MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 990df8e02a4bb9340ab3303a87f2939847653652d9b78819a253c8dde0ed056c. 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: 9


Intelligence 9 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 990df8e02a4bb9340ab3303a87f2939847653652d9b78819a253c8dde0ed056c
SHA3-384 hash: 1fec056ce12a338c0f42fb91f5ba4ee57b23044af7f53e5a8377c4c61cbeaf4634fde92b74133604f57b79ed183b6ac3
SHA1 hash: bbde59d80fbbde2d14c5d5a5bf12734e7534f2e8
MD5 hash: ef378bad278d95b87bb6337ad0375a72
humanhash: hydrogen-sodium-river-magnesium
File name:Quotation 2.PDF__________________________________.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:40'960 bytes
First seen:2021-03-03 06:17:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 768:oFOXuD9bNaFpPNGcSIncANa3MUxiNToIrTkWz:tGvxiNToIrTkI
TLSH 1803171436FE9049F6F37FBA2BE575CA8EAFBE725916D02B202043474531980CE66673
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: banabay.com
Sending IP: 185.29.8.55
From: Gio Fernandez <colombiama@banabay.com>
Subject: RE: quotations request
Attachment: Quotations.PDF__________________________________________________.r13 (contains "Quotation 2.PDF__________________________________.exe")

NanoCore RAT C2:
uiwsxnumhterwxcbnmowqacvyjngteaxctyhnbtyb.ydns.eu:5906

Intelligence

File Origin
# of uploads :
1
# of downloads :
140
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Quotation 2.PDF__________________________________.exe
Verdict:
No threats detected
Analysis date:
2021-03-03 06:24:16 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/9ec5edfe-1ccb-4133-8c70-f9414ac8f5bc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/121192/
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Sending an HTTP GET request
Creating a file
Moving a recently created file
Running batch commands
Creating a process with a hidden window
Launching a process
Unauthorized injection to a recently created process
Adding an access-denied ACE
Creating a window
Launching the default Windows debugger (dwwin.exe)
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Creating a file in the %temp% directory
Deleting a recently created file
Sending a custom TCP request
Sending a UDP request
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching a tool to kill processes
Enabling autorun by creating a file
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/625503
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Binary contains a suspicious time stamp
C2 URLs / IPs found in malware configuration
Contains functionality to hide a thread from the debugger
Detected Nanocore Rat
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides threads from debuggers
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Double Extension
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 361736 Sample: Quotation 2.PDF____________... Startdate: 03/03/2021 Architecture: WINDOWS Score: 100 72 uiwsxnumhterwxcbnmowqacvyjngteaxctyhnbtyb.ydns.eu 2->72 80 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->80 82 Found malware configuration 2->82 84 Malicious sample detected (through community Yara rule) 2->84 86 16 other signatures 2->86 9 Quotation 2.PDF__________________________________.exe 15 8 2->9         started        13 Quotation 2.PDF__________________________________.exe 3 2->13         started        15 dhcpmon.exe 2->15         started        17 dhcpmon.exe 2->17         started        signatures3 process4 dnsIp5 78 0k10dk21kkeok2e.online 172.67.179.188, 49714, 49721, 80 CLOUDFLARENETUS United States 9->78 90 Hides threads from debuggers 9->90 92 Injects a PE file into a foreign processes 9->92 19 Quotation 2.PDF__________________________________.exe 1 13 9->19         started        24 cmd.exe 1 9->24         started        26 WerFault.exe 23 9 9->26         started        28 Quotation 2.PDF__________________________________.exe 13->28         started        30 cmd.exe 13->30         started        36 2 other processes 13->36 32 cmd.exe 15->32         started        38 2 other processes 15->38 34 cmd.exe 17->34         started        signatures6 process7 dnsIp8 74 uiwsxnumhterwxcbnmowqacvyjngteaxctyhnbtyb.ydns.eu 104.250.163.196, 49720, 49724, 49729 VOXILITYGB United States 19->74 62 C:\Program Files (x86)\...\dhcpmon.exe, PE32 19->62 dropped 64 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 19->64 dropped 66 C:\Users\user\AppData\Local\...\tmpB640.tmp, XML 19->66 dropped 68 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 19->68 dropped 88 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->88 40 schtasks.exe 1 19->40         started        42 schtasks.exe 1 19->42         started        44 conhost.exe 24->44         started        46 timeout.exe 1 24->46         started        76 192.168.2.1 unknown unknown 26->76 70 Quotation 2.PDF___...___________.exe.log, ASCII 28->70 dropped 48 conhost.exe 30->48         started        50 timeout.exe 30->50         started        52 conhost.exe 32->52         started        54 timeout.exe 32->54         started        56 2 other processes 34->56 file9 signatures10 process11 process12 58 conhost.exe 40->58         started        60 conhost.exe 42->60         started       
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/990df8e02a4bb9340ab3303a87f2939847653652d9b78819a253c8dde0ed056c/
Threat name:
ByteCode-MSIL.Backdoor.NanoBot
Create hunting rule
Status:
Malicious
First seen:
2021-03-03 06:02:00 UTC
AV detection:
16 of 29 (55.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=teg7rybkjo4ticvtga5ip4uttbdwknss3g3yqgnckpen3yhnavwa._file
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/210303-n7sr9re5ss/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Kills process with taskkill
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in Program Files directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Deletes itself
NanoCore
Malware Config
C2 Extraction:
uiwsxnumhterwxcbnmowqacvyjngteaxctyhnbtyb.ydns.eu:5906
Unpacked files
SH256 hash:
990df8e02a4bb9340ab3303a87f2939847653652d9b78819a253c8dde0ed056c
MD5 hash:
ef378bad278d95b87bb6337ad0375a72
SHA1 hash:
bbde59d80fbbde2d14c5d5a5bf12734e7534f2e8
Link:
https://www.unpac.me/results/620b39d3-6f98-4a18-b02d-e9b6dfa5ba0e/
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/990df8e02a4bb9340ab3303a87f2939847653652d9b78819a253c8dde0ed056c

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_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time

File information

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

Malspam

NanoCore

zip 3398a1743d2bd1a4e2cafa6c0f45e016028e513aa6166928922beb667b594e9f

NanoCore

Executable exe 990df8e02a4bb9340ab3303a87f2939847653652d9b78819a253c8dde0ed056c

(this sample)

  
Dropped by
MD5 d1874c4b29c4e9ec7ba0d0d6cf11583a
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/121192/
  
Dropped by
SHA256 3398a1743d2bd1a4e2cafa6c0f45e016028e513aa6166928922beb667b594e9f

Comments