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start.exe

AsyncRAT .NET framework(MSIL) Malicious Library Malicious Packer Downloader task schedule UPX HTTP DNS ScreenShot Create Service KeyLogger Internet API P2P DGA Http API FTP Socket Escalate priviledges Code injection PWS Sniff Audio Steal credential
  1. Resubmit sample
Category Machine Started Completed
FILE s1_win7_x6401 March 29, 2024, 9:31 a.m. March 29, 2024, 9:37 a.m.
Size 63.0KB
Type PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5 c1ade258f05c512e98ebc4d9d1165f8a
SHA256 447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759
CRC32 A7D7C05F
ssdeep 1536:SaKFoNbEkySYKumUYFOy5biAPY0JG4aRjnl7RUr+TG5x:SawoNbEkAKumUYFD5biF0JejxSsCx
Yara
  • AsyncRat - AsyncRat Payload
  • Malicious_Library_Zero - Malicious_Library
  • PE_Header_Zero - PE File Signature
  • Malicious_Packer_Zero - Malicious Packer
  • Is_DotNET_EXE - (no description)
  • IsPE32 - (no description)
  • Win32_Trojan_PWS_Net_1_Zero - Win32 Trojan PWS .NET Azorult
  • UPX_Zero - UPX packed file
  • OS_Processor_Check_Zero - OS Processor Check

Name Response Post-Analysis Lookup
leetboy.dynuddns.net
A 185.196.11.223
185.196.11.223
IP Address Status Action
164.124.101.2 Active Moloch
185.196.11.223 Active Moloch

Suricata Alerts

Flow SID Signature Category
TCP 185.196.11.223:1339 -> 192.168.56.101:49171 2400021 ET DROP Spamhaus DROP Listed Traffic Inbound group 22 Misc Attack
TCP 185.196.11.223:1339 -> 192.168.56.101:49171 2030673 ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server) Domain Observed Used for C2 Detected
TCP 185.196.11.223:1339 -> 192.168.56.101:49171 2035595 ET MALWARE Generic AsyncRAT Style SSL Cert Domain Observed Used for C2 Detected
UDP 192.168.56.101:59002 -> 164.124.101.2:53 2045995 ET INFO DYNAMIC_DNS Query to a *.dynuddns .net Domain Potentially Bad Traffic

Suricata TLS

Flow Issuer Subject Fingerprint
TLSv1
192.168.56.101:49171
185.196.11.223:1339 		CN=AsyncRAT Server CN=AsyncRAT Server c0:74:2f:cf:ac:08:26:95:4d:1f:b6:6f:1e:ab:22:b3:91:b1:75:90

Time & API Arguments Status Return Repeated

GetComputerNameW

 computer_name: TEST22-PC
1 1 0
Time & API Arguments Status Return Repeated

WriteConsoleW

 buffer: The batch file cannot be found.
console_handle: 0x0000000b
1 1 0

WriteConsoleW

 buffer: SUCCESS: The scheduled task "svchos" has successfully been created.
console_handle: 0x00000007
1 1 0
cmdline schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\test22\AppData\Roaming\svchos.exe"'
file C:\Users\test22\AppData\Roaming\svchos.exe
file C:\Users\test22\AppData\Roaming\svchos.exe
description Create a windows service rule Create_Service
description Communications over RAW Socket rule Network_TCP_Socket
description Communication using DGA rule Network_DGA
description Match Windows Http API call rule Str_Win32_Http_API
description Take ScreenShot rule ScreenShot
description Escalate priviledges rule Escalate_priviledges
description Steal credential rule local_credential_Steal
description task schedule rule schtasks_Zero
description PWS Memory rule Generic_PWS_Memory_Zero
description Record Audio rule Sniff_Audio
description Communications over HTTP rule Network_HTTP
description Communications use DNS rule Network_DNS
description Code injection with CreateRemoteThread in a remote process rule Code_injection
description (no description) rule DebuggerCheck__GlobalFlags
description (no description) rule DebuggerCheck__QueryInfo
description (no description) rule DebuggerCheck__RemoteAPI
description (no description) rule DebuggerHiding__Thread
description (no description) rule DebuggerHiding__Active
description (no description) rule DebuggerException__ConsoleCtrl
description (no description) rule DebuggerException__SetConsoleCtrl
description (no description) rule ThreadControl__Context
description (no description) rule SEH__vectored
description (no description) rule Check_Dlls
description Checks if being debugged rule anti_dbg
description Anti-Sandbox checks for ThreatExpert rule antisb_threatExpert
description Bypass DEP rule disable_dep
description Affect hook table rule win_hook
description File Downloader rule Network_Downloader
description Match Windows Inet API call rule Str_Win32_Internet_API
description Communications over FTP rule Network_FTP
description Run a KeyLogger rule KeyLogger
description Communications over P2P network rule Network_P2P_Win
cmdline schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\test22\AppData\Roaming\svchos.exe"'
cmdline schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\test22\AppData\Roaming\svchos.exe"'
Process injection Process 3048 resumed a thread in remote process 152
Time & API Arguments Status Return Repeated

NtResumeThread

 thread_handle: 0x00000088
suspend_count: 0
process_identifier: 152
1 0 0
Bkav W32.AIDetectMalware.CS
Lionic Trojan.Win32.AsyncRAT.m!c
Elastic Windows.Generic.Threat
CAT-QuickHeal Backdoor.MsilFC.S14901152
Skyhigh BehavesLike.Win32.Fareit.km
ALYac Generic.AsyncRAT.Marte.B.6A4546A1
Cylance unsafe
VIPRE Generic.AsyncRAT.Marte.B.6A4546A1
Sangfor Trojan.Win32.Save.a
BitDefender Generic.AsyncRAT.Marte.B.6A4546A1
Cybereason malicious.8f05c5
Arcabit Generic.AsyncRAT.Marte.B.6A4546A1
VirIT Trojan.Win32.MSIL_Heur.B
Symantec MSIL.Trojan!gen7
ESET-NOD32 a variant of MSIL/AsyncRAT.A
APEX Malicious
McAfee PWS-FCQR!C1ADE258F05C
Avast Win32:DropperX-gen [Drp]
ClamAV Win.Packed.Razy-9625918-0
Kaspersky HEUR:Backdoor.MSIL.Crysan.gen
Alibaba Backdoor:MSIL/AsyncRat.749dc0b2
MicroWorld-eScan Generic.AsyncRAT.Marte.B.6A4546A1
Rising Trojan.AntiVM!1.CF63 (CLASSIC)
Emsisoft Generic.AsyncRAT.Marte.B.6A4546A1 (B)
F-Secure Trojan.TR/Dropper.Gen
DrWeb BackDoor.AsyncRATNET.2
TrendMicro Backdoor.Win32.ASYNCRAT.YXEC2Z
FireEye Generic.mg.c1ade258f05c512e
Sophos Troj/AsyncRat-B
Ikarus Backdoor.AsyncRat
Jiangmin Backdoor.MSIL.gffx
Google Detected
Avira TR/Dropper.Gen
MAX malware (ai score=86)
Kingsoft malware.kb.c.1000
Gridinsoft Backdoor.Win32.Generic.sa
Microsoft Backdoor:MSIL/AsyncRat.AD!MTB
ZoneAlarm HEUR:Backdoor.MSIL.Crysan.gen
GData MSIL.Backdoor.DCRat.D
Varist W32/Samas.B.gen!Eldorado
AhnLab-V3 Malware/Win32.RL_Generic.C4267562
BitDefenderTheta Gen:NN.ZemsilF.36802.dm0@ayr3qSj
DeepInstinct MALICIOUS
VBA32 OScope.Backdoor.MSIL.Crysan
Malwarebytes Generic.Malware.AI.DDS
Panda Trj/GdSda.A
TrendMicro-HouseCall Backdoor.Win32.ASYNCRAT.YXEC2Z
Tencent Msil.Backdoor.Crysan.Ymhl
SentinelOne Static AI - Malicious PE
Fortinet MSIL/Agent.CFQ!tr