xworm | 6e552c8d82a2553ec83fea57d340561834aeac22ae30d6a81692f2eee6651e14

General

Target

loader.exe
Size

61KB
MD5

427cae9ddc40f9a7ea51459fc265d9be
SHA1

8c68b6be3529637908878e64a020dd99c3bf98ad
SHA256

4a1a9976a6fc9351ce34db0c601952328f52b526894cea614b51879c065e89a4
SHA512

da5d985814986580a53712df240dad2dd876a16aeebab7e89ddc9968a8d2305dbf1cb695e1fa812ac534f27f1dfabf1be8aedac1f07d1b311163843f905a47a1
SSDEEP

1536:SAXBcwCcPCxLgk2BeVbcqbhc48Ulk36nJNOOKLj:SAyvcPCaJe9Pbhc0hcOKLj

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

submit-processing.gl.at.ply.gg:54034

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral6/memory/4276-1-0x0000000000330000-0x0000000000346000-memory.dmp	family_xworm
behavioral6/files/0x000500000001e7c2-58.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
4948	powershell.exe
3040	powershell.exe
2508	powershell.exe
1956	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-1-5-21-2753856825-3907105642-1818461144-1000\Control Panel\International\Geo\Nation	loader.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1888	XClient.exe
4204	XClient.exe
4052	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-1-5-21-2753856825-3907105642-1818461144-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	loader.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
13	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
1788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4948	powershell.exe
4948	powershell.exe
3040	powershell.exe
3040	powershell.exe
2508	powershell.exe
2508	powershell.exe
1956	powershell.exe
1956	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	4276	loader.exe
Token: SeDebugPrivilege	4948	powershell.exe
Token: SeDebugPrivilege	3040	powershell.exe
Token: SeDebugPrivilege	2508	powershell.exe
Token: SeDebugPrivilege	1956	powershell.exe
Token: SeDebugPrivilege	4276	loader.exe
Token: SeDebugPrivilege	1888	XClient.exe
Token: SeDebugPrivilege	4204	XClient.exe
Token: SeDebugPrivilege	4052	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4276 wrote to memory of 4948	4276	loader.exe	87
PID 4276 wrote to memory of 4948	4276	loader.exe	87
PID 4276 wrote to memory of 3040	4276	loader.exe	89
PID 4276 wrote to memory of 3040	4276	loader.exe	89
PID 4276 wrote to memory of 2508	4276	loader.exe	91
PID 4276 wrote to memory of 2508	4276	loader.exe	91
PID 4276 wrote to memory of 1956	4276	loader.exe	93
PID 4276 wrote to memory of 1956	4276	loader.exe	93
PID 4276 wrote to memory of 1788	4276	loader.exe	95
PID 4276 wrote to memory of 1788	4276	loader.exe	95

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\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4276
- 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\loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3040
- 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:2508
- 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:1956
- 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:1788

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1888

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4204

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4052

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
8f659389c6e21eb0c627fbae833500c7

SHA1
ae632f1e4af08587934ff168155b30e2b28d7475

SHA256
a12763453f79453dd8f25f0c90d001ffb5d409ec698491666c9f076c6bc60d8c

SHA512
f4849e0b1d6ab3d4dd054f590a359af8dd1b9d3df2ad78033ad1a59ebafb1ca96aa76fa9061a466d74e8e3266dc882818d79db47908b21ca3ef8be20e427d327

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_tv1uluni.1sp.psm1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
61KB

MD5
427cae9ddc40f9a7ea51459fc265d9be

SHA1
8c68b6be3529637908878e64a020dd99c3bf98ad

SHA256
4a1a9976a6fc9351ce34db0c601952328f52b526894cea614b51879c065e89a4

SHA512
da5d985814986580a53712df240dad2dd876a16aeebab7e89ddc9968a8d2305dbf1cb695e1fa812ac534f27f1dfabf1be8aedac1f07d1b311163843f905a47a1

Download Submit
memory/4276-0-0x00007FFEC0233000-0x00007FFEC0235000-memory.dmp

Filesize
8KB

Download
memory/4276-2-0x00007FFEC0230000-0x00007FFEC0CF1000-memory.dmp

Filesize
10.8MB

Download
memory/4276-60-0x00007FFEC0233000-0x00007FFEC0235000-memory.dmp

Filesize
8KB

Download
memory/4276-61-0x00007FFEC0230000-0x00007FFEC0CF1000-memory.dmp

Filesize
10.8MB

Download
memory/4276-1-0x0000000000330000-0x0000000000346000-memory.dmp

Filesize
88KB

Download
memory/4948-14-0x00007FFEC0230000-0x00007FFEC0CF1000-memory.dmp

Filesize
10.8MB

Download
memory/4948-15-0x00007FFEC0230000-0x00007FFEC0CF1000-memory.dmp

Filesize
10.8MB

Download
memory/4948-18-0x00007FFEC0230000-0x00007FFEC0CF1000-memory.dmp

Filesize
10.8MB

Download
memory/4948-9-0x0000023268B10000-0x0000023268B32000-memory.dmp

Filesize
136KB

Download
memory/4948-3-0x00007FFEC0230000-0x00007FFEC0CF1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads