asyncrat | cc16889abbfe38386a105e602d856c512a2dfd51795ad55092ab27983e70b3b5

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/01/2025, 04:36

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General

Target
MoonStealer-main/MoonStealer_assets/upx/updater.exe
Size 48KB
Sample250131-e8bm8a1jar
SHA256 e57f42b4a9e3305785a2a6e1ffb14fa82d90d5094e8e5ecb3cd8fcb903637d92
MD5 403e30df6166df14523e6f820703241a
SHA1 9f00e1baf4313fd33a513251b494d2340e88a91b
SHA512 885dfaf6fd4c14dcfa223a7a8cb3258b4c81da589eacb5d2da5d4ffbeb594ec2c9483ab1d75fc7a9b6cd1567cf82f94ded18ace4e14540f2f48033eed2f16a44
SSDEEP 768:qu4f9TskvpDWUPlNxmo2qbebAN6JunAjZPIBj8wucDO30b9IxgaOMtV+rhG/BDZ3:qu4f9Tswb2FbNuA6BGgb9I6aH3+4Jdm2
MD5 SHA1 SHA512 SSDEEP

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
behavioral1/files/0x000a00000001202a-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2832	required.exe

Loads dropped DLL 1 IoCs

pid	Process
352	cmd.exe

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 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
2296	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
1972	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2528	updater.exe
2528	updater.exe
2528	updater.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2528	updater.exe
Token: SeDebugPrivilege	2832	required.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2536	2528	updater.exe	30
PID 2528 wrote to memory of 2536	2528	updater.exe	30
PID 2528 wrote to memory of 2536	2528	updater.exe	30
PID 2528 wrote to memory of 2536	2528	updater.exe	30
PID 2528 wrote to memory of 352	2528	updater.exe	32
PID 2528 wrote to memory of 352	2528	updater.exe	32
PID 2528 wrote to memory of 352	2528	updater.exe	32
PID 2528 wrote to memory of 352	2528	updater.exe	32
PID 352 wrote to memory of 2296	352	cmd.exe	34
PID 352 wrote to memory of 2296	352	cmd.exe	34
PID 352 wrote to memory of 2296	352	cmd.exe	34
PID 352 wrote to memory of 2296	352	cmd.exe	34
PID 2536 wrote to memory of 1972	2536	cmd.exe	35
PID 2536 wrote to memory of 1972	2536	cmd.exe	35
PID 2536 wrote to memory of 1972	2536	cmd.exe	35
PID 2536 wrote to memory of 1972	2536	cmd.exe	35
PID 352 wrote to memory of 2832	352	cmd.exe	36
PID 352 wrote to memory of 2832	352	cmd.exe	36
PID 352 wrote to memory of 2832	352	cmd.exe	36
PID 352 wrote to memory of 2832	352	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\MoonStealer-main\MoonStealer_assets\upx\updater.exe
"C:\Users\Admin\AppData\Local\Temp\MoonStealer-main\MoonStealer_assets\upx\updater.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2528
- 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
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2536
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "required" /tr '"C:\Users\Admin\AppData\Roaming\required.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1972
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB02D.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:352
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2296
- - C:\Users\Admin\AppData\Roaming\required.exe
    "C:\Users\Admin\AppData\Roaming\required.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2832

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

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Downloads

tmpB02D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpB02D.tmp.bat
Size 152B
SHA256 99606db566e82b7c42b5e85a1f6773cf4b96f5123149545de2084005cac46290
MD5 8df775ae331db03a95d60e8fddc7d893
SHA1 7369a59befa531966e3c86dd7f44d17dc8aa9cf3
SHA512 9db7f10ad3a5f1e49ed4f3c24a25d8f43e44493514f4688bd7338fe96b098ed3521d225a3f10d3b1f9b3d87e44bca573926089fa882acf3d5715989107d0de84
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/2528-0-0x00000000741AE000-0x00000000741AF000-memory.dmp

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memory/2528-1-0x0000000000F80000-0x0000000000F92000-memory.dmp

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memory/2528-2-0x00000000741A0000-0x000000007488E000-memory.dmp

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memory/2528-12-0x00000000741A0000-0x000000007488E000-memory.dmp

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memory/2832-16-0x0000000001030000-0x0000000001042000-memory.dmp

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