MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c66ebb40e5abd92b6a6985e8409116c5424ebb9af0c320cbafb031698e5022c. 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


AsyncRAT


Vendor detections: 8


Intelligence 8 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c66ebb40e5abd92b6a6985e8409116c5424ebb9af0c320cbafb031698e5022c
SHA3-384 hash: 399cbfd16d60f9164d84a1eef6f607fa71c2f93c2e9acaaad8647a11e807e4982e0d0e4adb8ed6652cb05d17f27a17d9
SHA1 hash: 3bd3b2dd8b8876c64bf528ee503c5ff2a893f897
MD5 hash: 072c089d4dbca02a4ae028d984f4cc03
humanhash: autumn-chicken-salami-april
File name:New Purchase Order.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:294'400 bytes
First seen:2020-09-03 20:11:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:/ZvrvR7/VBJLpqvzEKieKUJaYJhZJpcSacfh5+CpK+Ms:hvN72XJPJISaQ5+Qz
Threatray 444 similar samples on MalwareBazaar
TLSH 26546B91F3956CB3D82A1376CD768611222AFF9956B3830F344EB2255DB339324A3D4B
Reporter FORMALITYDE
Tags:AsyncRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
81
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AsyncRat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/55050/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a file
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a process from a recently created file
DNS request
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Connection attempt to an infection source
Enabling autorun by creating a file
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/459014
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Creates an undocumented autostart registry key
Executable has a suspicious name (potential lure to open the executable)
Initial sample is a PE file and has a suspicious name
Machine Learning detection for dropped file
Machine Learning detection for sample
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)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 281922 Sample: New Purchase Order.exe Startdate: 03/09/2020 Architecture: WINDOWS Score: 100 68 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->68 70 Multi AV Scanner detection for dropped file 2->70 72 Multi AV Scanner detection for submitted file 2->72 74 9 other signatures 2->74 10 New Purchase Order.exe 6 2->10         started        14 logs.exe 6 2->14         started        process3 file4 60 C:\Users\user\AppData\Roaming\...\vlc.exe, PE32 10->60 dropped 62 C:\Users\user\...\vlc.exe:Zone.Identifier, ASCII 10->62 dropped 64 C:\Users\user\...64ew Purchase Order.exe.log, ASCII 10->64 dropped 76 Creates an undocumented autostart registry key 10->76 16 New Purchase Order.exe 6 10->16         started        19 powershell.exe 25 10->19         started        21 New Purchase Order.exe 10->21         started        78 Multi AV Scanner detection for dropped file 14->78 80 Machine Learning detection for dropped file 14->80 23 powershell.exe 14->23         started        25 logs.exe 14->25         started        signatures5 process6 file7 58 C:\Users\user\AppData\Roaming\logs.exe, PE32 16->58 dropped 27 cmd.exe 1 16->27         started        29 cmd.exe 1 16->29         started        31 conhost.exe 19->31         started        33 conhost.exe 23->33         started        process8 process9 35 logs.exe 27->35         started        37 conhost.exe 27->37         started        39 timeout.exe 1 27->39         started        41 conhost.exe 29->41         started        43 schtasks.exe 1 29->43         started        45 conhost.exe 29->45         started        process10 47 logs.exe 35->47         started        50 powershell.exe 35->50         started        52 logs.exe 35->52         started        54 2 other processes 35->54 dnsIp11 66 freshg.ddns.net 185.244.30.167, 2256, 49725, 49730 DAVID_CRAIGGG Netherlands 47->66 56 conhost.exe 50->56         started        process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c66ebb40e5abd92b6a6985e8409116c5424ebb9af0c320cbafb031698e5022c/
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2020-09-03 16:09:58 UTC
AV detection:
26 of 29 (89.66%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jrtoxnaolk6zfnvgtbpiicirnrkcj25zv4gdedf27mbrnghfaiwa._file
Verdict:
suspicious
Similar samples:
1ca56622a5046a55fd09c9cdc61c262d9db3a009a88e0314e7bb9c64c973e9a7
AsyncRAT
258475fb4d0c7c39b4d702172b78d67fc9223792061729543c97d0950c396b5e
AsyncRAT
3832b8b199ec2a5c06dfc3ed80a489583043e6477668370861380ee5306d9e55
AsyncRAT
38b9013498f6ac6a5225581d76b4a6409dedaf605a3dfd38b5800d4bb2781370
AsyncRAT
4e343d50670d902ec99b2a4079f088249c3b6101d9754f763a77566af82e6f59
AsyncRAT
585e4146923404bbe11c2cf5a423e2650a5d133541e9baeacb64a4d675f6484d
AsyncRAT
97950fbe40dd26ac4eabd641e8bae0fc8f23ce04e3c4cf06ad5e451389b80556
AsyncRAT
b07177183a0f5cce808293132d98364a64495885d4bf1bbe7e2cdc39418d723d
AsyncRAT
cce8a02cb6b4a8e601af123a1ec418b1ed77228e3929121f9c3b42eda67b8d17
AsyncRAT
de5eead1472726c48bab2f8551a161fea3ccd71ee11b4df8e89aa5b9874832a3
AsyncRAT
+ 434 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
rat family:asyncrat
Link:
https://tria.ge/reports/200903-rl4jaaqm86/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Async RAT payload
AsyncRat
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4c66ebb40e5abd92b6a6985e8409116c5424ebb9af0c320cbafb031698e5022c

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:win_asyncrat_j1
Create hunting rule
Author:Johannes Bader @viql
Description:detects AsyncRAT

File information

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

Malspam

AsyncRAT

Executable exe 4c66ebb40e5abd92b6a6985e8409116c5424ebb9af0c320cbafb031698e5022c

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/55050/

Comments