MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e. 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: 18

Intelligence 18 IOCs YARA 21 File information Comments 1

SHA256 hash:	c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e
SHA3-384 hash:	55429eb5fd5bb67b046beffdb9f9a3d2fd6d684f08fcd096c2a6167c5d384b878b492c6f03b626c3c346219874fcd5bc
SHA1 hash:	abdc0ee76d9f21d318c04b12cbbb4453c18a4c57
MD5 hash:	310b982faa6a9c8473c6a6097a64317f
humanhash:	victor-sink-blossom-fish
File name:	310b982faa6a9c8473c6a6097a64317f
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	46'592 bytes
First seen:	2024-03-19 08:37:34 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	768:huyRNTAoZjRWUJs9bmo2qLxAuXuPeD58vnPIM9zjbggX36PV/n8vvmv4Rk4oTeBf:huyRNTAGo2Ju7D5iAM93bHXK9/n8mQRL
Threatray	2'933 similar samples on MalwareBazaar
TLSH	T15F232B003BE8812BF2BE4F7899F261458A7AF2633603D54E2CC451D75613FC69A526FE
TrID	60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.8% (.SCR) Windows screen saver (13097/50/3) 8.7% (.EXE) Win64 Executable (generic) (10523/12/4) 5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter	zbetcheckin
Tags:	32 AsyncRAT exe

Intelligence

File Origin

# of uploads :

# of downloads :

356

Origin country :

Vendor Threat Intelligence

Malware family:

asyncrat

ID:

File name:

c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e.exe

Verdict:

Malicious activity

Analysis date:

2024-03-19 09:11:27 UTC

Tags:

rat asyncrat remote

Link:

https://app.any.run/tasks/93bc73e7-9b97-4e33-83ff-f2e6047f2451

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

Porcupine.Malware.58887.UNOFFICIAL

Win.Packed.Razy-9625918-0

Win.Packed.AsyncRAT-9856570-1

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Connection attempt

Sending a custom TCP request

Using the Windows Management Instrumentation requests

Launching a process

Moving a file to the Program Files subdirectory

Replacing files

Sending an HTTP GET request

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm asyncrat config-extracted lolbin njrat reg schtasks

Link:

https://www.filescan.io/uploads/65f94ef087137159d449cd2c/reports/ddd08eb4-e8a3-408c-bae5-f9e0f17e4eee/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e

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.

Malware family:

AsyncRAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/d0d56865-e5ee-404d-8767-a9ad1dafa63f

Result

Threat name:

AsyncRAT

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1411573

Signature

Antivirus / Scanner detection for submitted sample

Found malware configuration

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Snort IDS alert for network traffic

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Yara detected AsyncRAT

Yara detected Generic Downloader

Behaviour

Behavior Graph:

Download SVG

Score:

98%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e

Detection:

asyncrat

Link:

https://mwdb.cert.pl/sample/c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e/

Threat name:

ByteCode-MSIL.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2024-03-18 14:16:29 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

32 of 38 (84.21%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=yior3vrzdluthgcqpskptmdv3pulvtxnjeb2pcz7npv7vboncvpa._file

Verdict:

malicious

Label(s):

asyncrat

AsyncRAT

13f53967b03017371c9385a4266b5f3169afe48e933a5cbbf95f24843c05f376

AsyncRAT

34619b02688a538cf3bec776233ced7001f09307e4a4d231fc0f14330ec938b6

AsyncRAT

3ae8d263abd33819980c81f1e0b6b876f06e5747807459e82a47fd518767358e

AsyncRAT

4a72f887ce916e9eaef552c54fdcdc51dd610b3b5c92528956341281bdcbed82

AsyncRAT

8545fedaeb113fdb4000b3f6a8d0f0f4694f9198203086a7d1230385a5180f78

AsyncRAT

85b4167417d416880d3e9f1ff438e1e5b125ceb28de4e3ebd9b5725717815157

AsyncRAT

8737b9c5969931c61500427c301c40e635acec433bd4450e1dca9f202e97fb6f

AsyncRAT

+ 2'923 additional samples on MalwareBazaar

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat botnet:kz1 rat

Link:

https://tria.ge/reports/240319-kjqzhafh8s/

Behaviour

Suspicious use of AdjustPrivilegeToken

AsyncRat

Malware Config

C2 Extraction:

77.232.132.25:5001

Unpacked files

SH256 hash:

c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e

MD5 hash:

310b982faa6a9c8473c6a6097a64317f

SHA1 hash:

abdc0ee76d9f21d318c04b12cbbb4453c18a4c57

Detections:

AsyncRAT

win_asyncrat_w0

INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse

asyncrat

Link:

https://www.unpac.me/results/19b1be7e-4c19-4436-b72a-47463b008304/

Malware family:

AsyncRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/c21d1dd6391a/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e

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:	kevoreilly, JPCERT/CC Incident Response Group
Description:	AsyncRat Payload

Rule name:	DebuggerCheck__RemoteAPI Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse Create hunting rule
Author:	ditekSHen
Description:	Detects file containing reversed ASEP Autorun registry keys

Rule name:	malware_asyncrat Create hunting rule
Description:	detect AsyncRat in memory
Reference:	https://github.com/NYAN-x-CAT/AsyncRAT-C-Sharp

Rule name:	malware_asyncrat Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect AsyncRat in memory
Reference:	internal research

Rule name:	MAL_AsnycRAT Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects AsnycRAT based on it's config decryption routine

Rule name:	MAL_AsyncRAT_Config_Decryption Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects AsnycRAT based on it's config decryption routine

Rule name:	msil_suspicious_use_of_strreverse Create hunting rule
Author:	dr4k0nia
Description:	Detects mixed use of Microsoft.CSharp and VisualBasic to use StrReverse

Rule name:	Multifamily_RAT_Detection Create hunting rule
Author:	Lucas Acha (http://www.lukeacha.com)
Description:	Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

Rule name:	Njrat Create hunting rule
Author:	botherder https://github.com/botherder
Description:	Njrat

Rule name:	pe_imphash Create hunting rule

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	SUSP_DOTNET_PE_List_AV Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detecs .NET Binary that lists installed AVs

Rule name:	SUSP_Reverse_Run_Key Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects a Reversed Run Key

Rule name:	Windows_Generic_Threat_ce98c4bc Create hunting rule
Author:	Elastic Security

Rule name:	win_asyncrat_bytecodes Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects bytecodes present in unobfuscated AsyncRat Samples. Rule may also pick up on other Asyncrat-derived malware (Dcrat/venom etc)

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

Rule name:	win_asyncrat_unobfuscated Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects strings present in unobfuscated AsyncRat Samples. Rule may also pick up on other Asyncrat-derived malware (Dcrat/venom etc)

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.

Web download

AsyncRAT

exe c21d1dd6391ae93398507c94f9b075dbe8baceed4903a78b3f6bebfa85cd155e

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2786777/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

Comments

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zbet commented on 2024-03-19 08:37:35 UTC

url : hxxp://a0920080.xsph.ru/KZ1/asyns.exe