asyncrat | f05cde9f4e88822acaeda030013c839ba2b46ee74dda0849ad83fb455552e446

Analysis

max time kernel
146s
max time network
147s
platform
windows7_x64
resource
win7-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 7 IoCs

rat

resource	yara_rule
behavioral1/memory/1160-66-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1160-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1160-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1160-69-0x000000000040D05E-mapping.dmp	asyncrat
behavioral1/memory/1160-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/992-96-0x000000000040D05E-mapping.dmp	asyncrat
behavioral1/memory/992-98-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1764	images.exe
992	images.exe

Loads dropped DLL 1 IoCs

pid	Process
2044	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1080 set thread context of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1764 set thread context of 992	1764	images.exe	40

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
540	schtasks.exe
1336	schtasks.exe
568	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1448	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1160	783c44c79e68cfc24fc9aa6215268af5.exe
1764	images.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1160	783c44c79e68cfc24fc9aa6215268af5.exe
Token: SeDebugPrivilege	1764	images.exe
Token: SeDebugPrivilege	992	images.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 540	1080	783c44c79e68cfc24fc9aa6215268af5.exe	28
PID 1080 wrote to memory of 540	1080	783c44c79e68cfc24fc9aa6215268af5.exe	28
PID 1080 wrote to memory of 540	1080	783c44c79e68cfc24fc9aa6215268af5.exe	28
PID 1080 wrote to memory of 540	1080	783c44c79e68cfc24fc9aa6215268af5.exe	28
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1080 wrote to memory of 1160	1080	783c44c79e68cfc24fc9aa6215268af5.exe	30
PID 1160 wrote to memory of 1536	1160	783c44c79e68cfc24fc9aa6215268af5.exe	31
PID 1160 wrote to memory of 1536	1160	783c44c79e68cfc24fc9aa6215268af5.exe	31
PID 1160 wrote to memory of 1536	1160	783c44c79e68cfc24fc9aa6215268af5.exe	31
PID 1160 wrote to memory of 1536	1160	783c44c79e68cfc24fc9aa6215268af5.exe	31
PID 1160 wrote to memory of 2044	1160	783c44c79e68cfc24fc9aa6215268af5.exe	33
PID 1160 wrote to memory of 2044	1160	783c44c79e68cfc24fc9aa6215268af5.exe	33
PID 1160 wrote to memory of 2044	1160	783c44c79e68cfc24fc9aa6215268af5.exe	33
PID 1160 wrote to memory of 2044	1160	783c44c79e68cfc24fc9aa6215268af5.exe	33
PID 1536 wrote to memory of 1336	1536	cmd.exe	35
PID 1536 wrote to memory of 1336	1536	cmd.exe	35
PID 1536 wrote to memory of 1336	1536	cmd.exe	35
PID 1536 wrote to memory of 1336	1536	cmd.exe	35
PID 2044 wrote to memory of 1448	2044	cmd.exe	36
PID 2044 wrote to memory of 1448	2044	cmd.exe	36
PID 2044 wrote to memory of 1448	2044	cmd.exe	36
PID 2044 wrote to memory of 1448	2044	cmd.exe	36
PID 2044 wrote to memory of 1764	2044	cmd.exe	37
PID 2044 wrote to memory of 1764	2044	cmd.exe	37
PID 2044 wrote to memory of 1764	2044	cmd.exe	37
PID 2044 wrote to memory of 1764	2044	cmd.exe	37
PID 1764 wrote to memory of 568	1764	images.exe	38
PID 1764 wrote to memory of 568	1764	images.exe	38
PID 1764 wrote to memory of 568	1764	images.exe	38
PID 1764 wrote to memory of 568	1764	images.exe	38
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40
PID 1764 wrote to memory of 992	1764	images.exe	40

C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe
"C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ycFPDVGwLXvol" /XML "C:\Users\Admin\AppData\Local\Temp\tmp386E.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:540
- C:\Users\Admin\AppData\Local\Temp\783c44c79e68cfc24fc9aa6215268af5.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1160
- - 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:1536
  - - 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:1336
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp50DE.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2044
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1448
  - - 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:1764
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ycFPDVGwLXvol" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC320.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:568
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:992

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/992-101-0x0000000004C20000-0x0000000004C21000-memory.dmp

Download

memory/992-98-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/1080-60-0x0000000005560000-0x00000000055C0000-memory.dmp

Download

memory/1080-55-0x0000000000BB0000-0x0000000000BB1000-memory.dmp

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memory/1080-61-0x00000000005F0000-0x00000000005FE000-memory.dmp

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memory/1080-59-0x0000000000390000-0x0000000000395000-memory.dmp

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memory/1080-58-0x0000000004CB0000-0x0000000004CB1000-memory.dmp

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memory/1080-57-0x0000000075731000-0x0000000075733000-memory.dmp

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memory/1160-64-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1160-65-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1160-66-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1160-73-0x00000000047A0000-0x00000000047A1000-memory.dmp

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memory/1160-67-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1160-68-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1160-70-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1764-85-0x00000000011B0000-0x00000000011B1000-memory.dmp

Download

memory/1764-83-0x0000000001210000-0x0000000001211000-memory.dmp

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