xworm | 0f06d9dfb9badfd337bd1dfb21f8b0ebb934e81072cddcef3d8466e526f2275b

General

Target

xdblake.exe
Size

66KB
MD5

bca20b0a6a3877b3bbedd6595e804164
SHA1

0bfd19a1dac3f937098aa005ff0b5aab2e767663
SHA256

0f06d9dfb9badfd337bd1dfb21f8b0ebb934e81072cddcef3d8466e526f2275b
SHA512

4932b511e0429f3a97b726483a87641d579a0d0d8f61c2771eb900baaffe36ea9ee2fba4e098fd922dc3c2aab8b0684483096ed9eb0de23cdc97f63ac449ac32
SSDEEP

1536:aefDEXUBdPPSuPr+hBcbDVnjXVQ6eK4ORonSLIF:aextSuPr4BcbpjFIK4O6nSsF

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

yet-assist.gl.at.ply.gg:63100

Attributes

Install_directory
%ProgramData%
install_file
$77wsappx.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3112-1-0x0000000000A30000-0x0000000000A46000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023b84-59.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
2572	powershell.exe
4076	powershell.exe
2948	powershell.exe
4696	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	xdblake.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77wsappx.lnk	xdblake.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77wsappx.lnk	xdblake.exe

Executes dropped EXE 3 IoCs

pid	Process
4828	$77wsappx.exe
3524	$77wsappx.exe
3080	$77wsappx.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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77wsappx = "C:\\ProgramData\\$77wsappx.exe"	xdblake.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
15	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
3700	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3112	xdblake.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2948	powershell.exe
2948	powershell.exe
4696	powershell.exe
4696	powershell.exe
2572	powershell.exe
2572	powershell.exe
4076	powershell.exe
4076	powershell.exe
3112	xdblake.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3112	xdblake.exe
Token: SeDebugPrivilege	2948	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeDebugPrivilege	2572	powershell.exe
Token: SeDebugPrivilege	4076	powershell.exe
Token: SeDebugPrivilege	3112	xdblake.exe
Token: SeDebugPrivilege	4828	$77wsappx.exe
Token: SeDebugPrivilege	3524	$77wsappx.exe
Token: SeDebugPrivilege	3080	$77wsappx.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3112	xdblake.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3112 wrote to memory of 2948	3112	xdblake.exe	91
PID 3112 wrote to memory of 2948	3112	xdblake.exe	91
PID 3112 wrote to memory of 4696	3112	xdblake.exe	94
PID 3112 wrote to memory of 4696	3112	xdblake.exe	94
PID 3112 wrote to memory of 2572	3112	xdblake.exe	96
PID 3112 wrote to memory of 2572	3112	xdblake.exe	96
PID 3112 wrote to memory of 4076	3112	xdblake.exe	98
PID 3112 wrote to memory of 4076	3112	xdblake.exe	98
PID 3112 wrote to memory of 3700	3112	xdblake.exe	102
PID 3112 wrote to memory of 3700	3112	xdblake.exe	102

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\xdblake.exe
"C:\Users\Admin\AppData\Local\Temp\xdblake.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3112
- 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\xdblake.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xdblake.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4696
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\$77wsappx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2572
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77wsappx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4076
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77wsappx" /tr "C:\ProgramData\$77wsappx.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3700

C:\ProgramData\$77wsappx.exe
C:\ProgramData\$77wsappx.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4828

C:\ProgramData\$77wsappx.exe
C:\ProgramData\$77wsappx.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3524

C:\ProgramData\$77wsappx.exe
C:\ProgramData\$77wsappx.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3080

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:\ProgramData\$77wsappx.exe

Filesize
66KB

MD5
bca20b0a6a3877b3bbedd6595e804164

SHA1
0bfd19a1dac3f937098aa005ff0b5aab2e767663

SHA256
0f06d9dfb9badfd337bd1dfb21f8b0ebb934e81072cddcef3d8466e526f2275b

SHA512
4932b511e0429f3a97b726483a87641d579a0d0d8f61c2771eb900baaffe36ea9ee2fba4e098fd922dc3c2aab8b0684483096ed9eb0de23cdc97f63ac449ac32

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\$77wsappx.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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

Filesize
944B

MD5
110b59ca4d00786d0bde151d21865049

SHA1
557e730d93fdf944a0cad874022df1895fb5b2e2

SHA256
77f69011c214ea5a01fd2035d781914c4893aee66d784deadc22179eadfdf77f

SHA512
cb55ac6eca50f4427718bace861679c88b2fdfea94d30209e8d61ca73a6ce9f8c4b5334922d2660a829b0636d20cbdf3bae1497c920e604efe6c636019feb10e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mzkvhwhc.ztf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2948-8-0x00000136A3AE0000-0x00000136A3B02000-memory.dmp

Filesize
136KB

Download
memory/2948-18-0x00007FF802EA0000-0x00007FF803961000-memory.dmp

Filesize
10.8MB

Download
memory/2948-15-0x00007FF802EA0000-0x00007FF803961000-memory.dmp

Filesize
10.8MB

Download
memory/2948-14-0x00007FF802EA0000-0x00007FF803961000-memory.dmp

Filesize
10.8MB

Download
memory/2948-13-0x00007FF802EA0000-0x00007FF803961000-memory.dmp

Filesize
10.8MB

Download
memory/3112-0-0x00007FF802EA3000-0x00007FF802EA5000-memory.dmp

Filesize
8KB

Download
memory/3112-52-0x00007FF802EA3000-0x00007FF802EA5000-memory.dmp

Filesize
8KB

Download
memory/3112-58-0x00007FF802EA0000-0x00007FF803961000-memory.dmp

Filesize
10.8MB

Download
memory/3112-2-0x00007FF802EA0000-0x00007FF803961000-memory.dmp

Filesize
10.8MB

Download
memory/3112-1-0x0000000000A30000-0x0000000000A46000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads