MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70. 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: 14

Intelligence 14 IOCs YARA 3 File information Comments 1

SHA256 hash:	1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70
SHA3-384 hash:	359737185f36f97938d37cae44e03c1bbeca7e07560ec63734a5051eada1ac4aabab4a2f0dd11f40b862c9f872b6c56b
SHA1 hash:	c61becaad6153e2205a8a91da3a287fb1c5b50cf
MD5 hash:	cdeb3c5e9de56d915ec7483032cf85da
humanhash:	lima-salami-red-mountain
File name:	cdeb3c5e9de56d915ec7483032cf85da
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	65'437 bytes
First seen:	2024-04-22 04:36:49 UTC
Last seen:	2024-04-22 05:19:32 UTC
File type:	rtf
MIME type:	text/rtf
ssdeep	1536:1FcsxzHp1LdS0UNW9THmjQZsi5lXuz4bc6DYmAR/IShFB1hvcAeKYmp:1FcsxzHp1LLUN8THmjQZL5lez4b01hFb
TLSH	T158538D2AE74F0925DF55967B434B4B4949FCB33DB28100A539BCA73437ADC2E4A2297C
Reporter	zbetcheckin
Tags:	AgentTesla CVE-2017-11882 rtf

Intelligence

File Origin

# of uploads :

# of downloads :

123

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

Mensajes en cuarentena (6).zip

Verdict:

Malicious activity

Analysis date:

2024-04-20 14:13:00 UTC

Tags:

spam exploit cve-2017-11882 stegocampaign loader evasion exfiltration stealer smtp agenttesla payload

Link:

https://app.any.run/tasks/26a17e67-43a6-4e46-bd5b-03a7c09b17d8

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Result

Verdict:

Malware

Maliciousness:

Behaviour

Connection attempt

Sending a custom TCP request

Creating a process with a hidden window

Creating a file

Launching a service

Searching for the window

Searching for synchronization primitives

Launching a process

Using the Windows Management Instrumentation requests

Creating a window

Sending an HTTP GET request

Creating a file in the %AppData% directory

Сreating synchronization primitives

DNS request

Connection attempt by exploiting the app vulnerability

Creating a process from a recently created file

Result

Verdict:

Malicious

File Type:

RTF File

Link:

https://app.docguard.net/1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70/results/dashboard

Behaviour

BlacklistAPI detected

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

embedequation exploit shellcode

Link:

https://www.filescan.io/uploads/6625e96ec5dabc22b2054836/reports/e10d8521-c951-430c-87a7-5fc52666af28/overview

Verdict:

Malicious

Labled as:

CVE-2017-11882

Link:

https://www.hybrid-analysis.com/sample/1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70

Result

Verdict:

MALICIOUS

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

spre.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1429435

Signature

Antivirus / Scanner detection for submitted sample

Check if machine is in data center or colocation facility

Connects to a pastebin service (likely for C&C)

Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)

Contains functionality to log keystrokes (.Net Source)

Document exploit detected (process start blacklist hit)

Found malware configuration

Injects a PE file into a foreign processes

Installs new ROOT certificates

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Office equation editor establishes network connection

Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)

Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)

Shellcode detected

Sigma detected: Base64 Encoded PowerShell Command Detected

Sigma detected: EQNEDT32.EXE connecting to internet

Sigma detected: Equation Editor Network Connection

Sigma detected: File Dropped By EQNEDT32EXE

Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands

Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet

Sigma detected: Powershell download and load assembly

Sigma detected: Powershell download payload from hardcoded c2 list

Sigma detected: Script Initiated Connection to Non-Local Network

Sigma detected: Suspicious Microsoft Office Child Process

Sigma detected: WScript or CScript Dropper

Snort IDS alert for network traffic

Suspicious execution chain found

Suspicious powershell command line found

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)

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

Wscript starts Powershell (via cmd or directly)

Yara detected AgentTesla

Yara detected Generic Downloader

Yara detected Powershell download and execute

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70

Detection:

cve-2017-11882-shellcode

Link:

https://mwdb.cert.pl/sample/1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70/

Threat name:

Document-RTF.Exploit.CVE-2017-11882

Status:

Malicious

First seen:

2024-04-19 11:23:56 UTC

File Type:

Document

Extracted files:

AV detection:

12 of 23 (52.17%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=dqejb2ynf2i2ibd2k5rx5ga3baobuz433tp73pds5wbgchv4hjya._file

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla keylogger spyware stealer trojan

Link:

https://tria.ge/reports/240422-e8s79sfe97/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Launches Equation Editor

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Office loads VBA resources, possible macro or embedded object present

Enumerates physical storage devices

Drops file in Windows directory

Drops file in System32 directory

Suspicious use of SetThreadContext

Looks up external IP address via web service

Blocklisted process makes network request

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/1c0890eb0d2e/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

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:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

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:	SUSP_INDICATOR_RTF_MalVer_Objects Create hunting rule
Author:	ditekSHen
Description:	Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:	https://github.com/ditekshen/detection

File information

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

Web download

AgentTesla

rtf 1c0890eb0d2e91a4047a57637e981b081c1a679bdcdffdbc72ed82611ebc3a70

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2821391/

Comments

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zbet commented on 2024-04-22 04:36:50 UTC

url : hxxp://192.3.216.151/morningfilewiththisisacompletetestedfilewhichtrulyworkedwellwithentireprocesscreatedgreatthingswithme__iamthegreatalwaysbefrabk.doc