xworm | b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2

General

Target

b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
Size

831KB
MD5

7c34b697269a715d224025fce3300fb0
SHA1

429056652fdaef40ad87c8a58df36db93fb58cfd
SHA256

b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2
SHA512

6f6a6b23fa8779610c75eac5944e54586eeeadc4891cf3e5454c870c8aa865165a5e991b8973b01a88415ed2b6ca09ae787d2c62472c811a970754f05763b6ae
SSDEEP

768:o4JmoODtZ6xC8qSDQCcZnVJ9QhEHz0uEXOT:o4JmtOfqS0CiD9QhEHz0tk

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

procedure.kro.kr:5155

Mutex

Ll3GZBodOrXAw0Lx

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2952-5-0x0000000000850000-0x0000000000860000-memory.dmp	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 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2732	powershell.exe
2964	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dxdiag.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
2732	powershell.exe
2964	powershell.exe
2952	dxdiag.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
Token: SeDebugPrivilege	2952	dxdiag.exe
Token: SeDebugPrivilege	2732	powershell.exe
Token: SeDebugPrivilege	2964	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2952	dxdiag.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2952	2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 2284 wrote to memory of 2952	2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 2284 wrote to memory of 2952	2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 2284 wrote to memory of 2952	2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 2284 wrote to memory of 2952	2284	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 2952 wrote to memory of 2732	2952	dxdiag.exe	32
PID 2952 wrote to memory of 2732	2952	dxdiag.exe	32
PID 2952 wrote to memory of 2732	2952	dxdiag.exe	32
PID 2952 wrote to memory of 2732	2952	dxdiag.exe	32
PID 2952 wrote to memory of 2964	2952	dxdiag.exe	34
PID 2952 wrote to memory of 2964	2952	dxdiag.exe	34
PID 2952 wrote to memory of 2964	2952	dxdiag.exe	34
PID 2952 wrote to memory of 2964	2952	dxdiag.exe	34

C:\Users\Admin\AppData\Local\Temp\b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
"C:\Users\Admin\AppData\Local\Temp\b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\SysWOW64\dxdiag.exe
  "C:\Windows\System32\dxdiag.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2952
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\SysWOW64\dxdiag.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2732
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'dxdiag.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\U7RPFCYXWTQG9GV9U09F.temp

Filesize
7KB

MD5
02d9b6e5ff82d88fac348170f98256be

SHA1
1db21e81239ac4588b4b1e8a9bdabf31eb7ef91c

SHA256
cfa952c6c6448551a6c2598bbd456364addcc025c8f6ab9e422ce62ea14e18d6

SHA512
f7b186aa70edbca68f09db0b06da67e2efd185eccd0a5b28278eec0bd4d16cb6a73676f2ed1fd805bef2dc1d607a842ec41568d92d615c2abd73966550adf8d2

Download Submit
memory/2284-0-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/2284-1-0x0000000000E30000-0x0000000000F04000-memory.dmp

Filesize
848KB

Download
memory/2284-2-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2284-6-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2952-3-0x00000000000C0000-0x00000000000D1000-memory.dmp

Filesize
68KB

Download
memory/2952-4-0x00000000000C0000-0x00000000000D1000-memory.dmp

Filesize
68KB

Download
memory/2952-5-0x0000000000850000-0x0000000000860000-memory.dmp

Filesize
64KB

Download
memory/2952-7-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2952-8-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2952-16-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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