xworm | e65d7f5beb1f383e07917e867fb3b18a59a597319d152ad148b37a8924b8780d

General

Target

SamsungCommisionExternal.exe
Size

63KB
MD5

6f30a565049364df3068b5bc88fd36d6
SHA1

2ca485eb96156bfc561acd69649cf3339da6c610
SHA256

e65d7f5beb1f383e07917e867fb3b18a59a597319d152ad148b37a8924b8780d
SHA512

c01edc2fe4e5ad26b9511cc0bc114221878cf961b436a091a79611ce27da69ce7cf58afdcc71d295ad25f08701b1eb16c0c298fd22fbcb69004f760ea2b89ffe
SSDEEP

1536:9VbfG3pj8mIfpubPOggHEyj26+6POhjV5yD/9:/fGZrIf0bPDgkyjnPOhp5U9

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:24707

modified-begun.gl.at.ply.gg:24707

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3940-1-0x0000000000EB0000-0x0000000000EC6000-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
3420	powershell.exe
4728	powershell.exe
1744	powershell.exe
2656	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	SamsungCommisionExternal.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Smasmug.lnk	SamsungCommisionExternal.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Smasmug.lnk	SamsungCommisionExternal.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Smasmug = "C:\\Users\\Admin\\AppData\\Roaming\\Smasmug"	SamsungCommisionExternal.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
14	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3420	powershell.exe
3420	powershell.exe
4728	powershell.exe
4728	powershell.exe
1744	powershell.exe
1744	powershell.exe
2656	powershell.exe
2656	powershell.exe
3940	SamsungCommisionExternal.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3940	SamsungCommisionExternal.exe
Token: SeDebugPrivilege	3420	powershell.exe
Token: SeDebugPrivilege	4728	powershell.exe
Token: SeDebugPrivilege	1744	powershell.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	3940	SamsungCommisionExternal.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3940	SamsungCommisionExternal.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3940 wrote to memory of 3420	3940	SamsungCommisionExternal.exe	87
PID 3940 wrote to memory of 3420	3940	SamsungCommisionExternal.exe	87
PID 3940 wrote to memory of 4728	3940	SamsungCommisionExternal.exe	89
PID 3940 wrote to memory of 4728	3940	SamsungCommisionExternal.exe	89
PID 3940 wrote to memory of 1744	3940	SamsungCommisionExternal.exe	91
PID 3940 wrote to memory of 1744	3940	SamsungCommisionExternal.exe	91
PID 3940 wrote to memory of 2656	3940	SamsungCommisionExternal.exe	93
PID 3940 wrote to memory of 2656	3940	SamsungCommisionExternal.exe	93

C:\Users\Admin\AppData\Local\Temp\SamsungCommisionExternal.exe
"C:\Users\Admin\AppData\Local\Temp\SamsungCommisionExternal.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3940
- 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\SamsungCommisionExternal.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3420
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SamsungCommisionExternal.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4728
- 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\Smasmug'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Smasmug'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2656

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
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

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

Filesize
944B

MD5
aba273eeba4876ea41ee0e64b4cbb51d

SHA1
bef5f75b81cf27268dc0d0f30f00b022f9288db9

SHA256
67fc3f5c3407858793c6fac6131b0f340667ffc567fa76b43245ecf2621322c9

SHA512
23dc2f0cfc68194dcbf407a6528cf9f9a8aa89f4821be22413bde036ae5ca44144b568aa3160372b9741f3d0f5baa48dff8a8b582bdedc3ad3fb121af340c0ae

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

Filesize
944B

MD5
7a451cd1316d70a65910773fee8c3a43

SHA1
d2db32d5037153dd1d94565b51b5b385817a3c3d

SHA256
862d25ed22075f3d1f5e8d29a3c6e050dc91e53a4dc653c3f0f7c627a12ee26c

SHA512
60887f795036fbd6d25234c17dab4463a8a02f576ae8c07dd7b4c4ff1dba35f99b7301139ea051a7a80fdfc9e003a2f0c2dd0d444a82ecf87a3df21507332aa6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_njdkf04u.yf2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3420-13-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/3420-14-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/3420-15-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/3420-18-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/3420-4-0x000001D833D40000-0x000001D833D62000-memory.dmp

Filesize
136KB

Download
memory/3940-0-0x00007FFD0BD53000-0x00007FFD0BD55000-memory.dmp

Filesize
8KB

Download
memory/3940-2-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/3940-1-0x0000000000EB0000-0x0000000000EC6000-memory.dmp

Filesize
88KB

Download
memory/3940-56-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads