xworm | 9269bb54f5e7e505de0dc0f406c447625e153b0d79e3d553d1b0f5c79ccbfd6b

General

Target

Zerion(real).exe
Size

68KB
MD5

c78e30aece1251fbca58c57edaf2a9ac
SHA1

d6110e63d2c77b41eb46c0d11fa03d15081bfea4
SHA256

9269bb54f5e7e505de0dc0f406c447625e153b0d79e3d553d1b0f5c79ccbfd6b
SHA512

26838ca19a3c95c730d20ef1a87a5b0fe1713a0bce3437f31f6c06d163c60f04616a7a006add3aff624a332bd038f28b0e969d441c3c8c3421e14996c65102ba
SSDEEP

1536:0QGpw/mylCVbRi+bH5KoEmLd6vPc5OyGayvESuUi:0Qh/mylCVg+bH5+u2COoykh

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7000

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2088-1-0x0000000000170000-0x0000000000188000-memory.dmp	family_xworm
behavioral2/files/0x000f000000023b36-61.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
1572	powershell.exe
2096	powershell.exe
3568	powershell.exe
2316	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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Zerion(real).exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2392	XClient.exe
4924	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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	Zerion(real).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
5064	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1572	powershell.exe
1572	powershell.exe
2096	powershell.exe
2096	powershell.exe
3568	powershell.exe
3568	powershell.exe
2316	powershell.exe
2316	powershell.exe
2088	Zerion(real).exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2088	Zerion(real).exe
Token: SeDebugPrivilege	1572	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	3568	powershell.exe
Token: SeDebugPrivilege	2316	powershell.exe
Token: SeDebugPrivilege	2088	Zerion(real).exe
Token: SeDebugPrivilege	2392	XClient.exe
Token: SeDebugPrivilege	4924	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2088	Zerion(real).exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 1572	2088	Zerion(real).exe	89
PID 2088 wrote to memory of 1572	2088	Zerion(real).exe	89
PID 2088 wrote to memory of 2096	2088	Zerion(real).exe	91
PID 2088 wrote to memory of 2096	2088	Zerion(real).exe	91
PID 2088 wrote to memory of 3568	2088	Zerion(real).exe	96
PID 2088 wrote to memory of 3568	2088	Zerion(real).exe	96
PID 2088 wrote to memory of 2316	2088	Zerion(real).exe	98
PID 2088 wrote to memory of 2316	2088	Zerion(real).exe	98
PID 2088 wrote to memory of 5064	2088	Zerion(real).exe	102
PID 2088 wrote to memory of 5064	2088	Zerion(real).exe	102

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\Zerion(real).exe
"C:\Users\Admin\AppData\Local\Temp\Zerion(real).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:2088
- 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\Zerion(real).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1572
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Zerion(real).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3568
- 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:2316
- 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⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5064

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2392

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4924

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
8f9413617fdb9ddcf3d4b24c7bbb48c7

SHA1
c0604571e0c76e884c35da37a64ccc7541955695

SHA256
24f69708d02efbb4d64a2f4e89624729cd55402849cd97208ccb93e0d6f10bda

SHA512
03d2269c6f0f5d30d688a944a09da75eede4d945425859ab0baafa6a36757cc1d71cbb93a93bf576dffd105aef1dcb80c987e61f2cb9ed66da6c49c01f6bf9dd

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

Filesize
944B

MD5
e60eb305a7b2d9907488068b7065abd3

SHA1
1643dd7f915ac50c75bc01c53d68c5dafb9ce28d

SHA256
ad07460e061642c0dd4e7dfa7b821aacce873e290389e72f708e9f3504f9d135

SHA512
95c45afec6fa4e0b2a21edd10a6b2dc30568810c67bc9bc34d98ab111c48261f377a370583adb27e08616b0108026c119493b1b093b52ce931117e646b46cb7b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rkvw0dcp.xz4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
68KB

MD5
c78e30aece1251fbca58c57edaf2a9ac

SHA1
d6110e63d2c77b41eb46c0d11fa03d15081bfea4

SHA256
9269bb54f5e7e505de0dc0f406c447625e153b0d79e3d553d1b0f5c79ccbfd6b

SHA512
26838ca19a3c95c730d20ef1a87a5b0fe1713a0bce3437f31f6c06d163c60f04616a7a006add3aff624a332bd038f28b0e969d441c3c8c3421e14996c65102ba

Download Submit
memory/1572-12-0x00007FFEFA330000-0x00007FFEFADF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-17-0x00007FFEFA330000-0x00007FFEFADF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-14-0x00007FFEFA330000-0x00007FFEFADF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-13-0x00007FFEFA330000-0x00007FFEFADF1000-memory.dmp

Filesize
10.8MB

Download
memory/1572-8-0x0000026CAC2D0000-0x0000026CAC2F2000-memory.dmp

Filesize
136KB

Download
memory/2088-0-0x00007FFEFA333000-0x00007FFEFA335000-memory.dmp

Filesize
8KB

Download
memory/2088-57-0x00007FFEFA330000-0x00007FFEFADF1000-memory.dmp

Filesize
10.8MB

Download
memory/2088-58-0x00007FFEFA333000-0x00007FFEFA335000-memory.dmp

Filesize
8KB

Download
memory/2088-59-0x00007FFEFA330000-0x00007FFEFADF1000-memory.dmp

Filesize
10.8MB

Download
memory/2088-1-0x0000000000170000-0x0000000000188000-memory.dmp

Filesize
96KB

Download
memory/2316-52-0x000001E5559F0000-0x000001E555C0C000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads