xworm | 491d899f31864d337589eca674bc922e970e27ca872ce227c98caca207040cc9

General

Target

XClient.exe
Size

74KB
MD5

e54502823034c0de90d4088727d05b26
SHA1

764f2284c3df4fccd722e1c8c70336eb32cd3f2b
SHA256

491d899f31864d337589eca674bc922e970e27ca872ce227c98caca207040cc9
SHA512

ba8dda1b2b23ebcced8c60c1fcd83162a31a8875320da2dc22855bde530a327a79105971073b7ebadd91bf00a237f0963b4786c1520b07c5d3d3aa7ee7f0b8f7
SSDEEP

1536:LZbBSfEJ9c4QBg7JtFxQs6+b5sMPzJQ3QVyt/O61p1db8:NbBSMJa4Qqli+byWJuOm/db8

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

books-royalty.gl.at.ply.gg:30157

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2992-1-0x0000000001270000-0x0000000001288000-memory.dmp	family_xworm
behavioral1/files/0x000a000000012263-9.dat	family_xworm
behavioral1/memory/2740-11-0x0000000000A80000-0x0000000000A98000-memory.dmp	family_xworm
behavioral1/memory/2912-14-0x0000000000E90000-0x0000000000EA8000-memory.dmp	family_xworm
behavioral1/memory/1888-16-0x0000000000130000-0x0000000000148000-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\Comet.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Comet.lnk	XClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2740	Comet
2912	Comet
1888	Comet

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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\Comet = "C:\\ProgramData\\Comet"	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
2156	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2992	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2992	XClient.exe
Token: SeDebugPrivilege	2992	XClient.exe
Token: SeDebugPrivilege	2740	Comet
Token: SeDebugPrivilege	2912	Comet
Token: SeDebugPrivilege	1888	Comet

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2992	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 2156	2992	XClient.exe	30
PID 2992 wrote to memory of 2156	2992	XClient.exe	30
PID 2992 wrote to memory of 2156	2992	XClient.exe	30
PID 2680 wrote to memory of 2740	2680	taskeng.exe	33
PID 2680 wrote to memory of 2740	2680	taskeng.exe	33
PID 2680 wrote to memory of 2740	2680	taskeng.exe	33
PID 2680 wrote to memory of 2912	2680	taskeng.exe	35
PID 2680 wrote to memory of 2912	2680	taskeng.exe	35
PID 2680 wrote to memory of 2912	2680	taskeng.exe	35
PID 2680 wrote to memory of 1888	2680	taskeng.exe	36
PID 2680 wrote to memory of 1888	2680	taskeng.exe	36
PID 2680 wrote to memory of 1888	2680	taskeng.exe	36

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:2992
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Comet" /tr "C:\ProgramData\Comet"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2156

C:\Windows\system32\taskeng.exe
taskeng.exe {16E6298A-EAC9-4B1D-AC1A-106D75C0C6B2} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2680
- C:\ProgramData\Comet
  C:\ProgramData\Comet
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2740
- C:\ProgramData\Comet
  C:\ProgramData\Comet
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2912
- C:\ProgramData\Comet
  C:\ProgramData\Comet
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1888

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:\ProgramData\Comet

Filesize
74KB

MD5
e54502823034c0de90d4088727d05b26

SHA1
764f2284c3df4fccd722e1c8c70336eb32cd3f2b

SHA256
491d899f31864d337589eca674bc922e970e27ca872ce227c98caca207040cc9

SHA512
ba8dda1b2b23ebcced8c60c1fcd83162a31a8875320da2dc22855bde530a327a79105971073b7ebadd91bf00a237f0963b4786c1520b07c5d3d3aa7ee7f0b8f7

Download Submit
memory/1888-16-0x0000000000130000-0x0000000000148000-memory.dmp

Filesize
96KB

Download
memory/2740-11-0x0000000000A80000-0x0000000000A98000-memory.dmp

Filesize
96KB

Download
memory/2912-14-0x0000000000E90000-0x0000000000EA8000-memory.dmp

Filesize
96KB

Download
memory/2992-0-0x000007FEF53F3000-0x000007FEF53F4000-memory.dmp

Filesize
4KB

Download
memory/2992-1-0x0000000001270000-0x0000000001288000-memory.dmp

Filesize
96KB

Download
memory/2992-5-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2992-6-0x000007FEF53F3000-0x000007FEF53F4000-memory.dmp

Filesize
4KB

Download
memory/2992-7-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads