asyncrat | 56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
07-08-2024 05:41

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General

Target

BED020CBBA2610B31AF66357DB97C10C.exe
Size

95KB
MD5

bed020cbba2610b31af66357db97c10c
SHA1

d4c68500e5f8125b60976af885172253a435cc78
SHA256

56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278
SHA512

08fb0c1fa421dbdd61aa57d2adc7127cf7def12e88db054515be18ec05207e6f93ad775316137267d77e987e0145439e293af4784eb9b17826d9cb39fdedd931
SSDEEP

1536:6GCx35SC0o7Yrcpv41Efir+XKEkRi/gN2ieJOW56+Cj5sVMH:6GO35SBrcpgSfPLkEybeJL56+CtYMH

Score

10^/10

asyncrat xworm default discovery execution rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

103.174.191.71:6606

103.174.191.71:7707

103.174.191.71:8808

Mutex

HFE2t0VQV50q

Attributes

delay
3
install
false
install_file
game.exe
install_folder
%AppData%

aes.plain

Extracted

Family

xworm

Version

5.0

testarosa.duckdns.org:7110

Mutex

H1C6pa3caMCcJ1BG

Attributes

Install_directory
%LocalAppData%
install_file
svchost.exe

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x00070000000186e9-12.dat	family_xworm
behavioral1/memory/2692-13-0x00000000011E0000-0x00000000011F0000-memory.dmp	family_xworm
behavioral1/memory/2496-64-0x00000000009D0000-0x00000000009E0000-memory.dmp	family_xworm
behavioral1/memory/2192-67-0x00000000001D0000-0x00000000001E0000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0009000000012116-6.dat	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2116	powershell.exe
2888	powershell.exe
332	powershell.exe
2672	powershell.exe

Executes dropped EXE 4 IoCs

pid	Process
2784	AsyncClient2.exe
2692	conhost.exe
2496	svchost.exe
2192	svchost.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 1 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	AsyncClient2.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
1232	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2672	powershell.exe
2116	powershell.exe
2888	powershell.exe
332	powershell.exe
2692	conhost.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	conhost.exe
Token: SeDebugPrivilege	2672	powershell.exe
Token: SeDebugPrivilege	2116	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2784	AsyncClient2.exe
Token: SeDebugPrivilege	2784	AsyncClient2.exe
Token: SeDebugPrivilege	332	powershell.exe
Token: SeDebugPrivilege	2496	svchost.exe
Token: SeDebugPrivilege	2192	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2692	conhost.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2784	2216	BED020CBBA2610B31AF66357DB97C10C.exe	30
PID 2216 wrote to memory of 2784	2216	BED020CBBA2610B31AF66357DB97C10C.exe	30
PID 2216 wrote to memory of 2784	2216	BED020CBBA2610B31AF66357DB97C10C.exe	30
PID 2216 wrote to memory of 2784	2216	BED020CBBA2610B31AF66357DB97C10C.exe	30
PID 2216 wrote to memory of 2692	2216	BED020CBBA2610B31AF66357DB97C10C.exe	31
PID 2216 wrote to memory of 2692	2216	BED020CBBA2610B31AF66357DB97C10C.exe	31
PID 2216 wrote to memory of 2692	2216	BED020CBBA2610B31AF66357DB97C10C.exe	31
PID 2692 wrote to memory of 2672	2692	conhost.exe	32
PID 2692 wrote to memory of 2672	2692	conhost.exe	32
PID 2692 wrote to memory of 2672	2692	conhost.exe	32
PID 2692 wrote to memory of 2116	2692	conhost.exe	34
PID 2692 wrote to memory of 2116	2692	conhost.exe	34
PID 2692 wrote to memory of 2116	2692	conhost.exe	34
PID 2692 wrote to memory of 2888	2692	conhost.exe	36
PID 2692 wrote to memory of 2888	2692	conhost.exe	36
PID 2692 wrote to memory of 2888	2692	conhost.exe	36
PID 2692 wrote to memory of 332	2692	conhost.exe	39
PID 2692 wrote to memory of 332	2692	conhost.exe	39
PID 2692 wrote to memory of 332	2692	conhost.exe	39
PID 2692 wrote to memory of 1232	2692	conhost.exe	41
PID 2692 wrote to memory of 1232	2692	conhost.exe	41
PID 2692 wrote to memory of 1232	2692	conhost.exe	41
PID 1372 wrote to memory of 2496	1372	taskeng.exe	44
PID 1372 wrote to memory of 2496	1372	taskeng.exe	44
PID 1372 wrote to memory of 2496	1372	taskeng.exe	44
PID 1372 wrote to memory of 2192	1372	taskeng.exe	45
PID 1372 wrote to memory of 2192	1372	taskeng.exe	45
PID 1372 wrote to memory of 2192	1372	taskeng.exe	45

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\BED020CBBA2610B31AF66357DB97C10C.exe
"C:\Users\Admin\AppData\Local\Temp\BED020CBBA2610B31AF66357DB97C10C.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Users\Admin\AppData\Roaming\AsyncClient2.exe
  "C:\Users\Admin\AppData\Roaming\AsyncClient2.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2784
- C:\Users\Admin\AppData\Roaming\conhost.exe
  "C:\Users\Admin\AppData\Roaming\conhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\conhost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2672
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2116
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2888
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:332
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\svchost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1232

C:\Windows\system32\taskeng.exe
taskeng.exe {8EBF03A3-B425-4A06-85FA-F8F6846EB031} S-1-5-21-3294248377-1418901787-4083263181-1000:FMEDFXFE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1372
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2496
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2192

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab5AE.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Roaming\AsyncClient2.exe

Filesize
47KB

MD5
a4a7054ac8b42e6b6f60cf3cfb91916c

SHA1
4c32f6e0052bd83bae5a0516291972fc653262ce

SHA256
6a7acd0370583f01bff43b579ad0d45f29eedf6f004e70c4b0e793f7ea6c0448

SHA512
6603572c46f0074857746e80d0d2a761312f7ccc5f55df6e1401f902a061d0375d298d23aabbfb93e02e19c655399e4916c4fcd6cd5da4dba661d6334277d11e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
f60999ad6974ee449026e6366da8179f

SHA1
3d3443a929cc5a9a6098824ff4b319b910217081

SHA256
579f3aaf77f501df59fa7b8b7e4eabbb01a430790381dd92e01fa28f8eb1edfd

SHA512
c0e51f271c7df00394f525cfe02338a8c70ec1c811b024fbf0d500502485220b50aa6511858ffab4dda63eb97fe5aa6291967cb51ddd1295ae8221481ae97319

Download Submit
C:\Users\Admin\AppData\Roaming\conhost.exe

Filesize
38KB

MD5
4c8f94ebfbc432a1cceb1b9d482ed339

SHA1
a7f2f1bfcbc3588a7fa6cf2aed8f2e070e771ab4

SHA256
37af26ecde5f39f377ccbc8823ed773e4b70341569ae671ab82f4571af524bed

SHA512
fcadd0c00db8159fe2752039c673188c2d8ab0f1a7161cc410be83aa1ec67b3eee877486ab05950c27716d249715ca3c0f9d47a5a4e4753835d3a6478a8b540e

Download Submit
memory/332-42-0x0000000002360000-0x0000000002368000-memory.dmp

Filesize
32KB

Download
memory/332-41-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2116-27-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2116-28-0x00000000029F0000-0x00000000029F8000-memory.dmp

Filesize
32KB

Download
memory/2192-67-0x00000000001D0000-0x00000000001E0000-memory.dmp

Filesize
64KB

Download
memory/2216-1-0x0000000001240000-0x000000000125E000-memory.dmp

Filesize
120KB

Download
memory/2216-0-0x000007FEF5013000-0x000007FEF5014000-memory.dmp

Filesize
4KB

Download
memory/2496-64-0x00000000009D0000-0x00000000009E0000-memory.dmp

Filesize
64KB

Download
memory/2672-21-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2672-20-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2692-15-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

Filesize
9.9MB

Download
memory/2692-13-0x00000000011E0000-0x00000000011F0000-memory.dmp

Filesize
64KB

Download
memory/2692-60-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

Filesize
9.9MB

Download
memory/2784-14-0x0000000001220000-0x0000000001232000-memory.dmp

Filesize
72KB

Download
memory/2888-34-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/2888-35-0x0000000000680000-0x0000000000688000-memory.dmp

Filesize
32KB

Download