xworm | 7cd9183c01c3c913ea5ea3f0a9cfb0f9594bfae61e6582204786bc4d406614aa

General

Target

ChromeUpdate.exe
Size

238KB
MD5

bac16142016d690c8769d21668736653
SHA1

4b7c1ca4e7b8739c739980c0b830010a87ceff13
SHA256

7cd9183c01c3c913ea5ea3f0a9cfb0f9594bfae61e6582204786bc4d406614aa
SHA512

50659e8e0e05180ad0acb27b46cfbe7ccdbce8ba97f240b3e6c7e1084e8afaa0624fd1eff82b830c3eb25db45596f6a437bd0cd9ef9d2a3f83fb80f4d015437f
SSDEEP

6144:mDp5I4So24RJMMC1RK4/mUGGR5nvn/4eHZZ+cvlFq9yu6x8vTeVYNLjoqQkeDR2r:mDp5I4So24RJM11RK4/mUGGR5nvn/4eQ

Score

10^/10

Malware Config

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3452-1-0x00000000002D0000-0x0000000000312000-memory.dmp	family_xworm
behavioral2/files/0x000900000002a0d7-8.dat	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\ChromeUpdate.exe	ChromeUpdate.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ChromeUpdate.exe	ChromeUpdate.exe

Executes dropped EXE 3 IoCs

pid	Process
1968	ChromeUpdate.exe
1164	ChromeUpdate.exe
1028	ChromeUpdate.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-1-5-21-3517169085-2802914951-552339849-1000\Software\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\ChromeUpdate.exe"	ChromeUpdate.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
332	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3452	ChromeUpdate.exe
Token: SeDebugPrivilege	1968	ChromeUpdate.exe
Token: SeDebugPrivilege	1164	ChromeUpdate.exe
Token: SeDebugPrivilege	1028	ChromeUpdate.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3452 wrote to memory of 332	3452	ChromeUpdate.exe	82
PID 3452 wrote to memory of 332	3452	ChromeUpdate.exe	82

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\ChromeUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\ChromeUpdate.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3452
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "ChromeUpdate" /tr "C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:332

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1968

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1164

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1028

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\Local\Microsoft\CLR_v4.0\UsageLogs\ChromeUpdate.exe.log

Filesize
1KB

MD5
4a01567f513143419390cb40e6abaf71

SHA1
d0d714d6e526a652fc4e5de4e6040d6b0e7687ab

SHA256
6efaeb6a1b391155453a57c7e437575bb18efc174f3099d984d9dea49eecebad

SHA512
379fcb42d0f72d302482fadd4f25cbfa9c5f6a9c50222877d0eed91f237ec688eb52f65ee0d3fccfd017a6b14bd36f34fa0b77a388728fe3942a981322d7a4bc

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

Filesize
238KB

MD5
bac16142016d690c8769d21668736653

SHA1
4b7c1ca4e7b8739c739980c0b830010a87ceff13

SHA256
7cd9183c01c3c913ea5ea3f0a9cfb0f9594bfae61e6582204786bc4d406614aa

SHA512
50659e8e0e05180ad0acb27b46cfbe7ccdbce8ba97f240b3e6c7e1084e8afaa0624fd1eff82b830c3eb25db45596f6a437bd0cd9ef9d2a3f83fb80f4d015437f

Download Submit
memory/1968-10-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/1968-11-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/1968-13-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/3452-0-0x00007FF93BCB3000-0x00007FF93BCB5000-memory.dmp

Filesize
8KB

Download
memory/3452-1-0x00000000002D0000-0x0000000000312000-memory.dmp

Filesize
264KB

Download
memory/3452-2-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download
memory/3452-6-0x00007FF93BCB3000-0x00007FF93BCB5000-memory.dmp

Filesize
8KB

Download
memory/3452-7-0x00007FF93BCB0000-0x00007FF93C772000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads