xworm | 2a03094b59e5dbc2e69fa76f01a35c58fb5466c9b47b87d621fb26b0b037ee59

General

Target

SolaraBootstrapper.exe
Size

266KB
MD5

bfea4fbe1ad2dc882c79c09f103fd395
SHA1

48d80787945fc1355ce97ab5dc795cf0e7b25f01
SHA256

2a03094b59e5dbc2e69fa76f01a35c58fb5466c9b47b87d621fb26b0b037ee59
SHA512

2043da716ff26e1fa635a2e13e2191e04c2713ae05eca35540d4148dfbcd2ced76ec977419c10c7d164b1fc0336cad4d7c70267307169aae50c4577484b4204f
SSDEEP

3072:xnkK65+bdKBfKOwcliLvAzII9x66AOag74srxxVfPWKvQIFY623:xndbbwxPqONxTGqQI+62

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

18.ip.gl.ply.gg:19043

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/5088-1-0x0000000000C50000-0x0000000000C98000-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
2708	powershell.exe
2976	powershell.exe
2944	powershell.exe
2016	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	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-1-5-21-4089630652-1596403869-279772308-1000\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

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2708	powershell.exe
2708	powershell.exe
2976	powershell.exe
2976	powershell.exe
2944	powershell.exe
2944	powershell.exe
2016	powershell.exe
2016	powershell.exe
5088	SolaraBootstrapper.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	5088	SolaraBootstrapper.exe
Token: SeDebugPrivilege	2708	powershell.exe
Token: SeDebugPrivilege	2976	powershell.exe
Token: SeDebugPrivilege	2944	powershell.exe
Token: SeDebugPrivilege	2016	powershell.exe
Token: SeDebugPrivilege	5088	SolaraBootstrapper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5088	SolaraBootstrapper.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 2708	5088	SolaraBootstrapper.exe	87
PID 5088 wrote to memory of 2708	5088	SolaraBootstrapper.exe	87
PID 5088 wrote to memory of 2976	5088	SolaraBootstrapper.exe	91
PID 5088 wrote to memory of 2976	5088	SolaraBootstrapper.exe	91
PID 5088 wrote to memory of 2944	5088	SolaraBootstrapper.exe	93
PID 5088 wrote to memory of 2944	5088	SolaraBootstrapper.exe	93
PID 5088 wrote to memory of 2016	5088	SolaraBootstrapper.exe	97
PID 5088 wrote to memory of 2016	5088	SolaraBootstrapper.exe	97

C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.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:5088
- 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:2708
- 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:2976
- 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:2944
- 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:2016

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
cfc40d2596b18039af3d10f98fd25b63

SHA1
3b6ea692e309571c51e8e84416b7a0e1fe3aeacd

SHA256
1935ea5724b185e3780f614b4b79d9065a9a1116cec2fb07bf12a838fed277f0

SHA512
3c48d3377045babb7a7ff61e4538d3093359469092ad4bc59febea8e649445c568cc52a39e5c81e7d70e3a1f861f89e233fce24517bc0a5c0a82686e7c13e26e

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_asjvlx4a.3ij.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2708-7-0x000001FC47F80000-0x000001FC47FA2000-memory.dmp

Filesize
136KB

Download
memory/2708-14-0x00007FFDF20F0000-0x00007FFDF2BB1000-memory.dmp

Filesize
10.8MB

Download
memory/2708-17-0x00007FFDF20F0000-0x00007FFDF2BB1000-memory.dmp

Filesize
10.8MB

Download
memory/2708-13-0x00007FFDF20F0000-0x00007FFDF2BB1000-memory.dmp

Filesize
10.8MB

Download
memory/2708-12-0x00007FFDF20F0000-0x00007FFDF2BB1000-memory.dmp

Filesize
10.8MB

Download
memory/5088-0-0x00007FFDF20F3000-0x00007FFDF20F5000-memory.dmp

Filesize
8KB

Download
memory/5088-1-0x0000000000C50000-0x0000000000C98000-memory.dmp

Filesize
288KB

Download
memory/5088-56-0x00007FFDF20F0000-0x00007FFDF2BB1000-memory.dmp

Filesize
10.8MB

Download
memory/5088-57-0x00007FFDF20F3000-0x00007FFDF20F5000-memory.dmp

Filesize
8KB

Download
memory/5088-58-0x00007FFDF20F0000-0x00007FFDF2BB1000-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