xworm | c452cbd1ba250f9e63e1d277259783b8dede810426b21b2e91762c9a02702990

General

Target

XClient.exe
Size

171KB
MD5

e897e677766711e9b467f0765b1704d9
SHA1

9c4f70c61b538d82f4c6d47deb4fd9d0c4adf2b0
SHA256

c452cbd1ba250f9e63e1d277259783b8dede810426b21b2e91762c9a02702990
SHA512

19a7e0e2ed7da78da5802202a1e0814e12217540797e282ee18f5d2a7f25b8d8bbea2f1ed53fabba6a2bb6dae4fd46051e989ffae2cf4b02cbe02b7c356e1293
SSDEEP

3072:JBAzYQ+bIoFbuluYOOf7h3Bz65/M6If+3Js+3JFkKeTno:J+zmbLc77h3xBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:39377

79.127.146.115:39377

Attributes

Install_directory
%AppData%
install_file
registry.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4836-1-0x0000000000980000-0x00000000009B0000-memory.dmp	family_xworm
behavioral2/files/0x000300000001e769-63.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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3304	powershell.exe
2336	powershell.exe
812	powershell.exe
4472	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-1-5-21-4050598569-1597076380-177084960-1000\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\registry.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\registry.lnk	XClient.exe

Executes dropped EXE 1 IoCs

pid	Process
3840	registry.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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\registry = "C:\\Users\\Admin\\AppData\\Roaming\\registry.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
4940	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3304	powershell.exe
3304	powershell.exe
2336	powershell.exe
2336	powershell.exe
812	powershell.exe
812	powershell.exe
4472	powershell.exe
4472	powershell.exe
4836	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	4836	XClient.exe
Token: SeDebugPrivilege	3304	powershell.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	812	powershell.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeDebugPrivilege	4836	XClient.exe
Token: 33	3724	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	3724	AUDIODG.EXE
Token: SeDebugPrivilege	3840	registry.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4836	XClient.exe
4836	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4836	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4836 wrote to memory of 3304	4836	XClient.exe	89
PID 4836 wrote to memory of 3304	4836	XClient.exe	89
PID 4836 wrote to memory of 2336	4836	XClient.exe	93
PID 4836 wrote to memory of 2336	4836	XClient.exe	93
PID 4836 wrote to memory of 812	4836	XClient.exe	96
PID 4836 wrote to memory of 812	4836	XClient.exe	96
PID 4836 wrote to memory of 4472	4836	XClient.exe	98
PID 4836 wrote to memory of 4472	4836	XClient.exe	98
PID 4836 wrote to memory of 4940	4836	XClient.exe	101
PID 4836 wrote to memory of 4940	4836	XClient.exe	101

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 FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4836
- 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:3304
- 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:2336
- 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\registry.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:812
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'registry.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4472
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "registry" /tr "C:\Users\Admin\AppData\Roaming\registry.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4940

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x244 0x41c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3724

C:\Users\Admin\AppData\Roaming\registry.exe
C:\Users\Admin\AppData\Roaming\registry.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3840

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

Replay Monitor

Loading Replay Monitor...

Downloads

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
34f595487e6bfd1d11c7de88ee50356a

SHA1
4caad088c15766cc0fa1f42009260e9a02f953bb

SHA256
0f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d

SHA512
10976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m3245wug.vba.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\registry.exe

Filesize
171KB

MD5
e897e677766711e9b467f0765b1704d9

SHA1
9c4f70c61b538d82f4c6d47deb4fd9d0c4adf2b0

SHA256
c452cbd1ba250f9e63e1d277259783b8dede810426b21b2e91762c9a02702990

SHA512
19a7e0e2ed7da78da5802202a1e0814e12217540797e282ee18f5d2a7f25b8d8bbea2f1ed53fabba6a2bb6dae4fd46051e989ffae2cf4b02cbe02b7c356e1293

Download Submit
memory/3304-12-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/3304-17-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/3304-14-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/3304-13-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/3304-4-0x000001FCE75F0000-0x000001FCE7612000-memory.dmp

Filesize
136KB

Download
memory/4836-0-0x00007FFA105F3000-0x00007FFA105F5000-memory.dmp

Filesize
8KB

Download
memory/4836-56-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/4836-57-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/4836-58-0x000000001DAA0000-0x000000001DAAC000-memory.dmp

Filesize
48KB

Download
memory/4836-59-0x0000000002AE0000-0x0000000002AEA000-memory.dmp

Filesize
40KB

Download
memory/4836-1-0x0000000000980000-0x00000000009B0000-memory.dmp

Filesize
192KB

Download
memory/4836-66-0x000000001BDF0000-0x000000001BDFA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads