xworm | a8dd80f236a5b28dd7f4856ca32bb254832d4a66a0405cc32e61bd4762915714

Analysis

max time kernel
119s
max time network
143s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/03/2025, 14:37

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

CulMasterBot.exe
Size

758KB
MD5

2417767a8d9740d0c304bb72ed185b67
SHA1

21bbd4db761968bc1fb0708767ef10814dd41868
SHA256

7f8878badd48f61c9af71d304ee2cc5d2e580a92816b721a206d2889063f4b81
SHA512

c0b947608909829271cefb797017933a02d55a378eb6f70ecba20c3d86658c46fb58a515e90d32419cfdeab63d7e166fc699cbf0bfba8b5135301b5d8b9f63ae
SSDEEP

12288:7fQqQuCmgRYeJIDdrd+pQkKVn6nY4u5fsR1b:7fQqQuiJIprdOQJn6nbuiF

Score

10^/10

xworm discovery rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

176.65.134.31:7000

Mutex

6H3f8cuSC1IGC8kj

Attributes

install_file
USB.exe

aes.plain

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/memory/2720-40-0x0000000000550000-0x000000000055E000-memory.dmp	disable_win_def

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/1160-10-0x0000000000090000-0x000000000009E000-memory.dmp	family_xworm
behavioral1/memory/1160-12-0x0000000000090000-0x000000000009E000-memory.dmp	family_xworm
behavioral1/memory/2720-28-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2720-33-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2720-30-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Executes dropped EXE 1 IoCs

pid	Process
2364	uttudv.exe

Loads dropped DLL 2 IoCs

pid	Process
2720	InstallUtil.exe
2720	InstallUtil.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1812 set thread context of 2720	1812	CulMasterBot.exe	32
PID 2364 set thread context of 860	2364	uttudv.exe	35

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	CulMasterBot.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uttudv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
860	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1812	CulMasterBot.exe
1812	CulMasterBot.exe
1812	CulMasterBot.exe
1812	CulMasterBot.exe
1812	CulMasterBot.exe
2364	uttudv.exe
2364	uttudv.exe
2364	uttudv.exe
2364	uttudv.exe
2364	uttudv.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1812	CulMasterBot.exe
Token: SeDebugPrivilege	2720	InstallUtil.exe
Token: SeDebugPrivilege	2364	uttudv.exe
Token: SeDebugPrivilege	860	InstallUtil.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 1160	1812	CulMasterBot.exe	30
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 1812 wrote to memory of 2720	1812	CulMasterBot.exe	32
PID 2720 wrote to memory of 2364	2720	InstallUtil.exe	34
PID 2720 wrote to memory of 2364	2720	InstallUtil.exe	34
PID 2720 wrote to memory of 2364	2720	InstallUtil.exe	34
PID 2720 wrote to memory of 2364	2720	InstallUtil.exe	34
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35
PID 2364 wrote to memory of 860	2364	uttudv.exe	35

C:\Users\Admin\AppData\Local\Temp\CulMasterBot.exe
"C:\Users\Admin\AppData\Local\Temp\CulMasterBot.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:1160
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Users\Admin\AppData\Local\Temp\uttudv.exe
    "C:\Users\Admin\AppData\Local\Temp\uttudv.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2364
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: AddClipboardFormatListener
      Suspicious use of AdjustPrivilegeToken
      PID:860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
71KB

MD5
83142242e97b8953c386f988aa694e4a

SHA1
833ed12fc15b356136dcdd27c61a50f59c5c7d50

SHA256
d72761e1a334a754ce8250e3af7ea4bf25301040929fd88cf9e50b4a9197d755

SHA512
bb6da177bd16d163f377d9b4c63f6d535804137887684c113cc2f643ceab4f34338c06b5a29213c23d375e95d22ef417eac928822dfb3688ce9e2de9d5242d10

