MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4fc3df504d06a3814ed4a4db7d03616a0862992e20fbcde244a29ee84c69499e. 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


NanoCore


Vendor detections: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4fc3df504d06a3814ed4a4db7d03616a0862992e20fbcde244a29ee84c69499e
SHA3-384 hash: 48e5094f73c7737e06dd33488e40b70c27e918efc36ec16598c5a3f0e864931d346f2c4098e6fc315f32ea1eb7244691
SHA1 hash: 77d221d996d5adf10243cfb90032b0e91237764d
MD5 hash: fc8808bf04e3a0c989072478fdc6b3fc
humanhash: jig-mockingbird-cold-illinois
File name:Purchase Order.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:648'192 bytes
First seen:2020-08-19 14:08:06 UTC
Last seen:2020-08-19 14:45:19 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:17Ve+cR9XyEEP1PrVDihehbycY7yDAH5VfTX+85wXBDD04DY:HcvX5EP1DVDi2OwezOkwXB/t
Threatray 10'646 similar samples on MalwareBazaar
TLSH 71D4D1556446F1BBCB482FB1E092E7FC47B41214CD43DA0BB4D82B2DE53C7A92C9AE52
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: mail.fpcci.org.pk
Sending IP: 124.29.202.181
From: Li Wei <Li_Wei@saipuao.com>
Reply-To: purchasemd@yandex.com
Subject: New Order please treat ASAP
Attachment: Purchase Order.PDF (contains "Purchase Order.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
143
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/48604/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.34386240.29466.28626.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Unauthorized injection to a recently created process
Creating a window
Running batch commands
Creating a process with a hidden window
Sending a UDP request
Launching a process
Creating a file
Using the Windows Management Instrumentation requests
Reading critical registry keys
Stealing user critical data
Enabling autorun
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/438379
Signature
.NET source code contains potential unpacker
Creates an undocumented autostart registry key
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
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)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 271657 Sample: Purchase Order.exe Startdate: 20/08/2020 Architecture: WINDOWS Score: 88 38 Yara detected AgentTesla 2->38 40 .NET source code contains potential unpacker 2->40 42 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 2->42 44 4 other signatures 2->44 7 Purchase Order.exe 6 2->7         started        process3 file4 34 C:\Users\user\AppData\Local\...\name.exe.lnk, MS 7->34 dropped 36 C:\Users\user\AppData\Local\Temp\svhost.exe, PE32 7->36 dropped 48 Injects a PE file into a foreign processes 7->48 11 Purchase Order.exe 2 7->11         started        14 cmd.exe 1 7->14         started        16 cmd.exe 3 7->16         started        19 cmd.exe 1 7->19         started        signatures5 process6 file7 50 Tries to steal Mail credentials (via file access) 11->50 52 Tries to harvest and steal browser information (history, passwords, etc) 11->52 21 reg.exe 1 1 14->21         started        24 conhost.exe 14->24         started        30 C:\Users\user\AppData\Local\Temp\...\name.exe, PE32 16->30 dropped 26 conhost.exe 16->26         started        32 C:\Users\user\...\name.exe:Zone.Identifier, ASCII 19->32 dropped 28 conhost.exe 19->28         started        signatures8 process9 signatures10 46 Creates an undocumented autostart registry key 21->46
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4fc3df504d06a3814ed4a4db7d03616a0862992e20fbcde244a29ee84c69499e/
Threat name:
ByteCode-MSIL.Trojan.SmartAssembly
Create hunting rule
Status:
Malicious
First seen:
2020-08-19 13:41:43 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=j7b56ucna2ryctwuutnx2a3bniegfgjoed543yseukpoqtdjjgpa._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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e0dd9126e9038ec946d016833bad57afb1d3eb06e453ec8a0bdd60661e6a3da2
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e2934cd2d40fbf0b96782670d14b0c61b7a947af8be36580fb545613b6414967
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f3c6e6f5bf996841cc3777b0b3769e2092e5a85ad110b46764b45c3681793874
NanoCore
+ 10'636 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200819-v44xg78hla/
Behaviour
NTFS ADS
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla Payload
AgentTesla
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/4fc3df504d06a3814ed4a4db7d03616a0862992e20fbcde244a29ee84c69499e

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: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

NanoCore

rar 0792e7f8ee2bba6f9a222adf705bb186a27e01596555bfff489fdbccdf0a3b20

NanoCore

Executable exe 4fc3df504d06a3814ed4a4db7d03616a0862992e20fbcde244a29ee84c69499e

(this sample)

  
Dropped by
MD5 14b03b859a92b6cec63bac429733a28f
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/48604/
  
Dropped by
SHA256 0792e7f8ee2bba6f9a222adf705bb186a27e01596555bfff489fdbccdf0a3b20

Comments