asyncrat | 425949b7d7a276e9f0f8ef29bb4f095acd84a40538cbf5141af0af3c011eb16f

Analysis

max time kernel
146s
max time network
155s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 19:11

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General

Target

image.exe
Size

808KB
MD5

ae15992ecc241654997b0e4bcfaa07b3
SHA1

9ef2cb53adea59c6045a492d7b7317ecb3998373
SHA256

cf3dab2a4ba21609762dff658b3b6831f2ae5976adfe0aed8f76090d30c7f1b3
SHA512

7654e5a81945f357b252c51189d1ddacc941184a9800723c955a0ed3d463fc82872d31b352184886b9ae20d0b34e906892e765577d6819bcadbfba98f0145ab3
SSDEEP

12288:FUDM6VWVHA/L5DnbH22qla5w/yXbxFPkWtslyfZGxrNDFhmlUv2Ju:FUDM6VWKNbH0MW/IbxQ0RK5fv2Ju

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

185.140.53.131:7171

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
image.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2844	image.exe
1368	image.exe

Loads dropped DLL 1 IoCs

pid	Process
1260	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2160 set thread context of 2200	2160	image.exe	35
PID 2844 set thread context of 1368	2844	image.exe	49

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	image.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	image.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	image.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	image.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Delays execution with timeout.exe 3 IoCs

evasion

pid	Process
2612	timeout.exe
1480	timeout.exe
3060	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3048	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2700	powershell.exe
2160	image.exe
2160	image.exe
2200	image.exe
2200	image.exe
2200	image.exe
2272	powershell.exe
2844	image.exe
2844	image.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2160	image.exe
Token: SeDebugPrivilege	2200	image.exe
Token: SeDebugPrivilege	2272	powershell.exe
Token: SeDebugPrivilege	2844	image.exe
Token: SeDebugPrivilege	1368	image.exe

Suspicious use of WriteProcessMemory 62 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2700	2160	image.exe	30
PID 2160 wrote to memory of 2700	2160	image.exe	30
PID 2160 wrote to memory of 2700	2160	image.exe	30
PID 2160 wrote to memory of 2700	2160	image.exe	30
PID 2160 wrote to memory of 2628	2160	image.exe	32
PID 2160 wrote to memory of 2628	2160	image.exe	32
PID 2160 wrote to memory of 2628	2160	image.exe	32
PID 2160 wrote to memory of 2628	2160	image.exe	32
PID 2628 wrote to memory of 2612	2628	cmd.exe	34
PID 2628 wrote to memory of 2612	2628	cmd.exe	34
PID 2628 wrote to memory of 2612	2628	cmd.exe	34
PID 2628 wrote to memory of 2612	2628	cmd.exe	34
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2160 wrote to memory of 2200	2160	image.exe	35
PID 2200 wrote to memory of 1160	2200	image.exe	36
PID 2200 wrote to memory of 1160	2200	image.exe	36
PID 2200 wrote to memory of 1160	2200	image.exe	36
PID 2200 wrote to memory of 1160	2200	image.exe	36
PID 2200 wrote to memory of 1260	2200	image.exe	38
PID 2200 wrote to memory of 1260	2200	image.exe	38
PID 2200 wrote to memory of 1260	2200	image.exe	38
PID 2200 wrote to memory of 1260	2200	image.exe	38
PID 1160 wrote to memory of 3048	1160	cmd.exe	40
PID 1160 wrote to memory of 3048	1160	cmd.exe	40
PID 1160 wrote to memory of 3048	1160	cmd.exe	40
PID 1160 wrote to memory of 3048	1160	cmd.exe	40
PID 1260 wrote to memory of 1480	1260	cmd.exe	41
PID 1260 wrote to memory of 1480	1260	cmd.exe	41
PID 1260 wrote to memory of 1480	1260	cmd.exe	41
PID 1260 wrote to memory of 1480	1260	cmd.exe	41
PID 1260 wrote to memory of 2844	1260	cmd.exe	42
PID 1260 wrote to memory of 2844	1260	cmd.exe	42
PID 1260 wrote to memory of 2844	1260	cmd.exe	42
PID 1260 wrote to memory of 2844	1260	cmd.exe	42
PID 2844 wrote to memory of 2272	2844	image.exe	43
PID 2844 wrote to memory of 2272	2844	image.exe	43
PID 2844 wrote to memory of 2272	2844	image.exe	43
PID 2844 wrote to memory of 2272	2844	image.exe	43
PID 2844 wrote to memory of 2156	2844	image.exe	45
PID 2844 wrote to memory of 2156	2844	image.exe	45
PID 2844 wrote to memory of 2156	2844	image.exe	45
PID 2844 wrote to memory of 2156	2844	image.exe	45
PID 2156 wrote to memory of 3060	2156	cmd.exe	47
PID 2156 wrote to memory of 3060	2156	cmd.exe	47
PID 2156 wrote to memory of 3060	2156	cmd.exe	47
PID 2156 wrote to memory of 3060	2156	cmd.exe	47
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49
PID 2844 wrote to memory of 1368	2844	image.exe	49

C:\Users\Admin\AppData\Local\Temp\image.exe
"C:\Users\Admin\AppData\Local\Temp\image.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Start-Sleep -Seconds 10;Start-Sleep -Seconds 10;
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 20
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2628
- - C:\Windows\SysWOW64\timeout.exe
    timeout 20
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2612
- C:\Users\Admin\AppData\Local\Temp\image.exe
  C:\Users\Admin\AppData\Local\Temp\image.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "image" /tr '"C:\Users\Admin\AppData\Roaming\image.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1160
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "image" /tr '"C:\Users\Admin\AppData\Roaming\image.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:3048
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC3AD.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1260
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:1480
  - - C:\Users\Admin\AppData\Roaming\image.exe
      "C:\Users\Admin\AppData\Roaming\image.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2844
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" Start-Sleep -Seconds 10;Start-Sleep -Seconds 10;
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2272
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c timeout 20
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2156
      - C:\Windows\SysWOW64\timeout.exe
        
        timeout 20
        6⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:3060
    - - C:\Users\Admin\AppData\Roaming\image.exe
        
        C:\Users\Admin\AppData\Roaming\image.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:1368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC3AD.tmp.bat

Filesize
149B

MD5
9b13b88164cca11d433da21a831ca4af

SHA1
a7a11ec5469d87e88513bb8b2a1d0c0e19499ba1

SHA256
e65a5a559e9ce327fc85845362803e9711fec1d3e98179694216236f3b75148e

SHA512
11a2f7ba07d96dd33e9889efbe22be34e256df51e5ffad36cc2e6bbdd19b10d8d91604ca7341228c126466adb17a5bace7777b1ff34f068abfe0cb5328b694b6

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
95fc81bc72ad63a2018398c3c528929e

SHA1
3384ebc50de1e64c5916c355618190f67d58229a

SHA256
cecd034656289607c018608e8823ac79fb2ae5292a9d5c4d68cff01a43b476fd

SHA512
e5af555f7a088de2d8bc439ae09522464f7c888b1e7df0e84393de2f403915bebd7c9263c1cea8365de749f1cb1fa0bf33cb9a5924ce19de70517f250380c273

Download Submit
\Users\Admin\AppData\Roaming\image.exe

Filesize
808KB

MD5
ae15992ecc241654997b0e4bcfaa07b3

SHA1
9ef2cb53adea59c6045a492d7b7317ecb3998373

SHA256
cf3dab2a4ba21609762dff658b3b6831f2ae5976adfe0aed8f76090d30c7f1b3

SHA512
7654e5a81945f357b252c51189d1ddacc941184a9800723c955a0ed3d463fc82872d31b352184886b9ae20d0b34e906892e765577d6819bcadbfba98f0145ab3

Download Submit
memory/1368-59-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1368-60-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1368-56-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2160-8-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2160-0-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2160-1-0x00000000012B0000-0x0000000001380000-memory.dmp

Filesize
832KB

Download
memory/2160-11-0x0000000000BF0000-0x0000000000CAE000-memory.dmp

Filesize
760KB

Download
memory/2160-12-0x00000000005F0000-0x0000000000630000-memory.dmp

Filesize
256KB

Download
memory/2160-13-0x0000000000E90000-0x0000000000EDC000-memory.dmp

Filesize
304KB

Download
memory/2160-14-0x00000000005F0000-0x0000000000630000-memory.dmp

Filesize
256KB

Download
memory/2200-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2200-27-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2200-22-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2200-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2200-25-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2200-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2200-26-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2200-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2700-10-0x00000000714B0000-0x0000000071A5B000-memory.dmp

Filesize
5.7MB

Download
memory/2700-9-0x00000000714B0000-0x0000000071A5B000-memory.dmp

Filesize
5.7MB

Download
memory/2700-7-0x00000000714B0000-0x0000000071A5B000-memory.dmp

Filesize
5.7MB

Download
memory/2700-5-0x00000000714B0000-0x0000000071A5B000-memory.dmp

Filesize
5.7MB

Download
memory/2700-6-0x00000000714B0000-0x0000000071A5B000-memory.dmp

Filesize
5.7MB

Download
memory/2700-4-0x00000000714B1000-0x00000000714B2000-memory.dmp

Filesize
4KB

Download
memory/2844-40-0x0000000001150000-0x0000000001220000-memory.dmp

Filesize
832KB

Download