asyncrat | 054cde86997158b8d0515e30ca53b657ef96d212987a89f7eb3b76e7fe727d62

Analysis

max time kernel
155s
max time network
148s
platform
windows7_x64
resource
win7-en-20211208
submitted
07/02/2022, 09:41

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General

Target
7f910c7b5df4e3c965864a2d864b5bd0.exe
Size 605KB
Sample220207-lnrx2aaffn
SHA256 054cde86997158b8d0515e30ca53b657ef96d212987a89f7eb3b76e7fe727d62
MD5 7f910c7b5df4e3c965864a2d864b5bd0
SHA1 bbba406786312c204eae82c5a9a32b7aa6b8488c
SHA512 a645e48fbd11d16c24c6daf95d1b9bf2d4e674e2aa58a79eadea5314aaf4c743961e7541b4be96207177ddb6e9c17e33aca43591ce13f994ae06d2c3eb0427ec
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat suricata

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/364-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/364-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/364-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/364-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 3 IoCs

pid	Process
1632	images.exe
1904	images.exe
1316	images.exe

Loads dropped DLL 1 IoCs

pid	Process
1540	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1476 set thread context of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1632 set thread context of 1316	1632	images.exe	46

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
768	schtasks.exe
756	schtasks.exe
1732	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1680	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
872	powershell.exe
364	7f910c7b5df4e3c965864a2d864b5bd0.exe
364	7f910c7b5df4e3c965864a2d864b5bd0.exe
364	7f910c7b5df4e3c965864a2d864b5bd0.exe
1632	images.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	872	powershell.exe
Token: SeDebugPrivilege	364	7f910c7b5df4e3c965864a2d864b5bd0.exe
Token: SeDebugPrivilege	1632	images.exe
Token: SeDebugPrivilege	1316	images.exe

Suspicious use of WriteProcessMemory 58 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 872	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	29
PID 1476 wrote to memory of 872	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	29
PID 1476 wrote to memory of 872	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	29
PID 1476 wrote to memory of 872	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	29
PID 1476 wrote to memory of 768	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	31
PID 1476 wrote to memory of 768	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	31
PID 1476 wrote to memory of 768	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	31
PID 1476 wrote to memory of 768	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	31
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 1476 wrote to memory of 364	1476	7f910c7b5df4e3c965864a2d864b5bd0.exe	33
PID 364 wrote to memory of 1504	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	34
PID 364 wrote to memory of 1504	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	34
PID 364 wrote to memory of 1504	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	34
PID 364 wrote to memory of 1504	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	34
PID 364 wrote to memory of 1540	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	36
PID 364 wrote to memory of 1540	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	36
PID 364 wrote to memory of 1540	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	36
PID 364 wrote to memory of 1540	364	7f910c7b5df4e3c965864a2d864b5bd0.exe	36
PID 1504 wrote to memory of 756	1504	cmd.exe	38
PID 1504 wrote to memory of 756	1504	cmd.exe	38
PID 1504 wrote to memory of 756	1504	cmd.exe	38
PID 1504 wrote to memory of 756	1504	cmd.exe	38
PID 1540 wrote to memory of 1680	1540	cmd.exe	39
PID 1540 wrote to memory of 1680	1540	cmd.exe	39
PID 1540 wrote to memory of 1680	1540	cmd.exe	39
PID 1540 wrote to memory of 1680	1540	cmd.exe	39
PID 1540 wrote to memory of 1632	1540	cmd.exe	40
PID 1540 wrote to memory of 1632	1540	cmd.exe	40
PID 1540 wrote to memory of 1632	1540	cmd.exe	40
PID 1540 wrote to memory of 1632	1540	cmd.exe	40
PID 1632 wrote to memory of 624	1632	images.exe	41
PID 1632 wrote to memory of 624	1632	images.exe	41
PID 1632 wrote to memory of 624	1632	images.exe	41
PID 1632 wrote to memory of 624	1632	images.exe	41
PID 1632 wrote to memory of 1732	1632	images.exe	43
PID 1632 wrote to memory of 1732	1632	images.exe	43
PID 1632 wrote to memory of 1732	1632	images.exe	43
PID 1632 wrote to memory of 1732	1632	images.exe	43
PID 1632 wrote to memory of 1904	1632	images.exe	45
PID 1632 wrote to memory of 1904	1632	images.exe	45
PID 1632 wrote to memory of 1904	1632	images.exe	45
PID 1632 wrote to memory of 1904	1632	images.exe	45
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46
PID 1632 wrote to memory of 1316	1632	images.exe	46

C:\Users\Admin\AppData\Local\Temp\7f910c7b5df4e3c965864a2d864b5bd0.exe
"C:\Users\Admin\AppData\Local\Temp\7f910c7b5df4e3c965864a2d864b5bd0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1476
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\meudHoU.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:872
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\meudHoU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2818.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:768
- C:\Users\Admin\AppData\Local\Temp\7f910c7b5df4e3c965864a2d864b5bd0.exe
  "C:\Users\Admin\AppData\Local\Temp\7f910c7b5df4e3c965864a2d864b5bd0.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:364
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1504
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"'
      4⤵
      Creates scheduled task(s)
      PID:756
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp693D.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1540
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1680
  - - C:\Users\Admin\AppData\Roaming\images.exe
      "C:\Users\Admin\AppData\Roaming\images.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1632
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\meudHoU.exe"
        5⤵
        
        PID:624
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\meudHoU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFED7.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:1732
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "C:\Users\Admin\AppData\Roaming\images.exe"
        5⤵
        Executes dropped EXE
        
        PID:1904
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "C:\Users\Admin\AppData\Roaming\images.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1316

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/364-68-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/364-66-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/364-67-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/364-65-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/364-69-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/364-70-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/364-72-0x0000000004C40000-0x0000000004C41000-memory.dmp

Download

memory/872-62-0x0000000002420000-0x000000000306A000-memory.dmp

Download

memory/872-64-0x0000000002420000-0x000000000306A000-memory.dmp

Download

memory/1316-89-0x0000000004C20000-0x0000000004C21000-memory.dmp

Download

memory/1476-57-0x00000000008B0000-0x00000000008BC000-memory.dmp

Download

memory/1476-55-0x0000000076491000-0x0000000076493000-memory.dmp

Download

memory/1476-54-0x0000000001000000-0x000000000109E000-memory.dmp

Download

memory/1476-56-0x0000000004E40000-0x0000000004E41000-memory.dmp

Download

memory/1476-58-0x0000000005210000-0x0000000005280000-memory.dmp

Download

memory/1632-77-0x0000000000EF0000-0x0000000000F8E000-memory.dmp

Download

memory/1632-79-0x0000000004D10000-0x0000000004D11000-memory.dmp

Download