xworm | 45e0996bc0c167dc427891ecc287d98cab9a5157ec74803c8873c435067f42f7

General

Target

dsad.bat
Size

122KB
MD5

966f3ad6d9f5ad03afbef0a7917cbede
SHA1

5c62ed021daefb494d236017d5cd5110928942a0
SHA256

45e0996bc0c167dc427891ecc287d98cab9a5157ec74803c8873c435067f42f7
SHA512

0774869e64b20dbfa503a65b3c40b0e1ef15cfba16078a9526da7bacf46a69636be2bf52dc20ee6f502d59dabd76ddf6a088ce85e931b20f4e9094017a7821ae
SSDEEP

3072:PX5WdgyknI18fbSRFmj53iT4GgV/POVuAQDXiriToJl0:PX557y+bz53iKOV9QDYi0Jl0

Score

10^/10

xworm defense_evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

left-noon.gl.at.ply.gg:60705

Attributes

Install_directory
%AppData%
install_file
US11B.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x001900000002aafa-160.dat	family_xworm
behavioral1/memory/1276-162-0x0000000000BB0000-0x0000000000BCA000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4836	powershell.exe
5020	powershell.exe
3104	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sms5D04.lnk	sms5D04.tmp
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sms5D04.lnk	sms5D04.tmp

Executes dropped EXE 2 IoCs

pid	Process
5008	bdzyqzk78j.exe
1276	sms5D04.tmp

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-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Run\sms5D04 = "C:\\Users\\Admin\\AppData\\Roaming\\sms5D04.tmp"	sms5D04.tmp

Deobfuscate/Decode Files or Information 1 TTPs 1 IoCs

Payload decoded via CertUtil.

defense_evasion

Deobfuscate/Decode Files or Information

T1140

pid	Process
4600	certutil.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
1	ip-api.com

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings	OpenWith.exe

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
1304	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3104	powershell.exe
3104	powershell.exe
4836	powershell.exe
4836	powershell.exe
5020	powershell.exe
5020	powershell.exe
1276	sms5D04.tmp

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1276	sms5D04.tmp
Token: SeDebugPrivilege	3104	powershell.exe
Token: SeDebugPrivilege	4836	powershell.exe
Token: SeDebugPrivilege	5020	powershell.exe
Token: SeDebugPrivilege	1276	sms5D04.tmp

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1276	sms5D04.tmp
1464	OpenWith.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 4600	3164	cmd.exe	78
PID 3164 wrote to memory of 4600	3164	cmd.exe	78
PID 3164 wrote to memory of 5008	3164	cmd.exe	79
PID 3164 wrote to memory of 5008	3164	cmd.exe	79
PID 5008 wrote to memory of 1276	5008	bdzyqzk78j.exe	81
PID 5008 wrote to memory of 1276	5008	bdzyqzk78j.exe	81
PID 1276 wrote to memory of 3104	1276	sms5D04.tmp	83
PID 1276 wrote to memory of 3104	1276	sms5D04.tmp	83
PID 1276 wrote to memory of 4836	1276	sms5D04.tmp	85
PID 1276 wrote to memory of 4836	1276	sms5D04.tmp	85
PID 1276 wrote to memory of 5020	1276	sms5D04.tmp	87
PID 1276 wrote to memory of 5020	1276	sms5D04.tmp	87
PID 1276 wrote to memory of 1304	1276	sms5D04.tmp	89
PID 1276 wrote to memory of 1304	1276	sms5D04.tmp	89

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
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\dsad.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\system32\certutil.exe
  certutil -decode C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.txt C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.exe
  2⤵
  - Deobfuscate/Decode Files or Information
  PID:4600
- C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.exe
  C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:5008
- - C:\Users\Admin\AppData\Local\Temp\sms5D04.tmp
    "C:\Users\Admin\AppData\Local\Temp\sms5D04.tmp"
    3⤵
    - 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:1276
  - - 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\sms5D04.tmp'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3104
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sms5D04.tmp'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4836
  - - 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\sms5D04.tmp'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5020
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "sms5D04" /tr "C:\Users\Admin\AppData\Roaming\sms5D04.tmp"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1304

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
1⤵
PID:1336

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe "C:\Users\Admin\AppData\Roaming\sms5D04.tmp"
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1464

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
21017c68eaf9461301de459f4f07e888

SHA1
41ff30fc8446508d4c3407c79e798cf6eaa5bb73

SHA256
03b321e48ff3328d9c230308914961fe110c4c7bc96c0a85a296745437bcb888

SHA512
956990c11c6c1baa3665ef7ef23ef6073e0a7fcff77a93b5e605a83ff1e60b916d80d45dafb06977aed90868a273569a865cf2c623e295b5157bfff0fb2be35d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3thrmyw2.hgf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.exe

Filesize
89KB

MD5
c708b4e6749fe2bea4c7a6881f2d21fc

SHA1
1264556923d27d0266a1a34a305c9c5deded08c0

SHA256
4454446918edc9730718e4ce610986706f14b03c0c2c1cb2eab6d774ef73d581

SHA512
6886a023e040edeafdc59c07bbcf1b97329e9dbe63b098ef16004dcc5b5a9644e431221cf9b37b4612f1ac14d548b0df1c538f998e44ba8f93a8a10cbeffef44

Download Submit
C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.txt

Filesize
119KB

MD5
7f70cd0d872ebbfc9917850c310ca541

SHA1
cd957a542f30964e8943550ce52b07b2ffcb5676

SHA256
70a42df8f7ea2080973d351d99324be090bfb58b91d6d708313828a7a3d2e53a

SHA512
c96e9726d34dee24c734e81af7e35cf8153aa853d91890dbe8e6311e9019886c39bfa7a6da86f78d7c20ac0ed1e509906bd572abb3def986d7ef8272d8305b7a

Download Submit
C:\Users\Admin\AppData\Local\Temp\bdzyqzk78j.txt

Filesize
7KB

MD5
62f0045a3133367c21b17f3b71579fa7

SHA1
20f1fa70407b6ca8033eea474e3ddbd99267497f

SHA256
5f7ea73166179fce0372fd66af291abaa25f67affcf4e5bc41eb248905c88ef8

SHA512
4a457bef7fb05a289ea088dd34132065f1d45b117450b6fbfc766b9b10d708f9d2a3fec30477e5172e49cf0714ff3be4743f48831ba50cb8a8c74af7b94b9e2c

Download Submit
C:\Users\Admin\AppData\Local\Temp\sms5D04.tmp

Filesize
76KB

MD5
c01f551edc26c87f9060358f75bf227d

SHA1
3755e4043a98bbe6efff60f2442c29373049052a

SHA256
6f588a5b0a111fb296e01c7633b65c3904acb094feafced2c8f174e7d3013c1f

SHA512
dc919d689b4965f8df64d63f64bb289bd82bee2a2ca273835d55765e8bd69046b130fa931efad54e46de4bd5508503e6d3fb3d2fa6e493dbf88787b56de0770a

Download Submit
memory/1276-161-0x00007FFE74F73000-0x00007FFE74F75000-memory.dmp

Filesize
8KB

Download
memory/1276-163-0x00007FFE74F70000-0x00007FFE75A32000-memory.dmp

Filesize
10.8MB

Download
memory/1276-162-0x0000000000BB0000-0x0000000000BCA000-memory.dmp

Filesize
104KB

Download
memory/1276-203-0x00007FFE74F73000-0x00007FFE74F75000-memory.dmp

Filesize
8KB

Download
memory/1276-204-0x00007FFE74F70000-0x00007FFE75A32000-memory.dmp

Filesize
10.8MB

Download
memory/1276-205-0x000000001C540000-0x000000001C54C000-memory.dmp

Filesize
48KB

Download
memory/3104-172-0x000001AC5CC90000-0x000001AC5CCB2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads