xworm | f26dcdf460a3da96cedebca9baccca6947bea8f89e3a801118b9cd40da14bfa8

General

Target

Network.exe
Size

226KB
MD5

31c81fac210cd56abb84ff55ede0365b
SHA1

ca8a86da38e111f01ad04c9c537162be2af5f842
SHA256

f26dcdf460a3da96cedebca9baccca6947bea8f89e3a801118b9cd40da14bfa8
SHA512

11d21b79a689a3689470e975d25247639c9a0eba266f70c8d5168b94a06975dc98537206cf753f9a436ee679969a9820f6ffa63fb15852ca05cf0fdf8fdf6eba
SSDEEP

1536:vTtytp4hGT9/gEb8ATRf6VOSQmYqm3uzh+sh8tMI5loD+bhN/N5:vYQcKEb8bOSY3uz0sh8J5loDo/z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

172.86.108.55:7771

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4560-1-0x0000000000760000-0x000000000079E000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023b91-48.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
912	powershell.exe
3656	powershell.exe
3020	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	Network.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4280	Network.exe
668	Network.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\Network = "C:\\Users\\Admin\\AppData\\Roaming\\Network.exe"	Network.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.

flow	ioc
14	ip-api.com

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
1268	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3656	powershell.exe
3656	powershell.exe
3020	powershell.exe
3020	powershell.exe
912	powershell.exe
912	powershell.exe
4560	Network.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4560	Network.exe
Token: SeDebugPrivilege	3656	powershell.exe
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	912	powershell.exe
Token: SeDebugPrivilege	4560	Network.exe
Token: SeDebugPrivilege	4280	Network.exe
Token: SeDebugPrivilege	668	Network.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4560	Network.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4560 wrote to memory of 3656	4560	Network.exe	83
PID 4560 wrote to memory of 3656	4560	Network.exe	83
PID 4560 wrote to memory of 3020	4560	Network.exe	85
PID 4560 wrote to memory of 3020	4560	Network.exe	85
PID 4560 wrote to memory of 912	4560	Network.exe	87
PID 4560 wrote to memory of 912	4560	Network.exe	87
PID 4560 wrote to memory of 1268	4560	Network.exe	91
PID 4560 wrote to memory of 1268	4560	Network.exe	91

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\Network.exe
"C:\Users\Admin\AppData\Local\Temp\Network.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:4560
- 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\Network.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3656
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Network.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3020
- 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\Network.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:912
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Network" /tr "C:\Users\Admin\AppData\Roaming\Network.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1268

C:\Users\Admin\AppData\Roaming\Network.exe
C:\Users\Admin\AppData\Roaming\Network.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4280

C:\Users\Admin\AppData\Roaming\Network.exe
C:\Users\Admin\AppData\Roaming\Network.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:668

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\Network.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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
d3e8199b4634731cf0a0c26c1f14f588

SHA1
7f8fae27eb80055a436a6b5457978f32673d9ad4

SHA256
ef33f487f93c2977e92fb08d6bdcc9d48b5d1864c402f9d3fbf3e1b30e8b3b9a

SHA512
806a123100dbc1ca1b27bbad5b93c3a9a840dc795127af8523333a71259a8c5ef8aefccb83ef390f2644e013f138c4b7b63c584acccb197aada0c70c038032e2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ndjpkgoe.h15.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
226KB

MD5
31c81fac210cd56abb84ff55ede0365b

SHA1
ca8a86da38e111f01ad04c9c537162be2af5f842

SHA256
f26dcdf460a3da96cedebca9baccca6947bea8f89e3a801118b9cd40da14bfa8

SHA512
11d21b79a689a3689470e975d25247639c9a0eba266f70c8d5168b94a06975dc98537206cf753f9a436ee679969a9820f6ffa63fb15852ca05cf0fdf8fdf6eba

Download Submit
memory/3656-3-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/3656-15-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/3656-18-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/3656-14-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/3656-13-0x0000014AD55B0000-0x0000014AD55D2000-memory.dmp

Filesize
136KB

Download
memory/4560-0-0x00007FF878A33000-0x00007FF878A35000-memory.dmp

Filesize
8KB

Download
memory/4560-2-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-50-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-1-0x0000000000760000-0x000000000079E000-memory.dmp

Filesize
248KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads