xworm | f87c0372fa88cce78b0ea55b12690f2b69d457a767982d29eee7ee21c3ac04ae

General

Target

Update.exe
Size

83KB
MD5

6908326829a181b7d9682442946b31e6
SHA1

45089240ad3b298ec177703e0c52731930ae1a83
SHA256

f87c0372fa88cce78b0ea55b12690f2b69d457a767982d29eee7ee21c3ac04ae
SHA512

144b7167b2e6e984b7f202ab075b61a49621c12648ec3c46bb130e16d2fca1846f3962772f4db8f5f0f7f104d4d6dd3e3820542cfa004cc70b60f014b687e120
SSDEEP

1536:S+aLEIdiB+1xD0G/lLyHt7abOJgFYIHAD26292OPdP1:qEIk+/7dLyH9abkgS+FgOVN

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

trip-thesaurus.gl.at.ply.gg:16715

Attributes

Install_directory
%AppData%
install_file
Update.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2808-1-0x0000000000290000-0x00000000002AC000-memory.dmp	family_xworm
behavioral1/files/0x000e000000023b91-58.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
544	powershell.exe
4612	powershell.exe
1708	powershell.exe
856	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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	Update.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1700	Update.exe
4744	Update.exe
1784	Update.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	Update.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
2156	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2808	Update.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
856	powershell.exe
856	powershell.exe
544	powershell.exe
544	powershell.exe
4612	powershell.exe
4612	powershell.exe
1708	powershell.exe
1708	powershell.exe
2808	Update.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	Update.exe
Token: SeDebugPrivilege	856	powershell.exe
Token: SeDebugPrivilege	544	powershell.exe
Token: SeDebugPrivilege	4612	powershell.exe
Token: SeDebugPrivilege	1708	powershell.exe
Token: SeDebugPrivilege	2808	Update.exe
Token: SeDebugPrivilege	1700	Update.exe
Token: SeDebugPrivilege	4744	Update.exe
Token: SeDebugPrivilege	1784	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2808	Update.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 856	2808	Update.exe	84
PID 2808 wrote to memory of 856	2808	Update.exe	84
PID 2808 wrote to memory of 544	2808	Update.exe	86
PID 2808 wrote to memory of 544	2808	Update.exe	86
PID 2808 wrote to memory of 4612	2808	Update.exe	88
PID 2808 wrote to memory of 4612	2808	Update.exe	88
PID 2808 wrote to memory of 1708	2808	Update.exe	90
PID 2808 wrote to memory of 1708	2808	Update.exe	90
PID 2808 wrote to memory of 2156	2808	Update.exe	92
PID 2808 wrote to memory of 2156	2808	Update.exe	92

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\Update.exe
"C:\Users\Admin\AppData\Local\Temp\Update.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2808
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:856
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:544
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4612
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1708
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2156

C:\Users\Admin\AppData\Roaming\Update.exe
C:\Users\Admin\AppData\Roaming\Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1700

C:\Users\Admin\AppData\Roaming\Update.exe
C:\Users\Admin\AppData\Roaming\Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4744

C:\Users\Admin\AppData\Roaming\Update.exe
C:\Users\Admin\AppData\Roaming\Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1784

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\Update.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
a43e653ffb5ab07940f4bdd9cc8fade4

SHA1
af43d04e3427f111b22dc891c5c7ee8a10ac4123

SHA256
c4c53abb13e99475aebfbe9fec7a8fead81c14c80d9dcc2b81375304f3a683fe

SHA512
62a97e95e1f19a8d4302847110dae44f469877eed6aa8ea22345c6eb25ee220e7d310fa0b7ec5df42356815421c0af7c46a0f1fee8933cc446641800eda6cd1b

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

Filesize
944B

MD5
d10bb575d0bab08c2e4ce323acfc4295

SHA1
d7365612c6657d45be4d03c0266a599d9a915952

SHA256
a24901f03b41f8e3b914e27d9cf2c01d2e4d8ee255997d1284ba26b9d317c577

SHA512
78431fb2034e7b31ae83eef57a8728ada28fe78ec0a3e96d912dcc905d965732d96f424145d063ec4e5198aaeb994faa46217baba9293c624cca3d543013f6aa

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

Filesize
944B

MD5
e58749a7a1826f6ea62df1e2ef63a32b

SHA1
c0bca21658b8be4f37b71eec9578bfefa44f862d

SHA256
0e1f0e684adb40a5d0668df5fed007c9046137d7ae16a1f2f343b139d5f9bc93

SHA512
4cf45b2b11ab31e7f67fff286b29d50ed28cd6043091144c5c0f1348b5f5916ed7479cf985595e6f096b586ab93b4b5dce612f688049b8366a2dd91863e98b70

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

Filesize
944B

MD5
fd98baf5a9c30d41317663898985593b

SHA1
ea300b99f723d2429d75a6c40e0838bf60f17aad

SHA256
9d97a5bbc88fdcceac25f293383f7e5ce242675460ffbfb2ee9090870c034e96

SHA512
bf4dbbd671b5d7afb326622a7c781f150860294d3dba7160330046c258c84a15981c70e50d84dc7faaa7cc8b8c90bf8df818b3f2d3806a8a3671dfe5e38fe7b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s54hethm.f30.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
83KB

MD5
6908326829a181b7d9682442946b31e6

SHA1
45089240ad3b298ec177703e0c52731930ae1a83

SHA256
f87c0372fa88cce78b0ea55b12690f2b69d457a767982d29eee7ee21c3ac04ae

SHA512
144b7167b2e6e984b7f202ab075b61a49621c12648ec3c46bb130e16d2fca1846f3962772f4db8f5f0f7f104d4d6dd3e3820542cfa004cc70b60f014b687e120

Download Submit
memory/856-8-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/856-18-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/856-15-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/856-14-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/856-13-0x000001EC94640000-0x000001EC94662000-memory.dmp

Filesize
136KB

Download
memory/2808-0-0x00007FFA8A943000-0x00007FFA8A945000-memory.dmp

Filesize
8KB

Download
memory/2808-57-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/2808-2-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/2808-1-0x0000000000290000-0x00000000002AC000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads