xworm | 5303b9bf032715221bd01d3c22fc7e3503865f6cf75045066d9499258f965217

Analysis

max time kernel
1187s
max time network
1199s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16-04-2024 21:22

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General

Target

payload_decrypted_decompressed.exe
Size

75KB
MD5

3de04cf3ce246c720f473e72a15db602
SHA1

fcc658446bff0c0ae233312c8a4e5d27d6fdd40e
SHA256

5303b9bf032715221bd01d3c22fc7e3503865f6cf75045066d9499258f965217
SHA512

6a28a958182e280b7770476265c5bda7a4925b2a6bda0fc51c1729a2395627f20097ef1d7b595ea0de6c88f50955efa746adde8f91a0713dd94465a6885853c6
SSDEEP

1536:fb8gDcNQHrwsKfFeqTvgsm3VW/QQeaNWU1b9n2RefakLOyImhR4DkRG:fbbFsdJToH3VW0akEb92RefRLOyI0nG

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

147.185.221.18:28789

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000470000-0x000000000048A000-memory.dmp	family_xworm
behavioral2/files/0x0009000000023408-8.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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	payload_decrypted_decompressed.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 20 IoCs

pid	Process
4360	WindowsBIOS
4924	WindowsBIOS
860	WindowsBIOS
3548	WindowsBIOS
4500	WindowsBIOS
4220	WindowsBIOS
4364	WindowsBIOS
3424	WindowsBIOS
2300	WindowsBIOS
4212	WindowsBIOS
3620	WindowsBIOS
2856	WindowsBIOS
3164	WindowsBIOS
1968	WindowsBIOS
4344	WindowsBIOS
388	WindowsBIOS
3444	WindowsBIOS
4212	WindowsBIOS
1936	WindowsBIOS
1864	WindowsBIOS

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-1-5-21-1826666146-2574340311-1877551059-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsBIOS = "C:\\ProgramData\\WindowsBIOS"	payload_decrypted_decompressed.exe

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
9	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2448	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4064	payload_decrypted_decompressed.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	payload_decrypted_decompressed.exe
Token: SeDebugPrivilege	4064	payload_decrypted_decompressed.exe
Token: SeDebugPrivilege	4360	WindowsBIOS
Token: SeDebugPrivilege	4924	WindowsBIOS
Token: SeDebugPrivilege	860	WindowsBIOS
Token: SeDebugPrivilege	3548	WindowsBIOS
Token: SeDebugPrivilege	4500	WindowsBIOS
Token: SeDebugPrivilege	4220	WindowsBIOS
Token: SeDebugPrivilege	4364	WindowsBIOS
Token: SeDebugPrivilege	3424	WindowsBIOS
Token: SeDebugPrivilege	2300	WindowsBIOS
Token: SeDebugPrivilege	4212	WindowsBIOS
Token: SeDebugPrivilege	3620	WindowsBIOS
Token: SeDebugPrivilege	2856	WindowsBIOS
Token: SeDebugPrivilege	3164	WindowsBIOS
Token: SeDebugPrivilege	1968	WindowsBIOS
Token: SeDebugPrivilege	4344	WindowsBIOS
Token: SeDebugPrivilege	388	WindowsBIOS
Token: SeDebugPrivilege	3444	WindowsBIOS
Token: SeDebugPrivilege	4212	WindowsBIOS
Token: SeDebugPrivilege	1936	WindowsBIOS
Token: SeDebugPrivilege	1864	WindowsBIOS

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4064	payload_decrypted_decompressed.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 2448	4064	payload_decrypted_decompressed.exe	86
PID 4064 wrote to memory of 2448	4064	payload_decrypted_decompressed.exe	86

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\payload_decrypted_decompressed.exe
"C:\Users\Admin\AppData\Local\Temp\payload_decrypted_decompressed.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:4064
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WindowsBIOS" /tr "C:\ProgramData\WindowsBIOS"
  2⤵
  - Creates scheduled task(s)
  PID:2448

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4360

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4924

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:860

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3548

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4500

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4220

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4364

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3424

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2300

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4212

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3620

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2856

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3164

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1968

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4344

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:388

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3444

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4212

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1936

C:\ProgramData\WindowsBIOS
C:\ProgramData\WindowsBIOS
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\WindowsBIOS

Filesize
75KB

MD5
3de04cf3ce246c720f473e72a15db602

SHA1
fcc658446bff0c0ae233312c8a4e5d27d6fdd40e

SHA256
5303b9bf032715221bd01d3c22fc7e3503865f6cf75045066d9499258f965217

SHA512
6a28a958182e280b7770476265c5bda7a4925b2a6bda0fc51c1729a2395627f20097ef1d7b595ea0de6c88f50955efa746adde8f91a0713dd94465a6885853c6

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\WindowsBIOS.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
memory/388-59-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/388-58-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/860-19-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/860-20-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/1864-71-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/1864-70-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/1936-68-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/1936-67-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/1968-52-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/1968-53-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/2300-38-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/2300-37-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/2856-47-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/2856-46-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3164-50-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3164-49-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3424-34-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3424-35-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3444-62-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3444-61-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3548-23-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3548-22-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3620-43-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/3620-44-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4064-7-0x0000000000DB0000-0x0000000000DC0000-memory.dmp

Filesize
64KB

Download
memory/4064-0-0x0000000000470000-0x000000000048A000-memory.dmp

Filesize
104KB

Download
memory/4064-6-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4064-2-0x0000000000DB0000-0x0000000000DC0000-memory.dmp

Filesize
64KB

Download
memory/4064-1-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4212-40-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4212-41-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4212-65-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4212-64-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4220-29-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4220-28-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4344-55-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4344-56-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4360-10-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4360-12-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4364-32-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4364-31-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4500-26-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4500-25-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4924-17-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download
memory/4924-16-0x00007FFF89ED0000-0x00007FFF8A991000-memory.dmp

Filesize
10.8MB

Download