asyncrat | 72cd6d490f03122c90b4a52c8bc7fb5b938123eaf4926b5cc5cee14f44bef3cf

Analysis

max time kernel
145s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
behavioral1/files/0x0008000000016cc5-24.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
2728	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
2196	a.exe
2868	rrat.exe
2884	Explorer.exe

Loads dropped DLL 6 IoCs

pid	Process
2088	cmd.exe
2196	a.exe
2196	a.exe
2196	a.exe
2196	a.exe
3036	cmd.exe

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

Web Service

T1102

flow	ioc
6	pastebin.com
4	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	a.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	rrats.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	rrat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1712	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
2392	schtasks.exe
1604	schtasks.exe
2584	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2728	powershell.exe
2868	rrat.exe
2868	rrat.exe
2868	rrat.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeDebugPrivilege	2868	rrat.exe
Token: SeDebugPrivilege	2884	Explorer.exe
Token: SeDebugPrivilege	2884	Explorer.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 2148 wrote to memory of 2088	2148	rrats.exe	30
PID 2148 wrote to memory of 2088	2148	rrats.exe	30
PID 2148 wrote to memory of 2088	2148	rrats.exe	30
PID 2148 wrote to memory of 2088	2148	rrats.exe	30
PID 2088 wrote to memory of 2196	2088	cmd.exe	32
PID 2088 wrote to memory of 2196	2088	cmd.exe	32
PID 2088 wrote to memory of 2196	2088	cmd.exe	32
PID 2088 wrote to memory of 2196	2088	cmd.exe	32
PID 2196 wrote to memory of 2868	2196	a.exe	33
PID 2196 wrote to memory of 2868	2196	a.exe	33
PID 2196 wrote to memory of 2868	2196	a.exe	33
PID 2196 wrote to memory of 2868	2196	a.exe	33
PID 2868 wrote to memory of 1632	2868	rrat.exe	34
PID 2868 wrote to memory of 1632	2868	rrat.exe	34
PID 2868 wrote to memory of 1632	2868	rrat.exe	34
PID 2868 wrote to memory of 1632	2868	rrat.exe	34
PID 1632 wrote to memory of 2728	1632	cmd.exe	36
PID 1632 wrote to memory of 2728	1632	cmd.exe	36
PID 1632 wrote to memory of 2728	1632	cmd.exe	36
PID 1632 wrote to memory of 2728	1632	cmd.exe	36
PID 2868 wrote to memory of 2592	2868	rrat.exe	38
PID 2868 wrote to memory of 2592	2868	rrat.exe	38
PID 2868 wrote to memory of 2592	2868	rrat.exe	38
PID 2868 wrote to memory of 2592	2868	rrat.exe	38
PID 2868 wrote to memory of 3036	2868	rrat.exe	40
PID 2868 wrote to memory of 3036	2868	rrat.exe	40
PID 2868 wrote to memory of 3036	2868	rrat.exe	40
PID 2868 wrote to memory of 3036	2868	rrat.exe	40
PID 2592 wrote to memory of 2392	2592	cmd.exe	42
PID 2592 wrote to memory of 2392	2592	cmd.exe	42
PID 2592 wrote to memory of 2392	2592	cmd.exe	42
PID 2592 wrote to memory of 2392	2592	cmd.exe	42
PID 3036 wrote to memory of 1712	3036	cmd.exe	43
PID 3036 wrote to memory of 1712	3036	cmd.exe	43
PID 3036 wrote to memory of 1712	3036	cmd.exe	43
PID 3036 wrote to memory of 1712	3036	cmd.exe	43
PID 3036 wrote to memory of 2884	3036	cmd.exe	44
PID 3036 wrote to memory of 2884	3036	cmd.exe	44
PID 3036 wrote to memory of 2884	3036	cmd.exe	44
PID 3036 wrote to memory of 2884	3036	cmd.exe	44
PID 2884 wrote to memory of 2312	2884	Explorer.exe	45
PID 2884 wrote to memory of 2312	2884	Explorer.exe	45
PID 2884 wrote to memory of 2312	2884	Explorer.exe	45
PID 2884 wrote to memory of 2312	2884	Explorer.exe	45
PID 2884 wrote to memory of 1756	2884	Explorer.exe	46
PID 2884 wrote to memory of 1756	2884	Explorer.exe	46
PID 2884 wrote to memory of 1756	2884	Explorer.exe	46
PID 2884 wrote to memory of 1756	2884	Explorer.exe	46
PID 1756 wrote to memory of 1604	1756	cmd.exe	49
PID 1756 wrote to memory of 1604	1756	cmd.exe	49
PID 1756 wrote to memory of 1604	1756	cmd.exe	49
PID 1756 wrote to memory of 1604	1756	cmd.exe	49
PID 2312 wrote to memory of 2584	2312	cmd.exe	50
PID 2312 wrote to memory of 2584	2312	cmd.exe	50
PID 2312 wrote to memory of 2584	2312	cmd.exe	50
PID 2312 wrote to memory of 2584	2312	cmd.exe	50

C:\Users\Admin\AppData\Local\Temp\rrats.exe
"C:\Users\Admin\AppData\Local\Temp\rrats.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\a.bat" "
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2088
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\a.exe
    a.exe -p1234
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2196
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\rrat.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\rrat.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2868
    - - 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:1632
      - 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:2728
    - - 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:2592
      - 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:2392
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD3B3.tmp.bat""
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3036
      - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        6⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:1712
      - C:\Users\Admin\AppData\Roaming\Explorer.exe
        
        "C:\Users\Admin\AppData\Roaming\Explorer.exe"
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2884
        
        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:2312
        
        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:2584
        
        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:1756
        
        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:1604

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

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\tmpD3B3.tmp.bat

Filesize
152B

MD5
494601830fcafd15d948b84f1da3b3a4

SHA1
e03575811198b7f2eca58037344da604b96a0999

SHA256
96104011d2a2ac7539848067b7554e799c3cb8a2082e178a2238dd75a4f2c84c

SHA512
9d9d7e5543d39788d899a91494536685e06ea90d10fdb1c9be4731c2d8c4a15a7edd7899c75f2e8d9f8ffec99e3bb5bef4471ff31dd36f2a086edb669a02fb2c

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

Filesize
66KB

MD5
3d91c31a52be4e262f7f18272294ed99

SHA1
7c120a607650348fc4dfcdacdc77bf5885a9e6ac

SHA256
b99b28b82c9da1b009898da323d4793dde7828efcf777a56a835d54cbfec849d

SHA512
d17cc9db4d263addd524baa7b67974b2d4f0b904f46367cd6138805cd65a8364ea700a9df147dbb6dac8b1e7288a87fe24c497e1b1825f49b576e101789856d1

Download Submit
memory/2868-37-0x0000000001380000-0x0000000001396000-memory.dmp

Filesize
88KB

Download
memory/2884-52-0x0000000001360000-0x0000000001376000-memory.dmp

Filesize
88KB

Download