asyncrat | 56d98688e5aa501787a31e98f9666b80002bb692e793257bb3a6f6f9cace8278

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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 persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

testarosa.duckdns.org:7110

103.174.191.71:15320

Mutex

H1C6pa3caMCcJ1BG

Attributes

Install_directory
%LocalAppData%
install_file
svchost.exe

aes.plain

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

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
behavioral2/files/0x000800000002346e-16.dat	family_xworm
behavioral2/memory/4820-24-0x0000000000C10000-0x0000000000C20000-memory.dmp	family_xworm
behavioral2/files/0x0007000000023472-104.dat	family_xworm
behavioral2/memory/4400-108-0x0000000000C20000-0x0000000000C34000-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
behavioral2/files/0x0008000000023468-6.dat	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Start PowerShell.

execution

PowerShell

T1059.001

pid	Process
1088	powershell.exe
1904	powershell.exe
3228	powershell.exe
1116	powershell.exe
5104	powershell.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	BED020CBBA2610B31AF66357DB97C10C.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	conhost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	AsyncClient2.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti.lnk	rcmlyw.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti.lnk	rcmlyw.exe

Executes dropped EXE 5 IoCs

pid	Process
3600	AsyncClient2.exe
4820	conhost.exe
4400	rcmlyw.exe
2164	svchost.exe
644	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\anti = "C:\\Users\\Admin\\AppData\\Local\\Temp\\anti.exe"	rcmlyw.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 3 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
2720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1904	powershell.exe
1904	powershell.exe
3228	powershell.exe
3228	powershell.exe
1116	powershell.exe
1116	powershell.exe
5104	powershell.exe
5104	powershell.exe
4820	conhost.exe
1088	powershell.exe
1088	powershell.exe
3600	AsyncClient2.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	4820	conhost.exe
Token: SeDebugPrivilege	1904	powershell.exe
Token: SeDebugPrivilege	3228	powershell.exe
Token: SeDebugPrivilege	1116	powershell.exe
Token: SeDebugPrivilege	3600	AsyncClient2.exe
Token: SeDebugPrivilege	3600	AsyncClient2.exe
Token: SeDebugPrivilege	5104	powershell.exe
Token: SeDebugPrivilege	1088	powershell.exe
Token: SeDebugPrivilege	4400	rcmlyw.exe
Token: SeDebugPrivilege	2164	svchost.exe
Token: SeDebugPrivilege	644	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4820	conhost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 3600	4616	BED020CBBA2610B31AF66357DB97C10C.exe	83
PID 4616 wrote to memory of 3600	4616	BED020CBBA2610B31AF66357DB97C10C.exe	83
PID 4616 wrote to memory of 3600	4616	BED020CBBA2610B31AF66357DB97C10C.exe	83
PID 4616 wrote to memory of 4820	4616	BED020CBBA2610B31AF66357DB97C10C.exe	84
PID 4616 wrote to memory of 4820	4616	BED020CBBA2610B31AF66357DB97C10C.exe	84
PID 4820 wrote to memory of 1904	4820	conhost.exe	88
PID 4820 wrote to memory of 1904	4820	conhost.exe	88
PID 4820 wrote to memory of 3228	4820	conhost.exe	90
PID 4820 wrote to memory of 3228	4820	conhost.exe	90
PID 4820 wrote to memory of 1116	4820	conhost.exe	92
PID 4820 wrote to memory of 1116	4820	conhost.exe	92
PID 4820 wrote to memory of 5104	4820	conhost.exe	95
PID 4820 wrote to memory of 5104	4820	conhost.exe	95
PID 4820 wrote to memory of 2720	4820	conhost.exe	97
PID 4820 wrote to memory of 2720	4820	conhost.exe	97
PID 3600 wrote to memory of 5048	3600	AsyncClient2.exe	99
PID 3600 wrote to memory of 5048	3600	AsyncClient2.exe	99
PID 3600 wrote to memory of 5048	3600	AsyncClient2.exe	99
PID 5048 wrote to memory of 1088	5048	cmd.exe	101
PID 5048 wrote to memory of 1088	5048	cmd.exe	101
PID 5048 wrote to memory of 1088	5048	cmd.exe	101
PID 1088 wrote to memory of 4400	1088	powershell.exe	102
PID 1088 wrote to memory of 4400	1088	powershell.exe	102

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⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Users\Admin\AppData\Roaming\AsyncClient2.exe
  "C:\Users\Admin\AppData\Roaming\AsyncClient2.exe"
  2⤵
  - 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:3600
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\rcmlyw.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5048
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\rcmlyw.exe"'
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1088
    - - C:\Users\Admin\AppData\Local\Temp\rcmlyw.exe
        
        "C:\Users\Admin\AppData\Local\Temp\rcmlyw.exe"
        5⤵
        Drops startup file
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of AdjustPrivilegeToken
        
        PID:4400
- C:\Users\Admin\AppData\Roaming\conhost.exe
  "C:\Users\Admin\AppData\Roaming\conhost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4820
- - 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:1904
- - 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:3228
- - 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:1116
- - 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:5104
- - 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:2720

C:\Users\Admin\AppData\Local\svchost.exe
C:\Users\Admin\AppData\Local\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2164

