asyncrat | 72cd6d490f03122c90b4a52c8bc7fb5b938123eaf4926b5cc5cee14f44bef3cf

Analysis

max time kernel
145s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-12-2024 13:11

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General

Target

rrats.exe
Size

494KB
MD5

a2bdb024c98b7e8d3d06fc86e110d204
SHA1

2442360d37bf7e60b0d20c447bf5a0b51635a1d4
SHA256

72cd6d490f03122c90b4a52c8bc7fb5b938123eaf4926b5cc5cee14f44bef3cf
SHA512

b60afa45e29ddee3e3dc0d7e61bd5b9f3fb1d0c03a0655ab8f6c80b1fc5d6ff51f1b07a1af7ab1ce28d373f990d830f2f1c6e3c0e1efbaa280361a250ecb6850
SSDEEP

6144:rTouKrWBEu3/Z2lpGDHU3ykJVX+tLC/Jm808PYfz1b8s4GYAMwX:rToPWBv/cpGrU3yUX+tLGA8mJbV2o

Score

10^/10

asyncrat discord h discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

true

Botnet

Discord H

Mutex

RRAT_nMo7Zfs0N

Attributes

delay
3
install
false
install_file
powershell Add-MpPreference -ExclusionPath C:\
install_folder
Explorer.exe
pastebin_config
http://pastebin.com/raw/KKpnJShN

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/0x0008000000023c8a-14.dat	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1720	powershell.exe

Checks computer location settings 2 TTPs 4 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	rrat.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Explorer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	rrats.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	a.exe

Executes dropped EXE 3 IoCs

pid	Process
3840	a.exe
628	rrat.exe
3888	Explorer.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
18	pastebin.com
16	pastebin.com

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 15 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	rrat.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	rrats.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a.exe
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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Explorer.exe
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	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1532	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1568	schtasks.exe
1552	schtasks.exe
2872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1720	powershell.exe
1720	powershell.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe
628	rrat.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	powershell.exe
Token: SeDebugPrivilege	628	rrat.exe
Token: SeDebugPrivilege	3888	Explorer.exe
Token: SeDebugPrivilege	3888	Explorer.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 720	2040	rrats.exe	83
PID 2040 wrote to memory of 720	2040	rrats.exe	83
PID 2040 wrote to memory of 720	2040	rrats.exe	83
PID 720 wrote to memory of 3840	720	cmd.exe	86
PID 720 wrote to memory of 3840	720	cmd.exe	86
PID 720 wrote to memory of 3840	720	cmd.exe	86
PID 3840 wrote to memory of 628	3840	a.exe	87
PID 3840 wrote to memory of 628	3840	a.exe	87
PID 3840 wrote to memory of 628	3840	a.exe	87
PID 628 wrote to memory of 3932	628	rrat.exe	88
PID 628 wrote to memory of 3932	628	rrat.exe	88
PID 628 wrote to memory of 3932	628	rrat.exe	88
PID 3932 wrote to memory of 1720	3932	cmd.exe	90
PID 3932 wrote to memory of 1720	3932	cmd.exe	90
PID 3932 wrote to memory of 1720	3932	cmd.exe	90
PID 628 wrote to memory of 4736	628	rrat.exe	91
PID 628 wrote to memory of 4736	628	rrat.exe	91
PID 628 wrote to memory of 4736	628	rrat.exe	91
PID 628 wrote to memory of 4856	628	rrat.exe	93
PID 628 wrote to memory of 4856	628	rrat.exe	93
PID 628 wrote to memory of 4856	628	rrat.exe	93
PID 4736 wrote to memory of 1552	4736	cmd.exe	95
PID 4736 wrote to memory of 1552	4736	cmd.exe	95
PID 4736 wrote to memory of 1552	4736	cmd.exe	95
PID 4856 wrote to memory of 1532	4856	cmd.exe	96
PID 4856 wrote to memory of 1532	4856	cmd.exe	96
PID 4856 wrote to memory of 1532	4856	cmd.exe	96
PID 4856 wrote to memory of 3888	4856	cmd.exe	97
PID 4856 wrote to memory of 3888	4856	cmd.exe	97
PID 4856 wrote to memory of 3888	4856	cmd.exe	97
PID 3888 wrote to memory of 456	3888	Explorer.exe	104
PID 3888 wrote to memory of 456	3888	Explorer.exe	104
PID 3888 wrote to memory of 456	3888	Explorer.exe	104
PID 3888 wrote to memory of 4996	3888	Explorer.exe	106
PID 3888 wrote to memory of 4996	3888	Explorer.exe	106
PID 3888 wrote to memory of 4996	3888	Explorer.exe	106
PID 456 wrote to memory of 1568	456	cmd.exe	108
PID 456 wrote to memory of 1568	456	cmd.exe	108
PID 456 wrote to memory of 1568	456	cmd.exe	108
PID 4996 wrote to memory of 2872	4996	cmd.exe	109
PID 4996 wrote to memory of 2872	4996	cmd.exe	109
PID 4996 wrote to memory of 2872	4996	cmd.exe	109

C:\Users\Admin\AppData\Local\Temp\rrats.exe
"C:\Users\Admin\AppData\Local\Temp\rrats.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\a.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:720
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\a.exe
    a.exe -p1234
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3840
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\rrat.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\rrat.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:628
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c powershell Add-MpPreference -ExclusionPath C:\
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3932
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell Add-MpPreference -ExclusionPath C:\
        6⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1720
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows\WindowsUpdater" /tr '"C:\Users\Admin\AppData\Roaming\Explorer.exe"' & exit
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4736
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "Windows\WindowsUpdater" /tr '"C:\Users\Admin\AppData\Roaming\Explorer.exe"'
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1552
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE1D4.tmp.bat""
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4856
      - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        6⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:1532
      - C:\Users\Admin\AppData\Roaming\Explorer.exe
        
        "C:\Users\Admin\AppData\Roaming\Explorer.exe"
        6⤵
        Checks computer location settings
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3888
        
        C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /Cschtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdate" /tr "C:\Users\Admin\AppData\Local\explore.exe"
        7⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:456
        
        C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdate" /tr "C:\Users\Admin\AppData\Local\explore.exe"
        8⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1568
        
        C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /Cschtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdaters" /tr "cmd.exe /C powershell Add-MpPreference -ExclusionPath C:\"
        7⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4996
        
        C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdaters" /tr "cmd.exe /C powershell Add-MpPreference -ExclusionPath C:\"
        8⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\a.bat

Filesize
18B

MD5
cc1bfa4d25dc0d101cfe0a22852e9f00

SHA1
51c0172ac90f74fa675d96f326c2df8e85cc35ff

SHA256
3276f0ce57358545885aa30b873fa4b604a94689b7528a174d8c9e819873fb08

SHA512
d376d38607b12ffe2edafedf4a0c1932c88fe9db4e0a247d5104140d8da311a3b752c0d9a52e6048e3247d13efb3224218f56d276b22f2f26663e05334de81ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\a.exe

Filesize
301KB

MD5
7107f3fb53f9f3eaf3b95fd857f7aee9

SHA1
81e0dfe67b3b098c331eb3964e670e7762749b40

SHA256
3d74cbfd24a606b7f8c1e980cb08365c3127bed66b813f6fc7fb53eb19171cc0

SHA512
cd42e3d36a1f0bf7f0429df7ee0780d1d7039f0139f91e0cb71a488c8d50973df53fe70a7cdb09e50e5651e2c1a7fef3da0a4cb1e9225c5071711bd2d9f2e5d8

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX1\rrat.exe

Filesize
66KB

MD5
3d91c31a52be4e262f7f18272294ed99

SHA1
7c120a607650348fc4dfcdacdc77bf5885a9e6ac

SHA256
b99b28b82c9da1b009898da323d4793dde7828efcf777a56a835d54cbfec849d

SHA512
d17cc9db4d263addd524baa7b67974b2d4f0b904f46367cd6138805cd65a8364ea700a9df147dbb6dac8b1e7288a87fe24c497e1b1825f49b576e101789856d1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ldrxae3k.bku.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE1D4.tmp.bat

Filesize
152B

MD5
8d00c2c58facd176a8f47ae4c1812d31

SHA1
4d1fa0d1576d33ddba2dabad6dfe8fd16be3926c

SHA256
f5aea63336a66e5e3961dae937cfb91eabf470df7cf85f008fb22089fdd7d643

SHA512
d047871125abe138490b633c0bee59bf256c9a95738d0773c1385abdba1ca5422b17572d9a12aac20fdb59cdc8e201200a719bc4bdcb25103ee46d514880b4ed

Download Submit
memory/628-22-0x0000000000430000-0x0000000000446000-memory.dmp

Filesize
88KB

Download
memory/628-60-0x0000000005510000-0x00000000055AC000-memory.dmp

Filesize
624KB

Download
memory/1720-40-0x0000000007580000-0x00000000075B2000-memory.dmp

Filesize
200KB

Download
memory/1720-53-0x0000000007D00000-0x000000000837A000-memory.dmp

Filesize
6.5MB

Download
memory/1720-27-0x0000000005D60000-0x0000000005DC6000-memory.dmp

Filesize
408KB

Download
memory/1720-37-0x0000000005DD0000-0x0000000006124000-memory.dmp

Filesize
3.3MB

Download
memory/1720-38-0x0000000006390000-0x00000000063AE000-memory.dmp

Filesize
120KB

Download
memory/1720-39-0x00000000063D0000-0x000000000641C000-memory.dmp

Filesize
304KB

Download
memory/1720-41-0x000000006F230000-0x000000006F27C000-memory.dmp

Filesize
304KB

Download
memory/1720-25-0x00000000053E0000-0x0000000005402000-memory.dmp

Filesize
136KB

Download
memory/1720-51-0x0000000006970000-0x000000000698E000-memory.dmp

Filesize
120KB

Download
memory/1720-52-0x00000000075C0000-0x0000000007663000-memory.dmp

Filesize
652KB

Download
memory/1720-54-0x00000000076C0000-0x00000000076DA000-memory.dmp

Filesize
104KB

Download
memory/1720-26-0x0000000005C80000-0x0000000005CE6000-memory.dmp

Filesize
408KB

Download
memory/1720-55-0x0000000007730000-0x000000000773A000-memory.dmp

Filesize
40KB

Download
memory/1720-56-0x0000000007940000-0x00000000079D6000-memory.dmp

Filesize
600KB

Download
memory/1720-57-0x00000000078C0000-0x00000000078D1000-memory.dmp

Filesize
68KB

Download
memory/1720-58-0x00000000078F0000-0x00000000078FE000-memory.dmp

Filesize
56KB

Download
memory/1720-59-0x0000000007900000-0x0000000007914000-memory.dmp

Filesize
80KB

Download
memory/1720-24-0x00000000054E0000-0x0000000005B08000-memory.dmp

Filesize
6.2MB

Download
memory/1720-61-0x0000000007A00000-0x0000000007A1A000-memory.dmp

Filesize
104KB

Download
memory/1720-66-0x00000000079E0000-0x00000000079E8000-memory.dmp

Filesize
32KB

Download
memory/1720-23-0x0000000002A70000-0x0000000002AA6000-memory.dmp

Filesize
216KB

Download