xworm | e73c96538ec60c2117b6ed82b7f95f8894abed022ee9ab03c1be90ebd9722f06

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
09-12-2024 23:08

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General

Target

winlogoc.exe
Size

72KB
MD5

33fba80c2580eebf95e25dea03331f68
SHA1

d0ed67fbbff537eb393206fc41c18d59b9a4bb3c
SHA256

4cbe94aefe8a24ebac9fb5c11c1efc89c15b1a7b1a2bf3587baface318ee4b2b
SHA512

8213c45c68a38984a2ad11ab0651ae9933dc538ff260e31753f2f9c3aacff038048bcf2680bb7993b5f4005f48ae7e5c74e7325bdf6ef20df1ae7aa58f7ae4bc
SSDEEP

1536:UzF1OeqsJlPPf/TpX0bOc2yu/n+77QOI3taVwi4y:yFBibOL/nSsOI3tR5y

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

SLL.casacam.net:4444

Attributes

Install_directory
%LocalAppData%
install_file
Interrupi.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral11/memory/2252-1-0x0000000000250000-0x0000000000268000-memory.dmp	family_xworm
behavioral11/files/0x000c00000001226d-10.dat	family_xworm
behavioral11/memory/2780-12-0x0000000000A40000-0x0000000000A58000-memory.dmp	family_xworm
behavioral11/memory/2584-15-0x0000000000D70000-0x0000000000D88000-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 created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Interrupi.lnk	winlogoc.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Interrupi.lnk	winlogoc.exe

Executes dropped EXE 3 IoCs

pid	Process
2780	Interrupi.exe
2584	Interrupi.exe
940	Interrupi.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Interrupi = "C:\\Users\\Admin\\AppData\\Local\\Interrupi.exe"	winlogoc.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
2532	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2252	winlogoc.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	winlogoc.exe
Token: SeDebugPrivilege	2252	winlogoc.exe
Token: SeDebugPrivilege	2780	Interrupi.exe
Token: SeDebugPrivilege	2584	Interrupi.exe
Token: SeDebugPrivilege	940	Interrupi.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2532	2252	winlogoc.exe	30
PID 2252 wrote to memory of 2532	2252	winlogoc.exe	30
PID 2252 wrote to memory of 2532	2252	winlogoc.exe	30
PID 2636 wrote to memory of 2780	2636	taskeng.exe	35
PID 2636 wrote to memory of 2780	2636	taskeng.exe	35
PID 2636 wrote to memory of 2780	2636	taskeng.exe	35
PID 2636 wrote to memory of 2584	2636	taskeng.exe	36
PID 2636 wrote to memory of 2584	2636	taskeng.exe	36
PID 2636 wrote to memory of 2584	2636	taskeng.exe	36
PID 2636 wrote to memory of 940	2636	taskeng.exe	37
PID 2636 wrote to memory of 940	2636	taskeng.exe	37
PID 2636 wrote to memory of 940	2636	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\winlogoc.exe
"C:\Users\Admin\AppData\Local\Temp\winlogoc.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Interrupi" /tr "C:\Users\Admin\AppData\Local\Interrupi.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2532

C:\Windows\system32\taskeng.exe
taskeng.exe {FB3B4262-60D4-41F0-9E4C-F4DEA59C19DA} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Users\Admin\AppData\Local\Interrupi.exe
  C:\Users\Admin\AppData\Local\Interrupi.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2780
- C:\Users\Admin\AppData\Local\Interrupi.exe
  C:\Users\Admin\AppData\Local\Interrupi.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Users\Admin\AppData\Local\Interrupi.exe
  C:\Users\Admin\AppData\Local\Interrupi.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:940

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Interrupi.exe

Filesize
72KB

MD5
33fba80c2580eebf95e25dea03331f68

SHA1
d0ed67fbbff537eb393206fc41c18d59b9a4bb3c

SHA256
4cbe94aefe8a24ebac9fb5c11c1efc89c15b1a7b1a2bf3587baface318ee4b2b

SHA512
8213c45c68a38984a2ad11ab0651ae9933dc538ff260e31753f2f9c3aacff038048bcf2680bb7993b5f4005f48ae7e5c74e7325bdf6ef20df1ae7aa58f7ae4bc

Download Submit
memory/2252-0-0x000007FEF50B3000-0x000007FEF50B4000-memory.dmp

Filesize
4KB

Download
memory/2252-1-0x0000000000250000-0x0000000000268000-memory.dmp

Filesize
96KB

Download
memory/2252-6-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-7-0x000007FEF50B3000-0x000007FEF50B4000-memory.dmp

Filesize
4KB

Download
memory/2252-8-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2584-15-0x0000000000D70000-0x0000000000D88000-memory.dmp

Filesize
96KB

Download
memory/2780-12-0x0000000000A40000-0x0000000000A58000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads