xworm | 90d2777179534bb5746559397a767aeee141f30a57b53c5d9c2122278b4bc4b7

General

Target

XClient.exe
Size

67KB
MD5

404dee8c8fe0b8c25ac39f60960dcbf0
SHA1

078b5427a3c29a2f410f0e09f667389ad630ed60
SHA256

90d2777179534bb5746559397a767aeee141f30a57b53c5d9c2122278b4bc4b7
SHA512

9d7c6c2cceff330acea030002c4c7fde0a9ebe4f6a94a035e6fd6f08d7f5fea407680e5acd5baef687a19f40e116c47e8615dd4f728bdac7636529665e83956e
SSDEEP

768:I9Zqr1TeXYQI9WFFTLmxVm2LXT8fbKQCQ/bm1f5Nc0Mrufk+NY1DT4sMOcPhoRcp:1r1g+wrXFfsybmtlMi2asMOasUbj

Score

10^/10

xworm evasion persistence rat trojan

Malware Config

Signatures

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

XClient.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	XClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	XClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	XClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	XClient.exe

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Disables Task Manager via registry modification
evasion
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

Processes:

XClient.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation XClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Processes:

XClient.exeXClient.exe

pid process

4288 XClient.exe
4236 XClient.exe

pid	process
4288	XClient.exe
4236	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\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.

Processes:

flow ioc

28 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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
T1053

Processes:

schtasks.exe

pid process

980 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

XClient.exepowershell.exe

pid process

3716 XClient.exe
2836 powershell.exe
2836 powershell.exe

flow	ioc
28	ip-api.com

pid	process
980	schtasks.exe

pid	process
3716	XClient.exe
2836	powershell.exe
2836	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

XClient.exeXClient.exepowershell.exeXClient.exe

description	pid	process
Token: SeDebugPrivilege	3716	XClient.exe
Token: SeDebugPrivilege	3716	XClient.exe
Token: SeDebugPrivilege	4288	XClient.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	4236	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

3716 XClient.exe

pid	process
3716	XClient.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 3716 wrote to memory of 980	3716	XClient.exe	schtasks.exe
PID 3716 wrote to memory of 980	3716	XClient.exe	schtasks.exe
PID 3716 wrote to memory of 2836	3716	XClient.exe	powershell.exe
PID 3716 wrote to memory of 2836	3716	XClient.exe	powershell.exe

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⤵
- Modifies Windows Defender Real-time Protection settings
- 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:3716

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\Roaming\XClient.exe"
2⤵
- Creates scheduled task(s)
PID:980

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2836

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4288

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4236

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Disabling Security Tools

1

T1089

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4jfyvnoj.p5l.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe
Filesize
67KB

MD5
404dee8c8fe0b8c25ac39f60960dcbf0

SHA1
078b5427a3c29a2f410f0e09f667389ad630ed60

SHA256
90d2777179534bb5746559397a767aeee141f30a57b53c5d9c2122278b4bc4b7

SHA512
9d7c6c2cceff330acea030002c4c7fde0a9ebe4f6a94a035e6fd6f08d7f5fea407680e5acd5baef687a19f40e116c47e8615dd4f728bdac7636529665e83956e

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe
Filesize
67KB

MD5
404dee8c8fe0b8c25ac39f60960dcbf0

SHA1
078b5427a3c29a2f410f0e09f667389ad630ed60

SHA256
90d2777179534bb5746559397a767aeee141f30a57b53c5d9c2122278b4bc4b7

SHA512
9d7c6c2cceff330acea030002c4c7fde0a9ebe4f6a94a035e6fd6f08d7f5fea407680e5acd5baef687a19f40e116c47e8615dd4f728bdac7636529665e83956e

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe
Filesize
67KB

MD5
404dee8c8fe0b8c25ac39f60960dcbf0

SHA1
078b5427a3c29a2f410f0e09f667389ad630ed60

SHA256
90d2777179534bb5746559397a767aeee141f30a57b53c5d9c2122278b4bc4b7

SHA512
9d7c6c2cceff330acea030002c4c7fde0a9ebe4f6a94a035e6fd6f08d7f5fea407680e5acd5baef687a19f40e116c47e8615dd4f728bdac7636529665e83956e

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe
Filesize
67KB

MD5
404dee8c8fe0b8c25ac39f60960dcbf0

SHA1
078b5427a3c29a2f410f0e09f667389ad630ed60

SHA256
90d2777179534bb5746559397a767aeee141f30a57b53c5d9c2122278b4bc4b7

SHA512
9d7c6c2cceff330acea030002c4c7fde0a9ebe4f6a94a035e6fd6f08d7f5fea407680e5acd5baef687a19f40e116c47e8615dd4f728bdac7636529665e83956e

Download Submit
memory/2836-159-0x000001BFBADE0000-0x000001BFBADF0000-memory.dmp

Filesize
64KB

Download
memory/2836-153-0x000001BFA27A0000-0x000001BFA27C2000-memory.dmp

Filesize
136KB

Download
memory/2836-158-0x000001BFBADE0000-0x000001BFBADF0000-memory.dmp

Filesize
64KB

Download
memory/2836-160-0x000001BFBADE0000-0x000001BFBADF0000-memory.dmp

Filesize
64KB

Download
memory/3716-133-0x00000000004B0000-0x00000000004C8000-memory.dmp

Filesize
96KB

Download
memory/3716-143-0x000000001BDD0000-0x000000001BDE0000-memory.dmp

Filesize
64KB

Download
memory/3716-134-0x000000001BDD0000-0x000000001BDE0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads