xworm | 7c2910c7548a6fd1fe7eeacb7c24105a7049b670f1de0f5dbbe718e1d3cd3c70

General

Target

XClient.exe
Size

39KB
MD5

bc66e4663ecc5fe2d5c1ffb6399e828a
SHA1

95ef4b4ebecde00da0a3c6630a3556fb19b46a1a
SHA256

7c2910c7548a6fd1fe7eeacb7c24105a7049b670f1de0f5dbbe718e1d3cd3c70
SHA512

1334e5d14e5f85a2dbead8b566e5e78748b857e25da313a544699d6d5fcbf400d70619c41f3e1d56cd57006002f8a4ba8c7a21002fd6412dae54470087cca0d9
SSDEEP

768:Lz6nA3MxG5g8y5AcksKyJjL77FWPa9X2OwhAaG8r:/6nUuf5A72Fv9X2Ow6T8r

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:2068

Mutex

6oJ1GSe3avoqc597

Attributes

Install_directory
%AppData%
install_file
FileExplorer.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2496-1-0x0000000001260000-0x0000000001270000-memory.dmp	family_xworm
behavioral1/files/0x000c000000012263-10.dat	family_xworm
behavioral1/memory/2604-12-0x0000000000210000-0x0000000000220000-memory.dmp	family_xworm
behavioral1/memory/1892-15-0x0000000000DC0000-0x0000000000DD0000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2604	FileExplorer.exe
1892	FileExplorer.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\FileExplorer = "C:\\Users\\Admin\\AppData\\Roaming\\FileExplorer.exe"	XClient.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
2948	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2496	XClient.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2496	XClient.exe
Token: SeDebugPrivilege	2496	XClient.exe
Token: SeDebugPrivilege	2604	FileExplorer.exe
Token: SeDebugPrivilege	1892	FileExplorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2496	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 2948	2496	XClient.exe	30
PID 2496 wrote to memory of 2948	2496	XClient.exe	30
PID 2496 wrote to memory of 2948	2496	XClient.exe	30
PID 2692 wrote to memory of 2604	2692	taskeng.exe	34
PID 2692 wrote to memory of 2604	2692	taskeng.exe	34
PID 2692 wrote to memory of 2604	2692	taskeng.exe	34
PID 2692 wrote to memory of 1892	2692	taskeng.exe	35
PID 2692 wrote to memory of 1892	2692	taskeng.exe	35
PID 2692 wrote to memory of 1892	2692	taskeng.exe	35

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.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- 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:2496
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FileExplorer" /tr "C:\Users\Admin\AppData\Roaming\FileExplorer.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2948

C:\Windows\system32\taskeng.exe
taskeng.exe {A8580B7C-7E55-4D0D-807F-6FE2F0B8CF35} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2604
- C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  C:\Users\Admin\AppData\Roaming\FileExplorer.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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Downloads

C:\Users\Admin\AppData\Roaming\FileExplorer.exe

Filesize
39KB

MD5
bc66e4663ecc5fe2d5c1ffb6399e828a

SHA1
95ef4b4ebecde00da0a3c6630a3556fb19b46a1a

SHA256
7c2910c7548a6fd1fe7eeacb7c24105a7049b670f1de0f5dbbe718e1d3cd3c70

SHA512
1334e5d14e5f85a2dbead8b566e5e78748b857e25da313a544699d6d5fcbf400d70619c41f3e1d56cd57006002f8a4ba8c7a21002fd6412dae54470087cca0d9

Download Submit
memory/1892-15-0x0000000000DC0000-0x0000000000DD0000-memory.dmp

Filesize
64KB

Download
memory/2496-0-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2496-1-0x0000000001260000-0x0000000001270000-memory.dmp

Filesize
64KB

Download
memory/2496-6-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2496-7-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2496-8-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2604-12-0x0000000000210000-0x0000000000220000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads