xworm | 5d3f76dc4c4191ac7baa3ba130abdce26bef47962e7c33645e0a30dd6635eeab

Analysis

max time kernel
133s
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
21-01-2025 20:35

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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/1976-1-0x0000000000400000-0x0000000000410000-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
3988	powershell.exe
772	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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows UpdateHelper = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Support\\UpdateHelper.exe"	fXWlfxf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4892 set thread context of 1976	4892	fXWlfxf.exe	83

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
1976	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3988	powershell.exe
3988	powershell.exe
772	powershell.exe
772	powershell.exe
1976	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	AddInProcess32.exe
Token: SeDebugPrivilege	3988	powershell.exe
Token: SeDebugPrivilege	772	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1976	AddInProcess32.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 4892 wrote to memory of 1976	4892	fXWlfxf.exe	83
PID 1976 wrote to memory of 3988	1976	AddInProcess32.exe	84
PID 1976 wrote to memory of 3988	1976	AddInProcess32.exe	84
PID 1976 wrote to memory of 3988	1976	AddInProcess32.exe	84
PID 1976 wrote to memory of 772	1976	AddInProcess32.exe	86
PID 1976 wrote to memory of 772	1976	AddInProcess32.exe	86
PID 1976 wrote to memory of 772	1976	AddInProcess32.exe	86

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:4892
- 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:1976
- - 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:3988
- - 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:772

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
3d086a433708053f9bf9523e1d87a4e8

SHA1
b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

SHA256
6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

SHA512
931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

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

Filesize
18KB

MD5
efcc252c5a58a4bc8419678919a3c989

SHA1
716461cd2eb17b0a94d6ddd6538302146b8b63ce

SHA256
d1d8089d776cb893a51acb2dc711734faa03f260a5adde893dd5d89bbe54285d

SHA512
05193a97b37e950dd94fcb2f68cdffec25715afde449dd89270e4ec73c2c99ce02a77edee88d14e1b4ffc2ea99b00b0b95dc6a7cdd07d8441872a1d56dae2074

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mbiuuhvf.gvc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/772-65-0x000000006FCD0000-0x000000006FD1C000-memory.dmp

Filesize
304KB

Download
memory/772-63-0x00000000060F0000-0x0000000006444000-memory.dmp

Filesize
3.3MB

Download
memory/1976-80-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/1976-77-0x00000000068B0000-0x0000000006E54000-memory.dmp

Filesize
5.6MB

Download
memory/1976-76-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/1976-78-0x00000000063C0000-0x0000000006452000-memory.dmp

Filesize
584KB

Download
memory/1976-79-0x0000000006580000-0x000000000658A000-memory.dmp

Filesize
40KB

Download
memory/1976-1-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1976-3-0x0000000005750000-0x00000000057EC000-memory.dmp

Filesize
624KB

Download
memory/1976-2-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/1976-52-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/3988-38-0x0000000007960000-0x0000000007A03000-memory.dmp

Filesize
652KB

Download
memory/3988-45-0x0000000007CD0000-0x0000000007CDE000-memory.dmp

Filesize
56KB

Download
memory/3988-36-0x0000000006D40000-0x0000000006D5E000-memory.dmp

Filesize
120KB

Download
memory/3988-25-0x000000006FCD0000-0x000000006FD1C000-memory.dmp

Filesize
304KB

Download
memory/3988-37-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-24-0x0000000007920000-0x0000000007952000-memory.dmp

Filesize
200KB

Download
memory/3988-23-0x0000000006810000-0x000000000685C000-memory.dmp

Filesize
304KB

Download
memory/3988-39-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-40-0x00000000080E0000-0x000000000875A000-memory.dmp

Filesize
6.5MB

Download
memory/3988-41-0x0000000007AA0000-0x0000000007ABA000-memory.dmp

Filesize
104KB

Download
memory/3988-42-0x0000000007B10000-0x0000000007B1A000-memory.dmp

Filesize
40KB

Download
memory/3988-43-0x0000000007D20000-0x0000000007DB6000-memory.dmp

Filesize
600KB

Download
memory/3988-44-0x0000000007CA0000-0x0000000007CB1000-memory.dmp

Filesize
68KB

Download
memory/3988-26-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-46-0x0000000007CE0000-0x0000000007CF4000-memory.dmp

Filesize
80KB

Download
memory/3988-47-0x0000000007DE0000-0x0000000007DFA000-memory.dmp

Filesize
104KB

Download
memory/3988-48-0x0000000007DC0000-0x0000000007DC8000-memory.dmp

Filesize
32KB

Download
memory/3988-51-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-22-0x0000000006780000-0x000000000679E000-memory.dmp

Filesize
120KB

Download
memory/3988-21-0x0000000006120000-0x0000000006474000-memory.dmp

Filesize
3.3MB

Download
memory/3988-11-0x00000000060B0000-0x0000000006116000-memory.dmp

Filesize
408KB

Download
memory/3988-10-0x0000000006040000-0x00000000060A6000-memory.dmp

Filesize
408KB

Download
memory/3988-9-0x0000000005FA0000-0x0000000005FC2000-memory.dmp

Filesize
136KB

Download
memory/3988-8-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-7-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-6-0x0000000005920000-0x0000000005F48000-memory.dmp

Filesize
6.2MB

Download
memory/3988-5-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3988-4-0x0000000002DF0000-0x0000000002E26000-memory.dmp

Filesize
216KB

Download