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
behavioral1/memory/216-1-0x0000000000280000-0x00000000002C2000-memory.dmp	family_xworm
behavioral1/files/0x000b000000027db6-5.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-1-5-21-983685854-559653692-675906587-1000\Control Panel\International\Geo\Nation	ChromeUpdate.exe

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
1028	ChromeUpdate.exe
2928	ChromeUpdate.exe
5416	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-1-5-21-983685854-559653692-675906587-1000\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
4140	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	216	ChromeUpdate.exe
Token: SeDebugPrivilege	1028	ChromeUpdate.exe
Token: SeDebugPrivilege	2928	ChromeUpdate.exe
Token: SeDebugPrivilege	5416	ChromeUpdate.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 216 wrote to memory of 4140	216	ChromeUpdate.exe	80
PID 216 wrote to memory of 4140	216	ChromeUpdate.exe	80

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⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:216
- 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:4140

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

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2928

C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5416

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

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Downloads

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

Filesize
1KB

MD5
4eaa2e98bba9aac1a63e8da5c8bec637

SHA1
b04113b0031395540bbd18c28164d9d121bad772

SHA256
f0bcbce1bc0f8a30ffef1376bcf0d3ac64a05de55a7025362540515e59dd4ecd

SHA512
0196f3848fde8914d736225cea523636e467539c8824ed1ed5629e74cfacb0e9f9da70b1c0e338aee77b389d4587cbab4f5f961d4c255228c16945b03ecfd24d

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

Filesize
238KB

MD5
bac16142016d690c8769d21668736653

SHA1
4b7c1ca4e7b8739c739980c0b830010a87ceff13

SHA256
7cd9183c01c3c913ea5ea3f0a9cfb0f9594bfae61e6582204786bc4d406614aa

SHA512
50659e8e0e05180ad0acb27b46cfbe7ccdbce8ba97f240b3e6c7e1084e8afaa0624fd1eff82b830c3eb25db45596f6a437bd0cd9ef9d2a3f83fb80f4d015437f

Download Submit
memory/216-0-0x00007FF904213000-0x00007FF904215000-memory.dmp

Filesize
8KB

Download
memory/216-1-0x0000000000280000-0x00000000002C2000-memory.dmp

Filesize
264KB

Download
memory/216-2-0x00007FF904210000-0x00007FF904CD2000-memory.dmp

Filesize
10.8MB

Download
memory/216-3-0x00007FF904213000-0x00007FF904215000-memory.dmp

Filesize
8KB

Download
memory/216-4-0x00007FF904210000-0x00007FF904CD2000-memory.dmp

Filesize
10.8MB

Download
memory/1028-6-0x00007FF904210000-0x00007FF904CD2000-memory.dmp

Filesize
10.8MB

Download
memory/1028-7-0x00007FF904210000-0x00007FF904CD2000-memory.dmp

Filesize
10.8MB

Download
memory/1028-9-0x00007FF904210000-0x00007FF904CD2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads