MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f. 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: 15


Intelligence 15 IOCs YARA 24 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f
SHA3-384 hash: e13cc73e3626e45a3825ba2fb55eee790cc5ced9f2b68db38315ee73623c380b7e9a100899145805949fbb6631f3c1eb
SHA1 hash: 2871693c0d764e2ec90d9677ea79045e40bbc34f
MD5 hash: 84dd33ccd82243d952a680619656f161
humanhash: black-uranus-blossom-mexico
File name:Odeme_Belgesi.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:759'669 bytes
First seen:2023-09-29 11:26:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 00be6e6c4f9e287672c8301b72bdabf3 (116 x RedLineStealer, 70 x AsyncRAT, 55 x AgentTesla)
ssdeep 12288:PcrNS33L10QdrXPLWwrwnTAX6pDzy+UtOgK68cBXNKwG6yCc057:WNA3R5drXPbrwTAuDu+AO/67HXc057
Threatray 3'100 similar samples on MalwareBazaar
TLSH T10CF46881A6D54361D16E093225AD7AF055EDFD2C1A20CEDF66F4EB18C93334FD223A62
TrID 89.0% (.EXE) WinRAR Self Extracting archive (4.x-5.x) (265042/9/39)
3.5% (.EXE) Win64 Executable (generic) (10523/12/4)
2.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
1.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
1.5% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 70d4aacccc8ac460 (8 x AsyncRAT, 2 x QuasarRAT, 1 x njrat)
Reporter abuse_ch
Tags:AsyncRAT exe geo RAT TUR

