xworm | bf2a1a92ffd7238e9eb0c77acae216562e3eb01fec35a324a45e3fcb503dde29

General

Target

XBinder.exe
Size

820KB
MD5

90dcddcd355435afda38b6dad9ecd2fe
SHA1

2c2dda7074fe81c66567958a8c2d62cc48c49872
SHA256

bf2a1a92ffd7238e9eb0c77acae216562e3eb01fec35a324a45e3fcb503dde29
SHA512

6cf6237962f53322badd286991d3a5660691af0a8413a11e4200208830bc8c1a90da97c680d8808c97dd91ce33593f9774297089806a0bfea50531861735e249
SSDEEP

24576:9r/rjVJbC7vztZJIS002Kgp/nn6V9gDuBBYzu:57qx0ZnsiuLMu

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.22:7992

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000a00000001ab23-58.dat	family_xworm
behavioral2/memory/4192-62-0x0000000000F40000-0x0000000000F7E000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4964	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4192	winrar.exe
2972	XBinder v2.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\winrar = "C:\\Users\\Admin\\AppData\\Local\\Temp\\winrar.exe"	XBinder.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	winrar.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
1	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
96	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4964	powershell.exe
4964	powershell.exe
4964	powershell.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	4964	powershell.exe
Token: SeIncreaseQuotaPrivilege	4964	powershell.exe
Token: SeSecurityPrivilege	4964	powershell.exe
Token: SeTakeOwnershipPrivilege	4964	powershell.exe
Token: SeLoadDriverPrivilege	4964	powershell.exe
Token: SeSystemProfilePrivilege	4964	powershell.exe
Token: SeSystemtimePrivilege	4964	powershell.exe
Token: SeProfSingleProcessPrivilege	4964	powershell.exe
Token: SeIncBasePriorityPrivilege	4964	powershell.exe
Token: SeCreatePagefilePrivilege	4964	powershell.exe
Token: SeBackupPrivilege	4964	powershell.exe
Token: SeRestorePrivilege	4964	powershell.exe
Token: SeShutdownPrivilege	4964	powershell.exe
Token: SeDebugPrivilege	4964	powershell.exe
Token: SeSystemEnvironmentPrivilege	4964	powershell.exe
Token: SeRemoteShutdownPrivilege	4964	powershell.exe
Token: SeUndockPrivilege	4964	powershell.exe
Token: SeManageVolumePrivilege	4964	powershell.exe
Token: 33	4964	powershell.exe
Token: 34	4964	powershell.exe
Token: 35	4964	powershell.exe
Token: 36	4964	powershell.exe
Token: SeDebugPrivilege	4192	winrar.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 4964	2796	XBinder.exe	72
PID 2796 wrote to memory of 4964	2796	XBinder.exe	72
PID 2796 wrote to memory of 96	2796	XBinder.exe	75
PID 2796 wrote to memory of 96	2796	XBinder.exe	75
PID 2796 wrote to memory of 4192	2796	XBinder.exe	77
PID 2796 wrote to memory of 4192	2796	XBinder.exe	77
PID 2796 wrote to memory of 2972	2796	XBinder.exe	78
PID 2796 wrote to memory of 2972	2796	XBinder.exe	78

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\XBinder.exe
"C:\Users\Admin\AppData\Local\Temp\XBinder.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2796
- 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\winrar.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4964
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /F /TN "winrar" /SC ONLOGON /TR "C:\Users\Admin\AppData\Local\Temp\winrar.exe" /RL HIGHEST
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:96
- C:\Users\Admin\AppData\Local\Temp\winrar.exe
  "C:\Users\Admin\AppData\Local\Temp\winrar.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  PID:4192
- C:\Users\Admin\AppData\Local\Temp\XBinder v2.exe
  "C:\Users\Admin\AppData\Local\Temp\XBinder v2.exe"
  2⤵
  - Executes dropped EXE
  PID:2972

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\XBinder v2.exe

Filesize
3.5MB

MD5
a98358eb7f4953aa6d60015ccd8506ce

SHA1
d9be0c9d6d968c1baef11027a7ace6a0e869e75a

SHA256
21e0cc9ef715cc2147b9ec481b3fb876dbae8a4491367b478513128d7f7b8555

SHA512
62389e840c375a15d317d024d2e07b861b5b66447abb0423f603b73d2ec0853e3f947f78498a40dd835b48ca50562af9364c65c448a60172fa9011b6e564fac4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5ht4v3c3.rzv.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
C:\Users\Admin\AppData\Local\Temp\winrar.exe

Filesize
224KB

MD5
b8821aa050bb081e3ffe9d4f59b83cff

SHA1
a22a8a7806376f901b2fae8626c99afea6007bcc

SHA256
fbe7d57f6b706b47276707fcdaf995c9da5a429e3b173a49993c14fe71f423aa

SHA512
70b368c08eae455c5de6bf17218d565552dd438a5ab298138313312d0b6cb878e5794de3caab84e0d4fb01a1550848b6b2e298baf9e5fdc8d505579ced49ec25

Download Submit
memory/2796-55-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/2796-1-0x0000000000390000-0x0000000000462000-memory.dmp

Filesize
840KB

Download
memory/2796-0-0x00007FF884DD3000-0x00007FF884DD4000-memory.dmp

Filesize
4KB

Download
memory/2796-67-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-69-0x0000014498A30000-0x0000014498ACC000-memory.dmp

Filesize
624KB

Download
memory/2972-68-0x00000144FBFD0000-0x00000144FC35E000-memory.dmp

Filesize
3.6MB

Download
memory/4192-62-0x0000000000F40000-0x0000000000F7E000-memory.dmp

Filesize
248KB

Download
memory/4964-11-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/4964-52-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/4964-48-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/4964-25-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/4964-20-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/4964-10-0x0000020C7DEF0000-0x0000020C7DF66000-memory.dmp

Filesize
472KB

Download
memory/4964-9-0x00007FF884DD0000-0x00007FF8857BC000-memory.dmp

Filesize
9.9MB

Download
memory/4964-6-0x0000020C7DC00000-0x0000020C7DC22000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads