xworm | 93f6e24c3bdfe319ecfdb392365e005953978c0a22c395039b7ff68748c1ea65

Analysis

max time kernel
147s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
15/06/2024, 23:23

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General

Target
svchost.exe
Size 82KB
Sample240615-3de9xsshqk
SHA256 93f6e24c3bdfe319ecfdb392365e005953978c0a22c395039b7ff68748c1ea65
MD5 78be454b399112424495ad1d0a1814c3
SHA1 ad168184a578456d4270ef943e2853f92e7c1ec4
SHA512 5a234706df0161482ba30801a5bda78ae82f830abe249ff3d4a7274235f7f5106ba8b6eefd32ac8770cfaa5fdad2819b6e3f3215579b0022960997fe5029b4e5
SSDEEP 1536:o7VE8EIGURix+GT5wTM/AbrdBK0blPfmOYL6cFnTlOXrXux8:oJLEIcII/Abprl2xlOzh
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

runderscore00-37568.portmap.host:37568

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/memory/2684-1-0x0000000000150000-0x000000000016A000-memory.dmp	family_xworm
behavioral3/files/0x000600000002aa02-53.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2868	powershell.exe
3624	powershell.exe
3820	powershell.exe
1928	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
3904	svchost

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-1-5-21-2198854727-3842442895-2838824242-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost"	svchost.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
1	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
1236	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1596	timeout.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2684	svchost.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2868	powershell.exe
2868	powershell.exe
3624	powershell.exe
3624	powershell.exe
3820	powershell.exe
3820	powershell.exe
1928	powershell.exe
1928	powershell.exe
2684	svchost.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2684	svchost.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	3624	powershell.exe
Token: SeDebugPrivilege	3820	powershell.exe
Token: SeDebugPrivilege	1928	powershell.exe
Token: SeDebugPrivilege	2684	svchost.exe
Token: SeDebugPrivilege	3904	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2684	svchost.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2868	2684	svchost.exe	83
PID 2684 wrote to memory of 2868	2684	svchost.exe	83
PID 2684 wrote to memory of 3624	2684	svchost.exe	85
PID 2684 wrote to memory of 3624	2684	svchost.exe	85
PID 2684 wrote to memory of 3820	2684	svchost.exe	87
PID 2684 wrote to memory of 3820	2684	svchost.exe	87
PID 2684 wrote to memory of 1928	2684	svchost.exe	89
PID 2684 wrote to memory of 1928	2684	svchost.exe	89
PID 2684 wrote to memory of 1236	2684	svchost.exe	91
PID 2684 wrote to memory of 1236	2684	svchost.exe	91
PID 2684 wrote to memory of 4804	2684	svchost.exe	94
PID 2684 wrote to memory of 4804	2684	svchost.exe	94
PID 2684 wrote to memory of 4472	2684	svchost.exe	96
PID 2684 wrote to memory of 4472	2684	svchost.exe	96
PID 4472 wrote to memory of 1596	4472	cmd.exe	98
PID 4472 wrote to memory of 1596	4472	cmd.exe	98

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\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2684
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2868
- 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:3624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3820
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1928
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost"
  2⤵
  - Creates scheduled task(s)
  PID:1236
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
  2⤵
  PID:4804
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4CE3.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4472
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1596

C:\ProgramData\svchost
C:\ProgramData\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3904

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

svchost

Path C:\ProgramData\svchost
Size 82KB
SHA256 93f6e24c3bdfe319ecfdb392365e005953978c0a22c395039b7ff68748c1ea65
MD5 78be454b399112424495ad1d0a1814c3
SHA1 ad168184a578456d4270ef943e2853f92e7c1ec4
SHA512 5a234706df0161482ba30801a5bda78ae82f830abe249ff3d4a7274235f7f5106ba8b6eefd32ac8770cfaa5fdad2819b6e3f3215579b0022960997fe5029b4e5
SSDEEP 1536:o7VE8EIGURix+GT5wTM/AbrdBK0blPfmOYL6cFnTlOXrXux8:oJLEIcII/Abprl2xlOzh
MD5 SHA1 SHA512 SSDEEP

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powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8
MD5 05b3cd21c1ec02f04caba773186ee8d0
SHA1 39e790bfe10abf55b74dfb3603df8fcf6b5e6edb
SHA512 e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 c85c7915e0bcc6cc3d7dd2f6b9d9e4f9a3cf0ccefa043b1c500facac8428bfd5
MD5 b0a85f07903eaad4aace8865ff28679f
SHA1 caa147464cf2e31bf9b482c3ba3c5c71951566d1
SHA512 7a650a74a049e71b748f60614723de2b9d2385a0f404606bcb22ae807e22a74c53cf672df9e7a23605dfff37865443a5899eafea323134a818eb59c96e0f94bd
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 a1b5b7ada8ebc910f20f91ada3991d3321104e9da598c958b1edac9f9aca0e90
MD5 cef328ddb1ee8916e7a658919323edd8
SHA1 a676234d426917535e174f85eabe4ef8b88256a5
SHA512 747400c20ca5b5fd1b54bc24e75e6a78f15af61df263be932d2ee7b2f34731c2de8ce03b2706954fb098c1ac36f0b761cf37e418738fa91f2a8ea78572f545cb
MD5 SHA1 SHA512

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__PSScriptPolicyTest_j2qp4ybh.0uq.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_j2qp4ybh.0uq.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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tmp4CE3.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4CE3.tmp.bat
Size 159B
SHA256 e15fce9fee31aeb745353d921a089c3a7e4f9c72e94d652f23cd4016c264d0b0
MD5 1e9b50ec82b47a4b9613a6f96a48f161
SHA1 e7dbb2b1861a4da5cff55076f943e0c8bd49adcc
SHA512 4680f38ba46eb048e3bdfb8d9f820a0d9d139ffe2db0ed9d8fe4281991b30f5356b733d07033bf3ec75724b3904dc2ca7633bf5e4ddd92b308718eb55f10b7a1
MD5 SHA1 SHA512

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memory/2684-1-0x0000000000150000-0x000000000016A000-memory.dmp

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memory/2684-0-0x00007FFD929D3000-0x00007FFD929D5000-memory.dmp

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memory/2684-57-0x000000001C5D0000-0x000000001C5DC000-memory.dmp

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memory/2684-56-0x00007FFD929D3000-0x00007FFD929D5000-memory.dmp

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memory/2868-11-0x00007FFD929D0000-0x00007FFD93492000-memory.dmp

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memory/2868-18-0x00007FFD929D0000-0x00007FFD93492000-memory.dmp

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memory/2868-17-0x00007FFD929D0000-0x00007FFD93492000-memory.dmp

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memory/2868-14-0x00007FFD929D0000-0x00007FFD93492000-memory.dmp

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memory/2868-13-0x00007FFD929D0000-0x00007FFD93492000-memory.dmp

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memory/2868-12-0x00007FFD929D0000-0x00007FFD93492000-memory.dmp

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memory/2868-10-0x000001992BA80000-0x000001992BAA2000-memory.dmp

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