA1 hash: b618e6418c4b235c9deb58d7741a0cc3ce04ab2e
MD5 hash: a375d041d35259be20a45fdfbd966085
humanhash: football-robin-eleven-earth
File name:EU441789083.doc
Download: download sample
Signature WSHRAT
Create hunting rule
File size:4'618 bytes
First seen:2021-02-05 16:05:28 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 96:byF1X4B3QKgWk2klqSC8FRZ1NQFLb9aU4IVJhe5s+6dhSJGWSr1zlvrZak:iSlT8qWv6b9akVJj+6dhSJGDr1z50k
TLSH 6B9109641B491C13D38DA2EAD98ABD098AE6FC7687CF3561F11DEDF10322A564A12C81
Reporter abuse_ch
Tags:doc RAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: ns1003676.ip-92-204-132.us
Sending IP: 92.204.132.28
From: Gelene Boday <info@roselyn.ourfirm.com>
Subject: AMOXICILLIN TRIHYDRATE/Clavulanic acid
Attachment: EU441789083.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
100
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
EU441789083.doc
Verdict:
Malicious activity
Analysis date:
2021-02-05 16:57:30 UTC
Tags:
trojan exploit CVE-2017-11882 loader evasion stealer wshrat
Link:
https://app.any.run/tasks/0b662d95-31b8-44dc-b57c-dbad7d37c642

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.DOCXSTRGOOD.RTFSTR._EQUATION.200422.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
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Creating a file
Enabling the 'hidden' option for recently created files
Possible injection to a system process
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
Creating a file in the mass storage device
Creating a process from a recently created file
Enabling autorun by creating a file
Enabling threat expansion on mass storage devices by creating a special LNK file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/5c131d192bb0f86309fb424ecd58f929aee48a3244b3a49ce6a8422158b7a154/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
WSHRAT
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/600401
Signature
Antivirus detection for dropped file
Connects to a pastebin service (likely for C&C)
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Drops VBS files to the startup folder
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
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)
Potential evasive VBS script found (sleep loop)
Potential malicious VBS script found (has network functionality)
Potential malicious VBS script found (suspicious strings)
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: Drops script at startup location
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Register Wscript In Run Key
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
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
Windows Shell Script Host drops VBS files
Wscript called in batch mode (surpress errors)
Yara detected AntiVM_3
Yara detected WSHRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 349224 Sample: EU441789083.doc Startdate: 05/02/2021 Architecture: WINDOWS Score: 100 68 Sigma detected: Register Wscript In Run Key 2->68 70 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->70 72 Multi AV Scanner detection for submitted file 2->72 74 13 other signatures 2->74 9 EQNEDT32.EXE 1 2->9         started        14 wscript.exe 2->14         started        16 wscript.exe 2->16         started        18 4 other processes 2->18 process3 dnsIp4 54 kinghome.logsik.net 171.244.17.76, 49165, 80 VTDC-AS-VNVietel-CHTCompamyLtdVN Viet Nam 9->54 44 C:\Users\user\AppData\Roaming\BLindex.exe, PE32 9->44 dropped 86 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 9->86 20 BLindex.exe 1 5 9->20         started        56 pastebin.com 14->56 88 System process connects to network (likely due to code injection or exploit) 14->88 90 Wscript called in batch mode (surpress errors) 14->90 23 wscript.exe 14->23         started        92 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 16->92 file5 signatures6 process7 signatures8 76 Antivirus detection for dropped file 20->76 78 Multi AV Scanner detection for dropped file 20->78 80 Detected unpacking (changes PE section rights) 20->80 82 6 other signatures 20->82 25 BLindex.exe 2 20->25         started        28 BLindex.exe 20->28         started        process9 file10 42 C:\Users\user\AppData\Roaming\fLOqD.vbs, assembler 25->42 dropped 30 wscript.exe 3 3 25->30         started        process11 dnsIp12 58 pastebin.com 104.23.98.190, 443, 49166, 49167 CLOUDFLARENETUS United States 30->58 46 C:\Users\user\fLOqD.vbs, assembler 30->46 dropped 60 Potential malicious VBS script found (suspicious strings) 30->60 62 Potential malicious VBS script found (has network functionality) 30->62 64 Potential evasive VBS script found (sleep loop) 30->64 66 4 other signatures 30->66 35 wscript.exe 14 30->35         started        file13 signatures14 process15 dnsIp16 48 mercedez.duckdns.org 185.19.85.172, 49171, 49173, 49175 DATAWIRE-ASCH Switzerland 35->48 50 ip-api.com 208.95.112.1, 49170, 49172, 49174 TUT-ASUS United States 35->50 52 pastebin.com 35->52 40 C:\Users\user\AppData\Roaming\...\fLOqD.vbs, assembler 35->40 dropped 84 System process connects to network (likely due to code injection or exploit) 35->84 file17 signatures18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5c131d192bb0f86309fb424ecd58f929aee48a3244b3a49ce6a8422158b7a154/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-02-05 14:43:02 UTC
AV detection:
18 of 29 (62.07%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lqjr2gjlwd4ggcp3ijhm2whzfgxojcrsisz2jhhgvbbccwfxufka._file
Result
Malware family:
wshrat
Create hunting rule
Score:
  10/10
Tags:
family:wshrat persistence ransomware trojan
Link:
https://tria.ge/reports/210205-eehlbmem6e/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Script User-Agent
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
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Drops startup file
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
WSHRAT
WSHRAT Payload
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Bloodhound
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/5c131d192bb0f86309fb424ecd58f929aee48a3244b3a49ce6a8422158b7a154

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

WSHRAT

Word file doc 5c131d192bb0f86309fb424ecd58f929aee48a3244b3a49ce6a8422158b7a154

(this sample)

  
Delivery method
Distributed via e-mail attachment

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