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/2868-5-0x0000000000940000-0x0000000000950000-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
2812	powershell.exe
3048	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
876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
2812	powershell.exe
3048	powershell.exe
2868	dxdiag.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe
Token: SeDebugPrivilege	2868	dxdiag.exe
Token: SeDebugPrivilege	2812	powershell.exe
Token: SeDebugPrivilege	3048	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2868	dxdiag.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 876 wrote to memory of 2868	876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 876 wrote to memory of 2868	876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 876 wrote to memory of 2868	876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 876 wrote to memory of 2868	876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 876 wrote to memory of 2868	876	b8c74b1b222c4e1a54c8154e3fdbd30ffd6a93cae1b61a6855b7e31f508187f2.exe	31
PID 2868 wrote to memory of 2812	2868	dxdiag.exe	32
PID 2868 wrote to memory of 2812	2868	dxdiag.exe	32
PID 2868 wrote to memory of 2812	2868	dxdiag.exe	32
PID 2868 wrote to memory of 2812	2868	dxdiag.exe	32
PID 2868 wrote to memory of 3048	2868	dxdiag.exe	34
PID 2868 wrote to memory of 3048	2868	dxdiag.exe	34
PID 2868 wrote to memory of 3048	2868	dxdiag.exe	34
PID 2868 wrote to memory of 3048	2868	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:876
- 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:2868
- - 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:2812
- - 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:3048

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\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
605bef4be690576d2b894972bfefc050

SHA1
3c0ccc0a2c28ac4ba3b31c316c765eb9a186d8e9

SHA256
ee1ccf6a90829b57675399476f170c4e5fc8ef5770f34c9f77d53602ff47c3d1

SHA512
5b0c8689516a0e27c18b5f848feafadbe39190d9c11ca1551b83c9f1dd0a540b252181673694860e56ac95803230b06d50b315a1c2b2af57a62760f3ebade96f

Download Submit
memory/876-0-0x00000000744DE000-0x00000000744DF000-memory.dmp

Filesize
4KB

Download
memory/876-1-0x0000000001150000-0x0000000001224000-memory.dmp

Filesize
848KB

Download
memory/876-2-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/876-6-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-3-0x0000000000080000-0x0000000000091000-memory.dmp

Filesize
68KB

Download
memory/2868-4-0x0000000000080000-0x0000000000091000-memory.dmp

Filesize
68KB

Download
memory/2868-5-0x0000000000940000-0x0000000000950000-memory.dmp

Filesize
64KB

Download
memory/2868-7-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-8-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-16-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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