xworm | 234d2f0fab4f2399ae1c4387e9dc58a19a3ea863d82c67ab1d90378b29e7748e

General

Target

BluestacksInstaller.exe
Size

80KB
MD5

7a8057b88626b927138a6ac40016ff6d
SHA1

beda666793500c73af8e4a73bf31d4831bda1a89
SHA256

234d2f0fab4f2399ae1c4387e9dc58a19a3ea863d82c67ab1d90378b29e7748e
SHA512

facc80950e636c0ef6b5bf703e9d19316d616735a7b6100c5a86897f0ee1d67668623eed5fed12a1086b85ceaadf9f8cfaddb0d2d0702b385e7a0ca5a0c5ce0b
SSDEEP

768:YifC8qTvhE50tEIDPiKuukR7L1ptTfFWPt9e26cOMhFaB2hBC:YiTqTvhOYEIbiKuumnBFe9e26cOMX9A

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

19.ip.gl.ply.gg:14513

Mutex

333EKK7TuWsNmMLK

Attributes

Install_directory
%AppData%
install_file
svchost.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4772-0-0x00000000004C0000-0x00000000004DA000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
4824	powershell.exe
3868	powershell.exe
3096	powershell.exe
1396	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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	BluestacksInstaller.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	BluestacksInstaller.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	BluestacksInstaller.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-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	BluestacksInstaller.exe

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
4824	powershell.exe
4824	powershell.exe
3868	powershell.exe
3868	powershell.exe
3096	powershell.exe
3096	powershell.exe
1396	powershell.exe
1396	powershell.exe
4772	BluestacksInstaller.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4772	BluestacksInstaller.exe
Token: SeDebugPrivilege	4824	powershell.exe
Token: SeDebugPrivilege	3868	powershell.exe
Token: SeDebugPrivilege	3096	powershell.exe
Token: SeDebugPrivilege	1396	powershell.exe
Token: SeDebugPrivilege	4772	BluestacksInstaller.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4772	BluestacksInstaller.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 4824	4772	BluestacksInstaller.exe	81
PID 4772 wrote to memory of 4824	4772	BluestacksInstaller.exe	81
PID 4772 wrote to memory of 3868	4772	BluestacksInstaller.exe	83
PID 4772 wrote to memory of 3868	4772	BluestacksInstaller.exe	83
PID 4772 wrote to memory of 3096	4772	BluestacksInstaller.exe	85
PID 4772 wrote to memory of 3096	4772	BluestacksInstaller.exe	85
PID 4772 wrote to memory of 1396	4772	BluestacksInstaller.exe	87
PID 4772 wrote to memory of 1396	4772	BluestacksInstaller.exe	87

C:\Users\Admin\AppData\Local\Temp\BluestacksInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\BluestacksInstaller.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:4772
- 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\BluestacksInstaller.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4824
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'BluestacksInstaller.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3868
- 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'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3096
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1396

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

Replay Monitor

Loading Replay Monitor...

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
6d14ccefeb263594e60b1765e131f7a3

SHA1
4a9ebdc0dff58645406c40b7b140e1b174756721

SHA256
57cd435c8b2bf10a2c77698301789c032e1b6b623ff1420c72e8bca0b10f1e5c

SHA512
2013a26123f72a4106524fd9d7389ac4654f97033d22707efc084fb2a3ad01c298eb64f01bb64861ab603615022dbe7cfc97475346edb16b3ba72e905127f101

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

Filesize
944B

MD5
e7cebf3b7ef4a6001988e0da1e82cc1d

SHA1
c4345e45710589200d39b79d407fc370be963296

SHA256
1bcc9d14f60f45002c38384b6765a0d9462ae90abf7c954d24a997f0167e325d

SHA512
d3bb57029ac793c37be4f673c1d7d67202235b72d12e5e42f7dc46e82f0e4cf179b9048a930bb9f076a82686c5014b337245928c04873448bfc55e7769cffa31

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5oftuu2y.stm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4772-0-0x00000000004C0000-0x00000000004DA000-memory.dmp

Filesize
104KB

Download
memory/4772-1-0x00007FFB795C3000-0x00007FFB795C5000-memory.dmp

Filesize
8KB

Download
memory/4772-56-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/4772-57-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/4824-13-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/4824-14-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/4824-17-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/4824-12-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/4824-11-0x0000022F35B00000-0x0000022F35B22000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads