xworm | a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462

General

Target

XClient.exe
Size

81KB
MD5

75c36e72847b9bc3cc674eac06c44565
SHA1

a42206858b46997eb8f702539ddfa77c300c82a9
SHA256

a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462
SHA512

5d9ec6a2af00a1e10836e433d85e0b1facef17548f96c2513317a2386a136fd86d2d8e951199ebca9093a1a36c457d2a04435d5ffca9a60c19f06cb241e55ca4
SSDEEP

1536:33/nZzjyT2tJkzLIUnBjUthHE9bAMz/NFbs6WrNykOy5RjsmY:fnMStJk3IMUE9bd7/bSDOyL1Y

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/sZpRUbiu
telegram
https://api.telegram.org/bot7704029346:AAHPre1lXQa0UfPCpOUXJZ9UXA9mFxvH4Gk/sendMessage?chat_id=7590668020

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2732-1-0x0000000000D40000-0x0000000000D5A000-memory.dmp	family_xworm
behavioral1/files/0x000d00000001225c-36.dat	family_xworm
behavioral1/memory/3000-38-0x00000000010F0000-0x000000000110A000-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
3052	powershell.exe
1160	powershell.exe
2728	powershell.exe
2152	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3000	security
2384	security

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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Roaming\\security"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 44 IoCs

Web Service

T1102

flow	ioc
32	pastebin.com
33	pastebin.com
35	pastebin.com
37	pastebin.com
7	pastebin.com
11	pastebin.com
15	pastebin.com
29	pastebin.com
47	pastebin.com
16	pastebin.com
20	pastebin.com
25	pastebin.com
39	pastebin.com
23	pastebin.com
26	pastebin.com
28	pastebin.com
36	pastebin.com
14	pastebin.com
17	pastebin.com
19	pastebin.com
22	pastebin.com
44	pastebin.com
40	pastebin.com
46	pastebin.com
5	pastebin.com
12	pastebin.com
13	pastebin.com
24	pastebin.com
41	pastebin.com
45	pastebin.com
8	pastebin.com
18	pastebin.com
30	pastebin.com
34	pastebin.com
43	pastebin.com
4	pastebin.com
6	pastebin.com
27	pastebin.com
38	pastebin.com
10	pastebin.com
42	pastebin.com
9	pastebin.com
21	pastebin.com
31	pastebin.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
2712	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2152	powershell.exe
3052	powershell.exe
1160	powershell.exe
2728	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2732	XClient.exe
Token: SeDebugPrivilege	2152	powershell.exe
Token: SeDebugPrivilege	3052	powershell.exe
Token: SeDebugPrivilege	1160	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeDebugPrivilege	3000	security
Token: SeDebugPrivilege	2384	security

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 2152	2732	XClient.exe	30
PID 2732 wrote to memory of 2152	2732	XClient.exe	30
PID 2732 wrote to memory of 2152	2732	XClient.exe	30
PID 2732 wrote to memory of 3052	2732	XClient.exe	32
PID 2732 wrote to memory of 3052	2732	XClient.exe	32
PID 2732 wrote to memory of 3052	2732	XClient.exe	32
PID 2732 wrote to memory of 1160	2732	XClient.exe	34
PID 2732 wrote to memory of 1160	2732	XClient.exe	34
PID 2732 wrote to memory of 1160	2732	XClient.exe	34
PID 2732 wrote to memory of 2728	2732	XClient.exe	36
PID 2732 wrote to memory of 2728	2732	XClient.exe	36
PID 2732 wrote to memory of 2728	2732	XClient.exe	36
PID 2732 wrote to memory of 2712	2732	XClient.exe	38
PID 2732 wrote to memory of 2712	2732	XClient.exe	38
PID 2732 wrote to memory of 2712	2732	XClient.exe	38
PID 2840 wrote to memory of 3000	2840	taskeng.exe	41
PID 2840 wrote to memory of 3000	2840	taskeng.exe	41
PID 2840 wrote to memory of 3000	2840	taskeng.exe	41
PID 2840 wrote to memory of 2384	2840	taskeng.exe	42
PID 2840 wrote to memory of 2384	2840	taskeng.exe	42
PID 2840 wrote to memory of 2384	2840	taskeng.exe	42

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2732
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2152
- 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:3052
- 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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1160
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2728
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "security" /tr "C:\Users\Admin\AppData\Roaming\security"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2712

C:\Windows\system32\taskeng.exe
taskeng.exe {256C1733-C31F-40F9-A226-E97D71AB324F} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2384

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
4d25a1c472d9874262f020e1a044f90d

SHA1
1592c30e319cabe3636fed104174e903756c3405

SHA256
42728aee2e1a55e8daf87e6e93ab8ebc2c83bedeb6de8fb27b554447120bde41

SHA512
3389ca0752137e118ef77458e61b085b5d42ceed3205cfab145af26870276ed5fb84aeb89905d8510ae213124da6323d91b81f443963bbd49d91098bca318089

Download Submit
C:\Users\Admin\AppData\Roaming\security

Filesize
81KB

MD5
75c36e72847b9bc3cc674eac06c44565

SHA1
a42206858b46997eb8f702539ddfa77c300c82a9

SHA256
a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462

SHA512
5d9ec6a2af00a1e10836e433d85e0b1facef17548f96c2513317a2386a136fd86d2d8e951199ebca9093a1a36c457d2a04435d5ffca9a60c19f06cb241e55ca4

Download Submit
memory/2152-6-0x0000000002A10000-0x0000000002A90000-memory.dmp

Filesize
512KB

Download
memory/2152-7-0x000000001B360000-0x000000001B642000-memory.dmp

Filesize
2.9MB

Download
memory/2152-8-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

Filesize
32KB

Download
memory/2732-28-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2732-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2732-32-0x000000001AD20000-0x000000001ADA0000-memory.dmp

Filesize
512KB

Download
memory/2732-33-0x000000001AD20000-0x000000001ADA0000-memory.dmp

Filesize
512KB

Download
memory/2732-1-0x0000000000D40000-0x0000000000D5A000-memory.dmp

Filesize
104KB

Download
memory/3000-38-0x00000000010F0000-0x000000000110A000-memory.dmp

Filesize
104KB

Download
memory/3052-15-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/3052-14-0x000000001B1A0000-0x000000001B482000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads