xworm | a0f69b466322e4b95af9d008e4ee9e758dedb3b27a5c6a50d4361ccdd88c3ae1

Resubmissions

20/06/2024, 17:22

240620-vxtbwstark10

20/06/2024, 16:57

240620-vggcdsscqm10

Analysis

max time kernel
99s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/06/2024, 17:22

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General

Target
infected.exe
Size 76KB
Sample240620-vxtbwstark
SHA256 a0f69b466322e4b95af9d008e4ee9e758dedb3b27a5c6a50d4361ccdd88c3ae1
MD5 a1afaea404e9f505c06b6ceaf087bad6
SHA1 f3231b75673922e3dfce1706a3a5587979f04c25
SHA512 5fa770e23280b31f84dac094243e26b5176697eb4235f67112afde6d82e064278cf42ccea9ab1d236740a87648681ef4c673e06a7e2dee0b8d5c2d0507035dc9
SSDEEP 1536:xA98LuxE8SsXHwshIi6/C9pAkbGq8neagvtS8d6Q36TjDOmUH3o:xUsux/1HhI1/C1bGR3gvtopjDOmUXo
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

sebeee-39917.portmap.io:39917

Attributes

Install_directory
%AppData%
install_file
RuntimeBroker.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1184-1-0x0000000000530000-0x000000000054A000-memory.dmp	family_xworm
behavioral1/files/0x000a00000002340f-59.dat	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
2696	powershell.exe
1288	powershell.exe
4988	powershell.exe
4432	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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	infected.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
440	RuntimeBroker.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-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "C:\\Users\\Admin\\AppData\\Roaming\\RuntimeBroker.exe"	infected.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
19	ip-api.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
5032	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2696	powershell.exe
2696	powershell.exe
1288	powershell.exe
1288	powershell.exe
4988	powershell.exe
4988	powershell.exe
4432	powershell.exe
4432	powershell.exe
1184	infected.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1184	infected.exe
Token: SeDebugPrivilege	2696	powershell.exe
Token: SeDebugPrivilege	1288	powershell.exe
Token: SeDebugPrivilege	4988	powershell.exe
Token: SeDebugPrivilege	4432	powershell.exe
Token: SeDebugPrivilege	1184	infected.exe
Token: SeDebugPrivilege	440	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1184	infected.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1184 wrote to memory of 2696	1184	infected.exe	90
PID 1184 wrote to memory of 2696	1184	infected.exe	90
PID 1184 wrote to memory of 1288	1184	infected.exe	93
PID 1184 wrote to memory of 1288	1184	infected.exe	93
PID 1184 wrote to memory of 4988	1184	infected.exe	95
PID 1184 wrote to memory of 4988	1184	infected.exe	95
PID 1184 wrote to memory of 4432	1184	infected.exe	97
PID 1184 wrote to memory of 4432	1184	infected.exe	97
PID 1184 wrote to memory of 5032	1184	infected.exe	100
PID 1184 wrote to memory of 5032	1184	infected.exe	100

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\infected.exe
"C:\Users\Admin\AppData\Local\Temp\infected.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:1184
- 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\infected.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2696
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'infected.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1288
- 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\RuntimeBroker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4988
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4432
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5032

C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010
MD5 62623d22bd9e037191765d5083ce16a3
SHA1 4a07da6872672f715a4780513d95ed8ddeefd259
SHA512 9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0c557845aab1da497bbff0e8fbe65cabf4cb2804b97ba8ae8c695a528af70870
MD5 83685d101174171875b4a603a6c2a35c
SHA1 37be24f7c4525e17fa18dbd004186be3a9209017
SHA512 005a97a8e07b1840abdcef86a7881fd9bdc8acbfdf3eafe1dceb6374060626d81d789e57d87ca4096a39e28d5cca00f8945edff0a747591691ae75873d2b3fb5
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 d36c21211f297a74a801881707690fa7a0a0a31addd3c7ba1522275b8848ab50
MD5 0fd3f36f28a947bdd05f1e05acf24489
SHA1 cf12e091a80740df2201c5b47049dd231c530ad3
SHA512 5f132308b06e621aace1091f523649bcb5d1823b478691799791f4154cb96b9897f563eed8ad8db4a03714d815246479372e0920c659eb3fd9006271e58429ee
MD5 SHA1 SHA512

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__PSScriptPolicyTest_d5h5dcma.thk.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_d5h5dcma.thk.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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RuntimeBroker.exe

Path C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
Size 76KB
SHA256 a0f69b466322e4b95af9d008e4ee9e758dedb3b27a5c6a50d4361ccdd88c3ae1
MD5 a1afaea404e9f505c06b6ceaf087bad6
SHA1 f3231b75673922e3dfce1706a3a5587979f04c25
SHA512 5fa770e23280b31f84dac094243e26b5176697eb4235f67112afde6d82e064278cf42ccea9ab1d236740a87648681ef4c673e06a7e2dee0b8d5c2d0507035dc9
SSDEEP 1536:xA98LuxE8SsXHwshIi6/C9pAkbGq8neagvtS8d6Q36TjDOmUH3o:xUsux/1HhI1/C1bGR3gvtopjDOmUXo
MD5 SHA1 SHA512 SSDEEP

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memory/1184-0-0x00007FFAE60C3000-0x00007FFAE60C5000-memory.dmp

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memory/1184-2-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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memory/1184-1-0x0000000000530000-0x000000000054A000-memory.dmp

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memory/1184-58-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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memory/2696-4-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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memory/2696-19-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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memory/2696-16-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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memory/2696-12-0x00000133A3AD0000-0x00000133A3AF2000-memory.dmp

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memory/2696-10-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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memory/2696-3-0x00007FFAE60C0000-0x00007FFAE6B81000-memory.dmp

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