xworm | 5d3f76dc4c4191ac7baa3ba130abdce26bef47962e7c33645e0a30dd6635eeab

Analysis

max time kernel
126s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-01-2025 20:42

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General

Target

fXWlfxf.exe
Size

270KB
MD5

b08e25b2e7527dd37baa4352cf143f81
SHA1

5da381243e460e32388f1f0f33988e98ff3cc38f
SHA256

5d3f76dc4c4191ac7baa3ba130abdce26bef47962e7c33645e0a30dd6635eeab
SHA512

2083a53f24c6061cfd6de5b486fe8794730ec964615e8e2dc009e1d5b0de8880f0f8bdb915c860bd79a34f0e8e4b76abc3aea10e36f36b4cabd1a93db1e27853
SSDEEP

3072:+qom4DMrhHWjYyEH4SeeSy7ZCyRlhGSrt1QEiaZiPm2s1P783FzHkAnOfGPxwq6T:+qomfYSerypDGSB1sqq6Ys0M

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

83.151.14.2:9572

Mutex

qzYg48lemddFwWYK

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4320-1-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3768	powershell.exe
4424	powershell.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows PrintUtility = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Support\\PrintUtility.exe"	fXWlfxf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3604 set thread context of 4320	3604	fXWlfxf.exe	85

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	AddInProcess32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4320	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3768	powershell.exe
3768	powershell.exe
4424	powershell.exe
4424	powershell.exe
4320	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4320	AddInProcess32.exe
Token: SeDebugPrivilege	3768	powershell.exe
Token: SeDebugPrivilege	4424	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4320	AddInProcess32.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 3604 wrote to memory of 4320	3604	fXWlfxf.exe	85
PID 4320 wrote to memory of 3768	4320	AddInProcess32.exe	86
PID 4320 wrote to memory of 3768	4320	AddInProcess32.exe	86
PID 4320 wrote to memory of 3768	4320	AddInProcess32.exe	86
PID 4320 wrote to memory of 4424	4320	AddInProcess32.exe	90
PID 4320 wrote to memory of 4424	4320	AddInProcess32.exe	90
PID 4320 wrote to memory of 4424	4320	AddInProcess32.exe	90

C:\Users\Admin\AppData\Local\Temp\fXWlfxf.exe
"C:\Users\Admin\AppData\Local\Temp\fXWlfxf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4320
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3768
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'AddInProcess32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4424

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

Filesize
18KB

MD5
cc7a741940acb2a89dd73ea3e8048ae6

SHA1
2f61ee5652746d72d17e82bd2dc72090ed5dba27

SHA256
7762986ff81f416f6b1b68808e46b4bfc3720ab817b5cd58cfb637b116d1bb7f

SHA512
f51e24725d4ba5afd844304048269ce62a0073b877ab9ea3e8b67cd1cc4a1b239c1ec46f6e0e7321ca130d970175a3aeff128addc162a6ae2d5cb4d9b9f70c89

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2la4u05j.qft.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3768-36-0x00000000066B0000-0x00000000066CE000-memory.dmp

Filesize
120KB

Download
memory/3768-49-0x0000000007720000-0x0000000007728000-memory.dmp

Filesize
32KB

Download
memory/3768-7-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-6-0x00000000053D0000-0x00000000059F8000-memory.dmp

Filesize
6.2MB

Download
memory/3768-8-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-9-0x0000000005200000-0x0000000005222000-memory.dmp

Filesize
136KB

Download
memory/3768-10-0x0000000005A00000-0x0000000005A66000-memory.dmp

Filesize
408KB

Download
memory/3768-11-0x0000000005A70000-0x0000000005AD6000-memory.dmp

Filesize
408KB

Download
memory/3768-4-0x00000000027F0000-0x0000000002826000-memory.dmp

Filesize
216KB

Download
memory/3768-21-0x0000000005C10000-0x0000000005F64000-memory.dmp

Filesize
3.3MB

Download
memory/3768-22-0x00000000060D0000-0x00000000060EE000-memory.dmp

Filesize
120KB

Download
memory/3768-23-0x0000000006620000-0x000000000666C000-memory.dmp

Filesize
304KB

Download
memory/3768-26-0x00000000707F0000-0x000000007083C000-memory.dmp

Filesize
304KB

Download
memory/3768-40-0x0000000007A40000-0x00000000080BA000-memory.dmp

Filesize
6.5MB

Download
memory/3768-24-0x00000000072D0000-0x0000000007302000-memory.dmp

Filesize
200KB

Download
memory/3768-37-0x0000000007310000-0x00000000073B3000-memory.dmp

Filesize
652KB

Download
memory/3768-38-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-39-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-41-0x0000000007400000-0x000000000741A000-memory.dmp

Filesize
104KB

Download
memory/3768-52-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-25-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-42-0x0000000007470000-0x000000000747A000-memory.dmp

Filesize
40KB

Download
memory/3768-43-0x0000000007680000-0x0000000007716000-memory.dmp

Filesize
600KB

Download
memory/3768-44-0x0000000007600000-0x0000000007611000-memory.dmp

Filesize
68KB

Download
memory/3768-5-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-46-0x0000000007630000-0x000000000763E000-memory.dmp

Filesize
56KB

Download
memory/3768-47-0x0000000007640000-0x0000000007654000-memory.dmp

Filesize
80KB

Download
memory/3768-48-0x0000000007740000-0x000000000775A000-memory.dmp

Filesize
104KB

Download
memory/4320-45-0x000000007524E000-0x000000007524F000-memory.dmp

Filesize
4KB

Download
memory/4320-3-0x0000000005500000-0x000000000559C000-memory.dmp

Filesize
624KB

Download
memory/4320-2-0x000000007524E000-0x000000007524F000-memory.dmp

Filesize
4KB

Download
memory/4320-79-0x0000000006230000-0x000000000623A000-memory.dmp

Filesize
40KB

Download
memory/4320-76-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/4320-77-0x00000000064C0000-0x0000000006A64000-memory.dmp

Filesize
5.6MB

Download
memory/4320-78-0x0000000006250000-0x00000000062E2000-memory.dmp

Filesize
584KB

Download
memory/4320-1-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/4320-80-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/4424-65-0x00000000707F0000-0x000000007083C000-memory.dmp

Filesize
304KB

Download
memory/4424-63-0x0000000005CB0000-0x0000000006004000-memory.dmp

Filesize
3.3MB

Download