MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 76d13b1a6e1b48296fdcddcf02a20cf0a91c6965de75fda73cadb7fb2d6a06a8. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
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SHA256 hash: 76d13b1a6e1b48296fdcddcf02a20cf0a91c6965de75fda73cadb7fb2d6a06a8
SHA3-384 hash: 2e3889dc9d263cb50924912f404a22636c78fa5ab2e3530f6f9cd154c4646a7149cf298936fe44682f9a091c88453b54
SHA1 hash: 9d08b9db7faee101dd349fc3eb74c9f32ba254b7
MD5 hash: 304ea97fbce33796d67b40f05d1e3b87
humanhash: montana-yellow-fix-don
File name:CertUtil.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:112'128 bytes
First seen:2022-04-07 05:22:25 UTC
Last seen:2022-04-20 09:51:55 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 1536:tVCEpf9Fh5KHUbIWbFPbBrHQQU+iopiA+bHq0R4Co0s7yj7c0q1m:TSUvPbBL8YzCo8/c0q1m
Threatray 4'715 similar samples on MalwareBazaar
TLSH T1DDB3F6957E88F215C2692C76CB92C5F4C2B2BDA7DA22D5177DC43F6E7833A925001B07
File icon (PE):PE icon
dhash icon 3d7de4e1e1610d15 (7 x NanoCore, 5 x AgentTesla, 4 x SnakeKeylogger)
Reporter adm1n_usa32
Tags:dropper exe NanoCore

Intelligence

File Origin
# of uploads :
6
# of downloads :
782
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
nanocore
Create hunting rule
ID:
1
File name:
CertUtil.exe
Verdict:
Malicious activity
Analysis date:
2022-04-07 05:21:04 UTC
Tags:
opendir trojan nanocore rat
Link:
https://app.any.run/tasks/39dfbf23-9dbb-44bc-bca3-e19635df55cb

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/261559/
Detection(s):
SecuriteInfo.com.Trojan.DownloaderNET.358.12136.30609.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Launching a process
DNS request
Sending a custom TCP request
Creating a file in the %AppData% subdirectories
Creating a file
Creating a window
Creating a file in the Program Files subdirectories
Creating a file in the %temp% directory
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Sending an HTTP GET request to an infection source
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
certutil.exe obfuscated packed
Link:
https://www.filescan.io/uploads/624e7537d53a7479daca4f82/reports/e04a63af-2191-45a4-aacd-1f10d0c162e0/overview
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.
Malware family:
NanoCoreRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ef5f768c-b88c-41c0-a716-8b60b59aa027
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/972070
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Detected Nanocore Rat
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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: Suspicious Add Scheduled Task From User AppData Temp
Sigma detected: Suspicious Process Parents
Sigma detected: Windows Shell File Write to Suspicious Folder
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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)
Uses dynamic DNS services
Uses ping.exe to check the status of other devices and networks
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 604553 Sample: CertUtil.exe Startdate: 07/04/2022 Architecture: WINDOWS Score: 100 60 newnano03.ddns.net 2->60 70 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->70 72 Found malware configuration 2->72 74 Malicious sample detected (through community Yara rule) 2->74 76 17 other signatures 2->76 9 CertUtil.exe 15 7 2->9         started        14 dhcpmon.exe 4 2->14         started        16 dhcpmon.exe 3 2->16         started        18 MSBuild.exe 2 2->18         started        signatures3 process4 dnsIp5 68 136.144.41.109, 49770, 80 WORLDSTREAMNL Netherlands 9->68 54 C:\Users\user\AppData\...\certutil.exe, PE32 9->54 dropped 56 C:\Users\...\certutil.exe:Zone.Identifier, ASCII 9->56 dropped 58 C:\Users\user\AppData\...\CertUtil.exe.log, ASCII 9->58 dropped 84 System process connects to network (likely due to code injection or exploit) 9->84 86 Creates an undocumented autostart registry key 9->86 88 Writes to foreign memory regions 9->88 90 Injects a PE file into a foreign processes 9->90 20 MSBuild.exe 1 14 9->20         started        25 cmd.exe 1 9->25         started        27 conhost.exe 14->27         started        29 conhost.exe 16->29         started        31 conhost.exe 18->31         started        file6 signatures7 process8 dnsIp9 62 newnano03.ddns.net 37.0.11.76, 49776, 49779, 49781 WKD-ASIE Netherlands 20->62 64 192.168.2.1 unknown unknown 20->64 48 C:\Users\user\AppData\Roaming\...\run.dat, data 20->48 dropped 50 C:\Users\user\AppData\Local\...\tmpCA24.tmp, XML 20->50 dropped 52 C:\Program Files (x86)\...\dhcpmon.exe, PE32 20->52 dropped 78 Uses schtasks.exe or at.exe to add and modify task schedules 20->78 80 Hides that the sample has been downloaded from the Internet (zone.identifier) 20->80 33 schtasks.exe 1 20->33         started        35 schtasks.exe 1 20->35         started        82 Uses ping.exe to check the status of other devices and networks 25->82 37 PING.EXE 1 25->37         started        40 conhost.exe 25->40         started        42 timeout.exe 1 25->42         started        file10 signatures11 process12 dnsIp13 44 conhost.exe 33->44         started        46 conhost.exe 35->46         started        66 google.com 142.250.186.174 GOOGLEUS United States 37->66 process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/76d13b1a6e1b48296fdcddcf02a20cf0a91c6965de75fda73cadb7fb2d6a06a8/
Threat name:
ByteCode-MSIL.Trojan.Mardom
Create hunting rule
Status:
Malicious
First seen:
2022-03-23 09:29:34 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=o3itwgtodnecs3643xhqfiqm6cury2lf3z273jz4vw37wllka2ua._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
0610cb3a060ef7b21f8346e3aaba432daa7dd55553832c53aca23f76af695333
NanoCore
0b1396805e736275f16550f3ecc5361cfcccc468094b4ea910ded8eaf430a5b3
NanoCore
263565e9f77b5ee48474855d471315dd56d1bcabe4d037fb380d404b3afcd14e
NanoCore
45272694709263868523b77d0561757378cc2e8aa7d64c7ed21deaacbdf88b5b
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862965d573744607a29489905cfc8abdd8f187874d476ef4263eee7e5175630a
NanoCore
8bf0518cd0c607aa51073dfe422f6af43ab8b43523bd0c182cc6172c9ecb9072
NanoCore
a30622ef748dbcae11f6a12cf32c096527e55364b32ae546ea1b729c121128ee
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adac602d329a95580921b519350a4eefa10c98f593b6be76855b31d8bea64909
NanoCore
b771e6a9cb56600b3cb46440bd7af362598c9904350163754898505d35cff4ad
NanoCore
+ 4'705 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/220407-f247macab6/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
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 SetThreadContext
Adds Run key to start application
Checks computer location settings
NanoCore
Malware Config
C2 Extraction:
newnano03.ddns.net:6991
Unpacked files
SH256 hash:
76d13b1a6e1b48296fdcddcf02a20cf0a91c6965de75fda73cadb7fb2d6a06a8
MD5 hash:
304ea97fbce33796d67b40f05d1e3b87
SHA1 hash:
9d08b9db7faee101dd349fc3eb74c9f32ba254b7
Link:
https://www.unpac.me/results/e3eee690-5ee4-48d8-848b-be1ca9a3177a/
Malware family:
NanoCore
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/76d13b1a6e1b/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Nanocore
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/76d13b1a6e1b48296fdcddcf02a20cf0a91c6965de75fda73cadb7fb2d6a06a8

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:pe_imphash
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Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/261559/

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