MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef5b4a828d4322e2ca5681423488e03e9991191809fc068d80ce0bbeba792984. 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: 5


Intelligence 5 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef5b4a828d4322e2ca5681423488e03e9991191809fc068d80ce0bbeba792984
SHA3-384 hash: 3eb948fbff332f815f2fa2da5f99bc1e587458d467fed707069b279282ff6da807070263ff889d99aab9a846b9fa0e38
SHA1 hash: b0d2e8f668085ef770757c5498ba84f506285381
MD5 hash: a635c9a6dfa79affe8bf27cb4eae89d4
humanhash: king-eleven-lemon-muppet
File name:invoices-docs-view.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:449'536 bytes
First seen:2020-05-07 05:14:57 UTC
Last seen:2020-05-07 05:54:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'477 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:8iiiojhqTeWprgw/mRllf1MU2NuNoWMWIax+2GZKD8jFClmf:8iizjBA8wuRllft
Threatray 1'208 similar samples on MalwareBazaar
TLSH 0AA4AD9C362D71EED813C572CEE8AC74EA5074BA634B53679023419D9ACCD87CF249B2
Reporter jarumlus
Tags:NanoCore

Intelligence

File Origin
# of uploads :
2
# of downloads :
88
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Variant.Razy.552185.5002.28040.UNOFFICIAL
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Gathering data
Threat name:
ByteCode-MSIL.Trojan.Kryptik
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Status:
Malicious
First seen:
2020-05-07 05:39:21 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
27 of 31 (87.10%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=55nuvaunimrofsswqfbdjchah2mzcgiybh6andmazyf35otzfgca._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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24683ff5c436b2b56e96268ba4c591e8f80e9995623a0a1f6e6c7adf5bd2a62c
NanoCore
38701fe4b63d1436ba2e26cc7e268327299b58bcccbf074bfb2cbbcf57ceb2ea
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38814f6587d098be00d461dae2dfeb01b50e2a697d86bfc02e334024133bfed8
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4d13350ebf3d38475a0a4a8c223fe6c06e00af3585eb499f60e29639b3944d3f
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5c0f2a6b96505881c5cdb0c3c931ace0d2de9725e3094246973291ad5ca9d0e4
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756fde810887452ab2533283973f2e582df198988bcafde9f20dc85e35f4d5c4
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e29e9d9beb5ce8187decf038cdc0b1d3102b4cfe43715a3b4f934098a943ebed
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e7fa1cf008969a70a894b2947737b69c26abb63378d9d4305b698b223793029f
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ed6ea055c622adab41b5eba73b4d556c4c843b9e77e21933297ca0ce972ce5c4
NanoCore
fe7d67f2ca207d604740c8e66d22638049ca8a0c40818ad9f1d8515d6912f16d
NanoCore
+ 1'198 additional samples on MalwareBazaar
Result
Malware family:
nanocore
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Score:
  10/10
Tags:
family:nanocore coreentity evasion keylogger persistence rezer0 spyware stealer trojan
Link:
https://tria.ge/reports/201109-ngl6x19bfj/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
rezer0
CoreEntity .NET Packer
NanoCore
Malware Config
C2 Extraction:
79.134.225.89:12190
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:ach_NanoCore
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Author:abuse.ch
Rule name:Nanocore
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Author:JPCERT/CC Incident Response Group
Description:detect Nanocore in memory
Reference:internal research
Rule name:Nanocore_RAT_Feb18_1
Create hunting rule
Author:Florian Roth
Description:Detects Nanocore RAT
Reference:Internal Research - T2T
Rule name:Nanocore_RAT_Gen_2
Create hunting rule
Author:Florian Roth
Description:Detetcs the Nanocore RAT
Reference:https://www.sentinelone.com/blogs/teaching-an-old-rat-new-tricks/
Rule name:win_nanocore_w0
Create hunting rule
Author: Kevin Breen <kevin@techanarchy.net>

File information

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

Malspam

NanoCore

Executable exe ef5b4a828d4322e2ca5681423488e03e9991191809fc068d80ce0bbeba792984

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments