xworm | 91ed4f07c3e5b2e0c7b5f00f003debc9adafe2cc5127fad969f4a309c85f0d8d

General

Target

341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe
Size

182KB
MD5

90b363f21821b35934eced9bd7ce2963
SHA1

55f5f5b97145f5dd5b420c4294e34a1187e0851d
SHA256

341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640
SHA512

6ec69a5120469c446c834850b9eaf0c3210aa4bbe6a378cbd04b864902104ceb1744ca86be8843a2fd9d4f433916a89dd9e84fa84f95bfe3a24b28e384bedc34
SSDEEP

3072:XVaZlZe/bV0eLdro+bhr/n5fKOAVkl4NpVq8BxFRzaqF+o2GQJ7/JzqVfGvy:ueddlbhnNlgVqwlL

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

84.38.132.25:7771

Attributes

Install_directory
%AppData%
install_file
ChromeHandler.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/864-1-0x0000000000F30000-0x0000000000F64000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023420-9.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ChromeHandler.lnk	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ChromeHandler.lnk	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe

Executes dropped EXE 2 IoCs

pid	Process
4928	ChromeHandler.exe
4736	ChromeHandler.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-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ChromeHandler = "C:\\Users\\Admin\\AppData\\Roaming\\ChromeHandler.exe"	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.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
868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
864	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	864	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe
Token: SeDebugPrivilege	864	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe
Token: SeDebugPrivilege	4928	ChromeHandler.exe
Token: SeDebugPrivilege	4736	ChromeHandler.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
864	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 868	864	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe	91
PID 864 wrote to memory of 868	864	341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe	91

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\341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.exe
"C:\Users\Admin\AppData\Local\Temp\341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640.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:864
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "ChromeHandler" /tr "C:\Users\Admin\AppData\Roaming\ChromeHandler.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:868

C:\Users\Admin\AppData\Roaming\ChromeHandler.exe
C:\Users\Admin\AppData\Roaming\ChromeHandler.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4928

C:\Users\Admin\AppData\Roaming\ChromeHandler.exe
C:\Users\Admin\AppData\Roaming\ChromeHandler.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4736

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\ChromeHandler.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\ChromeHandler.exe

Filesize
182KB

MD5
90b363f21821b35934eced9bd7ce2963

SHA1
55f5f5b97145f5dd5b420c4294e34a1187e0851d

SHA256
341d213ffb340627b485a9d3b23d21464e95fc2bb437441559bf9173ce942640

SHA512
6ec69a5120469c446c834850b9eaf0c3210aa4bbe6a378cbd04b864902104ceb1744ca86be8843a2fd9d4f433916a89dd9e84fa84f95bfe3a24b28e384bedc34

Download Submit
memory/864-0-0x00007FFAA3FE3000-0x00007FFAA3FE5000-memory.dmp

Filesize
8KB

Download
memory/864-1-0x0000000000F30000-0x0000000000F64000-memory.dmp

Filesize
208KB

Download
memory/864-6-0x00007FFAA3FE0000-0x00007FFAA4AA1000-memory.dmp

Filesize
10.8MB

Download
memory/864-7-0x00007FFAA3FE3000-0x00007FFAA3FE5000-memory.dmp

Filesize
8KB

Download
memory/864-8-0x00007FFAA3FE0000-0x00007FFAA4AA1000-memory.dmp

Filesize
10.8MB

Download
memory/4928-11-0x00007FFAA3FE0000-0x00007FFAA4AA1000-memory.dmp

Filesize
10.8MB

Download
memory/4928-13-0x00007FFAA3FE0000-0x00007FFAA4AA1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads