asyncrat | cc16889abbfe38386a105e602d856c512a2dfd51795ad55092ab27983e70b3b5

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-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
behavioral2/files/0x000f00000001e7ed-11.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-70482961-775596374-3727440602-1000\Control Panel\International\Geo\Nation	updater.exe

Executes dropped EXE 1 IoCs

pid	Process
1460	required.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	updater.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	required.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1584	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
4920	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe
228	updater.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	228	updater.exe
Token: SeDebugPrivilege	1460	required.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 1832	228	updater.exe	86
PID 228 wrote to memory of 1832	228	updater.exe	86
PID 228 wrote to memory of 1832	228	updater.exe	86
PID 228 wrote to memory of 3044	228	updater.exe	88
PID 228 wrote to memory of 3044	228	updater.exe	88
PID 228 wrote to memory of 3044	228	updater.exe	88
PID 3044 wrote to memory of 1584	3044	cmd.exe	90
PID 3044 wrote to memory of 1584	3044	cmd.exe	90
PID 3044 wrote to memory of 1584	3044	cmd.exe	90
PID 1832 wrote to memory of 4920	1832	cmd.exe	91
PID 1832 wrote to memory of 4920	1832	cmd.exe	91
PID 1832 wrote to memory of 4920	1832	cmd.exe	91
PID 3044 wrote to memory of 1460	3044	cmd.exe	92
PID 3044 wrote to memory of 1460	3044	cmd.exe	92
PID 3044 wrote to memory of 1460	3044	cmd.exe	92

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:228
- 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:1832
- - 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:4920
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp40D0.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1584
- - 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:1460

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

Query Registry

T1012

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

tmp40D0.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp40D0.tmp.bat
Size 152B
SHA256 b5379fd4a27b5cab9d8dc9e270944c4f3037b1f148efc2495e08848d7cde9ead
MD5 b5d4499c4ab21ccbb468a77365567fa5
SHA1 c04b0a9fdffbfb3b07115faea7478377f9b79406
SHA512 966714d52d6bfb62c977357a2d5963612c4c29130f69689cdb6261abfedcaed7506782702a8205ccd51e76a612cee4e9cbbf58681b69b534fbb2362b5a43cc2f
MD5 SHA1 SHA512

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required.exe

Path C:\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/228-0-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

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memory/228-1-0x0000000000F20000-0x0000000000F32000-memory.dmp

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memory/228-2-0x0000000074A90000-0x0000000075240000-memory.dmp

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memory/228-3-0x00000000058F0000-0x000000000598C000-memory.dmp

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memory/228-8-0x0000000074A90000-0x0000000075240000-memory.dmp

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memory/1460-13-0x0000000074A90000-0x0000000075240000-memory.dmp

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memory/1460-14-0x0000000074A90000-0x0000000075240000-memory.dmp

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