xworm | e5e2ab81f164c5b8015dcfea5442a90a11b1c9b45f5eff6b32e2c3b883368d21

General

Target

BootstrapperNew.exe
Size

3.0MB
MD5

1317c60295a029805cf29016e53417d8
SHA1

10b5c9538fca54ab9af9c6c8c45f09c87c165ca6
SHA256

e5e2ab81f164c5b8015dcfea5442a90a11b1c9b45f5eff6b32e2c3b883368d21
SHA512

c6f396c70781fbea4644edd3db7c54a6c5aa406ae5982fd1aa55e87bfc701ffd4b2aeeb4e75258326c37b97f55fd0d7d0fddde05a7b67b0399483d52bb036fee
SSDEEP

49152:y3P+t/fcRNRZbAK5F6vYjUvKvThbqbi4yVkO7Wkq+POGALqPnNgDIvZ2+eT3WS5M:y/iHcPRJAK59UvKvF4CJW+mz4gkvZ2+t

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/FgmKAhUD

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0008000000023d18-22.dat	family_xworm
behavioral1/memory/1796-25-0x0000000000670000-0x0000000000688000-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
2808	powershell.exe
3852	powershell.exe
4296	powershell.exe
4872	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-1-5-21-1170604239-850860757-3112005715-1000\Control Panel\International\Geo\Nation	BootstrapperNew.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Control Panel\International\Geo\Nation	Solara.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
384	Bootstrapper.exe
1796	Solara.exe
4104	svchost.exe
5060	svchost.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-1-5-21-1170604239-850860757-3112005715-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	Solara.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
27	pastebin.com
26	pastebin.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2808	powershell.exe
2808	powershell.exe
3852	powershell.exe
3852	powershell.exe
4296	powershell.exe
4296	powershell.exe
4872	powershell.exe
4872	powershell.exe
1796	Solara.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1796	Solara.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	3852	powershell.exe
Token: SeDebugPrivilege	4296	powershell.exe
Token: SeDebugPrivilege	4872	powershell.exe
Token: SeDebugPrivilege	1796	Solara.exe
Token: SeDebugPrivilege	4104	svchost.exe
Token: SeDebugPrivilege	5060	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1796	Solara.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 384	3988	BootstrapperNew.exe	83
PID 3988 wrote to memory of 384	3988	BootstrapperNew.exe	83
PID 3988 wrote to memory of 1796	3988	BootstrapperNew.exe	84
PID 3988 wrote to memory of 1796	3988	BootstrapperNew.exe	84
PID 1796 wrote to memory of 2808	1796	Solara.exe	89
PID 1796 wrote to memory of 2808	1796	Solara.exe	89
PID 1796 wrote to memory of 3852	1796	Solara.exe	91
PID 1796 wrote to memory of 3852	1796	Solara.exe	91
PID 1796 wrote to memory of 4296	1796	Solara.exe	93
PID 1796 wrote to memory of 4296	1796	Solara.exe	93
PID 1796 wrote to memory of 4872	1796	Solara.exe	95
PID 1796 wrote to memory of 4872	1796	Solara.exe	95
PID 1796 wrote to memory of 4008	1796	Solara.exe	99
PID 1796 wrote to memory of 4008	1796	Solara.exe	99

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\BootstrapperNew.exe
"C:\Users\Admin\AppData\Local\Temp\BootstrapperNew.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe
  "C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
  2⤵
  - Executes dropped EXE
  PID:384
- C:\Users\Admin\AppData\Local\Temp\Solara.exe
  "C:\Users\Admin\AppData\Local\Temp\Solara.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1796
- - 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\Solara.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2808
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Solara.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3852
- - 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'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4296
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4872
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4008

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4104

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

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\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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
47605a4dda32c9dff09a9ca441417339

SHA1
4f68c895c35b0dc36257fc8251e70b968c560b62

SHA256
e6254c2bc9846a76a4567ab91b6eae76e937307ff9301b65d577ffe6e15fe40a

SHA512
b6823b6e794a2fe3e4c4ecfb3f0d61a54821de7feb4f9e3e7fd463e7fbb5e6848f59865b487dafebeac431e4f4db81ef56836d94cac67da39852c566ed34a885

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

Filesize
944B

MD5
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

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

Filesize
2.9MB

MD5
f227cdfd423b3cc03bb69c49babf4da3

SHA1
3db5a97d9b0f2545e7ba97026af6c28512200441

SHA256
cb5d6c1ca0aa6232a2d55e14b20ac4a9945a0bd063c57d60a5ed3ae94160e3e8

SHA512
b10afd03b02a928545c16fad39a6ae46b68b1e1a2477a6990803ce80008e7161fb2ebc9380ba15a1b074bb436aa34bcd6c94a922933d438b1c22489717e1e10e

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

Filesize
72KB

MD5
40fae76ad7eb67e5690cf09412155cb8

SHA1
829a5b1b1a0ae2356e607605d8d8a8a7ea60108c

SHA256
fcfd2661484f8051219cbf126a532bb383f1940cbfaf2477d016b0f25e0c5f9b

SHA512
2131464302e83b3428d05bf717de10911de17b6abf217ef81f8b35795bed95c144d7498379bdda3ea162d664dcb936d1847d7cc481e568992b4459d07083176f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mtaib5eu.23k.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/384-29-0x000001A0DDE50000-0x000001A0DDE58000-memory.dmp

Filesize
32KB

Download
memory/384-40-0x000001A0DA580000-0x000001A0DA58A000-memory.dmp

Filesize
40KB

Download
memory/384-31-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/384-33-0x000001A0DA560000-0x000001A0DA56E000-memory.dmp

Filesize
56KB

Download
memory/384-32-0x000001A0DA590000-0x000001A0DA5C8000-memory.dmp

Filesize
224KB

Download
memory/384-34-0x000001A0DA5D0000-0x000001A0DA6D0000-memory.dmp

Filesize
1024KB

Download
memory/384-35-0x000001A0DA570000-0x000001A0DA57A000-memory.dmp

Filesize
40KB

Download
memory/384-39-0x000001A0DA700000-0x000001A0DA70A000-memory.dmp

Filesize
40KB

Download
memory/384-38-0x000001A0DA720000-0x000001A0DA736000-memory.dmp

Filesize
88KB

Download
memory/384-26-0x000001A0BE2F0000-0x000001A0BE5D2000-memory.dmp

Filesize
2.9MB

Download
memory/384-41-0x000001A0DA750000-0x000001A0DA758000-memory.dmp

Filesize
32KB

Download
memory/384-37-0x000001A0DA710000-0x000001A0DA718000-memory.dmp

Filesize
32KB

Download
memory/384-36-0x000001A0DA6D0000-0x000001A0DA6F6000-memory.dmp

Filesize
152KB

Download
memory/384-96-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/384-95-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/384-28-0x000001A0BE9A0000-0x000001A0BE9B0000-memory.dmp

Filesize
64KB

Download
memory/384-30-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/1796-93-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/1796-25-0x0000000000670000-0x0000000000688000-memory.dmp

Filesize
96KB

Download
memory/1796-27-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/1796-94-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/1796-97-0x00007FFFA10D0000-0x00007FFFA1B91000-memory.dmp

Filesize
10.8MB

Download
memory/2808-52-0x0000024DB74B0000-0x0000024DB74D2000-memory.dmp

Filesize
136KB

Download
memory/3988-0-0x00007FFFA10D3000-0x00007FFFA10D5000-memory.dmp

Filesize
8KB

Download
memory/3988-1-0x00000000009A0000-0x0000000000C9A000-memory.dmp

Filesize
3.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads