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
behavioral1/memory/2396-1-0x0000000000D10000-0x0000000000D26000-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
2364	powershell.exe
4756	powershell.exe
3900	powershell.exe
2964	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-1-5-21-4089630652-1596403869-279772308-1000\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-1-5-21-4089630652-1596403869-279772308-1000\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
8	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
2364	powershell.exe
2364	powershell.exe
4756	powershell.exe
4756	powershell.exe
3900	powershell.exe
3900	powershell.exe
2964	powershell.exe
2964	powershell.exe
2396	SamsungCommisionExternal.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2396	SamsungCommisionExternal.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeDebugPrivilege	4756	powershell.exe
Token: SeDebugPrivilege	3900	powershell.exe
Token: SeDebugPrivilege	2964	powershell.exe
Token: SeDebugPrivilege	2396	SamsungCommisionExternal.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2396	SamsungCommisionExternal.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 2364	2396	SamsungCommisionExternal.exe	83
PID 2396 wrote to memory of 2364	2396	SamsungCommisionExternal.exe	83
PID 2396 wrote to memory of 4756	2396	SamsungCommisionExternal.exe	85
PID 2396 wrote to memory of 4756	2396	SamsungCommisionExternal.exe	85
PID 2396 wrote to memory of 3900	2396	SamsungCommisionExternal.exe	87
PID 2396 wrote to memory of 3900	2396	SamsungCommisionExternal.exe	87
PID 2396 wrote to memory of 2964	2396	SamsungCommisionExternal.exe	89
PID 2396 wrote to memory of 2964	2396	SamsungCommisionExternal.exe	89

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:2396
- 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:2364
- 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:4756
- 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:3900
- 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:2964

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

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

Filesize
944B

MD5
10fb30dc297f99d6ebafa5fee8b24fa2

SHA1
76904509313a49a765edcde26b69c3a61f9fa225

SHA256
567bcacac120711fc04bf8e6c8cd0bff7b61e8ee0a6316254d1005ebb1264e6a

SHA512
c42ace1ea0923fa55592f4f486a508ea56997fdbe0200016b0fc16a33452fc28e4530129a315b3b3a5ede37a07097c13a0eb310c9e91e5d97bb7ce7b955b9498

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_g3uaotgm.kb3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2364-10-0x00000265B53D0000-0x00000265B53F2000-memory.dmp

Filesize
136KB

Download
memory/2364-15-0x00007FFF66360000-0x00007FFF66E21000-memory.dmp

Filesize
10.8MB

Download
memory/2364-18-0x00007FFF66360000-0x00007FFF66E21000-memory.dmp

Filesize
10.8MB

Download
memory/2364-4-0x00007FFF66360000-0x00007FFF66E21000-memory.dmp

Filesize
10.8MB

Download
memory/2364-3-0x00007FFF66360000-0x00007FFF66E21000-memory.dmp

Filesize
10.8MB

Download
memory/2396-0-0x00007FFF66363000-0x00007FFF66365000-memory.dmp

Filesize
8KB

Download
memory/2396-2-0x00007FFF66360000-0x00007FFF66E21000-memory.dmp

Filesize
10.8MB

Download
memory/2396-1-0x0000000000D10000-0x0000000000D26000-memory.dmp

Filesize
88KB

Download
memory/2396-56-0x00007FFF66360000-0x00007FFF66E21000-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