asyncrat | 20e65c2d214ec536e42d4ce447afaa253b5cd9293fcd759e64023dd891dab6f2

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-12-2024 21:55

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General

Target

VixenPrivate.exe
Size

63KB
MD5

52d017d32bef7cffcb7ff98571736a97
SHA1

f0764f6bec89063594e5afcf2233d586da2fa999
SHA256

20e65c2d214ec536e42d4ce447afaa253b5cd9293fcd759e64023dd891dab6f2
SHA512

538ea5e3b6516b63fe803a6e158b00a286fa3016df24a25f59e6a9b1ff3b01ad7876aff3efb8d474cf410d22db7b745698be46f6ae1f11ae819590607a2b999f
SSDEEP

1536:SwXz4zflrUYJYUbBh9bFq7+MOGxuUdpqKmY7:SkUlbYUbBeFfGz

Score

10^/10

asyncrat xworm default execution rat trojan

Malware Config

Extracted

Family

asyncrat

Botnet

Default

100.37.20.232:4872

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Extracted

Family

xworm

100.37.20.232:4872

Attributes

Install_directory
%LocalAppData%
install_file
XClient.exe

Signatures

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

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x00030000000006db-29.dat	family_xworm
behavioral2/memory/4260-33-0x0000000000690000-0x00000000006A6000-memory.dmp	family_xworm

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

Checks computer location settings 2 TTPs 1 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	VixenPrivate.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4260	fhbxnp.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
49	ip-api.com

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Start PowerShell.

execution

PowerShell

T1059.001

pid	Process
1916	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe
2692	VixenPrivate.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	VixenPrivate.exe
Token: SeDebugPrivilege	1916	powershell.exe
Token: SeDebugPrivilege	4260	fhbxnp.exe
Token: SeDebugPrivilege	4260	fhbxnp.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4260	fhbxnp.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 2728	2692	VixenPrivate.exe	93
PID 2692 wrote to memory of 2728	2692	VixenPrivate.exe	93
PID 2728 wrote to memory of 1916	2728	cmd.exe	95
PID 2728 wrote to memory of 1916	2728	cmd.exe	95
PID 1916 wrote to memory of 4260	1916	powershell.exe	96
PID 1916 wrote to memory of 4260	1916	powershell.exe	96

C:\Users\Admin\AppData\Local\Temp\VixenPrivate.exe
"C:\Users\Admin\AppData\Local\Temp\VixenPrivate.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\fhbxnp.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\fhbxnp.exe"'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1916
  - - C:\Users\Admin\AppData\Local\Temp\fhbxnp.exe
      "C:\Users\Admin\AppData\Local\Temp\fhbxnp.exe"
      4⤵
      Drops startup file
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_40pjoahr.hj4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
66KB

MD5
84cc950a60b2e460687978967ed32191

SHA1
31cdcaacf713d244f6427bac4592626b3599c11c

SHA256
e4463cd0f170cafa992be4093500d4e1be51949bfaca981e414c91d16b600158

SHA512
3c7a2befd57516a2f196879555ab9ef451443205e1ef9de456de516754968c99ca01c2d53ffcf2fe9005cdc6616e881f160a351825a4202af6a443e3178fc854

Download Submit
memory/1916-16-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/1916-34-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/1916-28-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/1916-27-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/1916-26-0x000001D7F7F80000-0x000001D7F7FA2000-memory.dmp

Filesize
136KB

Download
memory/2692-7-0x00007FFA29163000-0x00007FFA29165000-memory.dmp

Filesize
8KB

Download
memory/2692-8-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/2692-11-0x0000000002180000-0x00000000021F6000-memory.dmp

Filesize
472KB

Download
memory/2692-12-0x0000000001C10000-0x0000000001C44000-memory.dmp

Filesize
208KB

Download
memory/2692-13-0x0000000002100000-0x000000000211E000-memory.dmp

Filesize
120KB

Download
memory/2692-14-0x0000000002140000-0x0000000002172000-memory.dmp

Filesize
200KB

Download
memory/2692-9-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/2692-10-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/2692-0-0x00007FFA29163000-0x00007FFA29165000-memory.dmp

Filesize
8KB

Download
memory/2692-6-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/2692-3-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/2692-2-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/2692-1-0x0000000000E90000-0x0000000000EA6000-memory.dmp

Filesize
88KB

Download
memory/4260-33-0x0000000000690000-0x00000000006A6000-memory.dmp

Filesize
88KB

Download