MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dc9b8828197d36f63999e8835193ef7bf23091fae5216c375059dc168432f3b9. 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: 10


Intelligence 10 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: dc9b8828197d36f63999e8835193ef7bf23091fae5216c375059dc168432f3b9
SHA3-384 hash: 6754950f19886c7adae972b2472e694c777b7005b0c5bdf00652e721b5abecf5b6422ccf310d8290823d14af9f3752f8
SHA1 hash: 3b9cf1f4dd3b54f2079d7b8d685fa706a4ce07f2
MD5 hash: 74e68b6a42979325bd62d83df2037c45
humanhash: fifteen-nitrogen-early-enemy
File name:Purchase Order.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:182'784 bytes
First seen:2020-12-14 14:10:46 UTC
Last seen:2020-12-14 15:39:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'751 x AgentTesla, 19'657 x Formbook, 12'248 x SnakeKeylogger)
ssdeep 768:Ga1aSPmZboTiOEWHemqgvsIP4idEjgi0okii9:Ga1aSOZboTinWd4idEjgi0okii9
Threatray 512 similar samples on MalwareBazaar
TLSH 3A047EFB790C74E6EC412274180BBC580114AC31BB7347BD63F1BA9966B2ABC97365D2
Reporter James_inthe_box
Tags:exe NanoCore

Intelligence

File Origin
# of uploads :
2
# of downloads :
182
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Purchase Order.exe
Verdict:
Malicious activity
Analysis date:
2020-12-14 14:17:44 UTC
Tags:
trojan rat asyncrat stealer avemaria nanocore quasar evasion
Link:
https://app.any.run/tasks/e405098c-c933-4c8b-b0cd-69b959461e4a

