Malware Analysis Report

2025-01-02 12:10

Sample ID 240419-lmax5adh82
Target 712940BAEF78C821E36B8701BF073C52.exe
SHA256 08f8498aec75418bb4c12972a6547ee2c4762160e7bf36c558a91b7b9110ed3f
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

08f8498aec75418bb4c12972a6547ee2c4762160e7bf36c558a91b7b9110ed3f

Threat Level: Known bad

The file 712940BAEF78C821E36B8701BF073C52.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Downloads MZ/PE file

Suspicious use of SetThreadContext

Executes dropped EXE

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-19 09:38

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-19 09:38

Reported

2024-04-19 09:41

Platform

win7-20240221-en

Max time kernel

144s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe"

Signatures

AsyncRat

rat asyncrat

Downloads MZ/PE file

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2072 set thread context of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\SCHtAsKs.EXe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2072 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 2072 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 2072 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 2072 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2072 wrote to memory of 2460 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1472 wrote to memory of 1764 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1764 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1764 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1764 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1560 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1560 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1560 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1560 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1520 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1520 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1520 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
PID 1472 wrote to memory of 1520 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

Processes

C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe

"C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe"

C:\Windows\SysWOW64\SCHtAsKs.EXe

"SCHtAsKs.EXe" /create /tn WindowsUpdates310628529 /tr "C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE" /st 09:39 /du 9999:59 /sc daily /ri 1 /f /RL HIGHEST

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {52E49321-1CE7-40CF-8978-9B0D60691600} S-1-5-21-330940541-141609230-1670313778-1000:KXIPPCKF\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

Network

Country Destination Domain Proto
US 204.12.199.30:20991 204.12.199.30 tcp
US 204.12.199.30:20991 204.12.199.30 tcp
US 204.12.199.30:7707 tcp

Files

memory/2072-0-0x00000000012C0000-0x00000000012DA000-memory.dmp

memory/2072-1-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/2072-2-0x0000000004D00000-0x0000000004D40000-memory.dmp

memory/2072-4-0x00000000007A0000-0x00000000007AA000-memory.dmp

memory/2460-11-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2460-9-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2460-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2460-7-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2460-5-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2072-17-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/2460-15-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2460-18-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2460-20-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2460-21-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/2460-22-0x00000000022F0000-0x0000000002330000-memory.dmp

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

MD5 712940baef78c821e36b8701bf073c52
SHA1 d59896b87424fafc0d00ab5e5c2019bd941167ce
SHA256 08f8498aec75418bb4c12972a6547ee2c4762160e7bf36c558a91b7b9110ed3f
SHA512 68bc6df413e00e6420ee6db6e4d0497bab61908b96f48fdb6bf6aae9bed72de840d83dfc0017dd24995a05f29b415b82852f84e9b74de85d303b67cc396c7007

memory/1764-42-0x0000000000270000-0x000000000028A000-memory.dmp

memory/1764-43-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/2460-44-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/2460-45-0x00000000022F0000-0x0000000002330000-memory.dmp

memory/1560-48-0x0000000001200000-0x000000000121A000-memory.dmp

memory/1560-49-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/1560-50-0x0000000074700000-0x0000000074DEE000-memory.dmp

memory/1520-52-0x0000000000060000-0x000000000007A000-memory.dmp

memory/1520-53-0x0000000074700000-0x0000000074DEE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-19 09:38

Reported

2024-04-19 09:41

Platform

win10v2004-20240412-en

Max time kernel

147s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe"

Signatures

AsyncRat

rat asyncrat

Downloads MZ/PE file

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3916 set thread context of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\SCHtAsKs.EXe N/A
N/A N/A C:\Windows\SysWOW64\SCHtAsKs.EXe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 112 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 112 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 112 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 112 wrote to memory of 2152 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 112 wrote to memory of 2152 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 112 wrote to memory of 2152 N/A C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 3916 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 3916 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\SysWOW64\SCHtAsKs.EXe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Processes

C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe

"C:\Users\Admin\AppData\Local\Temp\712940BAEF78C821E36B8701BF073C52.exe"

C:\Windows\SysWOW64\SCHtAsKs.EXe

"SCHtAsKs.EXe" /create /tn WindowsUpdates62766459 /tr "C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE" /st 09:39 /du 9999:59 /sc daily /ri 1 /f /RL HIGHEST

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Windows\SysWOW64\SCHtAsKs.EXe

"SCHtAsKs.EXe" /create /tn WindowsUpdates62766459 /tr "C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE" /st 09:40 /du 9999:59 /sc daily /ri 1 /f /RL HIGHEST

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 131.253.33.237:443 g.bing.com tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 237.33.253.131.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 204.12.199.30:20991 204.12.199.30 tcp
US 204.12.199.30:20991 204.12.199.30 tcp
US 8.8.8.8:53 30.199.12.204.in-addr.arpa udp
US 204.12.199.30:20991 204.12.199.30 tcp
US 204.12.199.30:20991 204.12.199.30 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 204.12.199.30:7707 tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 122.10.44.20.in-addr.arpa udp

Files

memory/112-0-0x0000000000F70000-0x0000000000F8A000-memory.dmp

memory/112-1-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/112-2-0x0000000005D30000-0x00000000062D4000-memory.dmp

memory/112-3-0x00000000059C0000-0x00000000059D0000-memory.dmp

memory/112-5-0x00000000072B0000-0x00000000072BA000-memory.dmp

memory/112-6-0x0000000007360000-0x00000000073FC000-memory.dmp

memory/112-8-0x0000000074690000-0x0000000074E40000-memory.dmp

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE

MD5 712940baef78c821e36b8701bf073c52
SHA1 d59896b87424fafc0d00ab5e5c2019bd941167ce
SHA256 08f8498aec75418bb4c12972a6547ee2c4762160e7bf36c558a91b7b9110ed3f
SHA512 68bc6df413e00e6420ee6db6e4d0497bab61908b96f48fdb6bf6aae9bed72de840d83dfc0017dd24995a05f29b415b82852f84e9b74de85d303b67cc396c7007

memory/3916-11-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/3916-12-0x0000000004B80000-0x0000000004B90000-memory.dmp

memory/2748-13-0x0000000000400000-0x0000000000412000-memory.dmp

memory/3916-15-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/2748-16-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/2748-17-0x0000000005830000-0x0000000005896000-memory.dmp

memory/2748-18-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/2748-19-0x00000000053A0000-0x00000000053B0000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Accounts_Ledger_Software.eXE.log

MD5 290b783420a3638b2f341f46e6fb563d
SHA1 1d74ecf967490c0b579086ff4f65b6bf1360adc6
SHA256 15835a01fa04e5654c6d8ea22ec8ce3b36b8ad114a2851b322724847e04cb9e6
SHA512 3aab90dead03cb1cae9b12b0bdcb4d86b29923d34133dba655ac6fd8e9783a3baa3edc7af2fc75930d86a884b940e8163babacd0cadf04a8418732be87ffba84

memory/4576-22-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/4576-23-0x0000000004EC0000-0x0000000004F52000-memory.dmp

memory/4576-24-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/4332-26-0x0000000074690000-0x0000000074E40000-memory.dmp

memory/4332-27-0x0000000074690000-0x0000000074E40000-memory.dmp