xworm | 969f27d3500201bbd7070c28322ef7ab5554e556ecd5fbca806a560e091eb058

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 12:50

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General

Target
XClient.exe
Size 41KB
Sample240605-p21zmsgf57
SHA256 969f27d3500201bbd7070c28322ef7ab5554e556ecd5fbca806a560e091eb058
MD5 d413f5d980ff7ebbc56e2598b4403e36
SHA1 01f8a25472c797a0d7265106690768b1962e8a56
SHA512 efe4edbafce0c2cf9c97316f5ca6af914773af66b5246aa67933ff8f37ec85a5d0c3b0e809fb0deef2f01d5f90d85e3e235529f9ac90e94aedc2f0c9bfa77911
SSDEEP 768:YmrJDweBDuOkScrbsN/x6WECAr43MxfJF5Pa9p+I6iOwhs3/ibU:Y0DwewicrbsN/YDRrNRF49II6iOw+aI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

silver-bare.gl.at.ply.gg:11694

Mutex

FEyTHKiZ4I1XRcuJ

Attributes

Install_directory
%AppData%
install_file
Bootstapper.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2680-1-0x00000000000D0000-0x00000000000E0000-memory.dmp	family_xworm
behavioral2/files/0x0009000000023397-59.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
4800	powershell.exe
748	powershell.exe
4992	powershell.exe
3200	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-1-5-21-4124900551-4068476067-3491212533-1000\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\Bootstapper.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Bootstapper.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
392	Bootstapper.exe
2272	Bootstapper.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Bootstapper = "C:\\Users\\Admin\\AppData\\Roaming\\Bootstapper.exe"	XClient.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
11	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
4516	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3200	powershell.exe
3200	powershell.exe
4800	powershell.exe
4800	powershell.exe
748	powershell.exe
748	powershell.exe
4992	powershell.exe
4992	powershell.exe
2680	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2680	XClient.exe
Token: SeDebugPrivilege	3200	powershell.exe
Token: SeDebugPrivilege	4800	powershell.exe
Token: SeDebugPrivilege	748	powershell.exe
Token: SeDebugPrivilege	4992	powershell.exe
Token: SeDebugPrivilege	2680	XClient.exe
Token: SeDebugPrivilege	392	Bootstapper.exe
Token: SeDebugPrivilege	2272	Bootstapper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2680	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 3200	2680	XClient.exe	98
PID 2680 wrote to memory of 3200	2680	XClient.exe	98
PID 2680 wrote to memory of 4800	2680	XClient.exe	100
PID 2680 wrote to memory of 4800	2680	XClient.exe	100
PID 2680 wrote to memory of 748	2680	XClient.exe	102
PID 2680 wrote to memory of 748	2680	XClient.exe	102
PID 2680 wrote to memory of 4992	2680	XClient.exe	104
PID 2680 wrote to memory of 4992	2680	XClient.exe	104
PID 2680 wrote to memory of 4516	2680	XClient.exe	106
PID 2680 wrote to memory of 4516	2680	XClient.exe	106

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:2680
- 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:3200
- 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:4800
- 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\Bootstapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Bootstapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4992
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Bootstapper" /tr "C:\Users\Admin\AppData\Roaming\Bootstapper.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4516

C:\Users\Admin\AppData\Roaming\Bootstapper.exe
C:\Users\Admin\AppData\Roaming\Bootstapper.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:392

C:\Users\Admin\AppData\Roaming\Bootstapper.exe
C:\Users\Admin\AppData\Roaming\Bootstapper.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2272

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

Bootstapper.exe.log

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

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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 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f642e109f4de564cd06dad4a285f428b2257ada93f4da87de0c1ed47c45ac7f2
MD5 be381992e8e61ee8c911a8506866479f
SHA1 49f58ce20cf7bee81c5ad1290fd71cd22371eb9f
SHA512 1f6792ecad80690fdb5a2de9bc5de1771a1cc879c26b0a345deea1737384656c6230cc3257d1a56804de696d7c46d5dcf041e463af821d5e9b492a13d929740d
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 b8554857087834e15d7e447a405831d6d09f57f1ab7fb4ec71fae704de2d1b61
MD5 5f6e13ae5dea0b1fc8bf48c56c57cf3c
SHA1 8e09f2d0c374173e7a1cd61245d7f68db766025e
SHA512 433e1f1551a5751bb0453dbfd54c5a9a77f75d6dc7ebfb406bf5a879f6c81093d5581c18252a9f01c00c5d3999a4de7ccf46edcd9bd0996d3a9a7d82f64615b2
MD5 SHA1 SHA512

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__PSScriptPolicyTest_xbgtn4ep.abo.psm1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xbgtn4ep.abo.psm1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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Bootstapper.exe

Path C:\Users\Admin\AppData\Roaming\Bootstapper.exe
Size 41KB
SHA256 969f27d3500201bbd7070c28322ef7ab5554e556ecd5fbca806a560e091eb058
MD5 d413f5d980ff7ebbc56e2598b4403e36
SHA1 01f8a25472c797a0d7265106690768b1962e8a56
SHA512 efe4edbafce0c2cf9c97316f5ca6af914773af66b5246aa67933ff8f37ec85a5d0c3b0e809fb0deef2f01d5f90d85e3e235529f9ac90e94aedc2f0c9bfa77911
SSDEEP 768:YmrJDweBDuOkScrbsN/x6WECAr43MxfJF5Pa9p+I6iOwhs3/ibU:Y0DwewicrbsN/YDRrNRF49II6iOw+aI
MD5 SHA1 SHA512 SSDEEP

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memory/2680-0-0x00007FF917AA3000-0x00007FF917AA5000-memory.dmp

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memory/2680-2-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

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memory/2680-57-0x00007FF917AA3000-0x00007FF917AA5000-memory.dmp

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memory/2680-58-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

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memory/2680-1-0x00000000000D0000-0x00000000000E0000-memory.dmp

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memory/2680-65-0x0000000002150000-0x000000000215C000-memory.dmp

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memory/3200-14-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

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memory/3200-15-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

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memory/3200-18-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

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memory/3200-13-0x00000284406A0000-0x00000284406C2000-memory.dmp

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memory/3200-3-0x00007FF917AA0000-0x00007FF918561000-memory.dmp

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