xworm | 0b6f399b1b5e976944d903b553343fa00c0af1dacecfcb161b7018c3282c8c8d

General

Target

Sukioshe.API.bat
Size

102KB
MD5

378a551aa3a4c5e0adec167eaa224b24
SHA1

0f55fd5a8bae0149321975f44599314ca96d954d
SHA256

0b6f399b1b5e976944d903b553343fa00c0af1dacecfcb161b7018c3282c8c8d
SHA512

a291af2e59ac3db474a6139b6ce2d672d6c556a61bc7ec0360e32565d93c5a1d8c71b7306826232fb78749b6b0a72787763b7ca94e2cda38b0afbcb9ab0e890e
SSDEEP

1536:y1YNBiAGQ4g3JGPFSutTsn5zr73oWiA6WwprhyIha1CjRAoH28oKN34rmeeS3BQe:Hf0Qn3CFSutIHwp9yJCj+oWC45eWKe

Score

10^/10

xworm defense_evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

45.88.91.101:7000

Attributes

Install_directory
%AppData%
install_file
win32.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x0009000000018be7-5.dat	family_xworm
behavioral1/memory/1684-7-0x00000000000F0000-0x0000000000108000-memory.dmp	family_xworm
behavioral1/memory/1336-42-0x0000000000300000-0x0000000000318000-memory.dmp	family_xworm
behavioral1/memory/960-45-0x0000000000180000-0x0000000000198000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1280	powershell.exe
2144	powershell.exe
2852	powershell.exe
2872	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win32.lnk	embedded.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win32.lnk	embedded.exe

Executes dropped EXE 3 IoCs

pid	Process
1684	embedded.exe
1336	win32.exe
960	win32.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\win32 = "C:\\Users\\Admin\\AppData\\Roaming\\win32.exe"	embedded.exe

Deobfuscate/Decode Files or Information 1 TTPs 1 IoCs

Payload decoded via CertUtil.

defense_evasion

Deobfuscate/Decode Files or Information

T1140

pid	Process
2000	certutil.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
3060	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2144	powershell.exe
2852	powershell.exe
2872	powershell.exe
1280	powershell.exe
1684	embedded.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1684	embedded.exe
Token: SeDebugPrivilege	2144	powershell.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	1280	powershell.exe
Token: SeDebugPrivilege	1684	embedded.exe
Token: SeDebugPrivilege	1336	win32.exe
Token: SeDebugPrivilege	960	win32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1684	embedded.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2156 wrote to memory of 2000	2156	cmd.exe	31
PID 2156 wrote to memory of 2000	2156	cmd.exe	31
PID 2156 wrote to memory of 2000	2156	cmd.exe	31
PID 2156 wrote to memory of 1684	2156	cmd.exe	32
PID 2156 wrote to memory of 1684	2156	cmd.exe	32
PID 2156 wrote to memory of 1684	2156	cmd.exe	32
PID 1684 wrote to memory of 2144	1684	embedded.exe	33
PID 1684 wrote to memory of 2144	1684	embedded.exe	33
PID 1684 wrote to memory of 2144	1684	embedded.exe	33
PID 1684 wrote to memory of 2852	1684	embedded.exe	35
PID 1684 wrote to memory of 2852	1684	embedded.exe	35
PID 1684 wrote to memory of 2852	1684	embedded.exe	35
PID 1684 wrote to memory of 2872	1684	embedded.exe	37
PID 1684 wrote to memory of 2872	1684	embedded.exe	37
PID 1684 wrote to memory of 2872	1684	embedded.exe	37
PID 1684 wrote to memory of 1280	1684	embedded.exe	39
PID 1684 wrote to memory of 1280	1684	embedded.exe	39
PID 1684 wrote to memory of 1280	1684	embedded.exe	39
PID 1684 wrote to memory of 3060	1684	embedded.exe	41
PID 1684 wrote to memory of 3060	1684	embedded.exe	41
PID 1684 wrote to memory of 3060	1684	embedded.exe	41
PID 1920 wrote to memory of 1336	1920	taskeng.exe	45
PID 1920 wrote to memory of 1336	1920	taskeng.exe	45
PID 1920 wrote to memory of 1336	1920	taskeng.exe	45
PID 1920 wrote to memory of 960	1920	taskeng.exe	46
PID 1920 wrote to memory of 960	1920	taskeng.exe	46
PID 1920 wrote to memory of 960	1920	taskeng.exe	46

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:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Sukioshe.API.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2156
- C:\Windows\system32\certutil.exe
  certutil -decode "C:\Users\Admin\AppData\Local\Temp\embedded.b64" "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
  2⤵
  - Deobfuscate/Decode Files or Information
  PID:2000
- C:\Users\Admin\AppData\Local\Temp\embedded.exe
  "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1684
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\embedded.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2144
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'embedded.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2852
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\win32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2872
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'win32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1280
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "win32" /tr "C:\Users\Admin\AppData\Roaming\win32.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3060

C:\Windows\system32\taskeng.exe
taskeng.exe {3A331748-AB2F-45B1-93A7-24D5B24AAB62} S-1-5-21-3063565911-2056067323-3330884624-1000:KHBTHJFA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Users\Admin\AppData\Roaming\win32.exe
  C:\Users\Admin\AppData\Roaming\win32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1336
- C:\Users\Admin\AppData\Roaming\win32.exe
  C:\Users\Admin\AppData\Roaming\win32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

Deobfuscate/Decode Files or Information

Modify Registry

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\Temp\embedded.b64

Filesize
93KB

MD5
1295e2412bafad04d40296c30e863a57

SHA1
510bd48bb534ed067c4173c3f101652b97d70c81

SHA256
940c1d404fb9824f5c2f549098c99e4001fd8dd60ca47ea2d7d9aeff9654f533

SHA512
51fb977c758466d08d53875e0eecde03b98015b98843756975739019d4e0b5ed2b632f56b2d719bd4f53c9aeb6576315f910079a1a20876ed7279b6bef80f18c

Download Submit
C:\Users\Admin\AppData\Local\Temp\embedded.exe

Filesize
69KB

MD5
6ce124f705bb296be16f329d0e4be099

SHA1
f7c01f22ecbfae4e6f2c297c29770b52d2db3ad9

SHA256
43c7837200a3d03c1de24f2be3d7ea78921296c01dcd74177dfb1b8a0e505440

SHA512
48cad8c2494b021c81d8549c53a1ab015195081afe90c781a6bda56dbcd9242035dd634ec08579ae73ad0bac8a2e383c3eeee94f5cd629f8111a638d05f4067a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
a5bc344343b284279de382e0f307e0ff

SHA1
3c7708dd5e103c1957a63bcbb0c18bbfd6a13b75

SHA256
6efbf9ec17e650aee25a883eb044a59c1123b89c32173df43fb318a1d7674b6b

SHA512
698c23e3caed627c08d56b6b78fded3c9a6dbd5335c02bf06ccbf36012d7b767495e5206327e7e563d83abfb8c1be0daf7a441dc0fade60c4c6b0dc31558fd3d

Download Submit
memory/960-45-0x0000000000180000-0x0000000000198000-memory.dmp

Filesize
96KB

Download
memory/1336-42-0x0000000000300000-0x0000000000318000-memory.dmp

Filesize
96KB

Download
memory/1684-7-0x00000000000F0000-0x0000000000108000-memory.dmp

Filesize
96KB

Download
memory/1684-6-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/1684-36-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1684-37-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/1684-38-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2144-12-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2144-13-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2852-19-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2852-20-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads