xworm | 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

General

Target

mygame.exe
Size

137KB
MD5

1a925fce50787a5028b73dd32e0c7dce
SHA1

7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA256

00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
SHA512

ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP

3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.23:48450

Mutex

2YsFPOHVMLfmF9px

Attributes

Install_directory
%AppData%
install_file
Update.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/memory/2412-1-0x0000000000250000-0x0000000000278000-memory.dmp	family_xworm
behavioral3/files/0x0013000000023b50-59.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
4332	powershell.exe
2292	powershell.exe
4076	powershell.exe
2760	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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	mygame.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1412	Update.exe
3136	Update.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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	mygame.exe

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
3588	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4332	powershell.exe
4332	powershell.exe
2292	powershell.exe
2292	powershell.exe
4076	powershell.exe
4076	powershell.exe
2760	powershell.exe
2760	powershell.exe
2412	mygame.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2412	mygame.exe
Token: SeDebugPrivilege	4332	powershell.exe
Token: SeDebugPrivilege	2292	powershell.exe
Token: SeDebugPrivilege	4076	powershell.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	2412	mygame.exe
Token: SeDebugPrivilege	1412	Update.exe
Token: SeDebugPrivilege	3136	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2412	mygame.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 4332	2412	mygame.exe	88
PID 2412 wrote to memory of 4332	2412	mygame.exe	88
PID 2412 wrote to memory of 2292	2412	mygame.exe	90
PID 2412 wrote to memory of 2292	2412	mygame.exe	90
PID 2412 wrote to memory of 4076	2412	mygame.exe	92
PID 2412 wrote to memory of 4076	2412	mygame.exe	92
PID 2412 wrote to memory of 2760	2412	mygame.exe	96
PID 2412 wrote to memory of 2760	2412	mygame.exe	96
PID 2412 wrote to memory of 3588	2412	mygame.exe	100
PID 2412 wrote to memory of 3588	2412	mygame.exe	100

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\mygame.exe
"C:\Users\Admin\AppData\Local\Temp\mygame.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:2412
- 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\mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4332
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2292
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4076
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2760
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3588

C:\Users\Admin\AppData\Roaming\Update.exe
C:\Users\Admin\AppData\Roaming\Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1412

C:\Users\Admin\AppData\Roaming\Update.exe
C:\Users\Admin\AppData\Roaming\Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3136

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Update.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
83685d101174171875b4a603a6c2a35c

SHA1
37be24f7c4525e17fa18dbd004186be3a9209017

SHA256
0c557845aab1da497bbff0e8fbe65cabf4cb2804b97ba8ae8c695a528af70870

SHA512
005a97a8e07b1840abdcef86a7881fd9bdc8acbfdf3eafe1dceb6374060626d81d789e57d87ca4096a39e28d5cca00f8945edff0a747591691ae75873d2b3fb5

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

Filesize
944B

MD5
cae60f0ddddac635da71bba775a2c5b4

SHA1
386f1a036af61345a7d303d45f5230e2df817477

SHA256
b2dd636b7b0d3bfe44cef5e1175828b1fa7bd84d5563f54342944156ba996c16

SHA512
28ed8a8bc132ef56971cfd7b517b17cdb74a7f8c247ef6bff232996210075e06aa58a415825a1e038cfb547ad3dc6882bf1ca1b68c5b360ef0512a1440850253

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ehnbds5d.ds4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
137KB

MD5
1a925fce50787a5028b73dd32e0c7dce

SHA1
7205d5c3d7efbc5805eb0b343a1bc83903e7589c

SHA256
00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

SHA512
ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8

Download Submit
memory/2412-56-0x00007FF8E8700000-0x00007FF8E91C1000-memory.dmp

Filesize
10.8MB

Download
memory/2412-0-0x00007FF8E8703000-0x00007FF8E8705000-memory.dmp

Filesize
8KB

Download
memory/2412-57-0x00007FF8E8703000-0x00007FF8E8705000-memory.dmp

Filesize
8KB

Download
memory/2412-58-0x00007FF8E8700000-0x00007FF8E91C1000-memory.dmp

Filesize
10.8MB

Download
memory/2412-1-0x0000000000250000-0x0000000000278000-memory.dmp

Filesize
160KB

Download
memory/4332-17-0x00007FF8E8700000-0x00007FF8E91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4332-14-0x00007FF8E8700000-0x00007FF8E91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4332-13-0x00007FF8E8700000-0x00007FF8E91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4332-12-0x00007FF8E8700000-0x00007FF8E91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4332-7-0x0000014A7B280000-0x0000014A7B2A2000-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