xworm | 93f6e24c3bdfe319ecfdb392365e005953978c0a22c395039b7ff68748c1ea65

Analysis

max time kernel
92s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-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
behavioral2/memory/2184-1-0x0000000000AB0000-0x0000000000ACA000-memory.dmp	family_xworm
behavioral2/files/0x00100000000006c5-55.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
632	powershell.exe
3612	powershell.exe
2084	powershell.exe
4648	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	svchost.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
820	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-1-5-21-4204450073-1267028356-951339405-1000\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
20	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
4024	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1204	timeout.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2184	svchost.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3612	powershell.exe
3612	powershell.exe
2084	powershell.exe
2084	powershell.exe
4648	powershell.exe
4648	powershell.exe
632	powershell.exe
632	powershell.exe
2184	svchost.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	svchost.exe
Token: SeDebugPrivilege	3612	powershell.exe
Token: SeDebugPrivilege	2084	powershell.exe
Token: SeDebugPrivilege	4648	powershell.exe
Token: SeDebugPrivilege	632	powershell.exe
Token: SeDebugPrivilege	2184	svchost.exe
Token: SeDebugPrivilege	820	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2184	svchost.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 3612	2184	svchost.exe	86
PID 2184 wrote to memory of 3612	2184	svchost.exe	86
PID 2184 wrote to memory of 2084	2184	svchost.exe	88
PID 2184 wrote to memory of 2084	2184	svchost.exe	88
PID 2184 wrote to memory of 4648	2184	svchost.exe	90
PID 2184 wrote to memory of 4648	2184	svchost.exe	90
PID 2184 wrote to memory of 632	2184	svchost.exe	92
PID 2184 wrote to memory of 632	2184	svchost.exe	92
PID 2184 wrote to memory of 4024	2184	svchost.exe	94
PID 2184 wrote to memory of 4024	2184	svchost.exe	94
PID 2184 wrote to memory of 3556	2184	svchost.exe	99
PID 2184 wrote to memory of 3556	2184	svchost.exe	99
PID 2184 wrote to memory of 4880	2184	svchost.exe	101
PID 2184 wrote to memory of 4880	2184	svchost.exe	101
PID 4880 wrote to memory of 1204	4880	cmd.exe	103
PID 4880 wrote to memory of 1204	4880	cmd.exe	103

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⤵
- Checks computer location settings
- 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:2184
- 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:3612
- 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:2084
- 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:4648
- 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:632
- 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:4024
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
  2⤵
  PID:3556
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp582D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4880
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1204

C:\ProgramData\svchost
C:\ProgramData\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:820

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 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c
MD5 6d42b6da621e8df5674e26b799c8e2aa
SHA1 ab3ce1327ea1eeedb987ec823d5e0cb146bafa48
SHA512 53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 796649641966f606d7217bb94c5c0a6194eef518815dacc86feacdd78d3c1113
MD5 c1b0a9f26c3e1786191e94e419f1fbf9
SHA1 7f3492f4ec2d93e164f43fe2606b53edcffd8926
SHA512 fa0290d77372c26a2f14cb9b0002c222bc757ce7ad02516b884c59a1108f42eb4c76884f9edb6c7149f7c3fac917eda99b72a3b1d72b7e118a1d5a73cadd15a8
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3
MD5 60945d1a2e48da37d4ce8d9c56b6845a
SHA1 83e80a6acbeb44b68b0da00b139471f428a9d6c1
SHA512 5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed
MD5 SHA1 SHA512

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__PSScriptPolicyTest_iuoec00e.lfc.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_iuoec00e.lfc.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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tmp582D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp582D.tmp.bat
Size 159B
SHA256 a53234d167255851956bdf336a3b26ef232d4a87e138e7421636f5444a882e8a
MD5 db3f9a1f9f84b6f923f4ee1cfc16deae
SHA1 02cdf6fbf7b4705514a332d7a271f109f20f40ef
SHA512 d4f15a7c1d27a4d2c9291c6f83e57a243b363022470984bb50fb0e5bb42417e756aba88fcc7e10793852e6240b95fa377d2862e436ed7a04a0e1d3fc6fa28dac
MD5 SHA1 SHA512

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memory/2184-0-0x00007FFB3CCB3000-0x00007FFB3CCB5000-memory.dmp

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memory/2184-1-0x0000000000AB0000-0x0000000000ACA000-memory.dmp

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memory/2184-58-0x00007FFB3CCB3000-0x00007FFB3CCB5000-memory.dmp

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memory/3612-14-0x00007FFB3CCB0000-0x00007FFB3D771000-memory.dmp

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memory/3612-17-0x00007FFB3CCB0000-0x00007FFB3D771000-memory.dmp

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memory/3612-13-0x00007FFB3CCB0000-0x00007FFB3D771000-memory.dmp

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memory/3612-12-0x00007FFB3CCB0000-0x00007FFB3D771000-memory.dmp

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memory/3612-2-0x000002845DB40000-0x000002845DB62000-memory.dmp

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