MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6520b87b306eadc88a7f1846db167cfe940dfc99343b028b74b138a8e4fcd08d. 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


AgentTesla


Vendor detections: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6520b87b306eadc88a7f1846db167cfe940dfc99343b028b74b138a8e4fcd08d
SHA3-384 hash: c727c40d39fcaf9ca4d9ade0cd8abb050ecd432545726e4ced288dbd71817c9e38a1d57d2ac2526f3072f92860f7ce3f
SHA1 hash: 873ef78ea1a896a950b2efe02afc2191aa3a56cf
MD5 hash: bf5becd411994bc75e61acd227588dc6
humanhash: rugby-two-lion-bacon
File name:RFQ Tengco_270121.doc
Download: download sample
Signature AgentTesla
Create hunting rule
File size:321'947 bytes
First seen:2021-01-27 05:49:10 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 6144:9j/yFH34vSdp8W2HCf9VFVcg88AGiU6Aq7rv2pHzT7s5WhDBVEV3q21EdwKsHUTn:9jKZE2ECHF851hjkzT7qA706WQCghl
TLSH 2A64BFF875046DE62A6F57AFDA96ACDC13B626639ACBA4CC406477C305A3335FE12C01
Reporter abuse_ch
Tags:AgentTesla doc


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: tengco.com
Sending IP: 37.49.225.141
From: Christopher Clark <ChristopherClark@tengco.com>
Reply-To: Email ADMIN <noreply@domain-admin.com>
Subject: REQUEST FOR QUOTATION
Attachment: RFQ Tengco_270121.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ Tengco_270121.doc
Verdict:
Malicious activity
Analysis date:
2021-01-27 05:52:51 UTC
Tags:
exploit CVE-2017-11882
Link:
https://app.any.run/tasks/8ace6a31-d2de-4d32-b6e2-ed2bcd161bfb

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
Using the Windows Management Instrumentation requests
Sending an HTTP GET request
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process by context flags manipulation
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/6520b87b306eadc88a7f1846db167cfe940dfc99343b028b74b138a8e4fcd08d/results/dashboard
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/591502
Signature
.NET source code contains very large array initializations
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
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)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Mail credentials (via file access)
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 344793 Sample: RFQ Tengco_270121.doc Startdate: 27/01/2021 Architecture: WINDOWS Score: 100 42 Found malware configuration 2->42 44 Multi AV Scanner detection for submitted file 2->44 46 Yara detected AgentTesla 2->46 48 6 other signatures 2->48 7 EQNEDT32.EXE 11 2->7         started        12 WINWORD.EXE 336 20 2->12         started        14 EQNEDT32.EXE 2->14         started        process3 dnsIp4 32 cybersng.duckdns.org 104.37.4.35, 49165, 80 M247M247LtdMetronetUKLimitedVenusBusinessCommun United States 7->32 34 cy.kl-re.com 7->34 24 C:\...\dcfgtjerlwerweq;woijhkvgjfhdgh.exe, PE32 7->24 dropped 26 C:\Users\user\AppData\Local\...\omamsa[1].exe, PE32 7->26 dropped 58 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->58 16 dcfgtjerlwerweq;woijhkvgjfhdgh.exe 12 7->16         started        file5 signatures6 process7 dnsIp8 28 193.239.147.103, 49166, 80 DEDIPATH-LLCUS Brunei Darussalam 16->28 36 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->36 38 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 16->38 40 Injects a PE file into a foreign processes 16->40 20 dcfgtjerlwerweq;woijhkvgjfhdgh.exe 4 16->20         started        signatures9 process10 dnsIp11 30 mail.privateemail.com 198.54.122.60, 49167, 49169, 49170 NAMECHEAP-NETUS United States 20->30 50 Tries to steal Mail credentials (via file access) 20->50 52 Tries to harvest and steal ftp login credentials 20->52 54 Tries to harvest and steal browser information (history, passwords, etc) 20->54 56 Installs a global keyboard hook 20->56 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6520b87b306eadc88a7f1846db167cfe940dfc99343b028b74b138a8e4fcd08d/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-01-27 05:50:08 UTC
AV detection:
23 of 46 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=muqlq6zqn2w4rct7dbdnwft472ka37ezgq5qfc3uwe4krzh42cgq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
ransomware
Link:
https://tria.ge/reports/210127-rs99vkpcqa/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Enumerates physical storage devices
Blocklisted process makes network request
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/6520b87b306eadc88a7f1846db167cfe940dfc99343b028b74b138a8e4fcd08d

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

AgentTesla

Word file doc 6520b87b306eadc88a7f1846db167cfe940dfc99343b028b74b138a8e4fcd08d

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments