Malware Analysis Report

2025-08-06 03:44

Sample ID 230501-fwwcjaee43
Target t.png
SHA256 6e39cc4bf7d911b9b6b47d0ca860df4b405386a8232943cd9e4a7f03d2027c0c
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

6e39cc4bf7d911b9b6b47d0ca860df4b405386a8232943cd9e4a7f03d2027c0c

Threat Level: Known bad

The file t.png was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Async RAT payload

Checks computer location settings

Suspicious use of SetThreadContext

Drops file in System32 directory

Enumerates physical storage devices

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Uses Task Scheduler COM API

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-05-01 05:13

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-05-01 05:13

Reported

2023-05-01 05:16

Platform

win7-20230220-en

Max time kernel

146s

Max time network

34s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\t.ps1

Signatures

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1708 wrote to memory of 572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe
PID 1708 wrote to memory of 572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe
PID 1708 wrote to memory of 572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe
PID 828 wrote to memory of 904 N/A C:\Windows\system32\taskeng.exe C:\Windows\System32\WScript.exe
PID 828 wrote to memory of 904 N/A C:\Windows\system32\taskeng.exe C:\Windows\System32\WScript.exe
PID 828 wrote to memory of 904 N/A C:\Windows\system32\taskeng.exe C:\Windows\System32\WScript.exe
PID 904 wrote to memory of 1196 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\cmd.exe
PID 904 wrote to memory of 1196 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\cmd.exe
PID 904 wrote to memory of 1196 N/A C:\Windows\System32\WScript.exe C:\Windows\System32\cmd.exe
PID 1196 wrote to memory of 1552 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1196 wrote to memory of 1552 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1196 wrote to memory of 1552 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1552 wrote to memory of 776 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1552 wrote to memory of 776 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1552 wrote to memory of 776 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\t.ps1

C:\Windows\system32\schtasks.exe

"C:\Windows\system32\schtasks.exe" /create /sc minute /mo 2 /tn PDF /tr C:\ProgramData\PDF\PDF.vbs

C:\Windows\system32\taskeng.exe

taskeng.exe {CA6A2BE8-471D-47F3-ACE8-49792FA15D64} S-1-5-21-3499517378-2376672570-1134980332-1000:MLXLFKOI\Admin:Interactive:[1]

C:\Windows\System32\WScript.exe

C:\Windows\System32\WScript.exe "C:\ProgramData\PDF\PDF.vbs"

C:\Windows\System32\cmd.exe

cmd /c ""C:\ProgramData\PDF\1.bat" "

C:\Windows\system32\cmd.exe

CMD /C powershell -NOP -WIND HIDDEN -eXEC BYPASS -NONI "C:\ProgramData\PDF\PDF.ps1"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -NOP -WIND HIDDEN -eXEC BYPASS -NONI "C:\ProgramData\PDF\PDF.ps1"

Network

N/A

Files

memory/1708-58-0x000000001B280000-0x000000001B562000-memory.dmp

memory/1708-59-0x0000000002380000-0x0000000002400000-memory.dmp

memory/1708-60-0x0000000002380000-0x0000000002400000-memory.dmp

memory/1708-62-0x0000000002220000-0x0000000002228000-memory.dmp

memory/1708-61-0x0000000002380000-0x0000000002400000-memory.dmp

memory/1708-63-0x0000000002380000-0x0000000002400000-memory.dmp

C:\ProgramData\PDF\PDF.vbs

MD5 30e4773314799aa0e1fd7761cae6e609
SHA1 d1b5a371a7555e99a7602ae6ee8028ac0f0462c4
SHA256 dc592583d072f325b7a0a54d53499f32ef95c731344cc10400f0bb03e7db4720
SHA512 fcbeca634cb6fe2d0ea4f726f09b4a35917615467a562e9d73cd235cd337bb797fb6a996f0569e83f4f858c0226b84fbd2d0721bea47d1039e5ffe6ebca0bb8d

C:\ProgramData\PDF\1.bat

MD5 a7f20549327da521bf176b6faa76e623
SHA1 b9b22202b9d3d43ffa6cbf2f3f81dc7f5b06c605
SHA256 a2099940d9f7f9a0a603a5a36ef2b24eef49f2cb428539949a6d75261faaba46
SHA512 5cac6f996aa1bb4dd11a39d3001da243c6f020bc1a3d86a36ec773d45e479514b006e3b3d8782b1eaab628d0fefdb987495308b9c88f38667f875179771f4823

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 24d23a69357cf6c2573bb1fe89afe3d6
SHA1 87309ae898729f63412a314c821957cd18448e19
SHA256 6e3563cdecd14b5155fbde95b78d1843111b7d7707f6dbf14183ce07f81c7b21
SHA512 e8681b9ad7ac865a5dbcaa354ba4d803b73a712910c67b8ee46a8bc5d1eab651cfcb68dd5cdb3fc5cf7e5bd88ad448589d1e94b32eab350baadd6d79e4c7c7d7

memory/776-76-0x000000001B120000-0x000000001B402000-memory.dmp

memory/776-77-0x0000000001F40000-0x0000000001F48000-memory.dmp

memory/776-78-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/776-79-0x00000000029D0000-0x0000000002A50000-memory.dmp

memory/776-80-0x00000000029D0000-0x0000000002A50000-memory.dmp

C:\ProgramData\PDF\PDF.ps1

MD5 ee39cd0d14321044da4e3e548392983c
SHA1 4f04ebde6c0d04a5837bc81d062d7b14f7738168
SHA256 86f1d81d4d4f866442b384394e35d1a8058bbe843cc0d8896b1655d3ab3cf886
SHA512 bd2817d4ef8367a0c2f7dfc838aef559c16a703d95f887b053da3bde95f4ab709cbbfde2b22c829d9dccb52abb8a708868a0f327031eeae9584764d3fc3a7ad4

memory/776-82-0x00000000029D0000-0x0000000002A50000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-05-01 05:13

Reported

2023-05-01 05:16

Platform

win10v2004-20230220-en

Max time kernel

149s

Max time network

151s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\t.ps1

Signatures

AsyncRat

rat asyncrat

Async RAT payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation C:\Windows\System32\WScript.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 5000 set thread context of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4680 wrote to memory of 1160 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe
PID 4680 wrote to memory of 1160 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe
PID 4588 wrote to memory of 1276 N/A C:\Windows\System32\WScript.exe C:\Windows\system32\cmd.exe
PID 4588 wrote to memory of 1276 N/A C:\Windows\System32\WScript.exe C:\Windows\system32\cmd.exe
PID 1276 wrote to memory of 3596 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 1276 wrote to memory of 3596 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 3596 wrote to memory of 5000 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3596 wrote to memory of 5000 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5000 wrote to memory of 3148 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\t.ps1

C:\Windows\system32\schtasks.exe

"C:\Windows\system32\schtasks.exe" /create /sc minute /mo 2 /tn PDF /tr C:\ProgramData\PDF\PDF.vbs

C:\Windows\System32\WScript.exe

C:\Windows\System32\WScript.exe "C:\ProgramData\PDF\PDF.vbs"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\ProgramData\PDF\1.bat" "

C:\Windows\system32\cmd.exe

CMD /C powershell -NOP -WIND HIDDEN -eXEC BYPASS -NONI "C:\ProgramData\PDF\PDF.ps1"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -NOP -WIND HIDDEN -eXEC BYPASS -NONI "C:\ProgramData\PDF\PDF.ps1"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 40.125.122.176:443 tcp
US 20.189.173.4:443 tcp
US 40.125.122.176:443 tcp
US 8.8.8.8:53 0.77.109.52.in-addr.arpa udp
US 117.18.237.29:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 40.125.122.176:443 tcp
IE 20.54.89.15:443 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 2.36.159.162.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 ghoss.freeddns.org udp
DE 85.215.205.213:8808 ghoss.freeddns.org tcp
US 8.8.8.8:53 213.205.215.85.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yqqzirya.lxy.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4680-138-0x000001CE4E880000-0x000001CE4E8A2000-memory.dmp

memory/4680-143-0x000001CE4C6D0000-0x000001CE4C6E0000-memory.dmp

memory/4680-144-0x000001CE4C6D0000-0x000001CE4C6E0000-memory.dmp

memory/4680-145-0x000001CE4C6D0000-0x000001CE4C6E0000-memory.dmp

memory/4680-150-0x000001CE4C6D0000-0x000001CE4C6E0000-memory.dmp

memory/4680-151-0x000001CE4C6D0000-0x000001CE4C6E0000-memory.dmp

memory/4680-152-0x000001CE4C6D0000-0x000001CE4C6E0000-memory.dmp

C:\ProgramData\PDF\PDF.vbs

MD5 30e4773314799aa0e1fd7761cae6e609
SHA1 d1b5a371a7555e99a7602ae6ee8028ac0f0462c4
SHA256 dc592583d072f325b7a0a54d53499f32ef95c731344cc10400f0bb03e7db4720
SHA512 fcbeca634cb6fe2d0ea4f726f09b4a35917615467a562e9d73cd235cd337bb797fb6a996f0569e83f4f858c0226b84fbd2d0721bea47d1039e5ffe6ebca0bb8d

C:\ProgramData\PDF\1.bat

MD5 a7f20549327da521bf176b6faa76e623
SHA1 b9b22202b9d3d43ffa6cbf2f3f81dc7f5b06c605
SHA256 a2099940d9f7f9a0a603a5a36ef2b24eef49f2cb428539949a6d75261faaba46
SHA512 5cac6f996aa1bb4dd11a39d3001da243c6f020bc1a3d86a36ec773d45e479514b006e3b3d8782b1eaab628d0fefdb987495308b9c88f38667f875179771f4823

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 223bd4ae02766ddc32e6145fd1a29301
SHA1 900cfd6526d7e33fb4039a1cc2790ea049bc2c5b
SHA256 1022ec2fed08ff473817fc53893e192a8e33e6a16f3d2c8cb6fd37f49c938e1e
SHA512 648cd3f8a89a18128d2b1bf960835e087a74cdbc783dbfcc712b3cb9e3a2e4f715e534ba2ef81d89af8f60d4882f6859373248c875ceb26ad0922e891f2e74cc

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 bd84a249acecea9fba0df3d01b8305c0
SHA1 c7161dbd390d2d64925a9f987b1e41f42eca1d4d
SHA256 aea560ffda4a850a53cda513f0b5b50322563d52690fe5b07764615638d8e160
SHA512 d8897507207440daada3ff7ff33976bac8281dea68424174c799bd4b68e0358bab395246c0f1d4c13328d7f478b218ab9e1be8959b32f28a1eeba199c746f676

C:\ProgramData\PDF\PDF.ps1

MD5 ee39cd0d14321044da4e3e548392983c
SHA1 4f04ebde6c0d04a5837bc81d062d7b14f7738168
SHA256 86f1d81d4d4f866442b384394e35d1a8058bbe843cc0d8896b1655d3ab3cf886
SHA512 bd2817d4ef8367a0c2f7dfc838aef559c16a703d95f887b053da3bde95f4ab709cbbfde2b22c829d9dccb52abb8a708868a0f327031eeae9584764d3fc3a7ad4

memory/5000-170-0x0000014C9D880000-0x0000014C9D890000-memory.dmp

memory/5000-171-0x0000014C9D880000-0x0000014C9D890000-memory.dmp

memory/3148-172-0x0000000000400000-0x0000000000416000-memory.dmp

memory/3148-174-0x00000000051B0000-0x00000000051C0000-memory.dmp

memory/3148-175-0x00000000059B0000-0x0000000005F54000-memory.dmp

memory/3148-176-0x00000000055E0000-0x0000000005672000-memory.dmp

memory/3148-177-0x00000000055D0000-0x00000000055DA000-memory.dmp

memory/3148-178-0x00000000060A0000-0x000000000613C000-memory.dmp

memory/3148-179-0x0000000006140000-0x00000000061A6000-memory.dmp