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/107964/
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Generic.cz.9420.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Running batch commands
Creating a process with a hidden window
Launching a process
DNS request
Sending a UDP request
Adding an access-denied ACE
Creating a file
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a process from a recently created file
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Reading critical registry keys
Sending a TCP request to an infection source
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun by creating a file
Enabling autorun
Result
Gathering data
Result
Threat name:
Nanocore AsyncRAT AveMaria LimeRAT Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/562190
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
Connects to a pastebin service (likely for C&C)
Connects to many ports of the same IP (likely port scanning)
Contains functionality to hide a thread from the debugger
Contains functionality to hide user accounts
Creates an undocumented autostart registry key
Creates autostart registry keys with suspicious names
Creates multiple autostart registry keys
Detected Nanocore Rat
Drops PE files to the startup folder
Executable has a suspicious name (potential lure to open the executable)
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)
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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)
Tries to harvest and steal browser information (history, passwords, etc)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM_3
Yara detected AsyncRAT
Yara detected AveMaria stealer
Yara detected Costura Assembly Loader
Yara detected LimeRAT
Yara detected Nanocore RAT
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 330185 Sample: Purchase Order.exe Startdate: 14/12/2020 Architecture: WINDOWS Score: 100 102 kenmolle.ddns.net 2->102 104 pastebin.com 2->104 106 2 other IPs or domains 2->106 120 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->120 122 Malicious sample detected (through community Yara rule) 2->122 124 Antivirus detection for dropped file 2->124 126 24 other signatures 2->126 11 Purchase Order.exe 18 5 2->11         started        16 Purchase Order.exe 3 2->16         started        18 Msbuildhost.exe 2->18         started        20 2 other processes 2->20 signatures3 process4 dnsIp5 108 hastebin.com 104.24.126.89, 443, 49721, 49724 CLOUDFLARENETUS United States 11->108 96 C:\Users\user\AppData\...\Purchase Order.exe, PE32 11->96 dropped 98 C:\...\Purchase Order.exe:Zone.Identifier, ASCII 11->98 dropped 128 Creates an undocumented autostart registry key 11->128 130 Creates multiple autostart registry keys 11->130 132 Hides threads from debuggers 11->132 22 Purchase Order.exe 7 11->22         started        25 cmd.exe 1 11->25         started        27 WerFault.exe 23 9 11->27         started        134 Injects a PE file into a foreign processes 16->134 29 Purchase Order.exe 16->29         started        33 cmd.exe 16->33         started        35 WerFault.exe 16->35         started        110 192.168.2.1 unknown unknown 18->110 136 Multi AV Scanner detection for dropped file 18->136 138 Machine Learning detection for dropped file 18->138 140 Drops PE files to the startup folder 18->140 37 cmd.exe 18->37         started        41 2 other processes 18->41 142 Creates autostart registry keys with suspicious names 20->142 39 cmd.exe 20->39         started        file6 signatures7 process8 dnsIp9 84 C:\Users\user\AppData\...\Msbuildhost.exe, PE32 22->84 dropped 86 C:\Users\user\...\Purchase Order.exe.log, ASCII 22->86 dropped 43 cmd.exe 1 22->43         started        45 cmd.exe 1 22->45         started        47 conhost.exe 25->47         started        49 timeout.exe 1 25->49         started        112 kenmolle.ddns.net 104.129.26.162, 4782, 49743, 49748 ASN-QUADRANET-GLOBALUS United States 29->112 114 192.168.2.3, 443, 4782, 49342 unknown unknown 29->114 88 C:\Users\user\AppData\Local\Temp\vhsvcp.exe, PE32 29->88 dropped 90 C:\Users\user\AppData\Local\Temp\swusor.exe, PE32 29->90 dropped 92 C:\Users\user\AppData\Local\Temp\submac.exe, PE32 29->92 dropped 94 C:\Users\user\AppData\Local\Temp\eljrfq.exe, PE32 29->94 dropped 144 Tries to harvest and steal browser information (history, passwords, etc) 29->144 51 conhost.exe 33->51         started        53 timeout.exe 33->53         started        55 conhost.exe 37->55         started        57 timeout.exe 37->57         started        59 2 other processes 39->59 file10 signatures11 process12 process13 61 Msbuildhost.exe 43->61         started        66 conhost.exe 43->66         started        68 timeout.exe 1 43->68         started        70 conhost.exe 45->70         started        72 schtasks.exe 1 45->72         started        dnsIp14 116 104.24.127.89, 443, 49726, 49735 CLOUDFLARENETUS United States 61->116 118 hastebin.com 61->118 100 C:\Users\user\AppData\...\Msbuildhost.exe, PE32 61->100 dropped 146 Creates multiple autostart registry keys 61->146 148 Hides threads from debuggers 61->148 150 Injects a PE file into a foreign processes 61->150 74 cmd.exe 61->74         started        76 Msbuildhost.exe 61->76         started        78 WerFault.exe 61->78         started        file15 signatures16 process17 process18 80 conhost.exe 74->80         started        82 timeout.exe 74->82         started       
Detection:
avemaria
Create hunting rule
Link:
https://mwdb.cert.pl/sample/dc9b8828197d36f63999e8835193ef7bf23091fae5216c375059dc168432f3b9/
Threat name:
ByteCode-MSIL.Backdoor.Crysan
Create hunting rule
Status:
Malicious
First seen:
2020-12-14 14:10:39 UTC
File Type:
PE (.Net Exe)
Extracted files:
18
AV detection:
12 of 28 (42.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=3snyqkazpu3pmomz5cbvde7pppzdbep24uqwyn2qlhobnbbs6o4q._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Similar samples:
0a9e7542b65b3a7c5e1a11a2b23c2366fd53bff3205bb9d1656d4e32d1f0068b
NanoCore
2265d18a36231a2141dc86a9dd49ef5538ab7f0509cad1459e5d11ccaeb15020
NanoCore
2c8c5c5e5990da4a2af218cfece6afda3f4830be6605b9767adbfbde2e5cd276
NanoCore
395fdb688d7d8085e2636fb26e7e4d5004ae3ec20db26edeee1e0a19d5872e07
NanoCore
65c205b93cf9c6d9e9acd5336e010a43309688bfc2e28cffbb5ba8973757fd49
NanoCore
68bf0a42854ac13fe13a75bb213f51934a3edc0fa7a0732ddb12a68699619474
NanoCore
867eb496d9f6122024560c00e0a2fde238fed90558dd0b4b838047c8eed8196c
NanoCore
8dd3b9fb0158903433d23f879d07820b8110a4b6417f3deda72342c2f698384e
NanoCore
c853a4beac9f6fcea2bb9ad13b17eafd6605cac76899edbecd88d4f981d9f432
NanoCore
fc926b2871dc293ad75ff0caf3863adc75b9342a34c1965c3991f512a2f666c8
NanoCore
+ 502 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat family:nanocore keylogger persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/201214-rx5w5bj7ca/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Drops startup file
Reads user/profile data of web browsers
Executes dropped EXE
Async RAT payload
ServiceHost packer
Modifies WinLogon for persistence
AsyncRat
NanoCore
Malware Config
C2 Extraction:
kenmolle.ddns.net:8809
kenmolle.ddns.net:2222
kenmolle.ddns.net:9899
kenmolle.ddns.net:2131
:8809
:2222
:9899
:2131
kenmolle.ddns.net:54987
127.0.0.1:54987
Unpacked files
SH256 hash:
dc9b8828197d36f63999e8835193ef7bf23091fae5216c375059dc168432f3b9
MD5 hash:
74e68b6a42979325bd62d83df2037c45
SHA1 hash:
3b9cf1f4dd3b54f2079d7b8d685fa706a4ce07f2
Link:
https://www.unpac.me/results/4de6682b-d59a-4b7f-a873-49613903562e/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.69
Link:
https://yomi.yoroi.company/submissions/dc9b8828197d36f63999e8835193ef7bf23091fae5216c375059dc168432f3b9

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:asyncrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
Rule name:Reverse_text_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Reverse text detected
Rule name:win_asyncrat_j1
Create hunting rule
Author:Johannes Bader @viql
Description:detects AsyncRAT
Rule name:win_asyncrat_w0
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research

File information

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

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/107964/

Comments