xworm | 5d3f76dc4c4191ac7baa3ba130abdce26bef47962e7c33645e0a30dd6635eeab

Analysis

max time kernel
128s
max time network
145s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250113-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
21-01-2025 20:18

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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
behavioral1/memory/1884-0-0x0000000000400000-0x0000000000410000-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
1800	powershell.exe
1512	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-1-5-21-3982764349-3037452555-3708423086-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows SecurityAgent = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Support\\SecurityAgent.exe"	fXWlfxf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1112 set thread context of 1884	1112	fXWlfxf.exe	82

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
1884	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1800	powershell.exe
1800	powershell.exe
1512	powershell.exe
1512	powershell.exe
1884	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeDebugPrivilege	1884	AddInProcess32.exe
Token: SeDebugPrivilege	1800	powershell.exe
Token: SeIncreaseQuotaPrivilege	1800	powershell.exe
Token: SeSecurityPrivilege	1800	powershell.exe
Token: SeTakeOwnershipPrivilege	1800	powershell.exe
Token: SeLoadDriverPrivilege	1800	powershell.exe
Token: SeSystemProfilePrivilege	1800	powershell.exe
Token: SeSystemtimePrivilege	1800	powershell.exe
Token: SeProfSingleProcessPrivilege	1800	powershell.exe
Token: SeIncBasePriorityPrivilege	1800	powershell.exe
Token: SeCreatePagefilePrivilege	1800	powershell.exe
Token: SeBackupPrivilege	1800	powershell.exe
Token: SeRestorePrivilege	1800	powershell.exe
Token: SeShutdownPrivilege	1800	powershell.exe
Token: SeDebugPrivilege	1800	powershell.exe
Token: SeSystemEnvironmentPrivilege	1800	powershell.exe
Token: SeRemoteShutdownPrivilege	1800	powershell.exe
Token: SeUndockPrivilege	1800	powershell.exe
Token: SeManageVolumePrivilege	1800	powershell.exe
Token: 33	1800	powershell.exe
Token: 34	1800	powershell.exe
Token: 35	1800	powershell.exe
Token: 36	1800	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeIncreaseQuotaPrivilege	1512	powershell.exe
Token: SeSecurityPrivilege	1512	powershell.exe
Token: SeTakeOwnershipPrivilege	1512	powershell.exe
Token: SeLoadDriverPrivilege	1512	powershell.exe
Token: SeSystemProfilePrivilege	1512	powershell.exe
Token: SeSystemtimePrivilege	1512	powershell.exe
Token: SeProfSingleProcessPrivilege	1512	powershell.exe
Token: SeIncBasePriorityPrivilege	1512	powershell.exe
Token: SeCreatePagefilePrivilege	1512	powershell.exe
Token: SeBackupPrivilege	1512	powershell.exe
Token: SeRestorePrivilege	1512	powershell.exe
Token: SeShutdownPrivilege	1512	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeSystemEnvironmentPrivilege	1512	powershell.exe
Token: SeRemoteShutdownPrivilege	1512	powershell.exe
Token: SeUndockPrivilege	1512	powershell.exe
Token: SeManageVolumePrivilege	1512	powershell.exe
Token: 33	1512	powershell.exe
Token: 34	1512	powershell.exe
Token: 35	1512	powershell.exe
Token: 36	1512	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1884	AddInProcess32.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1112 wrote to memory of 1884	1112	fXWlfxf.exe	82
PID 1884 wrote to memory of 1800	1884	AddInProcess32.exe	86
PID 1884 wrote to memory of 1800	1884	AddInProcess32.exe	86
PID 1884 wrote to memory of 1800	1884	AddInProcess32.exe	86
PID 1884 wrote to memory of 1512	1884	AddInProcess32.exe	92
PID 1884 wrote to memory of 1512	1884	AddInProcess32.exe	92
PID 1884 wrote to memory of 1512	1884	AddInProcess32.exe	92

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:1112
- 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:1884
- - 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:1800
- - 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:1512

