xworm | 99bf031f23b1759702a56ccfc9425f0a063654dcc4a94d8feeb89792c82f3082

General

Target

fix.exe
Size

35KB
MD5

83bbe29b99a54bad48074efb72ce1fcc
SHA1

421deeba13130a8eebacc8c7f48f28e6fe8485f2
SHA256

99bf031f23b1759702a56ccfc9425f0a063654dcc4a94d8feeb89792c82f3082
SHA512

67fe2ac907c297cd3c4d1af7f80257b468bc4e73cab428568ea1238d41cd8c43262765a0b0d43b2accb003901a66e9e7ec162fefda2fd89040697e1e168ac27f
SSDEEP

768:ChiLce92aOrsQiUy5FyS9ZL6LOjhibold:ChkceWsQi5FT9ZL6LOjGo7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

20.ip.gl.ply.gg:53765

Mutex

JCfj6Aifpywc6Ul9

Attributes

Install_directory
%AppData%
install_file
svchost.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2308-1-0x0000000000E30000-0x0000000000E40000-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
860	powershell.exe
4192	powershell.exe
4372	powershell.exe
2624	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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	fix.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	fix.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
860	powershell.exe
860	powershell.exe
4192	powershell.exe
4192	powershell.exe
4372	powershell.exe
4372	powershell.exe
2624	powershell.exe
2624	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2308	fix.exe
Token: SeDebugPrivilege	860	powershell.exe
Token: SeDebugPrivilege	4192	powershell.exe
Token: SeDebugPrivilege	4372	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2308	fix.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2308 wrote to memory of 860	2308	fix.exe	85
PID 2308 wrote to memory of 860	2308	fix.exe	85
PID 2308 wrote to memory of 4192	2308	fix.exe	87
PID 2308 wrote to memory of 4192	2308	fix.exe	87
PID 2308 wrote to memory of 4372	2308	fix.exe	89
PID 2308 wrote to memory of 4372	2308	fix.exe	89
PID 2308 wrote to memory of 2624	2308	fix.exe	91
PID 2308 wrote to memory of 2624	2308	fix.exe	91

C:\Users\Admin\AppData\Local\Temp\fix.exe
"C:\Users\Admin\AppData\Local\Temp\fix.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2308
- 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\fix.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:860
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'fix.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4192
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4372
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u4noifub.eac.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/860-11-0x00000214FF7D0000-0x00000214FF7F2000-memory.dmp

Filesize
136KB

Download
memory/860-14-0x00007FFBF0D80000-0x00007FFBF1841000-memory.dmp

Filesize
10.8MB

Download
memory/860-17-0x00007FFBF0D80000-0x00007FFBF1841000-memory.dmp

Filesize
10.8MB

Download
memory/860-13-0x00007FFBF0D80000-0x00007FFBF1841000-memory.dmp

Filesize
10.8MB

Download
memory/860-12-0x00007FFBF0D80000-0x00007FFBF1841000-memory.dmp

Filesize
10.8MB

Download
memory/2308-0-0x00007FFBF0D83000-0x00007FFBF0D85000-memory.dmp

Filesize
8KB

Download
memory/2308-1-0x0000000000E30000-0x0000000000E40000-memory.dmp

Filesize
64KB

Download
memory/2308-53-0x00007FFBF0D80000-0x00007FFBF1841000-memory.dmp

Filesize
10.8MB

Download
memory/2308-54-0x00007FFBF0D80000-0x00007FFBF1841000-memory.dmp

Filesize
10.8MB

Download
memory/2308-55-0x0000000001680000-0x000000000168C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads