xworm | 2a03094b59e5dbc2e69fa76f01a35c58fb5466c9b47b87d621fb26b0b037ee59

Analysis

max time kernel
125s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
15-11-2024 20:04

Sharing

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Reason

Machine shutdown

Report Analysis Logs

General

Target

SolaraBootstrapper.exe
Size

266KB
MD5

bfea4fbe1ad2dc882c79c09f103fd395
SHA1

48d80787945fc1355ce97ab5dc795cf0e7b25f01
SHA256

2a03094b59e5dbc2e69fa76f01a35c58fb5466c9b47b87d621fb26b0b037ee59
SHA512

2043da716ff26e1fa635a2e13e2191e04c2713ae05eca35540d4148dfbcd2ced76ec977419c10c7d164b1fc0336cad4d7c70267307169aae50c4577484b4204f
SSDEEP

3072:xnkK65+bdKBfKOwcliLvAzII9x66AOag74srxxVfPWKvQIFY623:xndbbwxPqONxTGqQI+62

Score

10^/10

xworm bootkit discovery evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

18.ip.gl.ply.gg:19043

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4224-1-0x00000000000A0000-0x00000000000E8000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	pjfiyj.exe

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1780	powershell.exe
2424	powershell.exe
4352	powershell.exe
2276	powershell.exe

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 4 IoCs

persistence

Image File Execution Options Injection

T1546.012

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	pjfiyj.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\pjfiyj.exe"	pjfiyj.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe	pjfiyj.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\pjfiyj.exe"	pjfiyj.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	pjfiyj.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	SolaraBootstrapper.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
5036	pjfiyj.exe
464	pjfiyj.exe
2404	sejuql.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Java = "C:\\Users\\Admin\\AppData\\Local\\Temp\\pjfiyj.exe"	pjfiyj.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	SolaraBootstrapper.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	pjfiyj.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	pjfiyj.exe

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

System Information Discovery
T1082

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	pjfiyj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pjfiyj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sejuql.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1780	powershell.exe
1780	powershell.exe
2424	powershell.exe
2424	powershell.exe
4352	powershell.exe
4352	powershell.exe
2276	powershell.exe
2276	powershell.exe
4224	SolaraBootstrapper.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe
5036	pjfiyj.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5036	pjfiyj.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4224	SolaraBootstrapper.exe
Token: SeDebugPrivilege	1780	powershell.exe
Token: SeDebugPrivilege	2424	powershell.exe
Token: SeDebugPrivilege	4352	powershell.exe
Token: SeDebugPrivilege	2276	powershell.exe
Token: SeDebugPrivilege	4224	SolaraBootstrapper.exe
Token: SeBackupPrivilege	5036	pjfiyj.exe
Token: SeRestorePrivilege	5036	pjfiyj.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4224	SolaraBootstrapper.exe
5036	pjfiyj.exe
464	pjfiyj.exe
2404	sejuql.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 1780	4224	SolaraBootstrapper.exe	87
PID 4224 wrote to memory of 1780	4224	SolaraBootstrapper.exe	87
PID 4224 wrote to memory of 2424	4224	SolaraBootstrapper.exe	89
PID 4224 wrote to memory of 2424	4224	SolaraBootstrapper.exe	89
PID 4224 wrote to memory of 4352	4224	SolaraBootstrapper.exe	91
PID 4224 wrote to memory of 4352	4224	SolaraBootstrapper.exe	91
PID 4224 wrote to memory of 2276	4224	SolaraBootstrapper.exe	93
PID 4224 wrote to memory of 2276	4224	SolaraBootstrapper.exe	93
PID 4224 wrote to memory of 5036	4224	SolaraBootstrapper.exe	104
PID 4224 wrote to memory of 5036	4224	SolaraBootstrapper.exe	104
PID 4224 wrote to memory of 5036	4224	SolaraBootstrapper.exe	104
PID 5036 wrote to memory of 428	5036	pjfiyj.exe	107
PID 5036 wrote to memory of 428	5036	pjfiyj.exe	107
PID 5036 wrote to memory of 428	5036	pjfiyj.exe	107
PID 4224 wrote to memory of 2404	4224	SolaraBootstrapper.exe	109
PID 4224 wrote to memory of 2404	4224	SolaraBootstrapper.exe	109
PID 4224 wrote to memory of 2404	4224	SolaraBootstrapper.exe	109

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	pjfiyj.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\HideFastUserSwitching = "1"	pjfiyj.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	pjfiyj.exe

C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
1⤵
- Checks computer location settings
- 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:4224
- 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\SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1780
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2424
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4352
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Users\Admin\AppData\Local\Temp\pjfiyj.exe
  "C:\Users\Admin\AppData\Local\Temp\pjfiyj.exe"
  2⤵
  - UAC bypass
  - Event Triggered Execution: Image File Execution Options Injection
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:5036
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c TASKKILL /F /FI "Imagename ne pjfiyj.exe" /FI "USERNAME eq %USERNAME%
    3⤵
    PID:428
- C:\Users\Admin\AppData\Local\Temp\sejuql.exe
  "C:\Users\Admin\AppData\Local\Temp\sejuql.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2404

C:\Users\Admin\AppData\Local\Temp\pjfiyj.exe
C:\Users\Admin\AppData\Local\Temp\pjfiyj.exe explorer.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:464

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

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

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\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_elyzbajv.nux.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
2.5MB

MD5
e578e7a850d3aa28d3b4b06494ce44fc

SHA1
6834297da16460cf51ea0dc90ccc4a3daa258200

SHA256
f2a552096920e692ca2c9c00819f94472092ba77eef2c00a80745c1137b3d79b

SHA512
d3edd3e8f3801614d68f9f8a40051bc116388b36173694433ea5f199b59abd0c2a3edc757a1540f5639c27521c6bce702d52e60ee2549c4944dc5f57795a5c98

Download Submit
memory/464-70-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download
memory/1780-13-0x00007FFF3DBE0000-0x00007FFF3E6A1000-memory.dmp

Filesize
10.8MB

Download
memory/1780-14-0x00007FFF3DBE0000-0x00007FFF3E6A1000-memory.dmp

Filesize
10.8MB

Download
memory/1780-17-0x00007FFF3DBE0000-0x00007FFF3E6A1000-memory.dmp

Filesize
10.8MB

Download
memory/1780-12-0x00007FFF3DBE0000-0x00007FFF3E6A1000-memory.dmp

Filesize
10.8MB

Download
memory/1780-7-0x000001B7BB550000-0x000001B7BB572000-memory.dmp

Filesize
136KB

Download
memory/2404-179-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download
memory/4224-56-0x00007FFF3DBE0000-0x00007FFF3E6A1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-58-0x00007FFF3DBE0000-0x00007FFF3E6A1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-59-0x000000001D0E0000-0x000000001D0EC000-memory.dmp

Filesize
48KB

Download
memory/4224-57-0x00007FFF3DBE3000-0x00007FFF3DBE5000-memory.dmp

Filesize
8KB

Download
memory/4224-0-0x00007FFF3DBE3000-0x00007FFF3DBE5000-memory.dmp

Filesize
8KB

Download
memory/4224-1-0x00000000000A0000-0x00000000000E8000-memory.dmp

Filesize
288KB

Download
memory/5036-91-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download
memory/5036-114-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download
memory/5036-140-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download
memory/5036-161-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download
memory/5036-171-0x0000000000400000-0x00000000006CC000-memory.dmp

Filesize
2.8MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads