xworm | 4922578003441503e4c9aa0be3473df1bc15edd756d55413313597da47192226

General

Target

XwsadwasClient.exe
Size

41KB
MD5

e575f0b2f9ae9fad0708194974763a75
SHA1

2667a29bfbabbf294cf174a974a5697c2169eb97
SHA256

4922578003441503e4c9aa0be3473df1bc15edd756d55413313597da47192226
SHA512

296cf49462fc03391cc0c223e766f3945cc2496a1c342ae8dff4437a527a2169a91dbd0c746bcbe4308f6c742e940135ff9c7b10b90f9d99072ab1d2b7b512d9
SSDEEP

768:3tAMOC0RGU2L7CAr43MxfJF5Pa9p+Ng6iOwhr3/ib7:3/l0RGNvRrNRF49I66iOwdaH

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.19:33365

147.185.221.19:2137:33365

Mutex

tccRidU0e2eHax6f

Attributes

Install_directory
%AppData%
install_file
Wiindows Update.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1820-0-0x00000000000B0000-0x00000000000C0000-memory.dmp	family_xworm
behavioral1/files/0x000f000000023424-59.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
3360	powershell.exe
4312	powershell.exe
1772	powershell.exe
888	powershell.exe

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-1-5-21-2636447293-1148739154-93880854-1000\Control Panel\International\Geo\Nation	XwsadwasClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2452	Wiindows Update.exe
2892	Wiindows Update.exe
412	Wiindows Update.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-1-5-21-2636447293-1148739154-93880854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wiindows Update = "C:\\Users\\Admin\\AppData\\Roaming\\Wiindows Update.exe"	XwsadwasClient.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
19	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
3548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3360	powershell.exe
3360	powershell.exe
4312	powershell.exe
4312	powershell.exe
1772	powershell.exe
1772	powershell.exe
888	powershell.exe
888	powershell.exe
1820	XwsadwasClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1820	XwsadwasClient.exe
Token: SeDebugPrivilege	3360	powershell.exe
Token: SeDebugPrivilege	4312	powershell.exe
Token: SeDebugPrivilege	1772	powershell.exe
Token: SeDebugPrivilege	888	powershell.exe
Token: SeDebugPrivilege	1820	XwsadwasClient.exe
Token: SeDebugPrivilege	2452	Wiindows Update.exe
Token: SeDebugPrivilege	2892	Wiindows Update.exe
Token: SeDebugPrivilege	412	Wiindows Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1820	XwsadwasClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 3360	1820	XwsadwasClient.exe	92
PID 1820 wrote to memory of 3360	1820	XwsadwasClient.exe	92
PID 1820 wrote to memory of 4312	1820	XwsadwasClient.exe	94
PID 1820 wrote to memory of 4312	1820	XwsadwasClient.exe	94
PID 1820 wrote to memory of 1772	1820	XwsadwasClient.exe	96
PID 1820 wrote to memory of 1772	1820	XwsadwasClient.exe	96
PID 1820 wrote to memory of 888	1820	XwsadwasClient.exe	98
PID 1820 wrote to memory of 888	1820	XwsadwasClient.exe	98
PID 1820 wrote to memory of 3548	1820	XwsadwasClient.exe	100
PID 1820 wrote to memory of 3548	1820	XwsadwasClient.exe	100

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\XwsadwasClient.exe
"C:\Users\Admin\AppData\Local\Temp\XwsadwasClient.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:1820
- 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\XwsadwasClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3360
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XwsadwasClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4312
- 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\Wiindows Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Wiindows Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:888
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Wiindows Update" /tr "C:\Users\Admin\AppData\Roaming\Wiindows Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3548

C:\Users\Admin\AppData\Roaming\Wiindows Update.exe
"C:\Users\Admin\AppData\Roaming\Wiindows Update.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2452

C:\Users\Admin\AppData\Roaming\Wiindows Update.exe
"C:\Users\Admin\AppData\Roaming\Wiindows Update.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2892

C:\Users\Admin\AppData\Roaming\Wiindows Update.exe
"C:\Users\Admin\AppData\Roaming\Wiindows Update.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:412

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Wiindows Update.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
0256bd284691ed0fc502ef3c8a7e58dc

SHA1
dcdf69dc8ca8bf068f65d20ef1563bbe283e2413

SHA256
e2fb83098e114084f51ed7187334f861ce670051046c39f338928296ca9a49cf

SHA512
c5b29c1e0a15ddb68b0579848066774fa7cdc6f35087bbbf47c05a5c0dcc1eb3e61b2ddadfbded8c1ed9820e637596a9f08a97db8fb18000d168e6b159060c42

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

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lcrzp2ce.2p2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Wiindows Update.exe

Filesize
41KB

MD5
e575f0b2f9ae9fad0708194974763a75

SHA1
2667a29bfbabbf294cf174a974a5697c2169eb97

SHA256
4922578003441503e4c9aa0be3473df1bc15edd756d55413313597da47192226

SHA512
296cf49462fc03391cc0c223e766f3945cc2496a1c342ae8dff4437a527a2169a91dbd0c746bcbe4308f6c742e940135ff9c7b10b90f9d99072ab1d2b7b512d9

Download Submit
memory/1820-0-0x00000000000B0000-0x00000000000C0000-memory.dmp

Filesize
64KB

Download
memory/1820-2-0x00007FFC0C640000-0x00007FFC0D101000-memory.dmp

Filesize
10.8MB

Download
memory/1820-57-0x00007FFC0C643000-0x00007FFC0C645000-memory.dmp

Filesize
8KB

Download
memory/1820-58-0x00007FFC0C640000-0x00007FFC0D101000-memory.dmp

Filesize
10.8MB

Download
memory/1820-1-0x00007FFC0C643000-0x00007FFC0C645000-memory.dmp

Filesize
8KB

Download
memory/3360-14-0x00007FFC0C640000-0x00007FFC0D101000-memory.dmp

Filesize
10.8MB

Download
memory/3360-15-0x00007FFC0C640000-0x00007FFC0D101000-memory.dmp

Filesize
10.8MB

Download
memory/3360-18-0x00007FFC0C640000-0x00007FFC0D101000-memory.dmp

Filesize
10.8MB

Download
memory/3360-13-0x00007FFC0C640000-0x00007FFC0D101000-memory.dmp

Filesize
10.8MB

Download
memory/3360-8-0x0000022CF4100000-0x0000022CF4122000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads