xworm | e413b898bcf92f62736144346100f00a74904a13d94cfe4d2aef5aca31e1154e

Resubmissions

20/11/2024, 13:17

241120-qjj4vaxape 10

Analysis

max time kernel
147s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20/11/2024, 13:17

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General

Target

Chrome.exe
Size

197KB
MD5

f956d04fc1f44a110400e8aaf76fa48b
SHA1

8c8e7b049e81058dda63facc0aeb790f670be99e
SHA256

e413b898bcf92f62736144346100f00a74904a13d94cfe4d2aef5aca31e1154e
SHA512

95e5ca134e3479bde58a08567935ef8159b20dde7157bfeb81c23929ae7a89a15e699e1764c7dcea4d23cd254d27759f70af5c6b7e21c9d3358f9b4019539224
SSDEEP

3072:T4z/dMSbSzout45JpO5JMal9SXe4NpVq8BxFRzaqF+o2GQJ7/JzqVfGv9:T4Znb0out4n+/gVqwlL

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Temp%
install_file
Chrome.exe
pastebin_url
https://pastebin.com/raw/H3wFXmEi

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2624-1-0x0000000000DA0000-0x0000000000DD8000-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 opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Chrome.lnk	Chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Chrome.lnk	Chrome.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\Chrome = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Chrome.exe"	Chrome.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
6	pastebin.com
7	pastebin.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	ip-api.com

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
2688	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2624	Chrome.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2624	Chrome.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2624	Chrome.exe
Token: SeDebugPrivilege	2624	Chrome.exe
Token: SeDebugPrivilege	2132	Chrome.exe
Token: SeDebugPrivilege	2312	Chrome.exe
Token: SeDebugPrivilege	1348	Chrome.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2624	Chrome.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 2688	2624	Chrome.exe	31
PID 2624 wrote to memory of 2688	2624	Chrome.exe	31
PID 2624 wrote to memory of 2688	2624	Chrome.exe	31
PID 840 wrote to memory of 2132	840	taskeng.exe	35
PID 840 wrote to memory of 2132	840	taskeng.exe	35
PID 840 wrote to memory of 2132	840	taskeng.exe	35
PID 840 wrote to memory of 2312	840	taskeng.exe	36
PID 840 wrote to memory of 2312	840	taskeng.exe	36
PID 840 wrote to memory of 2312	840	taskeng.exe	36
PID 840 wrote to memory of 1348	840	taskeng.exe	37
PID 840 wrote to memory of 1348	840	taskeng.exe	37
PID 840 wrote to memory of 1348	840	taskeng.exe	37

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\Chrome.exe
"C:\Users\Admin\AppData\Local\Temp\Chrome.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Chrome" /tr "C:\Users\Admin\AppData\Local\Temp\Chrome.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2688

C:\Windows\system32\taskeng.exe
taskeng.exe {E946808A-E1CD-4EF4-86CF-124E539F4DFD} S-1-5-21-3533259084-2542256011-65585152-1000:XPAJOTIY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:840
- C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2132
- C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2312
- C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2624-0-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2624-1-0x0000000000DA0000-0x0000000000DD8000-memory.dmp

Filesize
224KB

Download
memory/2624-2-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2624-4-0x000007FEF5233000-0x000007FEF5234000-memory.dmp

Filesize
4KB

Download
memory/2624-5-0x000007FEF5230000-0x000007FEF5C1C000-memory.dmp

Filesize
9.9MB

Download