asyncrat | 1426bcfb50fbfd748ccf84cfb2c106ac52f5f2ef82b70a7be46e8f473c701658

Analysis

max time kernel
121s
max time network
148s
platform
windows10_x64
resource
win10-en-20211208
submitted
16/12/2021, 08:33

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General

Target
2aaeb72e001240b1515740ff883c0f4f.exe
Size 393KB
Sample211216-kfvhhsccen
SHA256 1426bcfb50fbfd748ccf84cfb2c106ac52f5f2ef82b70a7be46e8f473c701658
MD5 2aaeb72e001240b1515740ff883c0f4f
SHA1 61284b7a0ceba6246fa1b9ba527270cf8a916439
SHA512 54b9792f7d4633aff4e32ae1fc3998932d7b9f8c7d305641b0cff0ce1193c7ed7063c947419046754167ee154faf7e062d25f599160187db8010ff957d39c886
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 3 IoCs

rat

resource	yara_rule
behavioral2/memory/832-128-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/832-129-0x000000000040D05E-mapping.dmp	asyncrat
behavioral2/memory/1664-157-0x000000000040D05E-mapping.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3184	images.exe
1664	images.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2656 set thread context of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 3184 set thread context of 1664	3184	images.exe	81

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
836	schtasks.exe
2752	schtasks.exe
4076	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2264	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe
832	2aaeb72e001240b1515740ff883c0f4f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	832	2aaeb72e001240b1515740ff883c0f4f.exe
Token: SeDebugPrivilege	1664	images.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 836	2656	2aaeb72e001240b1515740ff883c0f4f.exe	69
PID 2656 wrote to memory of 836	2656	2aaeb72e001240b1515740ff883c0f4f.exe	69
PID 2656 wrote to memory of 836	2656	2aaeb72e001240b1515740ff883c0f4f.exe	69
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 2656 wrote to memory of 832	2656	2aaeb72e001240b1515740ff883c0f4f.exe	71
PID 832 wrote to memory of 1564	832	2aaeb72e001240b1515740ff883c0f4f.exe	72
PID 832 wrote to memory of 1564	832	2aaeb72e001240b1515740ff883c0f4f.exe	72
PID 832 wrote to memory of 1564	832	2aaeb72e001240b1515740ff883c0f4f.exe	72
PID 832 wrote to memory of 1156	832	2aaeb72e001240b1515740ff883c0f4f.exe	73
PID 832 wrote to memory of 1156	832	2aaeb72e001240b1515740ff883c0f4f.exe	73
PID 832 wrote to memory of 1156	832	2aaeb72e001240b1515740ff883c0f4f.exe	73
PID 1564 wrote to memory of 2752	1564	cmd.exe	76
PID 1564 wrote to memory of 2752	1564	cmd.exe	76
PID 1564 wrote to memory of 2752	1564	cmd.exe	76
PID 1156 wrote to memory of 2264	1156	cmd.exe	77
PID 1156 wrote to memory of 2264	1156	cmd.exe	77
PID 1156 wrote to memory of 2264	1156	cmd.exe	77
PID 1156 wrote to memory of 3184	1156	cmd.exe	78
PID 1156 wrote to memory of 3184	1156	cmd.exe	78
PID 1156 wrote to memory of 3184	1156	cmd.exe	78
PID 3184 wrote to memory of 4076	3184	images.exe	79
PID 3184 wrote to memory of 4076	3184	images.exe	79
PID 3184 wrote to memory of 4076	3184	images.exe	79
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81
PID 3184 wrote to memory of 1664	3184	images.exe	81

C:\Users\Admin\AppData\Local\Temp\2aaeb72e001240b1515740ff883c0f4f.exe
"C:\Users\Admin\AppData\Local\Temp\2aaeb72e001240b1515740ff883c0f4f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\skhbzXgOUUR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9C0.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:836
- C:\Users\Admin\AppData\Local\Temp\2aaeb72e001240b1515740ff883c0f4f.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:832
- - 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:1564
  - - 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:2752
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp20B3.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1156
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2264
  - - C:\Users\Admin\AppData\Roaming\images.exe
      "C:\Users\Admin\AppData\Roaming\images.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:3184
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\skhbzXgOUUR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9547.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:4076
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1664

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/832-128-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/832-133-0x0000000005070000-0x0000000005071000-memory.dmp

Download

memory/1664-162-0x0000000005A10000-0x0000000005A11000-memory.dmp

Download

memory/1664-165-0x0000000005E80000-0x0000000005E81000-memory.dmp

Download

memory/2656-124-0x0000000007A30000-0x0000000007A90000-memory.dmp

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memory/2656-120-0x0000000005540000-0x0000000005541000-memory.dmp

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memory/2656-125-0x0000000007AD0000-0x0000000007ADE000-memory.dmp

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memory/2656-117-0x0000000005470000-0x0000000005471000-memory.dmp

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memory/2656-115-0x0000000000C30000-0x0000000000C31000-memory.dmp

Download

memory/2656-123-0x0000000005590000-0x0000000005A8E000-memory.dmp

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memory/2656-118-0x0000000005A90000-0x0000000005A91000-memory.dmp

Download

memory/2656-119-0x0000000005630000-0x0000000005631000-memory.dmp

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memory/2656-122-0x0000000005A30000-0x0000000005A35000-memory.dmp

Download

memory/2656-121-0x00000000056D0000-0x00000000056D1000-memory.dmp

Download

memory/3184-150-0x0000000005490000-0x000000000598E000-memory.dmp

Download