xworm | 26f6a921b85d86b226a45e44de9305ba16f15c6de72c29155fbdc7da9b5e6393

Analysis

max time kernel
74s
max time network
71s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28/05/2024, 12:30

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
XClient.exe
Size 99KB
Sample240528-ppntjsde6z
SHA256 26f6a921b85d86b226a45e44de9305ba16f15c6de72c29155fbdc7da9b5e6393
MD5 03557348a17089f5eb64b6e1c74a30d0
SHA1 f2b334fa78072eda2fc5e8f76ff1b96c500e0ff9
SHA512 23a9ee48bc34d713f39a8cbbc92e2ae65d1487d2533df58878af247fd99553d51965775ce496e2402bc7270bff0130795fb1fe3429da99e23570c0a668937094
SSDEEP 1536:Zz/BN3cQ3Bujs49jFg0/IwXCvxWCGb1u673dxWcm6xkfXjeOUeaxKHsi9rYRT:Zz/L3e9mbQ3bo67evfCOUvwsCCT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
Client.exe
pastebin_url
https://pastebin.com/vnh6mTRX

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/3372-1-0x0000000000DF0000-0x0000000000E0E000-memory.dmp	family_xworm
behavioral1/files/0x000c000000022ac4-57.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
1152	powershell.exe
4800	powershell.exe
4944	powershell.exe
1192	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\Client.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
4524	Client.exe
2844	Client.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\Client = "C:\\ProgramData\\Client.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
32	pastebin.com
31	pastebin.com

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
28	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
1000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1152	powershell.exe
1152	powershell.exe
4800	powershell.exe
4800	powershell.exe
4944	powershell.exe
4944	powershell.exe
1192	powershell.exe
1192	powershell.exe
3372	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3372	XClient.exe
Token: SeDebugPrivilege	1152	powershell.exe
Token: SeDebugPrivilege	4800	powershell.exe
Token: SeDebugPrivilege	4944	powershell.exe
Token: SeDebugPrivilege	1192	powershell.exe
Token: SeDebugPrivilege	3372	XClient.exe
Token: SeDebugPrivilege	4524	Client.exe
Token: SeDebugPrivilege	2844	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3372	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3372 wrote to memory of 1152	3372	XClient.exe	95
PID 3372 wrote to memory of 1152	3372	XClient.exe	95
PID 3372 wrote to memory of 4800	3372	XClient.exe	97
PID 3372 wrote to memory of 4800	3372	XClient.exe	97
PID 3372 wrote to memory of 4944	3372	XClient.exe	100
PID 3372 wrote to memory of 4944	3372	XClient.exe	100
PID 3372 wrote to memory of 1192	3372	XClient.exe	102
PID 3372 wrote to memory of 1192	3372	XClient.exe	102
PID 3372 wrote to memory of 1000	3372	XClient.exe	104
PID 3372 wrote to memory of 1000	3372	XClient.exe	104

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:3372
- 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:1152
- 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:\ProgramData\Client.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4944
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Client.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1192
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Client" /tr "C:\ProgramData\Client.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1000

C:\ProgramData\Client.exe
C:\ProgramData\Client.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4524

C:\ProgramData\Client.exe
C:\ProgramData\Client.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2844

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

Replay Monitor

Loading Replay Monitor...

Downloads

Client.exe

Path C:\ProgramData\Client.exe
Size 99KB
SHA256 26f6a921b85d86b226a45e44de9305ba16f15c6de72c29155fbdc7da9b5e6393
MD5 03557348a17089f5eb64b6e1c74a30d0
SHA1 f2b334fa78072eda2fc5e8f76ff1b96c500e0ff9
SHA512 23a9ee48bc34d713f39a8cbbc92e2ae65d1487d2533df58878af247fd99553d51965775ce496e2402bc7270bff0130795fb1fe3429da99e23570c0a668937094
SSDEEP 1536:Zz/BN3cQ3Bujs49jFg0/IwXCvxWCGb1u673dxWcm6xkfXjeOUeaxKHsi9rYRT:Zz/L3e9mbQ3bo67evfCOUvwsCCT
MD5 SHA1 SHA512 SSDEEP

Submit Download

Client.exe.log

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

Submit Download

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

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233
MD5 2e907f77659a6601fcc408274894da2e
SHA1 9f5b72abef1cd7145bf37547cdb1b9254b4efe9d
SHA512 34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0e1f0e684adb40a5d0668df5fed007c9046137d7ae16a1f2f343b139d5f9bc93
MD5 e58749a7a1826f6ea62df1e2ef63a32b
SHA1 c0bca21658b8be4f37b71eec9578bfefa44f862d
SHA512 4cf45b2b11ab31e7f67fff286b29d50ed28cd6043091144c5c0f1348b5f5916ed7479cf985595e6f096b586ab93b4b5dce612f688049b8366a2dd91863e98b70
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db
MD5 b51dc9e5ec3c97f72b4ca9488bbb4462
SHA1 5c1e8c0b728cd124edcacefb399bbd5e25b21bd3
SHA512 0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_mf31e102.se5.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mf31e102.se5.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/1152-15-0x00007FFCCB8F0000-0x00007FFCCC3B1000-memory.dmp

Download

memory/1152-18-0x00007FFCCB8F0000-0x00007FFCCC3B1000-memory.dmp

Download

memory/1152-14-0x00007FFCCB8F0000-0x00007FFCCC3B1000-memory.dmp

Download

memory/1152-13-0x0000028D34640000-0x0000028D34662000-memory.dmp

Download

memory/1152-3-0x00007FFCCB8F0000-0x00007FFCCC3B1000-memory.dmp

Download

memory/3372-0-0x00007FFCCB8F3000-0x00007FFCCB8F5000-memory.dmp

Download

memory/3372-2-0x00007FFCCB8F0000-0x00007FFCCC3B1000-memory.dmp

Download

memory/3372-60-0x00007FFCCB8F3000-0x00007FFCCB8F5000-memory.dmp

Download

memory/3372-61-0x00007FFCCB8F0000-0x00007FFCCC3B1000-memory.dmp

Download

memory/3372-1-0x0000000000DF0000-0x0000000000E0E000-memory.dmp

Download