MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ff4a09040a95516e54bc22554dbe82e7f280279ea38236b98f43afbd0c85719d. 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: 13


Intelligence 13 IOCs YARA 5 File information Comments
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SHA256 hash: ff4a09040a95516e54bc22554dbe82e7f280279ea38236b98f43afbd0c85719d
SHA3-384 hash: ca7c7410481dafb31d919fac5b1e1127c0ef84587fc215d430937e534e98fec0d766e0d4dfb3e72fc15a5d173f6c2e1f
SHA1 hash: 3ad4bcc545bb0f30a2baa402d2f99ae7a382f76c
MD5 hash: 4c742885047d950b3ec55ad85c6861e3
humanhash: blue-arkansas-ink-robin
File name:proforma invoice.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:42'496 bytes
First seen:2022-03-17 06:53:02 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 768:XgEfF+SWK8iFe6Z7gHpvAfu/QZp92vOp9y:NtHWXJWQvVST2vr
Threatray 4'398 similar samples on MalwareBazaar
TLSH T1B9134B82E74DC315E8AB433B8477DE40035FEE267491953E7895760B6E73342E8EA60B
File icon (PE):PE icon
dhash icon e0e4a3a6a4b8b8a8 (37 x Formbook, 9 x AZORult, 9 x Loki)
Reporter GovCERT_CH
Tags:exe NanoCore

Intelligence

File Origin
# of uploads :
1
# of downloads :
263
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
nanocore
Create hunting rule
ID:
1
File name:
proforma invoice.exe
Verdict:
Malicious activity
Analysis date:
2022-03-17 07:10:31 UTC
Tags:
rat nanocore trojan
Link:
https://app.any.run/tasks/7e8d370c-5082-42ec-9b2f-d39c64ebbe32

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/251755/
Detection(s):
SecuriteInfo.com.Trojan.Downloader.10124.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Sending a custom TCP request
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a file
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/6232dad00cd58dbd92ac6245/reports/fa6571e2-3d35-46ce-92ba-ae2dcf581e4e/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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/671fe929-c859-4d6b-a8f4-af4073929ca6
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/958491
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Detected Nanocore Rat
Executable has a suspicious name (potential lure to open the executable)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: NanoCore
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected MSILDownloaderGeneric
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 590972 Sample: proforma invoice.exe Startdate: 17/03/2022 Architecture: WINDOWS Score: 100 49 Multi AV Scanner detection for domain / URL 2->49 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 17 other signatures 2->55 7 proforma invoice.exe 16 7 2->7         started        12 dhcpmon.exe 2 2->12         started        process3 dnsIp4 41 cdn.discordapp.com 162.159.130.233, 443, 49768 CLOUDFLARENETUS United States 7->41 31 C:\Users\user\AppData\Local\...31vwhmm.exe, PE32 7->31 dropped 33 C:\Users\user\...\proforma invoice.exe.log, ASCII 7->33 dropped 35 C:\Users\user\...35vwhmm.exe:Zone.Identifier, ASCII 7->35 dropped 57 Creates an undocumented autostart registry key 7->57 59 Writes to foreign memory regions 7->59 61 Allocates memory in foreign processes 7->61 63 Injects a PE file into a foreign processes 7->63 14 RegAsm.exe 1 11 7->14         started        19 cmd.exe 1 7->19         started        21 RegAsm.exe 7->21         started        25 2 other processes 7->25 23 conhost.exe 12->23         started        file5 signatures6 process7 dnsIp8 43 37.0.11.164, 49787, 49797, 49810 WKD-ASIE Netherlands 14->43 45 papakamzy.ddns.net 188.241.80.25, 49777, 49783, 49785 SAFEGRIDRO Romania 14->45 37 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 14->37 dropped 39 C:\Program Files (x86)\...\dhcpmon.exe, PE32 14->39 dropped 47 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->47 27 conhost.exe 19->27         started        29 timeout.exe 1 19->29         started        file9 signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ff4a09040a95516e54bc22554dbe82e7f280279ea38236b98f43afbd0c85719d/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-03-17 06:53:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
18
AV detection:
17 of 27 (62.96%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=75fasbaksviw4vf4ejku3puc47ziaj46uobdnompiox32defogoq._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
263565e9f77b5ee48474855d471315dd56d1bcabe4d037fb380d404b3afcd14e
NanoCore
4f7da7d6fb331a8098d4ce354690ffc64d8f0225307b406e722548109e669d4d
NanoCore
55aea4a4530e0aa4d13d4c68b9027e6a215bc4a4eaa87d2a8bfdc2c443dd3d7c
NanoCore
862965d573744607a29489905cfc8abdd8f187874d476ef4263eee7e5175630a
NanoCore
c59c8e3be7ec42553ff6af2588e3bcd0569e9467dbb9307218fb8724e02739f2
NanoCore
db7d1bc1cf6fb7fdbc3d0fc2c67c97ed89aa316d6bcb4c4e6ce942c9145612fc
NanoCore
+ 4'388 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer suricata trojan
Link:
https://tria.ge/reports/220317-hnm3asabbm/
Behaviour
Delays execution with timeout.exe
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Checks computer location settings
Modifies WinLogon for persistence
NanoCore
suricata: ET MALWARE Possible NanoCore C2 60B
Malware Config
C2 Extraction:
papakamzy.ddns.net:7600
37.0.11.164:7600
Unpacked files
SH256 hash:
ff4a09040a95516e54bc22554dbe82e7f280279ea38236b98f43afbd0c85719d
MD5 hash:
4c742885047d950b3ec55ad85c6861e3
SHA1 hash:
3ad4bcc545bb0f30a2baa402d2f99ae7a382f76c
Link:
https://www.unpac.me/results/45e86030-91ad-461c-98f5-401b9ef91c9f/
Malware family:
NanoCore
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ff4a09040a95/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.55
Link:
https://yomi.yoroi.company/submissions/ff4a09040a95516e54bc22554dbe82e7f280279ea38236b98f43afbd0c85719d

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_EXE_DiscordURL
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Author:ditekSHen
Description:Detects executables Discord URL observed in first stage droppers
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:SUSP_Discord_Attachments_URL
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects a PE file that contains an Discord Attachments URL. This is often used by Malware to download further payloads
Rule name:SUSP_PE_Discord_Attachment_Oct21_1
Create hunting rule
Author:Florian Roth
Description:Detects suspicious executable with reference to a Discord attachment (often used for malware hosting on a legitimate FQDN)
Reference:Internal Research

File information

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

Malspam

NanoCore

Executable exe ff4a09040a95516e54bc22554dbe82e7f280279ea38236b98f43afbd0c85719d

(this sample)

  
Dropped by
nanocore
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/251755/

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