asyncrat | 56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278

Analysis

max time kernel
148s
max time network
155s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08-08-2024 01:16

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General

Target

56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.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/0x0007000000018702-12.dat	family_xworm
behavioral1/memory/2280-13-0x0000000000A90000-0x0000000000AA0000-memory.dmp	family_xworm
behavioral1/memory/1196-47-0x0000000000EF0000-0x0000000000F00000-memory.dmp	family_xworm
behavioral1/memory/1636-51-0x00000000001D0000-0x00000000001E0000-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/0x00070000000120fe-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
2832	powershell.exe
868	powershell.exe
2028	powershell.exe
2064	powershell.exe

Executes dropped EXE 5 IoCs

pid	Process
2388	AsyncClient2.exe
2280	conhost.exe
1196	svchost.exe
296	svchost.exe
1636	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
2756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2832	powershell.exe
868	powershell.exe
2028	powershell.exe
2064	powershell.exe
2280	conhost.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	conhost.exe
Token: SeDebugPrivilege	2832	powershell.exe
Token: SeDebugPrivilege	868	powershell.exe
Token: SeDebugPrivilege	2388	AsyncClient2.exe
Token: SeDebugPrivilege	2388	AsyncClient2.exe
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	2064	powershell.exe
Token: SeDebugPrivilege	1196	svchost.exe
Token: SeDebugPrivilege	296	svchost.exe
Token: SeDebugPrivilege	1636	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2280	conhost.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2388	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	30
PID 2208 wrote to memory of 2388	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	30
PID 2208 wrote to memory of 2388	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	30
PID 2208 wrote to memory of 2388	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	30
PID 2208 wrote to memory of 2280	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	31
PID 2208 wrote to memory of 2280	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	31
PID 2208 wrote to memory of 2280	2208	56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe	31
PID 2280 wrote to memory of 2832	2280	conhost.exe	32
PID 2280 wrote to memory of 2832	2280	conhost.exe	32
PID 2280 wrote to memory of 2832	2280	conhost.exe	32
PID 2280 wrote to memory of 868	2280	conhost.exe	34
PID 2280 wrote to memory of 868	2280	conhost.exe	34
PID 2280 wrote to memory of 868	2280	conhost.exe	34
PID 2280 wrote to memory of 2028	2280	conhost.exe	37
PID 2280 wrote to memory of 2028	2280	conhost.exe	37
PID 2280 wrote to memory of 2028	2280	conhost.exe	37
PID 2280 wrote to memory of 2064	2280	conhost.exe	39
PID 2280 wrote to memory of 2064	2280	conhost.exe	39
PID 2280 wrote to memory of 2064	2280	conhost.exe	39
PID 2280 wrote to memory of 2756	2280	conhost.exe	41
PID 2280 wrote to memory of 2756	2280	conhost.exe	41
PID 2280 wrote to memory of 2756	2280	conhost.exe	41
PID 1208 wrote to memory of 1196	1208	taskeng.exe	44
PID 1208 wrote to memory of 1196	1208	taskeng.exe	44
PID 1208 wrote to memory of 1196	1208	taskeng.exe	44
PID 1208 wrote to memory of 296	1208	taskeng.exe	45
PID 1208 wrote to memory of 296	1208	taskeng.exe	45
PID 1208 wrote to memory of 296	1208	taskeng.exe	45
PID 1208 wrote to memory of 1636	1208	taskeng.exe	46
PID 1208 wrote to memory of 1636	1208	taskeng.exe	46
PID 1208 wrote to memory of 1636	1208	taskeng.exe	46

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\56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe
"C:\Users\Admin\AppData\Local\Temp\56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2208
- 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:2388
- 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:2280
- - 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:2832
- - 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:868
- - 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:2028
- - 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:2064
- - 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:2756

C:\Windows\system32\taskeng.exe
taskeng.exe {7BB156B7-C0D8-4F30-915E-2FF4FEBDD4E5} S-1-5-21-2257386474-3982792636-3902186748-1000:CTBHAMHL\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1196
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:296
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1636

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\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
35118c970ec305f8cd9ac662705fa2a9

SHA1
41d0e2778196325dafa16a95fa206a49688867d2

SHA256
a842e45975d29e1f4a821592c436966449c2472c2ba6b1c238a9e533a3e6ae60

SHA512
e760f3dc4f7f8b440e0db9f50e3e1d8452f5480e50c445c7e04b9441cb0134b97002eac594792212ee133ef65f6296ad8a1c130ad4310a681d3ec75a03b981df

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

Filesize
38KB

MD5
4c8f94ebfbc432a1cceb1b9d482ed339

SHA1
a7f2f1bfcbc3588a7fa6cf2aed8f2e070e771ab4

SHA256
37af26ecde5f39f377ccbc8823ed773e4b70341569ae671ab82f4571af524bed

SHA512
fcadd0c00db8159fe2752039c673188c2d8ab0f1a7161cc410be83aa1ec67b3eee877486ab05950c27716d249715ca3c0f9d47a5a4e4753835d3a6478a8b540e

Download Submit
memory/868-27-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/868-28-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/1196-47-0x0000000000EF0000-0x0000000000F00000-memory.dmp

Filesize
64KB

Download
memory/1636-51-0x00000000001D0000-0x00000000001E0000-memory.dmp

Filesize
64KB

Download
memory/2028-34-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/2028-35-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download
memory/2208-1-0x0000000000BB0000-0x0000000000BCE000-memory.dmp

Filesize
120KB

Download
memory/2208-0-0x000007FEF57D3000-0x000007FEF57D4000-memory.dmp

Filesize
4KB

Download
memory/2280-13-0x0000000000A90000-0x0000000000AA0000-memory.dmp

Filesize
64KB

Download
memory/2280-43-0x000007FEF57D0000-0x000007FEF61BC000-memory.dmp

Filesize
9.9MB

Download
memory/2280-15-0x000007FEF57D0000-0x000007FEF61BC000-memory.dmp

Filesize
9.9MB

Download
memory/2388-14-0x0000000000B90000-0x0000000000BA2000-memory.dmp

Filesize
72KB

Download
memory/2832-21-0x00000000022D0000-0x00000000022D8000-memory.dmp

Filesize
32KB

Download
memory/2832-20-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download