xworm | 193ffb07ababa99cf6944129382e85b38218d950016937aceead1112ce4f7d96

General

Target

XClient.exe
Size

67KB
MD5

da221174277f0412d5751d1dd0884215
SHA1

3627c05118667132b109f7b620fc6f33f435ac74
SHA256

193ffb07ababa99cf6944129382e85b38218d950016937aceead1112ce4f7d96
SHA512

172850dca35c00fec6b448a13594debfcd81bf5458054aa9dc0ca932ba1a2321c3d8b77d1037ee2d246cdb402be4a5725e7eee199de252efb1352c4f166f9129
SSDEEP

1536:+XbYW+LOEL57yZbUZaltd5vI6839qOWquqq/0K:+XbH+LOI5eZbUZsNSwOeqRK

Score

10^/10

Malware Config

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4936-1-0x0000000000F70000-0x0000000000F88000-memory.dmp	family_xworm
behavioral2/files/0x0007000000023ca2-47.dat	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
3284	powershell.exe
5052	powershell.exe
1416	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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
2132	XClient.exe
2964	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-1-5-21-2045521122-590294423-3465680274-1000\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
1188	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3284	powershell.exe
3284	powershell.exe
5052	powershell.exe
5052	powershell.exe
1416	powershell.exe
1416	powershell.exe
4936	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4936	XClient.exe
Token: SeDebugPrivilege	3284	powershell.exe
Token: SeDebugPrivilege	5052	powershell.exe
Token: SeDebugPrivilege	1416	powershell.exe
Token: SeDebugPrivilege	4936	XClient.exe
Token: SeDebugPrivilege	2132	XClient.exe
Token: SeDebugPrivilege	2964	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4936	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 3284	4936	XClient.exe	84
PID 4936 wrote to memory of 3284	4936	XClient.exe	84
PID 4936 wrote to memory of 5052	4936	XClient.exe	86
PID 4936 wrote to memory of 5052	4936	XClient.exe	86
PID 4936 wrote to memory of 1416	4936	XClient.exe	88
PID 4936 wrote to memory of 1416	4936	XClient.exe	88
PID 4936 wrote to memory of 1188	4936	XClient.exe	90
PID 4936 wrote to memory of 1188	4936	XClient.exe	90

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:4936
- 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:3284
- 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:5052
- 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:1416
- 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:1188

C:\Users\Admin\AppData\Local\XClient.exe
C:\Users\Admin\AppData\Local\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2132

C:\Users\Admin\AppData\Local\XClient.exe
C:\Users\Admin\AppData\Local\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2964

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
e3b6cc0fbea08a0831f0026a696db8b8

SHA1
4e32202d4700061cfd80d55e42798131c9f530d4

SHA256
3284cae7b82be99d93064390ba071ba4321f3f24dd21515b37b2ca9f31b2e8d5

SHA512
6a06856f360b48c8bc8a15ffb8d7a6604ec357bcb1d0fad5d71a2cb876929a7b67eb40ba4493998ab1bbae8cb71212e124276f27d5c138a135041c27a41a0b7a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_if5dsk1o.fhm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
67KB

MD5
da221174277f0412d5751d1dd0884215

SHA1
3627c05118667132b109f7b620fc6f33f435ac74

SHA256
193ffb07ababa99cf6944129382e85b38218d950016937aceead1112ce4f7d96

SHA512
172850dca35c00fec6b448a13594debfcd81bf5458054aa9dc0ca932ba1a2321c3d8b77d1037ee2d246cdb402be4a5725e7eee199de252efb1352c4f166f9129

Download Submit
memory/3284-11-0x0000018CFC9A0000-0x0000018CFC9C2000-memory.dmp

Filesize
136KB

Download
memory/3284-17-0x00007FFE54FA0000-0x00007FFE55A61000-memory.dmp

Filesize
10.8MB

Download
memory/3284-14-0x00007FFE54FA0000-0x00007FFE55A61000-memory.dmp

Filesize
10.8MB

Download
memory/3284-13-0x00007FFE54FA0000-0x00007FFE55A61000-memory.dmp

Filesize
10.8MB

Download
memory/3284-12-0x00007FFE54FA0000-0x00007FFE55A61000-memory.dmp

Filesize
10.8MB

Download
memory/4936-0-0x00007FFE54FA3000-0x00007FFE54FA5000-memory.dmp

Filesize
8KB

Download
memory/4936-49-0x00007FFE54FA0000-0x00007FFE55A61000-memory.dmp

Filesize
10.8MB

Download
memory/4936-50-0x00007FFE54FA0000-0x00007FFE55A61000-memory.dmp

Filesize
10.8MB

Download
memory/4936-1-0x0000000000F70000-0x0000000000F88000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads