asyncrat | 8de2fd12c142b386f6465f4fe39ab08bed03823e0a01fd0ea2794b2c21710e62

Analysis

max time kernel
141s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06/06/2024, 00:29

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General

Target
8de2fd12c142b386f6465f4fe39ab08bed03823e0a01fd0ea2794b2c21710e62.dll
Size 2.9MB
Sample240606-as87bsdf47
SHA256 8de2fd12c142b386f6465f4fe39ab08bed03823e0a01fd0ea2794b2c21710e62
MD5 4f146e4dcb5e5e4d7047a09cc9285cf9
SHA1 b8d21a5dfb186c78247ba8e9e4ef9577153692cb
SHA512 49f8c4a30fb0d178a25a9f11afcaa476468d719e27f44831d3dd83bb851f141b00eabd443e9ecd5e50d41b4ab3b0e142b0e89ed89e72d175c9ca599398ec2539
SSDEEP 49152:bYkK4XOUUaoLXiLw53y+etAYDIR4xTbRsPRanBFYCa6pgXlJM8Cw07gRxBmlIt43:wi/omLw53y+O8obRsPdCa6pAON3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.2

Botnet

Default

80.76.49.148:4545

Mutex

jiytpolsfawmdcmo

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*ToPuta = "rundll32.exe C:\\Users\\Admin\\Documents\\ChromeData.dll,EntryPoint"	reg.exe

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File opened for modification	\??\c:\program files\desktop.ini	csc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 968 set thread context of 4740	968	regsvr32.exe	84

Drops file in Program Files directory 47 IoCs

description	ioc	Process
File opened for modification	\??\c:\program files\mergeunlock.hta	csc.exe
File opened for modification	\??\c:\program files\pingimport.kix	csc.exe
File opened for modification	\??\c:\program files\unblockdismount.css	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\nacl_irt_x86_64.nexe	csc.exe
File opened for modification	\??\c:\program files\mergeregister.avi	csc.exe
File opened for modification	\??\c:\program files\openpop.mpeg	csc.exe
File opened for modification	\??\c:\program files\unprotectgrant.3gpp	csc.exe
File opened for modification	\??\c:\program files\backuprestore.xlsm	csc.exe
File opened for modification	\??\c:\program files\compressconnect.xht	csc.exe
File opened for modification	\??\c:\program files\exportconvertto.m3u	csc.exe
File opened for modification	\??\c:\program files\getping.dwfx	csc.exe
File opened for modification	\??\c:\program files\grantundo.cab	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\master_preferences	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\vk_swiftshader_icd.json	csc.exe
File opened for modification	\??\c:\program files\importexpand.vssx	csc.exe
File opened for modification	\??\c:\program files\installselect.vsw	csc.exe
File opened for modification	\??\c:\program files\requeststep.tmp	csc.exe
File opened for modification	\??\c:\program files\updateinvoke.tif	csc.exe
File opened for modification	\??\c:\program files\pushconvert.vbe	csc.exe
File opened for modification	\??\c:\program files\stopstart.jfif	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\chrome.dll.sig	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\chrome_100_percent.pak	csc.exe
File opened for modification	\??\c:\program files\checkpointswitch.wmv	csc.exe
File opened for modification	\??\c:\program files\compresscopy.jpe	csc.exe
File opened for modification	\??\c:\program files\grantblock.tif	csc.exe
File opened for modification	\??\c:\program files\restoreclear.wmf	csc.exe
File opened for modification	\??\c:\program files\showoptimize.tif	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\icudtl.dat	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\v8_context_snapshot.bin	csc.exe
File opened for modification	\??\c:\program files\unprotectuninstall.clr	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\chrome.visualelementsmanifest.xml	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\resources.pak	csc.exe
File opened for modification	\??\c:\program files\groupexpand.html	csc.exe
File opened for modification	\??\c:\program files\installrestart.cab	csc.exe
File opened for modification	\??\c:\program files\requestsync.wpl	csc.exe
File opened for modification	\??\c:\program files\restoreset.aiff	csc.exe
File opened for modification	\??\c:\program files\saveresume.ex_	csc.exe
File opened for modification	\??\c:\program files\desktop.ini	csc.exe
File opened for modification	\??\c:\program files\removeunregister.jpe	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\110.0.5481.104.manifest	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\chrome.exe.sig	csc.exe
File opened for modification	\??\c:\program files\google\chrome\application\110.0.5481.104\chrome_200_percent.pak	csc.exe
File opened for modification	\??\c:\program files\approvedisable.vst	csc.exe
File opened for modification	\??\c:\program files\backupundo.xlsm	csc.exe
File opened for modification	\??\c:\program files\checkpointtest.jpe	csc.exe
File opened for modification	\??\c:\program files\dismountrestore.m4v	csc.exe
File opened for modification	\??\c:\program files\unlockjoin.iso	csc.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4740	csc.exe
4740	csc.exe
4740	csc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	csc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4740	csc.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 216 wrote to memory of 968	216	regsvr32.exe	83
PID 216 wrote to memory of 968	216	regsvr32.exe	83
PID 216 wrote to memory of 968	216	regsvr32.exe	83
PID 968 wrote to memory of 4740	968	regsvr32.exe	84
PID 968 wrote to memory of 4740	968	regsvr32.exe	84
PID 968 wrote to memory of 4740	968	regsvr32.exe	84
PID 968 wrote to memory of 4740	968	regsvr32.exe	84
PID 968 wrote to memory of 4740	968	regsvr32.exe	84
PID 968 wrote to memory of 2044	968	regsvr32.exe	88
PID 968 wrote to memory of 2044	968	regsvr32.exe	88
PID 968 wrote to memory of 2044	968	regsvr32.exe	88
PID 2044 wrote to memory of 1140	2044	cmd.exe	90
PID 2044 wrote to memory of 1140	2044	cmd.exe	90
PID 2044 wrote to memory of 1140	2044	cmd.exe	90

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\8de2fd12c142b386f6465f4fe39ab08bed03823e0a01fd0ea2794b2c21710e62.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:216
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\8de2fd12c142b386f6465f4fe39ab08bed03823e0a01fd0ea2794b2c21710e62.dll
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
    3⤵
    - Drops desktop.ini file(s)
    - Drops file in Program Files directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4740
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ToPuta" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\ChromeData.dll",EntryPoint /f & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2044
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ToPuta" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\ChromeData.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      PID:1140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/968-1-0x0000000010004000-0x000000001001E000-memory.dmp

Download

memory/968-2-0x0000000010000000-0x00000000102E8000-memory.dmp

Download

memory/968-0-0x0000000010000000-0x00000000102E8000-memory.dmp

Download

memory/968-5-0x0000000010000000-0x00000000102E8000-memory.dmp

Download

memory/4740-16-0x0000000006650000-0x00000000066B6000-memory.dmp

Download

memory/4740-20-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-8-0x0000000073C4E000-0x0000000073C4F000-memory.dmp

Download

memory/4740-9-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-10-0x0000000005EB0000-0x0000000005F42000-memory.dmp

Download

memory/4740-11-0x0000000005850000-0x000000000585A000-memory.dmp

Download

memory/4740-12-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-15-0x0000000006A10000-0x0000000006AAC000-memory.dmp

Download

memory/4740-3-0x0000000000580000-0x0000000000598000-memory.dmp

Download

memory/4740-17-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-19-0x0000000073C4E000-0x0000000073C4F000-memory.dmp

Download

memory/4740-6-0x0000000005860000-0x0000000005E04000-memory.dmp

Download

memory/4740-21-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-22-0x0000000007A60000-0x0000000007AD6000-memory.dmp

Download

memory/4740-23-0x00000000079E0000-0x00000000079F0000-memory.dmp

Download

memory/4740-24-0x0000000007A40000-0x0000000007A5E000-memory.dmp

Download

memory/4740-25-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-26-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-27-0x0000000073C40000-0x00000000743F0000-memory.dmp

Download

memory/4740-28-0x0000000007D40000-0x0000000007D4E000-memory.dmp

Download

memory/4740-29-0x00000000029A0000-0x00000000029AC000-memory.dmp

Download