xworm | e131f44ff3131bd01316cc0d99a0f36c3116adab6f0354ade58678a644c736bb

General

Target

AC 3.exe
Size

90KB
MD5

676fbfb0698d8105b708e7fc902ec3ff
SHA1

1077cc7de056b570a2e117880884fddd8dcd5023
SHA256

e131f44ff3131bd01316cc0d99a0f36c3116adab6f0354ade58678a644c736bb
SHA512

0e052dfb608231b39a072f38ac169d6efafaac48b21101af13f5b2ac3b341ee83f5d7a50a36a598f01e2220b4799f00167a897487bc9db68badf27479743a07c
SSDEEP

1536:z3W5cwWRxDRuqJLOR4hvIFw9bdX0fT2to3/03JzTN6msCOlMe+DE56:z97DYsYAvGw9bdS2c/05z+COlb+Dc6

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

artist-forum.gl.at.ply.gg:38847

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1552-0-0x0000000000F80000-0x0000000000F9C000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\XClient.exe	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
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

Processes:

AC 3.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation AC 3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	AC 3.exe

Drops startup file 2 IoCs

Processes:

AC 3.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	AC 3.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	AC 3.exe

Executes dropped EXE 2 IoCs

Processes:

XClient.exeXClient.exe

pid process

928 XClient.exe
2668 XClient.exe

pid	process
928	XClient.exe
2668	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

AC 3.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	AC 3.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.

Processes:

flow ioc

4 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

4300 schtasks.exe

flow	ioc
4	ip-api.com

pid	process
4300	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeAC 3.exe

pid	process
2656	powershell.exe
2656	powershell.exe
3044	powershell.exe
3044	powershell.exe
4124	powershell.exe
4124	powershell.exe
1980	powershell.exe
1980	powershell.exe
1552	AC 3.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

AC 3.exepowershell.exepowershell.exepowershell.exepowershell.exeXClient.exeXClient.exe

description	pid	process
Token: SeDebugPrivilege	1552	AC 3.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeDebugPrivilege	4124	powershell.exe
Token: SeDebugPrivilege	1980	powershell.exe
Token: SeDebugPrivilege	1552	AC 3.exe
Token: SeDebugPrivilege	928	XClient.exe
Token: SeDebugPrivilege	2668	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

AC 3.exe

pid process

1552 AC 3.exe

pid	process
1552	AC 3.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

AC 3.exe

description	pid	process	target process
PID 1552 wrote to memory of 2656	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 2656	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 3044	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 3044	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 4124	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 4124	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 1980	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 1980	1552	AC 3.exe	powershell.exe
PID 1552 wrote to memory of 4300	1552	AC 3.exe	schtasks.exe
PID 1552 wrote to memory of 4300	1552	AC 3.exe	schtasks.exe

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\AC 3.exe
"C:\Users\Admin\AppData\Local\Temp\AC 3.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:1552
- 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\AC 3.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2656
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'AC 3.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3044
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4124
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1980
- 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⤵
  - Creates scheduled task(s)
  PID:4300

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:928

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

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

Replay Monitor

Loading Replay Monitor...

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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

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

Filesize
944B

MD5
10fb30dc297f99d6ebafa5fee8b24fa2

SHA1
76904509313a49a765edcde26b69c3a61f9fa225

SHA256
567bcacac120711fc04bf8e6c8cd0bff7b61e8ee0a6316254d1005ebb1264e6a

SHA512
c42ace1ea0923fa55592f4f486a508ea56997fdbe0200016b0fc16a33452fc28e4530129a315b3b3a5ede37a07097c13a0eb310c9e91e5d97bb7ce7b955b9498

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uxbam201.1o0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
90KB

MD5
676fbfb0698d8105b708e7fc902ec3ff

SHA1
1077cc7de056b570a2e117880884fddd8dcd5023

SHA256
e131f44ff3131bd01316cc0d99a0f36c3116adab6f0354ade58678a644c736bb

SHA512
0e052dfb608231b39a072f38ac169d6efafaac48b21101af13f5b2ac3b341ee83f5d7a50a36a598f01e2220b4799f00167a897487bc9db68badf27479743a07c

Download Submit
memory/1552-0-0x0000000000F80000-0x0000000000F9C000-memory.dmp

Filesize
112KB

Download
memory/1552-2-0x000000001BD80000-0x000000001BD90000-memory.dmp

Filesize
64KB

Download
memory/1552-57-0x00007FFC6E870000-0x00007FFC6F331000-memory.dmp

Filesize
10.8MB

Download
memory/1552-58-0x000000001BD80000-0x000000001BD90000-memory.dmp

Filesize
64KB

Download
memory/1552-1-0x00007FFC6E870000-0x00007FFC6F331000-memory.dmp

Filesize
10.8MB

Download
memory/2656-13-0x00007FFC6E870000-0x00007FFC6F331000-memory.dmp

Filesize
10.8MB

Download
memory/2656-15-0x000001DC3FD10000-0x000001DC3FD20000-memory.dmp

Filesize
64KB

Download
memory/2656-18-0x00007FFC6E870000-0x00007FFC6F331000-memory.dmp

Filesize
10.8MB

Download
memory/2656-14-0x000001DC3FD10000-0x000001DC3FD20000-memory.dmp

Filesize
64KB

Download
memory/2656-8-0x000001DC5A4C0000-0x000001DC5A4E2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads