asyncrat | f05cde9f4e88822acaeda030013c839ba2b46ee74dda0849ad83fb455552e446

Analysis

max time kernel
151s
max time network
151s
platform
windows10_x64
resource
win10-en-20211104
submitted
06/12/2021, 17:30

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General

Target
783c44c79e68cfc24fc9aa6215268af5.exe
Size 349KB
Sample211206-v26ssaefep
SHA256 f05cde9f4e88822acaeda030013c839ba2b46ee74dda0849ad83fb455552e446
MD5 783c44c79e68cfc24fc9aa6215268af5
SHA1 ebf4f2bf54851fbf9fafb25b026e29f4ff2da97d
SHA512 c7e540c1ff99e4f2aafad8fd65cb68a86c9c5f05021097a9b0867de80c79d8d64e177d00ac5155de039dfb223310dff999bb227bc34232cdcfbdfa92f8e6d3b8
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/3860-131-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/3860-132-0x000000000040D05E-mapping.dmp	asyncrat
behavioral2/memory/1236-154-0x0000000004E70000-0x000000000536E000-memory.dmp	asyncrat
behavioral2/memory/2464-160-0x000000000040D05E-mapping.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1236	images.exe
2464	images.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3660 set thread context of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 1236 set thread context of 2464	1236	images.exe	82

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
3172	schtasks.exe
316	schtasks.exe
2160	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1052	timeout.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
3660	783c44c79e68cfc24fc9aa6215268af5.exe
3660	783c44c79e68cfc24fc9aa6215268af5.exe
3660	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
3860	783c44c79e68cfc24fc9aa6215268af5.exe
1236	images.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3660	783c44c79e68cfc24fc9aa6215268af5.exe
Token: SeDebugPrivilege	3860	783c44c79e68cfc24fc9aa6215268af5.exe
Token: SeDebugPrivilege	1236	images.exe
Token: SeDebugPrivilege	2464	images.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 3660 wrote to memory of 3172	3660	783c44c79e68cfc24fc9aa6215268af5.exe	69
PID 3660 wrote to memory of 3172	3660	783c44c79e68cfc24fc9aa6215268af5.exe	69
PID 3660 wrote to memory of 3172	3660	783c44c79e68cfc24fc9aa6215268af5.exe	69
PID 3660 wrote to memory of 3800	3660	783c44c79e68cfc24fc9aa6215268af5.exe	71
PID 3660 wrote to memory of 3800	3660	783c44c79e68cfc24fc9aa6215268af5.exe	71
PID 3660 wrote to memory of 3800	3660	783c44c79e68cfc24fc9aa6215268af5.exe	71
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3660 wrote to memory of 3860	3660	783c44c79e68cfc24fc9aa6215268af5.exe	72
PID 3860 wrote to memory of 432	3860	783c44c79e68cfc24fc9aa6215268af5.exe	73
PID 3860 wrote to memory of 432	3860	783c44c79e68cfc24fc9aa6215268af5.exe	73
PID 3860 wrote to memory of 432	3860	783c44c79e68cfc24fc9aa6215268af5.exe	73
PID 3860 wrote to memory of 520	3860	783c44c79e68cfc24fc9aa6215268af5.exe	75
PID 3860 wrote to memory of 520	3860	783c44c79e68cfc24fc9aa6215268af5.exe	75
PID 3860 wrote to memory of 520	3860	783c44c79e68cfc24fc9aa6215268af5.exe	75
PID 432 wrote to memory of 316	432	cmd.exe	77
PID 432 wrote to memory of 316	432	cmd.exe	77
PID 432 wrote to memory of 316	432	cmd.exe	77
PID 520 wrote to memory of 1052	520	cmd.exe	78
PID 520 wrote to memory of 1052	520	cmd.exe	78
PID 520 wrote to memory of 1052	520	cmd.exe	78
PID 520 wrote to memory of 1236	520	cmd.exe	79
PID 520 wrote to memory of 1236	520	cmd.exe	79
PID 520 wrote to memory of 1236	520	cmd.exe	79
PID 1236 wrote to memory of 2160	1236	images.exe	80
PID 1236 wrote to memory of 2160	1236	images.exe	80
PID 1236 wrote to memory of 2160	1236	images.exe	80
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82
PID 1236 wrote to memory of 2464	1236	images.exe	82

C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe
"C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3660
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ycFPDVGwLXvol" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA7B.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3172
- C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe
  "{path}"
  2⤵
  PID:3800
- C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3860
- - 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:432
  - - 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:316
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2046.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:520
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1052
  - - 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:1236
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ycFPDVGwLXvol" /XML "C:\Users\Admin\AppData\Local\Temp\tmp918E.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:2160
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2464

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

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Downloads

memory/1236-154-0x0000000004E70000-0x000000000536E000-memory.dmp

Download

memory/2464-164-0x0000000003130000-0x0000000003131000-memory.dmp

Download

memory/3660-128-0x0000000005660000-0x000000000566E000-memory.dmp

Download

memory/3660-126-0x00000000054D0000-0x00000000054D5000-memory.dmp

Download

memory/3660-125-0x00000000053E0000-0x00000000058DE000-memory.dmp

Download

memory/3660-124-0x00000000055F0000-0x00000000055F1000-memory.dmp

Download

memory/3660-118-0x0000000000A30000-0x0000000000A31000-memory.dmp

Download

memory/3660-123-0x0000000005290000-0x0000000005291000-memory.dmp

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memory/3660-122-0x00000000053E0000-0x00000000053E1000-memory.dmp

Download

memory/3660-127-0x0000000007870000-0x00000000078D0000-memory.dmp

Download

memory/3660-121-0x00000000058E0000-0x00000000058E1000-memory.dmp

Download

memory/3660-120-0x0000000005310000-0x0000000005311000-memory.dmp

Download

memory/3860-131-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/3860-136-0x0000000005850000-0x0000000005851000-memory.dmp

Download