xworm | f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8

Analysis

max time kernel
597s
max time network
589s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
05/06/2024, 16:53

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General

Target

XClient.exe
Size

43KB
MD5

9a6ce16635ceb90281c16062ae68a06c
SHA1

319ee0e49c3a23cf6afa7cb34d358247b6fbc89e
SHA256

f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8
SHA512

ec1e632a6efc0c8aa20386c3925a3b3a2941a33992d788de6d5a777a10c267e073b57d8a95af3d00684b0c4c33efb060f1d126c95179de731a19c71da36eb589
SSDEEP

768:ZY8ErOTKMYpyyNRyjymZ49pnWwFFEPh9Cf66FOChtk2lHxfgm:6/OUTc6Fw9y66FOCIwRt

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

lunassworld-50930.portmap.host:5508

Mutex

tBgRQhKX6pJuMKdy

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 9 IoCs

resource	yara_rule
behavioral2/memory/2416-1-0x00000000000A0000-0x00000000000B2000-memory.dmp	family_xworm
behavioral2/files/0x001b00000000558a-28.dat	family_xworm
behavioral2/memory/1644-33-0x00000000000B0000-0x00000000000C2000-memory.dmp	family_xworm
behavioral2/memory/1284-37-0x0000000000C00000-0x0000000000C12000-memory.dmp	family_xworm
behavioral2/memory/1744-40-0x00000000012C0000-0x00000000012D2000-memory.dmp	family_xworm
behavioral2/memory/2876-42-0x0000000000150000-0x0000000000162000-memory.dmp	family_xworm
behavioral2/memory/2768-44-0x0000000000090000-0x00000000000A2000-memory.dmp	family_xworm
behavioral2/memory/2232-46-0x0000000001150000-0x0000000001162000-memory.dmp	family_xworm
behavioral2/memory/2852-48-0x00000000012D0000-0x00000000012E2000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2712	powershell.exe
2824	powershell.exe
2468	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 10 IoCs

pid	Process
1644	XClient.exe
1284	XClient.exe
840	XClient.exe
1744	XClient.exe
2876	XClient.exe
2768	XClient.exe
2232	XClient.exe
2852	XClient.exe
360	XClient.exe
2404	XClient.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-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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
4	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2208	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2712	powershell.exe
2824	powershell.exe
2468	powershell.exe
2416	XClient.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

description	pid	Process
Token: SeDebugPrivilege	2416	XClient.exe
Token: SeDebugPrivilege	2712	powershell.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeDebugPrivilege	2468	powershell.exe
Token: SeDebugPrivilege	2416	XClient.exe
Token: SeDebugPrivilege	1644	XClient.exe
Token: SeDebugPrivilege	1284	XClient.exe
Token: SeDebugPrivilege	840	XClient.exe
Token: SeDebugPrivilege	1744	XClient.exe
Token: SeDebugPrivilege	2876	XClient.exe
Token: SeDebugPrivilege	2768	XClient.exe
Token: SeDebugPrivilege	2232	XClient.exe
Token: SeDebugPrivilege	2852	XClient.exe
Token: SeDebugPrivilege	360	XClient.exe
Token: SeDebugPrivilege	2404	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2416	XClient.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 2712	2416	XClient.exe	29
PID 2416 wrote to memory of 2712	2416	XClient.exe	29
PID 2416 wrote to memory of 2712	2416	XClient.exe	29
PID 2416 wrote to memory of 2824	2416	XClient.exe	31
PID 2416 wrote to memory of 2824	2416	XClient.exe	31
PID 2416 wrote to memory of 2824	2416	XClient.exe	31
PID 2416 wrote to memory of 2468	2416	XClient.exe	33
PID 2416 wrote to memory of 2468	2416	XClient.exe	33
PID 2416 wrote to memory of 2468	2416	XClient.exe	33
PID 2416 wrote to memory of 2208	2416	XClient.exe	35
PID 2416 wrote to memory of 2208	2416	XClient.exe	35
PID 2416 wrote to memory of 2208	2416	XClient.exe	35
PID 2636 wrote to memory of 1644	2636	taskeng.exe	38
PID 2636 wrote to memory of 1644	2636	taskeng.exe	38
PID 2636 wrote to memory of 1644	2636	taskeng.exe	38
PID 2636 wrote to memory of 1284	2636	taskeng.exe	41
PID 2636 wrote to memory of 1284	2636	taskeng.exe	41
PID 2636 wrote to memory of 1284	2636	taskeng.exe	41
PID 2636 wrote to memory of 840	2636	taskeng.exe	42
PID 2636 wrote to memory of 840	2636	taskeng.exe	42
PID 2636 wrote to memory of 840	2636	taskeng.exe	42
PID 2636 wrote to memory of 1744	2636	taskeng.exe	43
PID 2636 wrote to memory of 1744	2636	taskeng.exe	43
PID 2636 wrote to memory of 1744	2636	taskeng.exe	43
PID 2636 wrote to memory of 2876	2636	taskeng.exe	44
PID 2636 wrote to memory of 2876	2636	taskeng.exe	44
PID 2636 wrote to memory of 2876	2636	taskeng.exe	44
PID 2636 wrote to memory of 2768	2636	taskeng.exe	45
PID 2636 wrote to memory of 2768	2636	taskeng.exe	45
PID 2636 wrote to memory of 2768	2636	taskeng.exe	45
PID 2636 wrote to memory of 2232	2636	taskeng.exe	46
PID 2636 wrote to memory of 2232	2636	taskeng.exe	46
PID 2636 wrote to memory of 2232	2636	taskeng.exe	46
PID 2636 wrote to memory of 2852	2636	taskeng.exe	47
PID 2636 wrote to memory of 2852	2636	taskeng.exe	47
PID 2636 wrote to memory of 2852	2636	taskeng.exe	47
PID 2636 wrote to memory of 360	2636	taskeng.exe	48
PID 2636 wrote to memory of 360	2636	taskeng.exe	48
PID 2636 wrote to memory of 360	2636	taskeng.exe	48
PID 2636 wrote to memory of 2404	2636	taskeng.exe	49
PID 2636 wrote to memory of 2404	2636	taskeng.exe	49
PID 2636 wrote to memory of 2404	2636	taskeng.exe	49

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2416
- 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\Temp\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2712
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2824
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2468
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2208

C:\Windows\system32\taskeng.exe
taskeng.exe {F9B54A9E-2D16-4F1D-93EE-74F06E34D81E} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1644
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1284
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:840
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2876
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2768
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2232
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2852
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:360
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
235e86fb52ce884c64546e1b4dcd01d9

SHA1
29d53f7ee5ab02115569b1b9878ba3bd3965062d

SHA256
9c38e15346aaf87dde89022d5ad00eb700c33fcc81b35cd41ec151844ecbc40b

SHA512
183b1148f9063d52101ce4a5b610cf97efbcf2dfbe620c93ccc5851fa777c8668e1a6131fc722b49681e1eab0152662b5b2af27a0652a28666ebffb5a6455078

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

Filesize
43KB

MD5
9a6ce16635ceb90281c16062ae68a06c

SHA1
319ee0e49c3a23cf6afa7cb34d358247b6fbc89e

SHA256
f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8

SHA512
ec1e632a6efc0c8aa20386c3925a3b3a2941a33992d788de6d5a777a10c267e073b57d8a95af3d00684b0c4c33efb060f1d126c95179de731a19c71da36eb589

Download Submit
memory/1284-37-0x0000000000C00000-0x0000000000C12000-memory.dmp

Filesize
72KB

Download
memory/1644-33-0x00000000000B0000-0x00000000000C2000-memory.dmp

Filesize
72KB

Download
memory/1744-40-0x00000000012C0000-0x00000000012D2000-memory.dmp

Filesize
72KB

Download
memory/2232-46-0x0000000001150000-0x0000000001162000-memory.dmp

Filesize
72KB

Download
memory/2416-1-0x00000000000A0000-0x00000000000B2000-memory.dmp

Filesize
72KB

Download
memory/2416-2-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/2416-0-0x000007FEF5CE3000-0x000007FEF5CE4000-memory.dmp

Filesize
4KB

Download
memory/2416-34-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/2712-8-0x000000001B7E0000-0x000000001BAC2000-memory.dmp

Filesize
2.9MB

Download
memory/2712-9-0x0000000002410000-0x0000000002418000-memory.dmp

Filesize
32KB

Download
memory/2712-7-0x0000000001EA0000-0x0000000001F20000-memory.dmp

Filesize
512KB

Download
memory/2768-44-0x0000000000090000-0x00000000000A2000-memory.dmp

Filesize
72KB

Download
memory/2824-15-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/2824-16-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2852-48-0x00000000012D0000-0x00000000012E2000-memory.dmp

Filesize
72KB

Download
memory/2876-42-0x0000000000150000-0x0000000000162000-memory.dmp

Filesize
72KB

Download