xworm | d1029c3fa13d882ac717748fa973d8904840d8b81956979d965a8f3aa2921bbf

General

Target

nlcs2crcack.exe
Size

165KB
MD5

ccde94532dcba460b2d44773998c3021
SHA1

598c90a91be55aa76532245018e2e997503c32e0
SHA256

d1029c3fa13d882ac717748fa973d8904840d8b81956979d965a8f3aa2921bbf
SHA512

49211f29ddf8bb2cc059bff5f4090f876c9d4948bd5ba06ba5249aac3318ce29c7c11f4edf73f31f8c4760fe6e7dde323e0845faff9397014e3dd809c76db50b
SSDEEP

1536:bDIHj+5GGR9P5RtNOQLbUWw3VaHf9q6qSOCX8pazB4YiX:bDsjyGGTP55OQLbUWwI9OCX8gzB+X

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

its-definitely.gl.at.ply.gg:32735

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3292-1-0x0000000000990000-0x00000000009BE000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023c96-59.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
3200	powershell.exe
5004	powershell.exe
4744	powershell.exe
2080	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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	nlcs2crcack.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	nlcs2crcack.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	nlcs2crcack.exe

Executes dropped EXE 2 IoCs

pid	Process
4400	XClient.exe
1272	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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	nlcs2crcack.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
3260	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3200	powershell.exe
3200	powershell.exe
5004	powershell.exe
5004	powershell.exe
4744	powershell.exe
4744	powershell.exe
2080	powershell.exe
2080	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3292	nlcs2crcack.exe
Token: SeDebugPrivilege	3200	powershell.exe
Token: SeDebugPrivilege	5004	powershell.exe
Token: SeDebugPrivilege	4744	powershell.exe
Token: SeDebugPrivilege	2080	powershell.exe
Token: SeDebugPrivilege	3292	nlcs2crcack.exe
Token: SeDebugPrivilege	4400	XClient.exe
Token: SeDebugPrivilege	1272	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 3200	3292	nlcs2crcack.exe	83
PID 3292 wrote to memory of 3200	3292	nlcs2crcack.exe	83
PID 3292 wrote to memory of 5004	3292	nlcs2crcack.exe	85
PID 3292 wrote to memory of 5004	3292	nlcs2crcack.exe	85
PID 3292 wrote to memory of 4744	3292	nlcs2crcack.exe	89
PID 3292 wrote to memory of 4744	3292	nlcs2crcack.exe	89
PID 3292 wrote to memory of 2080	3292	nlcs2crcack.exe	91
PID 3292 wrote to memory of 2080	3292	nlcs2crcack.exe	91
PID 3292 wrote to memory of 3260	3292	nlcs2crcack.exe	94
PID 3292 wrote to memory of 3260	3292	nlcs2crcack.exe	94

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\nlcs2crcack.exe
"C:\Users\Admin\AppData\Local\Temp\nlcs2crcack.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292
- 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\nlcs2crcack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3200
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'nlcs2crcack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5004
- 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:4744
- 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:2080
- 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:3260

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4400

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1272

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
8a712aac4f8e841cc0464b6bc58cfeef

SHA1
11b9a76b9d4fa3044475711bd2e1df3dca33c9ff

SHA256
a2e81157d9054f70120f4aca077b1e76270f2709267b469180ad6cf7ff2b489c

SHA512
d91c2fc2b433177bf652d4ca2ee017df5974e1c93d0e6dc7840f70b126a2e67f4a66a13464f9968b857945175d08c56587455fd77f2d590a97c463599aee0fac

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

Filesize
944B

MD5
5dc0e0a4a9d9bf35484a9af707b74b45

SHA1
7cc1282f450ce5c3443dcd975d798b243028bdb2

SHA256
d1192f6149b6c2a72b7eaea1b7b7dda896b7c5c1fbd165f8f9c06afe7e6cce97

SHA512
90b024185d654d1e892f3ab58b861d36ab6f0b54293e554cfb101298a17d464b9e167f64b97bb55d55bd685981764646290c25afadfc7e7163c661c967381b64

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kqecdfrc.54s.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
165KB

MD5
ccde94532dcba460b2d44773998c3021

SHA1
598c90a91be55aa76532245018e2e997503c32e0

SHA256
d1029c3fa13d882ac717748fa973d8904840d8b81956979d965a8f3aa2921bbf

SHA512
49211f29ddf8bb2cc059bff5f4090f876c9d4948bd5ba06ba5249aac3318ce29c7c11f4edf73f31f8c4760fe6e7dde323e0845faff9397014e3dd809c76db50b

Download Submit
memory/3200-4-0x00007FFFD20B0000-0x00007FFFD2B71000-memory.dmp

Filesize
10.8MB

Download
memory/3200-18-0x00007FFFD20B0000-0x00007FFFD2B71000-memory.dmp

Filesize
10.8MB

Download
memory/3200-15-0x00000269F0380000-0x00000269F03A2000-memory.dmp

Filesize
136KB

Download
memory/3200-5-0x00007FFFD20B0000-0x00007FFFD2B71000-memory.dmp

Filesize
10.8MB

Download
memory/3200-3-0x00007FFFD20B0000-0x00007FFFD2B71000-memory.dmp

Filesize
10.8MB

Download
memory/3292-0-0x00007FFFD20B3000-0x00007FFFD20B5000-memory.dmp

Filesize
8KB

Download
memory/3292-54-0x00007FFFD20B3000-0x00007FFFD20B5000-memory.dmp

Filesize
8KB

Download
memory/3292-58-0x00007FFFD20B0000-0x00007FFFD2B71000-memory.dmp

Filesize
10.8MB

Download
memory/3292-2-0x00007FFFD20B0000-0x00007FFFD2B71000-memory.dmp

Filesize
10.8MB

Download
memory/3292-1-0x0000000000990000-0x00000000009BE000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads