xworm | e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

General

Target

XClient (1).exe
Size

41KB
MD5

8ac12cc24b5ac76188fe9612dc51777e
SHA1

0c0dddf34dbf7b95e82c58fdb7cfabb80db90430
SHA256

e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654
SHA512

02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93
SSDEEP

768:LrJDweBDuOkScrbsN/x6WECAr43MkfJF5Pa9p+U6iOwhF3/ibK:pDwewicrbsN/YDRr4RF49IU6iOwv6G

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

57.128.132.221:7000

Mutex

A0pVR4huor1J3yZ3

Attributes

Install_directory
%AppData%
install_file
Win32runtime.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/3452-1-0x00000000005E0000-0x00000000005F0000-memory.dmp	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
2540	powershell.exe
3068	powershell.exe
4520	powershell.exe
824	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	XClient (1).exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win32runtime = "C:\\Users\\Admin\\AppData\\Roaming\\Win32runtime.exe"	XClient (1).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
13	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4192	timeout.exe

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
3220	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2540	powershell.exe
2540	powershell.exe
3068	powershell.exe
3068	powershell.exe
4520	powershell.exe
4520	powershell.exe
824	powershell.exe
824	powershell.exe
3452	XClient (1).exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3452	XClient (1).exe
Token: SeDebugPrivilege	2540	powershell.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	4520	powershell.exe
Token: SeDebugPrivilege	824	powershell.exe
Token: SeDebugPrivilege	3452	XClient (1).exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3452	XClient (1).exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3452 wrote to memory of 2540	3452	XClient (1).exe	87
PID 3452 wrote to memory of 2540	3452	XClient (1).exe	87
PID 3452 wrote to memory of 3068	3452	XClient (1).exe	89
PID 3452 wrote to memory of 3068	3452	XClient (1).exe	89
PID 3452 wrote to memory of 4520	3452	XClient (1).exe	91
PID 3452 wrote to memory of 4520	3452	XClient (1).exe	91
PID 3452 wrote to memory of 824	3452	XClient (1).exe	93
PID 3452 wrote to memory of 824	3452	XClient (1).exe	93
PID 3452 wrote to memory of 3220	3452	XClient (1).exe	95
PID 3452 wrote to memory of 3220	3452	XClient (1).exe	95
PID 3452 wrote to memory of 4828	3452	XClient (1).exe	110
PID 3452 wrote to memory of 4828	3452	XClient (1).exe	110
PID 3452 wrote to memory of 4896	3452	XClient (1).exe	112
PID 3452 wrote to memory of 4896	3452	XClient (1).exe	112
PID 4896 wrote to memory of 4192	4896	cmd.exe	114
PID 4896 wrote to memory of 4192	4896	cmd.exe	114

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 (1).exe
"C:\Users\Admin\AppData\Local\Temp\XClient (1).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:3452
- 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 (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2540
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3068
- 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\Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4520
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:824
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Win32runtime" /tr "C:\Users\Admin\AppData\Roaming\Win32runtime.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3220
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "Win32runtime"
  2⤵
  PID:4828
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp52B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4896
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4192

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\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
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_r0ond5ow.e2z.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp52B.tmp.bat

Filesize
162B

MD5
b2efa0b33afbc177af9eafdf186cf200

SHA1
e5d1f412a1f4d7c2020b992d58a6bdd7068c3019

SHA256
86c385e6c035972fb6db9dcebbc19777cf84acae0aeb9a5d2f005340a4db2bef

SHA512
52f3c0c5cfc8d433941ddbf0effc0b45883402bb6926940b4acfcbeb6268d0a05ca5e30ccce32a5b4dc5e0b88d3a40d08b94ae53d77224282303475c667c8b0b

Download Submit
memory/2540-13-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/2540-15-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/2540-18-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/2540-14-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/2540-8-0x00000229787B0000-0x00000229787D2000-memory.dmp

Filesize
136KB

Download
memory/3452-0-0x00007FFE236D3000-0x00007FFE236D5000-memory.dmp

Filesize
8KB

Download
memory/3452-2-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/3452-57-0x00007FFE236D3000-0x00007FFE236D5000-memory.dmp

Filesize
8KB

Download
memory/3452-58-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/3452-65-0x00007FFE236D0000-0x00007FFE24191000-memory.dmp

Filesize
10.8MB

Download
memory/3452-1-0x00000000005E0000-0x00000000005F0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads