asyncrat | cc16889abbfe38386a105e602d856c512a2dfd51795ad55092ab27983e70b3b5

Analysis

max time kernel
145s
max time network
147s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
31/01/2025, 04:36

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General

Target
MoonStealer-main/install.bat
Size 95B
Sample250131-e8bm8a1jar
SHA256 9fa41aabbfef72bc8a6d3342b2f399a82c2f6ec7bc14e46bc1d3dcacd4f5d3c3
MD5 7c928c6358b7d280aff4be1ff2ac7c29
SHA1 6e9014938d6d05791cfba2473397ad7e39ae5881
SHA512 a6558bb4e546cd87b7787117741d01e8ed936b3ecaef32855533b1e4cd54d068e9f75ec560304a445c56605aebec8f2070f51c2e3b20661a3688c8a811677dd9
MD5 SHA1 SHA512

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

23.94.99.6:6606
23.94.99.6:7707
23.94.99.6:8808
23.94.99.6:4782

Mutex

qdWLYmlsI9yW

Attributes

delay
3
install
true
install_file
required.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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral9/files/0x000b0000000122cf-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2556	required.exe

Loads dropped DLL 1 IoCs

pid	Process
2712	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	required.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2064	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
2580	schtasks.exe

Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

pid	Process
2740	updater.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2740	updater.exe
2740	updater.exe
2740	updater.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2740	updater.exe
Token: SeDebugPrivilege	2556	required.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 1884 wrote to memory of 2740	1884	cmd.exe	31
PID 2740 wrote to memory of 2696	2740	updater.exe	32
PID 2740 wrote to memory of 2696	2740	updater.exe	32
PID 2740 wrote to memory of 2696	2740	updater.exe	32
PID 2740 wrote to memory of 2696	2740	updater.exe	32
PID 2740 wrote to memory of 2712	2740	updater.exe	34
PID 2740 wrote to memory of 2712	2740	updater.exe	34
PID 2740 wrote to memory of 2712	2740	updater.exe	34
PID 2740 wrote to memory of 2712	2740	updater.exe	34
PID 2696 wrote to memory of 2580	2696	cmd.exe	36
PID 2696 wrote to memory of 2580	2696	cmd.exe	36
PID 2696 wrote to memory of 2580	2696	cmd.exe	36
PID 2696 wrote to memory of 2580	2696	cmd.exe	36
PID 2712 wrote to memory of 2064	2712	cmd.exe	37
PID 2712 wrote to memory of 2064	2712	cmd.exe	37
PID 2712 wrote to memory of 2064	2712	cmd.exe	37
PID 2712 wrote to memory of 2064	2712	cmd.exe	37
PID 2712 wrote to memory of 2556	2712	cmd.exe	38
PID 2712 wrote to memory of 2556	2712	cmd.exe	38
PID 2712 wrote to memory of 2556	2712	cmd.exe	38
PID 2712 wrote to memory of 2556	2712	cmd.exe	38

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\MoonStealer-main\install.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1884
- C:\Users\Admin\AppData\Local\Temp\MoonStealer-main\MoonStealer_assets\upx\updater.exe
  .\MoonStealer_assets\upx\updater.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: CmdExeWriteProcessMemorySpam
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "required" /tr '"C:\Users\Admin\AppData\Roaming\required.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2696
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "required" /tr '"C:\Users\Admin\AppData\Roaming\required.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2580
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3C07.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2712
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2064
  - - C:\Users\Admin\AppData\Roaming\required.exe
      "C:\Users\Admin\AppData\Roaming\required.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:2556

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 Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp3C07.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3C07.tmp.bat
Size 152B
SHA256 08e9614ea8610f17d9a2dceef0023a9adb71fc1700990471f346379cc2bddd29
MD5 6926a69c940e8b0bbe0cfc66f9c15228
SHA1 96f55e0ea63b0a2cbcc4339f9706a2007224a099
SHA512 6a2f5f29b9102eb2fe42015960e14a1d85edacc5ef7e2ec14af014f44e498b3a148d3595304889293fed49cca811143f6e936897ad0af4f567d3b16055cdebad
MD5 SHA1 SHA512

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required.exe

Path \Users\Admin\AppData\Roaming\required.exe
Size 48KB
SHA256 e57f42b4a9e3305785a2a6e1ffb14fa82d90d5094e8e5ecb3cd8fcb903637d92
MD5 403e30df6166df14523e6f820703241a
SHA1 9f00e1baf4313fd33a513251b494d2340e88a91b
SHA512 885dfaf6fd4c14dcfa223a7a8cb3258b4c81da589eacb5d2da5d4ffbeb594ec2c9483ab1d75fc7a9b6cd1567cf82f94ded18ace4e14540f2f48033eed2f16a44
SSDEEP 768:qu4f9TskvpDWUPlNxmo2qbebAN6JunAjZPIBj8wucDO30b9IxgaOMtV+rhG/BDZ3:qu4f9Tswb2FbNuA6BGgb9I6aH3+4Jdm2
MD5 SHA1 SHA512 SSDEEP

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memory/2556-16-0x0000000000AD0000-0x0000000000AE2000-memory.dmp

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memory/2740-0-0x000000007421E000-0x000000007421F000-memory.dmp

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memory/2740-1-0x0000000000010000-0x0000000000022000-memory.dmp

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memory/2740-2-0x0000000074210000-0x00000000748FE000-memory.dmp

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memory/2740-11-0x0000000074210000-0x00000000748FE000-memory.dmp

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