xworm | 30258a07cc6d0fa827544493e9036e955056da88d0530efa8cf3535ecbf8e75c

General

Target

Semo.exe
Size

168KB
MD5

651429675c1d86cf068746159aa66b6d
SHA1

aad51d3448cb1e9f337a985ed840a0064d5699ee
SHA256

30258a07cc6d0fa827544493e9036e955056da88d0530efa8cf3535ecbf8e75c
SHA512

397e2a05e8f3d45c04953998a09d76212b38e3dc9073be814cb3010ea94b00733d2557a6e5002b0a2401fb33d62908e794553a6afd31e45b0afe6987806272fb
SSDEEP

3072:gwe+6Rkd+MisaP1JmK6Hw9hEgXEp1NDLfgAiKgD7fYtB2SOEQW40/mmo0ioi:glbRFLsaPfmK6HwXDXsFglf7gya4tm

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

activities-mustang.gl.at.ply.gg:54756

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023ad0-6.dat	family_xworm
behavioral2/memory/3228-16-0x00000000002E0000-0x00000000002F6000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1164	powershell.exe
5060	powershell.exe
1836	powershell.exe

Checks computer location settings 2 TTPs 2 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	Semo.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	X.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
3228	X.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\X = "C:\\Users\\Admin\\AppData\\Roaming\\X.exe"	X.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5060	powershell.exe
5060	powershell.exe
1836	powershell.exe
1836	powershell.exe
1164	powershell.exe
1164	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3228	X.exe
Token: SeDebugPrivilege	5060	powershell.exe
Token: SeDebugPrivilege	1836	powershell.exe
Token: SeDebugPrivilege	1164	powershell.exe
Token: SeDebugPrivilege	3228	X.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 3228	996	Semo.exe	87
PID 996 wrote to memory of 3228	996	Semo.exe	87
PID 3228 wrote to memory of 5060	3228	X.exe	96
PID 3228 wrote to memory of 5060	3228	X.exe	96
PID 3228 wrote to memory of 1836	3228	X.exe	98
PID 3228 wrote to memory of 1836	3228	X.exe	98
PID 3228 wrote to memory of 1164	3228	X.exe	100
PID 3228 wrote to memory of 1164	3228	X.exe	100

C:\Users\Admin\AppData\Local\Temp\Semo.exe
"C:\Users\Admin\AppData\Local\Temp\Semo.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:996
- C:\Users\Admin\AppData\Local\Temp\X.exe
  "C:\Users\Admin\AppData\Local\Temp\X.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3228
- - 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\X.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5060
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'X.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1836
- - 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\X.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1164

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
67e8893616f805af2411e2f4a1411b2a

SHA1
39bf1e1a0ddf46ce7c136972120f512d92827dcd

SHA256
ca0dfe104c1bf27f7e01999fcdabc16c6400c3da937c832c26bdbca322381d31

SHA512
164e911a9935e75c8be1a6ec3d31199a16ba2a1064da6c09d771b2a38dd7fddd142301ef55d67d90f306d3a454a1ce7b72e129ea42e44500b9b8c623a8d98b4d

Download Submit
C:\Users\Admin\AppData\Local\Temp\X.exe

Filesize
61KB

MD5
2c76b88a912c741f1404b400c1add578

SHA1
13d1b6d341d59aef6833a4123e22484ddb665183

SHA256
5178365164f71d22459d807a5ba61e8d50dd15a4adb4a00b08248c6f141f8074

SHA512
b8f8ae619f7cdf323c4f98e63bea5c3059886792b0c5a41df96a243811bf78df2fec45bf4b459e07c8c564ee2875852ac47eb3c3ad34cf70c8ba27c547163ebe

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yj2kncjh.3ib.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/996-1-0x00000000001C0000-0x00000000001F0000-memory.dmp

Filesize
192KB

Download
memory/996-15-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/996-0-0x00007FFE174C3000-0x00007FFE174C5000-memory.dmp

Filesize
8KB

Download
memory/996-19-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/1164-55-0x0000026158920000-0x0000026158B3C000-memory.dmp

Filesize
2.1MB

Download
memory/3228-16-0x00000000002E0000-0x00000000002F6000-memory.dmp

Filesize
88KB

Download
memory/3228-17-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/3228-62-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/3228-63-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/3228-64-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/5060-25-0x0000020DABBF0000-0x0000020DABC12000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads