xworm | 53ffbe2e9c08961a21157be3a79fe0a33d19ec4bdae8cf2dc62c27f1fa4097df

General

Target

SolaraBootstrapper.exe
Size

255KB
MD5

e03c1771945c884883a82704a93ca453
SHA1

78609d9940ec6e59db7961ec2ac859c68ce81186
SHA256

53ffbe2e9c08961a21157be3a79fe0a33d19ec4bdae8cf2dc62c27f1fa4097df
SHA512

ed063720d08c2cd8b674101b5d457795ec570fee19c1e0747fd708428f7b8ae9736cfc02ace2fdc0040cc15019163fa86fba22147c68d77fc22be95d3343ab6d
SSDEEP

3072:sH++bXekOTbSiLvAzII9x66AOag74srxxVfPWKvQIFY623:snbGCqONxTGqQI+62

Score

10^/10

xworm evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

23.ip.gl.ply.gg:7972

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/4164-59-0x0000000000930000-0x000000000093E000-memory.dmp	disable_win_def

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4164-1-0x0000000000090000-0x00000000000D6000-memory.dmp	family_xworm

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	SolaraBootstrapper.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	SolaraBootstrapper.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	SolaraBootstrapper.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	SolaraBootstrapper.exe

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
3512	powershell.exe
2924	powershell.exe
1176	powershell.exe
2960	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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	SolaraBootstrapper.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	SolaraBootstrapper.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	SolaraBootstrapper.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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	SolaraBootstrapper.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2524	timeout.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3512	powershell.exe
3512	powershell.exe
2924	powershell.exe
2924	powershell.exe
1176	powershell.exe
1176	powershell.exe
2960	powershell.exe
2960	powershell.exe
4164	SolaraBootstrapper.exe
2764	powershell.exe
2764	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4164	SolaraBootstrapper.exe
Token: SeDebugPrivilege	3512	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	1176	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	4164	SolaraBootstrapper.exe
Token: SeDebugPrivilege	2764	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4164	SolaraBootstrapper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4164	SolaraBootstrapper.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4164 wrote to memory of 3512	4164	SolaraBootstrapper.exe	87
PID 4164 wrote to memory of 3512	4164	SolaraBootstrapper.exe	87
PID 4164 wrote to memory of 2924	4164	SolaraBootstrapper.exe	90
PID 4164 wrote to memory of 2924	4164	SolaraBootstrapper.exe	90
PID 4164 wrote to memory of 1176	4164	SolaraBootstrapper.exe	92
PID 4164 wrote to memory of 1176	4164	SolaraBootstrapper.exe	92
PID 4164 wrote to memory of 2960	4164	SolaraBootstrapper.exe	94
PID 4164 wrote to memory of 2960	4164	SolaraBootstrapper.exe	94
PID 4164 wrote to memory of 2764	4164	SolaraBootstrapper.exe	111
PID 4164 wrote to memory of 2764	4164	SolaraBootstrapper.exe	111
PID 4164 wrote to memory of 3908	4164	SolaraBootstrapper.exe	114
PID 4164 wrote to memory of 3908	4164	SolaraBootstrapper.exe	114
PID 3908 wrote to memory of 2524	3908	cmd.exe	116
PID 3908 wrote to memory of 2524	3908	cmd.exe	116

C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4164
- 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\SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3512
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2924
- 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:1176
- 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:2960
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7078.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3908
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2524

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

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
eb033be02578f9635ec47bdc1de5c3fb

SHA1
ec356bc87381354a06baa9c30e8c3ac3d30e0f6f

SHA256
bd827af3192bf83c75a32e51ed2de83bd3b90d6b99350721a189a57cec15d063

SHA512
4d8778503646f7016df73ff9d204760f4fe4d2b24157920ac3e5651653373975b2f2d229530143059f11b16c42822ad7963e628ad6066022ee712c17d90595ed

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

Filesize
944B

MD5
1c967279560ca1b998d82b009aef5186

SHA1
62c709063e480bf14963e3fd60a0407dc62428ae

SHA256
d22931bb06423504c44c02967f060449b9cd76e2599a3dfa2d5ad7e638b3cba1

SHA512
629defeba5f242fd8e8493749a79e3e07e0a98b8be13d0eb29dc5c0fe609b3b76027efa0cbcf702d990014b0844f5f442d2da3e2171fd25f2063a6b6280eb04f

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

Filesize
944B

MD5
c08aea9c78561a5f00398a723fdf2925

SHA1
2c880cbb5d02169a86bb9517ce2a0184cb177c6e

SHA256
63d2688b92da4d1bb69980b7998b9be1595dd9e53951434a9414d019c4f825a7

SHA512
d30db2f55bbda7102ffe90520d233355633313dcc77cdb69a26fdbb56e59dd41793def23d69dc5dc3f94c5bd41d3c26b3628886fd2edbed2df0b332e9a21f95c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kcpwww4c.noe.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7078.tmp.bat

Filesize
170B

MD5
8252a029377044ac4a4f2870538633c6

SHA1
69c9f32b010d677556c0a15527a589d3b33bda73

SHA256
0b2a6c429715e8908823aeeac96cd894ada6c4e9c4d656c68994b6f42c647e77

SHA512
a8b8d9c5af41e8cd0f57d365ecbde3413a32cdde32b420cacbb8cd897801f7154cea6dc5758a1fb69d84a6aa506d93787e4ee3c9edcc081544e7788aa61008de

Download Submit
memory/3512-13-0x00007FFD35F40000-0x00007FFD36A01000-memory.dmp

Filesize
10.8MB

Download
memory/3512-17-0x00007FFD35F40000-0x00007FFD36A01000-memory.dmp

Filesize
10.8MB

Download
memory/3512-14-0x00007FFD35F40000-0x00007FFD36A01000-memory.dmp

Filesize
10.8MB

Download
memory/3512-2-0x00007FFD35F40000-0x00007FFD36A01000-memory.dmp

Filesize
10.8MB

Download
memory/3512-8-0x0000024C78F50000-0x0000024C78F72000-memory.dmp

Filesize
136KB

Download
memory/4164-58-0x00007FFD35F40000-0x00007FFD36A01000-memory.dmp

Filesize
10.8MB

Download
memory/4164-57-0x00007FFD35F40000-0x00007FFD36A01000-memory.dmp

Filesize
10.8MB

Download
memory/4164-56-0x00007FFD35F43000-0x00007FFD35F45000-memory.dmp

Filesize
8KB

Download
memory/4164-59-0x0000000000930000-0x000000000093E000-memory.dmp

Filesize
56KB

Download
memory/4164-0-0x00007FFD35F43000-0x00007FFD35F45000-memory.dmp

Filesize
8KB

Download
memory/4164-71-0x000000001ADE0000-0x000000001ADEA000-memory.dmp

Filesize
40KB

Download
memory/4164-72-0x000000001ADF0000-0x000000001ADFA000-memory.dmp

Filesize
40KB

Download
memory/4164-73-0x000000001AEB0000-0x000000001AEC2000-memory.dmp

Filesize
72KB

Download
memory/4164-1-0x0000000000090000-0x00000000000D6000-memory.dmp

Filesize
280KB

Download
memory/4164-82-0x00007FFD35F40000-0x00007FFD36A01000-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