C:\Users\Admin\AppData\Local\svchost.exe
C:\Users\Admin\AppData\Local\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:644

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
98baf5117c4fcec1692067d200c58ab3

SHA1
5b33a57b72141e7508b615e17fb621612cb8e390

SHA256
30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

SHA512
344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
a2c8179aaa149c0b9791b73ce44c04d1

SHA1
703361b0d43ec7f669304e7c0ffbbfdeb1e484ff

SHA256
c1d30342a40a2b6e7553da30ceb85754d33820f6fbb3bbbed1ceb30d6390de4a

SHA512
2e201dd457d055baad86f68c15bcc7beb48d6dc2ffc10db7f304eb93f697e7b45991cbde857d25da2c9c60c23f3e13df8b5ed5809c1753737a23096e296cc9e3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_g2lmggjw.e0i.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
49KB

MD5
cd86c2933636bea72d49595aeb34c33a

SHA1
5919319fb99ab578df62059cbe78a52174bab1c6

SHA256
489d1b618cf7c3d24ff0926bc53738a1496bede40806d42acac75f95fc949e71

SHA512
4944df3e13d1f7b10b2a6dcf538121e4b4a5108a0f3ae60687db35baba97029f817691487658b49e333becb6d77e07e635c978f4971b138872a3487f06dcc7a0

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\conhost.exe

Filesize
38KB

MD5
4c8f94ebfbc432a1cceb1b9d482ed339

SHA1
a7f2f1bfcbc3588a7fa6cf2aed8f2e070e771ab4

SHA256
37af26ecde5f39f377ccbc8823ed773e4b70341569ae671ab82f4571af524bed

SHA512
fcadd0c00db8159fe2752039c673188c2d8ab0f1a7161cc410be83aa1ec67b3eee877486ab05950c27716d249715ca3c0f9d47a5a4e4753835d3a6478a8b540e

Download Submit
memory/1088-99-0x0000000005F90000-0x0000000005FAE000-memory.dmp

Filesize
120KB

Download
memory/1088-103-0x00000000064C0000-0x00000000064E2000-memory.dmp

Filesize
136KB

Download
memory/1088-101-0x00000000071B0000-0x0000000007246000-memory.dmp

Filesize
600KB

Download
memory/1088-102-0x0000000006470000-0x000000000648A000-memory.dmp

Filesize
104KB

Download
memory/1088-100-0x0000000006040000-0x000000000608C000-memory.dmp

Filesize
304KB

Download
memory/1088-97-0x0000000005B30000-0x0000000005E84000-memory.dmp

Filesize
3.3MB

Download
memory/1088-92-0x00000000058B0000-0x0000000005916000-memory.dmp

Filesize
408KB

Download
memory/1088-86-0x0000000005810000-0x0000000005832000-memory.dmp

Filesize
136KB

Download
memory/1088-85-0x0000000005190000-0x00000000057B8000-memory.dmp

Filesize
6.2MB

Download
memory/1088-84-0x0000000002670000-0x00000000026A6000-memory.dmp

Filesize
216KB

Download
memory/1904-34-0x0000017D51A70000-0x0000017D51A92000-memory.dmp

Filesize
136KB

Download
memory/3600-64-0x0000000005430000-0x00000000054CC000-memory.dmp

Filesize
624KB

Download
memory/3600-81-0x00000000056A0000-0x00000000056AC000-memory.dmp

Filesize
48KB

Download
memory/3600-77-0x0000000005FC0000-0x0000000006564000-memory.dmp

Filesize
5.6MB

Download
memory/3600-27-0x0000000074BFE000-0x0000000074BFF000-memory.dmp

Filesize
4KB

Download
memory/3600-80-0x0000000006730000-0x00000000067A6000-memory.dmp

Filesize
472KB

Download
memory/3600-52-0x0000000004F70000-0x0000000004FD6000-memory.dmp

Filesize
408KB

Download
memory/3600-28-0x00000000005F0000-0x0000000000602000-memory.dmp

Filesize
72KB

Download
memory/3600-82-0x00000000066B0000-0x00000000066CE000-memory.dmp

Filesize
120KB

Download
memory/3600-114-0x0000000074BFE000-0x0000000074BFF000-memory.dmp

Filesize
4KB

Download
memory/4400-108-0x0000000000C20000-0x0000000000C34000-memory.dmp

Filesize
80KB

Download
memory/4616-0-0x00007FFBC2B93000-0x00007FFBC2B95000-memory.dmp

Filesize
8KB

Download
memory/4616-1-0x0000000000F10000-0x0000000000F2E000-memory.dmp

Filesize
120KB

Download
memory/4820-26-0x00007FFBC2B90000-0x00007FFBC3651000-memory.dmp

Filesize
10.8MB

Download
memory/4820-113-0x00007FFBC2B90000-0x00007FFBC3651000-memory.dmp

Filesize
10.8MB

Download
memory/4820-24-0x0000000000C10000-0x0000000000C20000-memory.dmp

Filesize
64KB

Download
memory/4820-115-0x000000001B7D0000-0x000000001B7E0000-memory.dmp

Filesize
64KB

Download
memory/4820-79-0x000000001B7D0000-0x000000001B7E0000-memory.dmp

Filesize
64KB

Download