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar66B6.tmp

Filesize
183KB

MD5
109cab5505f5e065b63d01361467a83b

SHA1
4ed78955b9272a9ed689b51bf2bf4a86a25e53fc

SHA256
ea6b7f51e85835c09259d9475a7d246c3e764ad67c449673f9dc97172c351673

SHA512
753a6da5d6889dd52f40208e37f2b8c185805ef81148682b269fff5aa84a46d710fe0ebfe05bce625da2e801e1c26745998a41266fa36bf47bc088a224d730cc

Download Submit
\Users\Admin\AppData\Local\Temp\uttudv.exe

Filesize
882KB

MD5
0bf190d5229cd876dc398141addb4755

SHA1
83ad458b0c3ca248e7a05e83ceb39027138af3ac

SHA256
8991a0fb032262c8392fdd13e8d0c0a9782dd73d11dfab93eb94505bd4145844

SHA512
966a0e8dfbc5859e23bba8be932518614282579b1bb3cbca8aec7138f4b6de096ed230e44811fd6dc95304899898d451d202457457e38dfddaaf2834fbb69f53

Download Submit
memory/860-70-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-112-0x0000000006730000-0x0000000006810000-memory.dmp

Filesize
896KB

Download
memory/860-66-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-64-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-62-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-60-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-69-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-72-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/860-73-0x0000000001080000-0x0000000001142000-memory.dmp

Filesize
776KB

Download
memory/860-91-0x00000000060D0000-0x00000000061AE000-memory.dmp

Filesize
888KB

Download
memory/1160-12-0x0000000000090000-0x000000000009E000-memory.dmp

Filesize
56KB

Download
memory/1160-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1160-6-0x0000000000090000-0x000000000009E000-memory.dmp

Filesize
56KB

Download
memory/1160-8-0x0000000000090000-0x000000000009E000-memory.dmp

Filesize
56KB

Download
memory/1160-10-0x0000000000090000-0x000000000009E000-memory.dmp

Filesize
56KB

Download
memory/1812-26-0x000000007410E000-0x000000007410F000-memory.dmp

Filesize
4KB

Download
memory/1812-0-0x000000007410E000-0x000000007410F000-memory.dmp

Filesize
4KB

Download
memory/1812-4-0x0000000000500000-0x000000000051A000-memory.dmp

Filesize
104KB

Download
memory/1812-34-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/1812-27-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/1812-2-0x0000000000340000-0x0000000000366000-memory.dmp

Filesize
152KB

Download
memory/1812-3-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/1812-5-0x0000000000880000-0x0000000000886000-memory.dmp

Filesize
24KB

Download
memory/1812-1-0x0000000000900000-0x00000000009C2000-memory.dmp

Filesize
776KB

Download
memory/2364-57-0x00000000011B0000-0x0000000001294000-memory.dmp

Filesize
912KB

Download
memory/2364-59-0x0000000000310000-0x0000000000336000-memory.dmp

Filesize
152KB

Download
memory/2720-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2720-55-0x0000000005030000-0x0000000005064000-memory.dmp

Filesize
208KB

Download
memory/2720-56-0x0000000005B70000-0x0000000005BBA000-memory.dmp

Filesize
296KB

Download
memory/2720-58-0x00000000050C0000-0x00000000050D6000-memory.dmp

Filesize
88KB

Download
memory/2720-46-0x0000000006D50000-0x0000000006DF6000-memory.dmp

Filesize
664KB

Download
memory/2720-44-0x00000000045E0000-0x00000000045E8000-memory.dmp

Filesize
32KB

Download
memory/2720-43-0x0000000004790000-0x00000000047D8000-memory.dmp

Filesize
288KB

Download
memory/2720-42-0x0000000000CE0000-0x0000000000CFC000-memory.dmp

Filesize
112KB

Download
memory/2720-41-0x0000000006A60000-0x0000000006D42000-memory.dmp

Filesize
2.9MB

Download
memory/2720-40-0x0000000000550000-0x000000000055E000-memory.dmp

Filesize
56KB

Download
memory/2720-38-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-37-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-36-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-35-0x0000000074100000-0x00000000747EE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-30-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2720-33-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2720-28-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download