MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a7d71b128d7e8366f7e2fd8002f971c490575ea8fcc15bd571152db97f7b26f3. 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 1 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a7d71b128d7e8366f7e2fd8002f971c490575ea8fcc15bd571152db97f7b26f3
SHA3-384 hash: ab34b093935c57db50b66329fad0fb7d0a2ca350b77f6ff6f6d8e09c34c488dafb8005d897ec998c613aa58a9459cc00
SHA1 hash: a15d9f248f053608ef66e9ea8777efccee821050
MD5 hash: 3c9425647a62ea7bef0fffdb94c393e8
humanhash: kansas-chicken-mango-carolina
File name:Re R new proforma.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:1'143'296 bytes
First seen:2021-05-28 14:36:55 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 24576:8/P6kmIckj7swbRm3ld23AVUDs5v/dIsk:98j77Vm1duWQ8/
Threatray 2 similar samples on MalwareBazaar
TLSH 79358D2D12A4172AE179D3BC88D05433A3F1BD13B256EE995CC13FA53672785B98323E
Reporter Anonymous
Tags:NanoCore


Avatar
Anonymous
Part of ACE archive

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
185.140.53.138:5230 https://threatfox.abuse.ch/ioc/66768/

Intelligence

File Origin
# of uploads :
1
# of downloads :
167
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Re R new proforma.exe
Verdict:
No threats detected
Analysis date:
2021-05-28 14:42:09 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/1287d9f7-ba68-4ed0-a045-fb187df34347

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Nanocore
Create hunting rule
Link:
https://www.capesandbox.com/analysis/162982/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.763-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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/793894
Signature
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
C2 URLs / IPs found in malware configuration
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Sigma detected: NanoCore
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 426290 Sample: Re R new proforma.exe Startdate: 28/05/2021 Architecture: WINDOWS Score: 100 60 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->60 62 Found malware configuration 2->62 64 Malicious sample detected (through community Yara rule) 2->64 66 11 other signatures 2->66 7 Re R new proforma.exe 7 2->7         started        11 dhcpmon.exe 2->11         started        process3 file4 46 C:\Users\user\AppData\Roaming46LeyLKs.exe, PE32 7->46 dropped 48 C:\Users\user\AppData\Local\...\tmpDA7F.tmp, XML 7->48 dropped 68 Adds a directory exclusion to Windows Defender 7->68 70 Injects a PE file into a foreign processes 7->70 13 Re R new proforma.exe 7->13         started        18 powershell.exe 26 7->18         started        20 powershell.exe 24 7->20         started        30 2 other processes 7->30 22 powershell.exe 11->22         started        24 schtasks.exe 11->24         started        26 powershell.exe 11->26         started        28 dhcpmon.exe 11->28         started        signatures5 process6 dnsIp7 56 emedoo.ddns.net 185.140.53.138, 49747, 49750, 49753 DAVID_CRAIGGG Sweden 13->56 58 192.168.2.1 unknown unknown 13->58 50 C:\Program Files (x86)\...\dhcpmon.exe, PE32 13->50 dropped 52 C:\Users\user\AppData\Roaming\...\run.dat, data 13->52 dropped 54 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 13->54 dropped 72 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->72 32 conhost.exe 18->32         started        34 conhost.exe 20->34         started        36 conhost.exe 22->36         started        38 conhost.exe 24->38         started        40 conhost.exe 26->40         started        42 conhost.exe 30->42         started        44 conhost.exe 30->44         started        file8 signatures9 process10
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a7d71b128d7e8366f7e2fd8002f971c490575ea8fcc15bd571152db97f7b26f3/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2021-05-28 14:37:08 UTC
AV detection:
11 of 29 (37.93%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=u7lrweunp2bwn57c7waaf6lrysifoxvi7tavxvlrcuw3s733e3zq._file
Verdict:
unknown
Similar samples:
5a1c59664608fbf4b0079b61e18f0cc56afd551642c2ecc16bca995c8b6ed38a
NanoCore
aa061712833434c40871093a476fb1743c83b3b05f5325f68f58f33e91ba3e36
NanoCore
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/210528-rjsrgdx7a2/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
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
NanoCore
Malware Config
C2 Extraction:
emedoo.ddns.net:5230
127.0.0.1:5230
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/a7d71b128d7e8366f7e2fd8002f971c490575ea8fcc15bd571152db97f7b26f3

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
Create hunting rule
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.

  
Delivery method
Distributed via e-mail link
Cape
Cape
https://www.capesandbox.com/analysis/162982/

Comments