xworm | 1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819

General

Target

1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe
Size

76KB
MD5

a927f83cacb60970c88a430034a3fc79
SHA1

965ff343c6948d8956b6b448939d1336291e98dd
SHA256

1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819
SHA512

dec45c5e8e50ff960b52511b93fa67a04cbe317d8ad58d3b4f4bfe3ff88a372fdbbf46f226ae8ecea1469457ae6f42e4a6b9b0c8c91e9d6dbd212741ac44af85
SSDEEP

1536:2+GNlhXTATqWAXYj69qhHNbnz8gq5HDM6EquckOteutq1:2pNjzWiYjGqhHNbnHhOteuU1

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

185.84.161.13:7000

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4720-1-0x0000000000060000-0x000000000007A000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023c94-61.dat	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
3048	powershell.exe
4232	powershell.exe
3344	powershell.exe
1912	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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe

Executes dropped EXE 2 IoCs

pid	Process
4328	XClient.exe
1420	XClient.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.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
14	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
5084	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3048	powershell.exe
3048	powershell.exe
4232	powershell.exe
4232	powershell.exe
3344	powershell.exe
3344	powershell.exe
1912	powershell.exe
1912	powershell.exe
4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe
Token: SeDebugPrivilege	3048	powershell.exe
Token: SeDebugPrivilege	4232	powershell.exe
Token: SeDebugPrivilege	3344	powershell.exe
Token: SeDebugPrivilege	1912	powershell.exe
Token: SeDebugPrivilege	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe
Token: SeDebugPrivilege	4328	XClient.exe
Token: SeDebugPrivilege	1420	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4720 wrote to memory of 3048	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	83
PID 4720 wrote to memory of 3048	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	83
PID 4720 wrote to memory of 4232	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	85
PID 4720 wrote to memory of 4232	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	85
PID 4720 wrote to memory of 3344	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	87
PID 4720 wrote to memory of 3344	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	87
PID 4720 wrote to memory of 1912	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	89
PID 4720 wrote to memory of 1912	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	89
PID 4720 wrote to memory of 5084	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	93
PID 4720 wrote to memory of 5084	4720	1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe	93

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\1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe
"C:\Users\Admin\AppData\Local\Temp\1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.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:4720
- 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\1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3048
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4232
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3344
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1912
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5084

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4328

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1420

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\XClient.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
96e3b86880fedd5afc001d108732a3e5

SHA1
8fc17b39d744a9590a6d5897012da5e6757439a3

SHA256
c3077e4cadb4ed246c02abe55aa6cf832fee4c2546b7addb7d22cd1c7c8c1294

SHA512
909b1968f7204fa7029109b02232d8cc5438f6b4dc7c9044e4e47c59fcee538199b13029e36592b12ed573d48a308dd4822d2ced4129ab08d4111897e02be55d

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

Filesize
944B

MD5
e58749a7a1826f6ea62df1e2ef63a32b

SHA1
c0bca21658b8be4f37b71eec9578bfefa44f862d

SHA256
0e1f0e684adb40a5d0668df5fed007c9046137d7ae16a1f2f343b139d5f9bc93

SHA512
4cf45b2b11ab31e7f67fff286b29d50ed28cd6043091144c5c0f1348b5f5916ed7479cf985595e6f096b586ab93b4b5dce612f688049b8366a2dd91863e98b70

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fdggivil.lx0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
76KB

MD5
a927f83cacb60970c88a430034a3fc79

SHA1
965ff343c6948d8956b6b448939d1336291e98dd

SHA256
1ca58d727de394ef886ada13679714989c168b8719c2021f0065aa5f3532a819

SHA512
dec45c5e8e50ff960b52511b93fa67a04cbe317d8ad58d3b4f4bfe3ff88a372fdbbf46f226ae8ecea1469457ae6f42e4a6b9b0c8c91e9d6dbd212741ac44af85

Download Submit
memory/3048-18-0x00007FF87A7F0000-0x00007FF87B2B1000-memory.dmp

Filesize
10.8MB

Download
memory/3048-15-0x00007FF87A7F0000-0x00007FF87B2B1000-memory.dmp

Filesize
10.8MB

Download
memory/3048-14-0x00007FF87A7F0000-0x00007FF87B2B1000-memory.dmp

Filesize
10.8MB

Download
memory/3048-13-0x00007FF87A7F0000-0x00007FF87B2B1000-memory.dmp

Filesize
10.8MB

Download
memory/3048-8-0x00000146C0EF0000-0x00000146C0F12000-memory.dmp

Filesize
136KB

Download
memory/4720-0-0x00007FF87A7F3000-0x00007FF87A7F5000-memory.dmp

Filesize
8KB

Download
memory/4720-41-0x00007FF87A7F3000-0x00007FF87A7F5000-memory.dmp

Filesize
8KB

Download
memory/4720-58-0x00007FF87A7F0000-0x00007FF87B2B1000-memory.dmp

Filesize
10.8MB

Download
memory/4720-59-0x0000000000950000-0x000000000095C000-memory.dmp

Filesize
48KB

Download
memory/4720-2-0x00007FF87A7F0000-0x00007FF87B2B1000-memory.dmp

Filesize
10.8MB

Download
memory/4720-1-0x0000000000060000-0x000000000007A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads