xworm | 78faa3006a538ebb08d194b94ffaec25e5a704a40e0aafa533f3e5c538d453ad

General

Target

Nursultan.exe
Size

491KB
MD5

d326a49628c02672b8199e2d7f6eefd6
SHA1

3d7bfcb1055df6d9a99b9a861735643d979dbef1
SHA256

78faa3006a538ebb08d194b94ffaec25e5a704a40e0aafa533f3e5c538d453ad
SHA512

95be9d339665ac48bce1e09de17e85f03bc6e4cbee590a2d3fa6f134ae63cacd1b995f7a9d929105fbbb81f3f31c5d77eb6f1f7d1fd0dfee0c07fd9ede5c52d7
SSDEEP

3072:qaXN3R7KFl0QuPcwo6AWDw32wgD29avk48DosgRARZKBzcoFRJvmFdJZJbvRNpG:lN39QIjHDC229avr8D+WKzjJ+FDH

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

19.ip.gl.ply.gg:33519

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00080000000120fe-5.dat	family_xworm
behavioral1/memory/1280-10-0x0000000000DF0000-0x0000000000E3A000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2712	powershell.exe
2620	powershell.exe
2676	powershell.exe
2184	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1280	Nursultan.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	Nursultan.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
4	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1280	Nursultan.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2712	powershell.exe
2620	powershell.exe
2676	powershell.exe
2184	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1280	Nursultan.exe
Token: SeDebugPrivilege	2712	powershell.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	1280	Nursultan.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 1280	1820	Nursultan.exe	28
PID 1820 wrote to memory of 1280	1820	Nursultan.exe	28
PID 1820 wrote to memory of 1280	1820	Nursultan.exe	28
PID 1820 wrote to memory of 1808	1820	Nursultan.exe	29
PID 1820 wrote to memory of 1808	1820	Nursultan.exe	29
PID 1820 wrote to memory of 1808	1820	Nursultan.exe	29
PID 1280 wrote to memory of 2712	1280	Nursultan.exe	32
PID 1280 wrote to memory of 2712	1280	Nursultan.exe	32
PID 1280 wrote to memory of 2712	1280	Nursultan.exe	32
PID 1280 wrote to memory of 2620	1280	Nursultan.exe	34
PID 1280 wrote to memory of 2620	1280	Nursultan.exe	34
PID 1280 wrote to memory of 2620	1280	Nursultan.exe	34
PID 1280 wrote to memory of 2676	1280	Nursultan.exe	36
PID 1280 wrote to memory of 2676	1280	Nursultan.exe	36
PID 1280 wrote to memory of 2676	1280	Nursultan.exe	36
PID 1280 wrote to memory of 2184	1280	Nursultan.exe	38
PID 1280 wrote to memory of 2184	1280	Nursultan.exe	38
PID 1280 wrote to memory of 2184	1280	Nursultan.exe	38

C:\Users\Admin\AppData\Local\Temp\Nursultan.exe
"C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Users\Admin\AppData\Roaming\Nursultan.exe
  "C:\Users\Admin\AppData\Roaming\Nursultan.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1280
- - 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\Nursultan.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2712
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Nursultan.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2620
- - 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'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2676
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2184
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\..bat" "
  2⤵
  PID:1808

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\..bat

Filesize
11B

MD5
9905e5a33c6edd8eb5f59780afbf74de

SHA1
64b2cd0186ff6fe05072ee88e2bb54476023772e

SHA256
c134b2f85415ba5cfce3e3fe4745688335745a9bb22152ac8f5c77f190d8aee3

SHA512
e10711d0fb09db27192e9af05ae45b83cf3882d98e904a7f1f969cf24c2f9626f70f35d76f57477fe9c64a58bc74100410740e9d506d4e72d3e2900d6277816e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
19dad4c8cf2d028f10c08b5596337e19

SHA1
0461dc9baf00b8cfa2cc197e9e8d1407169d8d9c

SHA256
cacf2b86781950c11579f01846f8da809df1e9a93795412df8c79f5ebc99280d

SHA512
1c7a1b39582a405329f705e8c9bc15f347b67bebd8e028f62a95e26e5181fa3f28d4b9ecaaf1ebf80ba2cd85238ee8c76a6acba99ed8d6f3db4155f075e15771

Download Submit
C:\Users\Admin\AppData\Roaming\Nursultan.exe

Filesize
273KB

MD5
05559d83ce9b8984e66740f882a2dac9

SHA1
afdf7442e86627d46d987ed8982f141926cdf3f1

SHA256
fb2aa53b1c2c105ac321abf3448afb452eedff2f0407846fb3d85a8b6236e357

SHA512
1b8e0141db5986a8117ae1c3aba26fb0551fbd24948a07745d8e36705bcf813803ec8570f8290d41ae8ed5d4da0d7690621b86b42e6d46575ea62fa733638364

Download Submit
memory/1280-10-0x0000000000DF0000-0x0000000000E3A000-memory.dmp

Filesize
296KB

Download
memory/1280-12-0x000007FEF64A0000-0x000007FEF6E8C000-memory.dmp

Filesize
9.9MB

Download
memory/1280-13-0x000007FEF64A0000-0x000007FEF6E8C000-memory.dmp

Filesize
9.9MB

Download
memory/1280-38-0x000007FEF64A0000-0x000007FEF6E8C000-memory.dmp

Filesize
9.9MB

Download
memory/1280-44-0x000007FEF64A0000-0x000007FEF6E8C000-memory.dmp

Filesize
9.9MB

Download
memory/1820-0-0x000007FEF64A3000-0x000007FEF64A4000-memory.dmp

Filesize
4KB

Download
memory/1820-1-0x0000000000D20000-0x0000000000DA0000-memory.dmp

Filesize
512KB

Download
memory/2620-25-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/2620-26-0x0000000001EE0000-0x0000000001EE8000-memory.dmp

Filesize
32KB

Download
memory/2712-18-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2712-19-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads