MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5. 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: 7


Intelligence 7 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5
SHA3-384 hash: 66145cb53a3fe2f93537343cd062fd64c10934f569ef330cdc7552cb0d7f3496c567294bd5935312953234b98cc63b7e
SHA1 hash: 7218ab8b9e02553b466361c043caa09a350e42b2
MD5 hash: 68d23586eef34a76a3e58cfc1bfdcb80
humanhash: hotel-bacon-mars-helium
File name:nUt8Eiji.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:46'080 bytes
First seen:2020-09-26 20:47:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'462 x Formbook, 12'203 x SnakeKeylogger)
ssdeep 768:nugaNTokqd97WUHgAKpmo2q7HKjGKG6PIyzjbFgX3iUaLtlW8XHBWBDZ/x:nugaNToTdQT2mKYDy3bCXSFtl5x4d/x
Threatray 319 similar samples on MalwareBazaar
TLSH 6A232C003BE8822BF2BE4F789CF26245467AF2636603D5492CC451DB5713FC69A426FE
Reporter pmelson
Tags:AsyncRAT exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
188
Origin country :
n/a
Vendor Threat Intelligence
Gathering data
Detection(s):
Win.Packed.Samas-7998113-0
Create hunting rule

Win.Packed.Samas-8025724-0
Create hunting rule

Win.Packed.Razy-9625918-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
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 file
Launching a process
Creating a process from a recently created file
DNS request
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Unauthorized injection to a recently created process
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/475897
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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 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: 290398 Sample: nUt8Eiji.exe Startdate: 26/09/2020 Architecture: WINDOWS Score: 100 50 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->50 52 Antivirus / Scanner detection for submitted sample 2->52 54 Multi AV Scanner detection for submitted file 2->54 56 4 other signatures 2->56 7 MicrosoftService.exe 1 5 2->7         started        11 nUt8Eiji.exe 7 2->11         started        process3 dnsIp4 44 2.tcp.eu.ngrok.io 18.157.68.73, 15558, 49732, 49757 AMAZON-02US United States 7->44 46 127.0.0.1 unknown unknown 7->46 48 192.168.2.1 unknown unknown 7->48 58 Antivirus detection for dropped file 7->58 60 Multi AV Scanner detection for dropped file 7->60 62 Machine Learning detection for dropped file 7->62 14 cmd.exe 1 7->14         started        16 cmd.exe 1 7->16         started        40 C:\Users\user\...\MicrosoftService.exe, PE32 11->40 dropped 42 C:\Users\user\AppData\...\nUt8Eiji.exe.log, ASCII 11->42 dropped 18 cmd.exe 1 11->18         started        20 cmd.exe 1 11->20         started        file5 signatures6 process7 process8 22 conhost.exe 14->22         started        24 timeout.exe 1 14->24         started        26 conhost.exe 16->26         started        28 schtasks.exe 1 16->28         started        30 MicrosoftService.exe 3 18->30         started        32 conhost.exe 18->32         started        34 timeout.exe 1 18->34         started        36 conhost.exe 20->36         started        38 schtasks.exe 1 20->38         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5/
Threat name:
ByteCode-MSIL.Backdoor.Crysan
Create hunting rule
Status:
Malicious
First seen:
2020-09-26 20:49:04 UTC
AV detection:
26 of 29 (89.66%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=3sxwqeehcbrkdjncsleoizthvc355eenfesrh3y4iq4sttuis7cq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
Similar samples:
0c34d4763fc968ccbe9f33dec2ae9e3e132a61b40ffc93cc22f337a0758c0279
AsyncRAT
222cdcb38abb9e24d7e198943ded854951b855b0aa02b396959cfe2a51a4a078
AsyncRAT
430bbefe89bad382de0a7831e7afc238f397a930a235d208585fb2bfb0b950bc
AsyncRAT
65c205b93cf9c6d9e9acd5336e010a43309688bfc2e28cffbb5ba8973757fd49
AsyncRAT
7caf87ac1666f10cbbff4cc01d51ec4df556908b2d8d55d5c4f0f3724dceded1
AsyncRAT
a4df5e9015f70b47dc4f2e6bae0fbeb9d108979e0cda7ef54aa123a0d33bdf8b
AsyncRAT
bcb474ac919440674135c673d8c6a0fc8015a63a15b2849c3346f74a716b5249
AsyncRAT
c8cc7c1a1210a082960b929c3598521979e16c1c6f5626b8ad29b9618ab5e18c
AsyncRAT
d82330b1d9bfbebbff4d21e9ddd0f86e90ed27031ba29557587d182246301ee5
AsyncRAT
f0006754d451556014c91039915ea9505f348f80538e536d30b75c5ef252d73d
AsyncRAT
+ 309 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
rat family:asyncrat
Link:
https://tria.ge/reports/200926-m953dt6sd6/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Executes dropped EXE
Async RAT payload
AsyncRat
Unpacked files
SH256 hash:
dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5
MD5 hash:
68d23586eef34a76a3e58cfc1bfdcb80
SHA1 hash:
7218ab8b9e02553b466361c043caa09a350e42b2
Link:
https://www.unpac.me/results/a3cc6c77-d673-4018-864f-e14cc7b30eb0/
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: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.

Web download

AsyncRAT

Executable exe dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5

(this sample)

  
Link
https://www.virustotal.com/gui/file/dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/66164/

Comments