Intelligence

File Origin
# of uploads :
1
# of downloads :
300
Origin country :
NL NL
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/451923/
Detection(s):
SecuriteInfo.com.Troj.NanoCo_TZ.22029.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Searching for synchronization primitives
Creating a file in the %temp% directory
Running batch commands
Creating a process from a recently created file
Creating a file
Using the Windows Management Instrumentation requests
Creating a process with a hidden window
Creating a file in the %AppData% directory
Launching a process
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Enabling autorun by creating a file
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
greyware lolbin overlay packed replace setupapi shdocvw shell32
Link:
https://www.filescan.io/uploads/6516b48a43cd377b1ea158fb/reports/5d4b457c-3742-4b25-b80f-687149751b89/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/a98e9e9a-3145-4444-aa3f-0cf4596e3e89
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
84 / 100
Link:
https://www.joesandbox.com/analysis/1316445
Signature
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1316445 Sample: Odeme_Belgesi.exe Startdate: 29/09/2023 Architecture: WINDOWS Score: 84 34 Malicious sample detected (through community Yara rule) 2->34 36 Multi AV Scanner detection for submitted file 2->36 38 Yara detected AsyncRAT 2->38 40 Yara detected Generic Downloader 2->40 10 Odeme_Belgesi.exe 9 2->10         started        process3 file4 28 C:\Users\user\AppData\...\wfbvsdkjf.sfx.exe, PE32 10->28 dropped 13 cmd.exe 1 10->13         started        process5 process6 15 wfbvsdkjf.sfx.exe 8 13->15         started        19 conhost.exe 13->19         started        file7 30 C:\Users\user\AppData\Local\...\wfbvsdkjf.exe, PE32 15->30 dropped 32 Multi AV Scanner detection for dropped file 15->32 21 wfbvsdkjf.exe 1 15->21         started        signatures8 process9 signatures10 42 Multi AV Scanner detection for dropped file 21->42 44 Machine Learning detection for dropped file 21->44 46 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 21->46 24 wfbvsdkjf.exe 21->24         started        process11 process12 26 WerFault.exe 24->26         started       
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f/
Threat name:
ByteCode-MSIL.Trojan.Nekark
Create hunting rule
Status:
Malicious
First seen:
2023-09-27 13:55:43 UTC
File Type:
PE (Exe)
Extracted files:
33
AV detection:
18 of 38 (47.37%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vd2eeclniq4rdpnhevstbw6xr2ehq4zwlngwnutqsoe4v7m4azhq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
agenttesla
Create hunting rule
Similar samples:
1299373ec40fc1f3f16957338574a9ad51a94e62220cc8c08f1ad81dee443544
AsyncRAT
16fc0cec13d88da3d0a36e4c42e733db8f1e21cafc18fd813a25cd0bc835f35a
AsyncRAT
2e75072eae7fa044b3ee05b2ba378823bbfa3091ceb5612f33b637c0d0764a21
AsyncRAT
438e8f8d626ca18bb5fbd3499cad058033b199c865badba6415e362d5b8dcd49
AsyncRAT
535884651e8ced605074dff4220651f4ceb02ea86025ff2721c816de2a94fd6a
AsyncRAT
6527e25f86c1902c430fc0e52769359f831365969c35fc12ef837b7b63fcc939
AsyncRAT
c48d2cb5d98dc746bc2dea4c2c4cf72ef1fdb18011e2bc46b3fcdb6072f2b896
AsyncRAT
f0e61a30a68cacde89ef636511dfae2b488bcbe9b47053c3afc0718d66324f70
AsyncRAT
f85fb30beeceb9e2721aa12deee155bb604c0a364f926da18644af7e6e5c7a25
AsyncRAT
+ 3'090 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:default5 rat
Link:
https://tria.ge/reports/230929-nkjhlaaa7x/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Async RAT payload
AsyncRat
Malware Config
C2 Extraction:
floptuytonroyem.sytes.net:7707
floptuytonroyem.sytes.net:8808
mloptuytonroyem.sytes.net:7707
mloptuytonroyem.sytes.net:8808
Unpacked files
SH256 hash:
02b6c007888b78953caefd64cddca03883a2e836908d1fb81c3a5c1b65ff1d7d
MD5 hash:
9ba0fc13b3d024f2be783e7e2bbd02f0
SHA1 hash:
eb476df0aae00569f82763126eaa90974619bce9
Link:
https://www.unpac.me/results/757628e0-9830-477f-a7e2-5f732af7c850/
SH256 hash:
25047eef78af176144e59d95a3ee220f33ec0fba26f7ae53689ad430a7e16b0e
MD5 hash:
e02be2e4592481b12f2ccaabfca2bb14
SHA1 hash:
b4fbe98e1d30ebadac14c66b4da99d54e2f29426
Link:
https://www.unpac.me/results/757628e0-9830-477f-a7e2-5f732af7c850/
SH256 hash:
26c65c98ace40e01b9fd39cb8a3ba7e5e51e02e2703c0e9e303a8e4a1bf613c7
MD5 hash:
2cadf20cf065235d3bfbd189a97c5c21
SHA1 hash:
45e7d4e58156802ffbe0af3b9e0abc8dbd8fa0fe
Detections:
AsyncRAT
Create hunting rule
win_asyncrat_w0
Create hunting rule
Link:
https://www.unpac.me/results/757628e0-9830-477f-a7e2-5f732af7c850/
Parent samples :
7185d3a43d3c8bdf79f5e2bef494edbe450244e1af247af36cf1d8992fdbb6c2
a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f
4a72f887ce916e9eaef552c54fdcdc51dd610b3b5c92528956341281bdcbed82
SH256 hash:
a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f
MD5 hash:
84dd33ccd82243d952a680619656f161
SHA1 hash:
2871693c0d764e2ec90d9677ea79045e40bbc34f
Link:
https://www.unpac.me/results/757628e0-9830-477f-a7e2-5f732af7c850/
Malware family:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a8f442096d44/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/a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f

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__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
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:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SelfExtractingRAR
Create hunting rule
Author:Xavier Mertens
Description:Detects an SFX archive with automatic script execution
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
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_Trojan_Asyncrat_11a11ba1
Create hunting rule
Author:Elastic Security
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.

Malspam

AsyncRAT

Executable exe a8f442096d443911bda7256530dbd78e887873365b4d66d2709389cafd9c064f

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/451923/

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