xworm | 3e7248da17fb3706721289b65dba4f90a8ccbfc635782fa1420ccad39160a293

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 10:07

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General

Target
4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe
Size 80KB
Sample240605-l5m1eade64
SHA256 3e7248da17fb3706721289b65dba4f90a8ccbfc635782fa1420ccad39160a293
MD5 4fa3856c500a77fb59e0f1bf8e034aa0
SHA1 c3930dda8d13e37dd7888e754cf720f382f0f0b5
SHA512 ae0bbf933651cd10f86eb0db7d187bbabc32abf74bbff2b703f69fe16addfab13d6a48f3d9bfaf61cfc70af01ded7265269aad2730b0e65e3921f70bf989199d
SSDEEP 1536:1s/8Ptv0Bo/EHMSQx36nzl/0brkB6WcFsi6bMKcNOyv9V1N0/:6/cSBeEHA36psbrk8Wc6yNOyFLN0/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

185.223.77.135:1604
:1604

Attributes

Install_directory
%AppData%
install_file
Nexus_PTO.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2968-1-0x00000000005E0000-0x00000000005FA000-memory.dmp	family_xworm
behavioral2/files/0x000b0000000233e0-59.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
2660	powershell.exe
4056	powershell.exe
5084	powershell.exe
4932	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	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Nexus_PTO.lnk	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Nexus_PTO.lnk	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe

Executes dropped EXE 2 IoCs

pid	Process
4516	Nexus_PTO.exe
4924	Nexus_PTO.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\Nexus_PTO = "C:\\Users\\Admin\\AppData\\Roaming\\Nexus_PTO.exe"	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.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
13	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
212	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4056	powershell.exe
4056	powershell.exe
5084	powershell.exe
5084	powershell.exe
4932	powershell.exe
4932	powershell.exe
2660	powershell.exe
2660	powershell.exe
2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe
Token: SeDebugPrivilege	4056	powershell.exe
Token: SeDebugPrivilege	5084	powershell.exe
Token: SeDebugPrivilege	4932	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe
Token: SeDebugPrivilege	4516	Nexus_PTO.exe
Token: SeDebugPrivilege	4924	Nexus_PTO.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 4056	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	85
PID 2968 wrote to memory of 4056	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	85
PID 2968 wrote to memory of 5084	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	88
PID 2968 wrote to memory of 5084	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	88
PID 2968 wrote to memory of 4932	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	90
PID 2968 wrote to memory of 4932	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	90
PID 2968 wrote to memory of 2660	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	92
PID 2968 wrote to memory of 2660	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	92
PID 2968 wrote to memory of 212	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	94
PID 2968 wrote to memory of 212	2968	4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe	94

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\4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe
"C:\Users\Admin\AppData\Local\Temp\4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.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:2968
- 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\4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4056
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '4fa3856c500a77fb59e0f1bf8e034aa0_NeikiAnalytics.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5084
- 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\Nexus_PTO.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4932
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Nexus_PTO.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Nexus_PTO" /tr "C:\Users\Admin\AppData\Roaming\Nexus_PTO.exe"
  2⤵
  - Creates scheduled task(s)
  PID:212

C:\Users\Admin\AppData\Roaming\Nexus_PTO.exe
C:\Users\Admin\AppData\Roaming\Nexus_PTO.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4516

C:\Users\Admin\AppData\Roaming\Nexus_PTO.exe
C:\Users\Admin\AppData\Roaming\Nexus_PTO.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

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

Nexus_PTO.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Nexus_PTO.exe.log
Size 654B
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
MD5 SHA1 SHA512

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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 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 b99f3c778a047e0348c92c16e0419fa29418d10d0fec61ad8283e92a094a2b32
MD5 aeceee3981c528bdc5e1c635b65d223d
SHA1 de9939ed37edca6772f5cdd29f6a973b36b7d31b
SHA512 df48285f38e9284efdbd9f8d99e2e94a46fb5465953421ab88497b73ae06895b98ea5c98796560810a6f342c31a9112ea87e03cd3e267fd8518d7585f492a8fb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 1fed2c9bc05b3fcb93f493124dbf1680c6445f67e3d49680257183132514509c
MD5 085e0a3b869f290afea5688a8ac4e7c5
SHA1 0fedef5057708908bcca9e7572be8f46cef4f3ca
SHA512 bbac0555a05dbe83154a90caa44a653c8a05c87594a211548b165c5b1d231e3818830e754c0b6de3e5cb64dba3a5ad18bebae05cb9157e1dd46bce2a86d18ede
MD5 SHA1 SHA512

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__PSScriptPolicyTest_v0infznn.lsn.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_v0infznn.lsn.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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Nexus_PTO.exe

Path C:\Users\Admin\AppData\Roaming\Nexus_PTO.exe
Size 80KB
SHA256 3e7248da17fb3706721289b65dba4f90a8ccbfc635782fa1420ccad39160a293
MD5 4fa3856c500a77fb59e0f1bf8e034aa0
SHA1 c3930dda8d13e37dd7888e754cf720f382f0f0b5
SHA512 ae0bbf933651cd10f86eb0db7d187bbabc32abf74bbff2b703f69fe16addfab13d6a48f3d9bfaf61cfc70af01ded7265269aad2730b0e65e3921f70bf989199d
SSDEEP 1536:1s/8Ptv0Bo/EHMSQx36nzl/0brkB6WcFsi6bMKcNOyv9V1N0/:6/cSBeEHA36psbrk8Wc6yNOyFLN0/
MD5 SHA1 SHA512 SSDEEP

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memory/2968-1-0x00000000005E0000-0x00000000005FA000-memory.dmp

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memory/2968-2-0x00007FF9036E0000-0x00007FF9041A1000-memory.dmp

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memory/2968-0-0x00007FF9036E3000-0x00007FF9036E5000-memory.dmp

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memory/2968-58-0x00007FF9036E0000-0x00007FF9041A1000-memory.dmp

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memory/2968-57-0x00007FF9036E3000-0x00007FF9036E5000-memory.dmp

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memory/4056-4-0x00007FF9036E0000-0x00007FF9041A1000-memory.dmp

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memory/4056-18-0x00007FF9036E0000-0x00007FF9041A1000-memory.dmp

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memory/4056-15-0x00007FF9036E0000-0x00007FF9041A1000-memory.dmp

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memory/4056-14-0x00000213DAF80000-0x00000213DAFA2000-memory.dmp

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memory/4056-3-0x00007FF9036E0000-0x00007FF9041A1000-memory.dmp

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