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 2 IoCs

resource	yara_rule
behavioral2/memory/1468-1-0x0000000000F60000-0x0000000000F78000-memory.dmp	family_xworm
behavioral2/files/0x000e000000023b4a-8.dat	family_xworm

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

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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	XClient.exe

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
1220	Comet
4464	Comet
3248	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-1-5-21-1045960512-3948844814-3059691613-1000\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
2076	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1468	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1468	XClient.exe
Token: SeDebugPrivilege	1468	XClient.exe
Token: SeDebugPrivilege	1220	Comet
Token: SeDebugPrivilege	4464	Comet
Token: SeDebugPrivilege	3248	Comet

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1468	XClient.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1468 wrote to memory of 2076	1468	XClient.exe	94
PID 1468 wrote to memory of 2076	1468	XClient.exe	94

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⤵
- 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:1468
- 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:2076

C:\ProgramData\Comet
C:\ProgramData\Comet
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1220

C:\ProgramData\Comet
C:\ProgramData\Comet
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4464

C:\ProgramData\Comet
C:\ProgramData\Comet
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3248

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Comet

Filesize
74KB

MD5
e54502823034c0de90d4088727d05b26

SHA1
764f2284c3df4fccd722e1c8c70336eb32cd3f2b

SHA256
491d899f31864d337589eca674bc922e970e27ca872ce227c98caca207040cc9

SHA512
ba8dda1b2b23ebcced8c60c1fcd83162a31a8875320da2dc22855bde530a327a79105971073b7ebadd91bf00a237f0963b4786c1520b07c5d3d3aa7ee7f0b8f7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Comet.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
memory/1220-10-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/1220-12-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/1468-0-0x00007FFC7BC93000-0x00007FFC7BC95000-memory.dmp

Filesize
8KB

Download
memory/1468-1-0x0000000000F60000-0x0000000000F78000-memory.dmp

Filesize
96KB

Download
memory/1468-5-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/1468-6-0x00007FFC7BC93000-0x00007FFC7BC95000-memory.dmp

Filesize
8KB

Download
memory/1468-7-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads