xworm | 8e81cad20a55301586d986a1d15c9e822f807453e1dec2e9a5c82af59167a8f7

General

Target

aimwhere_steam_module.exe
Size

78KB
MD5

f200833ce65e1dc078cec47227c0fd19
SHA1

6676c2ab005e976245f646e9d8255f383b9d8a74
SHA256

8e81cad20a55301586d986a1d15c9e822f807453e1dec2e9a5c82af59167a8f7
SHA512

3c3588671d53b0d316fd4460915466686ca083bba69cba165f55da49f9e1f94c1d89c3041a3d71c5cc66a78144f26c20554d8878c8bc43c6f4b10f2beea057dd
SSDEEP

1536:Ma7N2sxomcA2cfcCsPruA6mvFNHbw78jl0ZQ0h1m6m3rcMOl4KJ:4LcECKrupkjbwgMQ0SXOiO

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:4040

Attributes

Install_directory
%Temp%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4440-1-0x0000000000B50000-0x0000000000B6A000-memory.dmp	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
1388	powershell.exe
3472	powershell.exe
1196	powershell.exe
4408	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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	aimwhere_steam_module.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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\Temp\\XClient.exe"	aimwhere_steam_module.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

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1388	powershell.exe
1388	powershell.exe
3472	powershell.exe
3472	powershell.exe
1196	powershell.exe
1196	powershell.exe
4408	powershell.exe
4408	powershell.exe
4440	aimwhere_steam_module.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4440	aimwhere_steam_module.exe
Token: SeDebugPrivilege	1388	powershell.exe
Token: SeDebugPrivilege	3472	powershell.exe
Token: SeDebugPrivilege	1196	powershell.exe
Token: SeDebugPrivilege	4408	powershell.exe
Token: SeDebugPrivilege	4440	aimwhere_steam_module.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4440	aimwhere_steam_module.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 1388	4440	aimwhere_steam_module.exe	87
PID 4440 wrote to memory of 1388	4440	aimwhere_steam_module.exe	87
PID 4440 wrote to memory of 3472	4440	aimwhere_steam_module.exe	90
PID 4440 wrote to memory of 3472	4440	aimwhere_steam_module.exe	90
PID 4440 wrote to memory of 1196	4440	aimwhere_steam_module.exe	92
PID 4440 wrote to memory of 1196	4440	aimwhere_steam_module.exe	92
PID 4440 wrote to memory of 4408	4440	aimwhere_steam_module.exe	94
PID 4440 wrote to memory of 4408	4440	aimwhere_steam_module.exe	94

C:\Users\Admin\AppData\Local\Temp\aimwhere_steam_module.exe
"C:\Users\Admin\AppData\Local\Temp\aimwhere_steam_module.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4440
- 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\aimwhere_steam_module.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1388
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'aimwhere_steam_module.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3472
- 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:1196
- 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:4408

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

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\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
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

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

Filesize
944B

MD5
34f595487e6bfd1d11c7de88ee50356a

SHA1
4caad088c15766cc0fa1f42009260e9a02f953bb

SHA256
0f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d

SHA512
10976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tfoxy322.52g.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1388-13-0x00007FF950990000-0x00007FF951451000-memory.dmp

Filesize
10.8MB

Download
memory/1388-14-0x00007FF950990000-0x00007FF951451000-memory.dmp

Filesize
10.8MB

Download
memory/1388-15-0x00007FF950990000-0x00007FF951451000-memory.dmp

Filesize
10.8MB

Download
memory/1388-18-0x00007FF950990000-0x00007FF951451000-memory.dmp

Filesize
10.8MB

Download
memory/1388-8-0x0000022A8BA40000-0x0000022A8BA62000-memory.dmp

Filesize
136KB

Download
memory/4440-1-0x0000000000B50000-0x0000000000B6A000-memory.dmp

Filesize
104KB

Download
memory/4440-2-0x00007FF950990000-0x00007FF951451000-memory.dmp

Filesize
10.8MB

Download
memory/4440-0-0x00007FF950993000-0x00007FF950995000-memory.dmp

Filesize
8KB

Download
memory/4440-54-0x00007FF950993000-0x00007FF950995000-memory.dmp

Filesize
8KB

Download
memory/4440-55-0x00007FF950990000-0x00007FF951451000-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