xworm | 10e56b1e7a68494d7d574c641b11f9d37b8dba5881c1e34d5337c93309162831

Analysis

max time kernel
147s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 10:33

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General

Target
XClient.exe
Size 67KB
Sample240608-mlrd6aah4w
SHA256 10e56b1e7a68494d7d574c641b11f9d37b8dba5881c1e34d5337c93309162831
MD5 d79bc15ac6f6b3fd2349ada271729a31
SHA1 6d06d003db70ff628d98ce5b886e64e26e14d67b
SHA512 bac58eaf1580a531558276b5e4e3bd818bc8ca5f4f354c1c5249727b1e17e94681bdbb835910977ea0c1f22e9721cd51a2536811b729e3fb552464a6ad8cc1fb
SSDEEP 1536:FxH0BENHbI5gv/hENkYbpfl4o/6LinOclbHaP:4BucI/+bpLJOc16P
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

european-ba.gl.at.ply.gg:14522

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3356-1-0x00000000008F0000-0x0000000000908000-memory.dmp	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
3244	powershell.exe
2776	powershell.exe
2764	powershell.exe
3732	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-1-5-21-1337824034-2731376981-3755436523-1000\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\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.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
14	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3244	powershell.exe
3244	powershell.exe
2776	powershell.exe
2776	powershell.exe
2764	powershell.exe
2764	powershell.exe
3732	powershell.exe
3732	powershell.exe
3356	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3356	XClient.exe
Token: SeDebugPrivilege	3244	powershell.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	2764	powershell.exe
Token: SeDebugPrivilege	3732	powershell.exe
Token: SeDebugPrivilege	3356	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3356	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3356 wrote to memory of 3244	3356	XClient.exe	89
PID 3356 wrote to memory of 3244	3356	XClient.exe	89
PID 3356 wrote to memory of 2776	3356	XClient.exe	91
PID 3356 wrote to memory of 2776	3356	XClient.exe	91
PID 3356 wrote to memory of 2764	3356	XClient.exe	93
PID 3356 wrote to memory of 2764	3356	XClient.exe	93
PID 3356 wrote to memory of 3732	3356	XClient.exe	96
PID 3356 wrote to memory of 3732	3356	XClient.exe	96

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:3356
- 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:3244
- 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:2776
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- 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:3732

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

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 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 9f7f29a4696876cadca3f14d7e43f9ede0c97fd64be3f5d94bda49a91b6a419e
MD5 e5663972c1caaba7088048911c758bf3
SHA1 3462dea0f9c2c16a9c3afdaef8bbb1f753c1c198
SHA512 ff4e72c46cf083de62baa2ce2661555dd91b5f144294015f7b262fd4500cb67fe80e1871a82da63b607e3e9cef401f4b73c587bf1134637881ecad51aad1eddc
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2a1b2a0074d16b55261614f5778395013537a482758e1674c6c64dda558410ce
MD5 574ff64bf76afb475881c1f935f0eed4
SHA1 4d4f7d308cd3777d2cc6f4e26aa57f341c164565
SHA512 285677ef1e36e04cddfd00f4cd142da66790f5d587aba414287fea18a499af820c6bb18bb2d8f197a724e13fb812bd3c2421710c782c3f6b96b0dd5dd8c5316d
MD5 SHA1 SHA512

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__PSScriptPolicyTest_b5dnpa2x.pog.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_b5dnpa2x.pog.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/3244-3-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3244-11-0x0000020343D40000-0x0000020343D62000-memory.dmp

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memory/3244-5-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3244-18-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3244-4-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3356-0-0x00007FFE5BD23000-0x00007FFE5BD25000-memory.dmp

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memory/3356-2-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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memory/3356-1-0x00000000008F0000-0x0000000000908000-memory.dmp

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memory/3356-57-0x00007FFE5BD23000-0x00007FFE5BD25000-memory.dmp

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memory/3356-58-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

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