xworm | ea4f53c53702abac24804d4cc21275147b4534e2d243fd5b040c056161b4f59b

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28/05/2024, 09:36

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General

Target
XClient.exe
Size 238KB
Sample240528-llb4ssfd27
SHA256 ea4f53c53702abac24804d4cc21275147b4534e2d243fd5b040c056161b4f59b
MD5 4ef596fd9602c129462a1df1a62bfab4
SHA1 77f43ec4b19a876d9f025a1b157162dd94182d22
SHA512 082d839e7264043a549f10d6ee1056aaac2ded2d1a269b9a4d3828e30cee3921cb283d1d44c64b359f4c3ac58618a050958d8ffd1cf67e1568a91fe04eaebbf2
SSDEEP 3072:PwmBib22IeHbOXT928SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9NzLnP:Pob1TH42UhcX7elbKTua9bfF/H9d9n
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

0.tcp.eu.ngrok.io:14859

Attributes

Install_directory
%AppData%
install_file
svhost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1164-1-0x0000000000670000-0x00000000006B0000-memory.dmp	family_xworm
behavioral2/files/0x000c0000000233eb-60.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
4348	powershell.exe
644	powershell.exe
512	powershell.exe
4480	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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2832	svhost.exe
1224	svhost.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-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
22	0.tcp.eu.ngrok.io

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
13	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
1648	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4348	powershell.exe
4348	powershell.exe
644	powershell.exe
644	powershell.exe
512	powershell.exe
512	powershell.exe
4480	powershell.exe
4480	powershell.exe
1164	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1164	XClient.exe
Token: SeDebugPrivilege	4348	powershell.exe
Token: SeDebugPrivilege	644	powershell.exe
Token: SeDebugPrivilege	512	powershell.exe
Token: SeDebugPrivilege	4480	powershell.exe
Token: SeDebugPrivilege	1164	XClient.exe
Token: SeDebugPrivilege	2832	svhost.exe
Token: SeDebugPrivilege	1224	svhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1164	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1164 wrote to memory of 4348	1164	XClient.exe	87
PID 1164 wrote to memory of 4348	1164	XClient.exe	87
PID 1164 wrote to memory of 644	1164	XClient.exe	92
PID 1164 wrote to memory of 644	1164	XClient.exe	92
PID 1164 wrote to memory of 512	1164	XClient.exe	94
PID 1164 wrote to memory of 512	1164	XClient.exe	94
PID 1164 wrote to memory of 4480	1164	XClient.exe	96
PID 1164 wrote to memory of 4480	1164	XClient.exe	96
PID 1164 wrote to memory of 1648	1164	XClient.exe	99
PID 1164 wrote to memory of 1648	1164	XClient.exe	99

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.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:1164
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4348
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:644
- 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\svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:512
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4480
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1648

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2832

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1224

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

Web Service

T1102

Exfiltration

Impact

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Downloads

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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svhost.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svhost.exe.log
Size 654B
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 c660f0db85a1e7f0f68db19868979bf50bd541531babf77a701e1b1ce5e6a391
MD5 e448fe0d240184c6597a31d3be2ced58
SHA1 372b8d8c19246d3e38cd3ba123cc0f56070f03cd
SHA512 0b7f7eae7700d32b18eee3677cb7f89b46ace717fa7e6b501d6c47d54f15dff7e12b49f5a7d36a6ffe4c16165c7d55162db4f3621db545b6af638035752beab4
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98
MD5 eb1ad317bd25b55b2bbdce8a28a74a94
SHA1 98a3978be4d10d62e7411946474579ee5bdc5ea6
SHA512 d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 376a826ddf8334d1915f59e85a09ed0d951ab952bf09364148349320c18c044c
MD5 56b6347d620b998ae20075494ac7b1e1
SHA1 ffa1da29c41ac2f64193de584b1c849424de08c1
SHA512 9b8847de9dae6113c6ebfad4d0c557364a9b2f5a30ea3a9f4b7f56c0c44aaa08fb8309884eaf8ef06cc0d1f2378782ea06e04cbbe63bf7eb9d27572984f6ce43
MD5 SHA1 SHA512

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__PSScriptPolicyTest_4fgxo0at.j1k.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4fgxo0at.j1k.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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svhost.exe

Path C:\Users\Admin\AppData\Roaming\svhost.exe
Size 238KB
SHA256 ea4f53c53702abac24804d4cc21275147b4534e2d243fd5b040c056161b4f59b
MD5 4ef596fd9602c129462a1df1a62bfab4
SHA1 77f43ec4b19a876d9f025a1b157162dd94182d22
SHA512 082d839e7264043a549f10d6ee1056aaac2ded2d1a269b9a4d3828e30cee3921cb283d1d44c64b359f4c3ac58618a050958d8ffd1cf67e1568a91fe04eaebbf2
SSDEEP 3072:PwmBib22IeHbOXT928SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9NzLnP:Pob1TH42UhcX7elbKTua9bfF/H9d9n
MD5 SHA1 SHA512 SSDEEP

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memory/1164-1-0x0000000000670000-0x00000000006B0000-memory.dmp

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memory/1164-2-0x00007FFF07970000-0x00007FFF08431000-memory.dmp

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memory/1164-0-0x00007FFF07973000-0x00007FFF07975000-memory.dmp

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memory/1164-58-0x00007FFF07970000-0x00007FFF08431000-memory.dmp

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memory/1164-57-0x00007FFF07973000-0x00007FFF07975000-memory.dmp

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memory/4348-13-0x000001D473330000-0x000001D473352000-memory.dmp

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memory/4348-18-0x00007FFF07970000-0x00007FFF08431000-memory.dmp

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memory/4348-15-0x00007FFF07970000-0x00007FFF08431000-memory.dmp

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memory/4348-14-0x00007FFF07970000-0x00007FFF08431000-memory.dmp

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memory/4348-3-0x00007FFF07970000-0x00007FFF08431000-memory.dmp

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