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
f9349064c7c8f8467cc12d78a462e5f9

SHA1
5e1d27fc64751cd8c0e9448ee47741da588b3484

SHA256
883481fe331cb89fb6061e76b43acd4dd638c16f499b10088b261036c6d0547b

SHA512
3229668491b5e4068e743b31f2896b30b1842faf96aff09fad01b08771c2f11eb8d8f02a3b76e31f0d6ad650c2894c5ac1822204e132c03d9c2b8df6ca4cd7cf

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

Filesize
21KB

MD5
25c4fcce26e5d84844928bd15377ac76

SHA1
feff5482bf8ee2a11ca222f1d3ce0949efaac714

SHA256
8ca701c8f19455606fb2b0d667818e5ca4667a98d281c47deb9f6efb368d9924

SHA512
bb25b7b6893ec581bcb4434327fb3e45ea470ef0a48e8e8c2088dccd07d8cbc902e8a7ebb03d125d03cc69406fb84ae3c708622beb69ad3ebf23b589a46e0f11

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_prnhe2su.sjm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1512-59-0x0000000070200000-0x000000007024C000-memory.dmp

Filesize
304KB

Download
memory/1512-57-0x0000000005D60000-0x00000000060B7000-memory.dmp

Filesize
3.3MB

Download
memory/1800-35-0x0000000006540000-0x000000000655E000-memory.dmp

Filesize
120KB

Download
memory/1800-46-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1800-6-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1800-8-0x0000000004E60000-0x0000000004E82000-memory.dmp

Filesize
136KB

Download
memory/1800-10-0x0000000005840000-0x00000000058A6000-memory.dmp

Filesize
408KB

Download
memory/1800-9-0x00000000057D0000-0x0000000005836000-memory.dmp

Filesize
408KB

Download
memory/1800-5-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1800-20-0x0000000005A10000-0x0000000005D67000-memory.dmp

Filesize
3.3MB

Download
memory/1800-21-0x0000000005F20000-0x0000000005F3E000-memory.dmp

Filesize
120KB

Download
memory/1800-22-0x0000000005FD0000-0x000000000601C000-memory.dmp

Filesize
304KB

Download
memory/1800-24-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1800-23-0x0000000007130000-0x0000000007162000-memory.dmp

Filesize
200KB

Download
memory/1800-25-0x0000000070200000-0x000000007024C000-memory.dmp

Filesize
304KB

Download
memory/1800-3-0x00000000024F0000-0x0000000002526000-memory.dmp

Filesize
216KB

Download
memory/1800-36-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1800-4-0x0000000004FD0000-0x000000000569A000-memory.dmp

Filesize
6.8MB

Download
memory/1800-38-0x0000000007170000-0x0000000007213000-memory.dmp

Filesize
652KB

Download
memory/1800-37-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1800-40-0x00000000078F0000-0x0000000007F6A000-memory.dmp

Filesize
6.5MB

Download
memory/1800-41-0x00000000072B0000-0x00000000072CA000-memory.dmp

Filesize
104KB

Download
memory/1800-42-0x0000000007310000-0x000000000731A000-memory.dmp

Filesize
40KB

Download
memory/1800-43-0x0000000007520000-0x00000000075B6000-memory.dmp

Filesize
600KB

Download
memory/1800-7-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1884-39-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

Filesize
4KB

Download
memory/1884-0-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1884-2-0x0000000004EE0000-0x0000000004F7C000-memory.dmp

Filesize
624KB

Download
memory/1884-1-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

Filesize
4KB

Download
memory/1884-71-0x0000000005FE0000-0x0000000006586000-memory.dmp

Filesize
5.6MB

Download
memory/1884-70-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/1884-72-0x0000000005C30000-0x0000000005CC2000-memory.dmp

Filesize
584KB

Download
memory/1884-73-0x0000000005C20000-0x0000000005C2A000-memory.dmp

Filesize
40KB

Download
memory/1884-74-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download