MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b6a7cb49d7be87043584fa415359964f96d151d86d6cf42100e46b52fa904cd4. 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: 10


Intelligence 10 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b6a7cb49d7be87043584fa415359964f96d151d86d6cf42100e46b52fa904cd4
SHA3-384 hash: bafdb10ef9eaf82bd97af3353aec2229de192e8b2c79f7207a01c24e5eff051ce2619ef4703ac10e97d73897e6d621fc
SHA1 hash: 6d4ea9f1c7a2b4eadefc32f86fd30217320550ef
MD5 hash: 7c0ac63cf2e1099e05dbb5c3b9b18050
humanhash: lima-tango-bravo-dakota
File name:SKM20012021.doc
Download: download sample
Signature AgentTesla
Create hunting rule
File size:1'937'400 bytes
First seen:2021-01-20 13:41:06 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 24576:+FZ/rtzGmw4WF4VEG6nhi3nu9hhy3xnmnj5vVkgWR6l943yZece5L/izWaD/BQVp:i
TLSH 8795AFB875047DE6267F576BDA96ACDC03A61B639ACBA4CC80A4B7C30563375FE02C05
Reporter abuse_ch
Tags:AgentTesla CVE-2017-11882 doc


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: suntradelc.com
Sending IP: 139.59.248.137
From: "Chen Yu- Shine Int’l (China) Limited" <shzopd3@htintl.net>
Reply-To: sofiqn.spp@gmail.com
Subject: RE: New inquiry / Offer CON 20-10630 victim-email
Attachment: SKM20012021.doc

Intelligence

File Origin
# of uploads :
1
# of downloads :
147
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SKM20012021.doc
Verdict:
Malicious activity
Analysis date:
2021-01-20 13:41:34 UTC
Tags:
exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/85c0244d-13f5-46aa-a3ed-72cbf3dd61a5

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
Creating a file in the %AppData% directory
Sending an HTTP GET request
Launching a file downloaded from the Internet
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/b6a7cb49d7be87043584fa415359964f96d151d86d6cf42100e46b52fa904cd4/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/586116
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Binary contains a suspicious time stamp
C2 URLs / IPs found in malware configuration
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
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
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)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 342091 Sample: SKM20012021.doc Startdate: 20/01/2021 Architecture: WINDOWS Score: 100 44 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->44 46 Found malware configuration 2->46 48 Yara detected AgentTesla 2->48 50 10 other signatures 2->50 7 EQNEDT32.EXE 11 2->7         started        12 tasksys.exe 2->12         started        14 tasksys.exe 2->14         started        16 2 other processes 2->16 process3 dnsIp4 38 185.244.219.92, 49167, 80 ON-LINE-DATAServerlocation-NetherlandsDrontenNL Ukraine 7->38 32 C:\Users\user\AppData\...\topboy87438.exe, PE32 7->32 dropped 34 C:\Users\user\AppData\...\topboyx[1].exe, PE32 7->34 dropped 58 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->58 18 topboy87438.exe 7->18         started        60 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->60 62 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 12->62 64 Injects a PE file into a foreign processes 12->64 21 tasksys.exe 2 12->21         started        23 tasksys.exe 2 14->23         started        25 tasksys.exe 14->25         started        file5 signatures6 process7 signatures8 52 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 18->52 54 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 18->54 56 Injects a PE file into a foreign processes 18->56 27 topboy87438.exe 1 4 18->27         started        process9 dnsIp10 40 smtp.kkwoodd.com 27->40 42 us2.smtp.mailhostbox.com 208.91.199.223, 49168, 587 PUBLIC-DOMAIN-REGISTRYUS United States 27->42 36 C:\Users\user\AppData\Roaming\...\tasksys.exe, PE32 27->36 dropped 66 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 27->66 68 Tries to steal Mail credentials (via file access) 27->68 70 Tries to harvest and steal ftp login credentials 27->70 72 2 other signatures 27->72 file11 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b6a7cb49d7be87043584fa415359964f96d151d86d6cf42100e46b52fa904cd4/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-01-20 13:42:07 UTC
AV detection:
19 of 45 (42.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w2t4wsoxx2dqinme7javgwmwj6lncuoynvwpiiia4rvvf6uqjtka._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
persistence ransomware
Link:
https://tria.ge/reports/210120-36t4ql76hj/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
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
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
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/b6a7cb49d7be87043584fa415359964f96d151d86d6cf42100e46b52fa904cd4

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:Ping_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
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

AgentTesla

Word file doc b6a7cb49d7be87043584fa415359964f96d151d86d6cf42100e46b52fa904cd4

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments