MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b7403e3876b60e4fcea67df1ad6d56e7f930425b7bb9aaff85c95aa7a5c70fab. 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: 6


Intelligence 6 IOCs YARA 4 File information Comments
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SHA256 hash: b7403e3876b60e4fcea67df1ad6d56e7f930425b7bb9aaff85c95aa7a5c70fab
SHA3-384 hash: c5cb33ff5d4fbae9c040b4c82d11c6f5b87c2acb80e3a5917d9177b0c3a1db190f1b2369508d69acd7fc64d5538887a3
SHA1 hash: 63d404e6fd640edc2356c72f037b9d6852cc37b0
MD5 hash: 1e3326ed5d61f505462ec040f0d4fca7
humanhash: kentucky-muppet-five-lemon
File name:PO.xls
Download: download sample
Signature AgentTesla
Create hunting rule
File size:165'888 bytes
First seen:2020-08-03 13:05:14 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:ck3hOdsylKlgryzc4bNhZFGzE+cL2knPKKWXQ3kl/GJMfliRx4J2iSAqsaHHCa04:ck3hOdsylKlgryzc4bNhZF+E+W2knP/X
TLSH AAF3E1B3B6669D81DE72073C0BF956015713AD1E23A6C55AB334FB9F7F7048089C291A
Reporter abuse_ch
Tags:AgentTesla xls


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: bd.bidsbd.link
Sending IP: 192.254.160.121
From: G Nolasco ~ Director <info@bids.org.bd>
Subject: revised order
Attachment: PO.xls

AgentTesla payload URL:
https://a.uguu.se/clrhty.jpg

AgentTesla SMTP exfil server:
smtp.flexiitankpack.com:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
77
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.VBS.Downloader-35.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.FormbookClamAVTrivaMurderParty.20200731.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a TCP request to an infection source by exploiting the app vulnerability
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/407937
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Creates an autostart registry key pointing to binary in C:\Windows
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to HTTP operations
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Drops PE files to the user root directory
Injects a PE file into a foreign processes
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office process drops PE file
Sigma detected: Add file from suspicious location to autostart registry
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: MS Office Product Spawning Exe in User Dir
Sigma detected: Suspicious Program Location Process Starts
Writes to foreign memory regions
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 256206 Sample: PO.xls Startdate: 03/08/2020 Architecture: WINDOWS Score: 100 46 Document exploit detected (drops PE files) 2->46 48 Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros) 2->48 50 Yara detected AgentTesla 2->50 52 10 other signatures 2->52 8 EXCEL.EXE 34 43 2->8         started        13 pcalua.exe 1 2->13         started        15 pcalua.exe 1 1 2->15         started        process3 dnsIp4 44 a.uguu.se 144.76.201.136, 443, 49739 HETZNER-ASDE Germany 8->44 40 C:\Users\user\AppData\Local\...\clrhty[1].jpg, PE32 8->40 dropped 42 C:\Users\Public\svchost32.exe, PE32 8->42 dropped 60 Document exploit detected (creates forbidden files) 8->60 62 Document exploit detected (process start blacklist hit) 8->62 17 svchost32.exe 6 8->17         started        20 splwow64.exe 8->20         started        22 AppFileData.exe 3 13->22         started        file5 signatures6 process7 file8 36 C:\Users\user\AppData\...\AppFileData.exe, PE32 17->36 dropped 38 C:\Users\user\AppData\Local\Temp\RegAsm.exe, PE32 17->38 dropped 24 AppFileData.exe 17->24         started        27 cmd.exe 1 17->27         started        process9 signatures10 54 Writes to foreign memory regions 24->54 56 Allocates memory in foreign processes 24->56 58 Injects a PE file into a foreign processes 24->58 29 RegAsm.exe 24->29         started        31 reg.exe 1 1 27->31         started        34 conhost.exe 27->34         started        process11 signatures12 64 Creates an autostart registry key pointing to binary in C:\Windows 31->64
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b7403e3876b60e4fcea67df1ad6d56e7f930425b7bb9aaff85c95aa7a5c70fab/
Threat name:
Script-Macro.Downloader.Donoff
Create hunting rule
Status:
Malicious
First seen:
2020-08-03 13:07:04 UTC
AV detection:
17 of 29 (58.62%)
Threat level:
  3/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=w5ad4odwwyhe7tvgpxy223kw474taqs3po42v74fzfnkpjohb6vq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/200803-1blwbhtysn/
Behaviour
Suspicious Office macro
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Dropper
Score:
0.80
Link:
https://yomi.yoroi.company/submissions/b7403e3876b60e4fcea67df1ad6d56e7f930425b7bb9aaff85c95aa7a5c70fab

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:Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:CAP_HookExKeylogger
Create hunting rule
Author:Brian C. Bell -- @biebsmalwareguy
Reference:https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:win_agent_tesla_w1
Create hunting rule
Author:govcert_ch
Description:Detect Agent Tesla based on common .NET code sequences

File information

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

Malspam

AgentTesla

Excel file xls b7403e3876b60e4fcea67df1ad6d56e7f930425b7bb9aaff85c95aa7a5c70fab

(this sample)

AgentTesla

Executable exe dbced135a4f7bdf17c4d3c478b12a765c4da52ae19347bc152c904d2f60a01d1

  
URLhaus
https://urlhaus.abuse.ch/url/423778/
  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 dbced135a4f7bdf17c4d3c478b12a765c4da52ae19347bc152c904d2f60a01d1
  
Dropping
MD5 fe85c072df58d7d55d23e0e6b8a5a272

Comments