xworm | d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2

General

Target

XClient.exe
Size

80KB
MD5

bee4a56d9ba0426d3c95dde1970f6429
SHA1

2bfa99521d4a4f2ed6f9b457074ecf1fae7cd712
SHA256

d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2
SHA512

294855ac413dec844467c23ddef1dd87334d0f83f5053a6e9e0b66f032d48e748351f4fa95e166d33c4385c4734d4f4af27365d3379d480a5b5a8ecb30e5f660
SSDEEP

1536:NF423Du5xn5JrsFkAZb1SfMP0I6naOwi0Wasei/mH:NF42zux5WFkAZb14xaObRoH

Score

10^/10

Malware Config

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2560-1-0x0000000001120000-0x000000000113A000-memory.dmp	family_xworm
behavioral1/files/0x000a000000003cf2-28.dat	family_xworm
behavioral1/memory/3032-36-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_xworm
behavioral1/memory/2500-39-0x0000000000EF0000-0x0000000000F0A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1644	powershell.exe
2776	powershell.exe
2160	powershell.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

Executes dropped EXE 2 IoCs

pid	Process
3032	XClient.exe
2500	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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\XClient.exe"	XClient.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1644	powershell.exe
2776	powershell.exe
2160	powershell.exe
2560	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2560	XClient.exe
Token: SeDebugPrivilege	1644	powershell.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	2160	powershell.exe
Token: SeDebugPrivilege	2560	XClient.exe
Token: SeDebugPrivilege	3032	XClient.exe
Token: SeDebugPrivilege	2500	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2560	XClient.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 1644	2560	XClient.exe	31
PID 2560 wrote to memory of 1644	2560	XClient.exe	31
PID 2560 wrote to memory of 1644	2560	XClient.exe	31
PID 2560 wrote to memory of 2776	2560	XClient.exe	33
PID 2560 wrote to memory of 2776	2560	XClient.exe	33
PID 2560 wrote to memory of 2776	2560	XClient.exe	33
PID 2560 wrote to memory of 2160	2560	XClient.exe	35
PID 2560 wrote to memory of 2160	2560	XClient.exe	35
PID 2560 wrote to memory of 2160	2560	XClient.exe	35
PID 2560 wrote to memory of 2900	2560	XClient.exe	37
PID 2560 wrote to memory of 2900	2560	XClient.exe	37
PID 2560 wrote to memory of 2900	2560	XClient.exe	37
PID 2828 wrote to memory of 3032	2828	taskeng.exe	41
PID 2828 wrote to memory of 3032	2828	taskeng.exe	41
PID 2828 wrote to memory of 3032	2828	taskeng.exe	41
PID 2828 wrote to memory of 2500	2828	taskeng.exe	43
PID 2828 wrote to memory of 2500	2828	taskeng.exe	43
PID 2828 wrote to memory of 2500	2828	taskeng.exe	43

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⤵
- 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:2560
- 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:1644
- 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\Local\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2160
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Local\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2900

C:\Windows\system32\taskeng.exe
taskeng.exe {3FBC1343-FEA1-4B06-8192-E8F2FF2D1035} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Users\Admin\AppData\Local\XClient.exe
  C:\Users\Admin\AppData\Local\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3032
- C:\Users\Admin\AppData\Local\XClient.exe
  C:\Users\Admin\AppData\Local\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\XClient.exe

Filesize
80KB

MD5
bee4a56d9ba0426d3c95dde1970f6429

SHA1
2bfa99521d4a4f2ed6f9b457074ecf1fae7cd712

SHA256
d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2

SHA512
294855ac413dec844467c23ddef1dd87334d0f83f5053a6e9e0b66f032d48e748351f4fa95e166d33c4385c4734d4f4af27365d3379d480a5b5a8ecb30e5f660

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
b74bf99ed35a444af332f25df2adcb5f

SHA1
adfec3304c596b825357a2e7ed6527333dbf2f89

SHA256
1c8274dfc3e866ab1d05628a7514c2e9d62d7793b6ba5354e323ef19b15aae71

SHA512
5c4108a0901ac56aab0618659b2bedbe4d464f0c63743aed615654a6b0e774e7890c4d462c59f5b8585edc49bf6ced52deb23e211bf9484f4335a6f280d24223

Download Submit
memory/1644-7-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/1644-8-0x0000000002170000-0x0000000002178000-memory.dmp

Filesize
32KB

Download
memory/1644-6-0x0000000002C70000-0x0000000002CF0000-memory.dmp

Filesize
512KB

Download
memory/2500-39-0x0000000000EF0000-0x0000000000F0A000-memory.dmp

Filesize
104KB

Download
memory/2560-0-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2560-1-0x0000000001120000-0x000000000113A000-memory.dmp

Filesize
104KB

Download
memory/2560-30-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2560-31-0x000000001B480000-0x000000001B500000-memory.dmp

Filesize
512KB

Download
memory/2560-32-0x000000001B480000-0x000000001B500000-memory.dmp

Filesize
512KB

Download
memory/2776-15-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2776-14-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/3032-36-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads