xworm | 3ad4aa1921b844c635bbeef2a492a3d1ff134af6a38a1c31d7d264da3e192a38

Analysis

max time kernel
149s
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
01/06/2024, 02:58

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General

Target
a9b00ac5f9c02e540c61381a5fae62c3.exe
Size 99KB
Sample240601-df6gfsfe41
SHA256 3ad4aa1921b844c635bbeef2a492a3d1ff134af6a38a1c31d7d264da3e192a38
MD5 a9b00ac5f9c02e540c61381a5fae62c3
SHA1 273e272cc73d519c5cba2839de4e6043fd8977b0
SHA512 924316a6cd0b91617d23010cc031ccbc1a99c4d72f9199fb3215d68ae6ea6cc9c3a4888777bf4c72d920d940e68b828a4ede75c299a5f7b7f804250cea4ae570
SSDEEP 1536:n1vP5KmktoR0wQNB+QC+ZMh/uFPah6x2C4bFwOL/n6106/Y7FwoOLTrXatVSFayK:VxLCLN06PahfLbFZL/6PWZOL6GPPy
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

auto-london.gl.at.ply.gg:51655
wiz.bounceme.net:6000

Attributes

Install_directory
%LocalAppData%
install_file
NigNigRat.exe

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral2/memory/4904-1-0x00000000007D0000-0x00000000007EE000-memory.dmp	family_xworm
behavioral2/files/0x000c000000023370-46.dat	family_xworm
behavioral2/memory/4904-48-0x000000001B690000-0x000000001B69E000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4116	powershell.exe
3756	powershell.exe
1188	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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	a9b00ac5f9c02e540c61381a5fae62c3.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a9b00ac5f9c02e540c61381a5fae62c3.lnk	a9b00ac5f9c02e540c61381a5fae62c3.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a9b00ac5f9c02e540c61381a5fae62c3.lnk	a9b00ac5f9c02e540c61381a5fae62c3.exe

Executes dropped EXE 2 IoCs

pid	Process
2696	a9b00ac5f9c02e540c61381a5fae62c3.exe
1824	a9b00ac5f9c02e540c61381a5fae62c3.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a9b00ac5f9c02e540c61381a5fae62c3 = "C:\\Users\\Admin\\AppData\\Local\\a9b00ac5f9c02e540c61381a5fae62c3.exe"	a9b00ac5f9c02e540c61381a5fae62c3.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
22	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
1388	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4116	powershell.exe
4116	powershell.exe
3756	powershell.exe
3756	powershell.exe
1188	powershell.exe
1188	powershell.exe
4904	a9b00ac5f9c02e540c61381a5fae62c3.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe
Token: SeDebugPrivilege	4116	powershell.exe
Token: SeDebugPrivilege	3756	powershell.exe
Token: SeDebugPrivilege	1188	powershell.exe
Token: SeDebugPrivilege	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe
Token: SeDebugPrivilege	2696	a9b00ac5f9c02e540c61381a5fae62c3.exe
Token: SeDebugPrivilege	1824	a9b00ac5f9c02e540c61381a5fae62c3.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4904	a9b00ac5f9c02e540c61381a5fae62c3.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 4116	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	92
PID 4904 wrote to memory of 4116	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	92
PID 4904 wrote to memory of 3756	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	94
PID 4904 wrote to memory of 3756	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	94
PID 4904 wrote to memory of 1188	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	97
PID 4904 wrote to memory of 1188	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	97
PID 4904 wrote to memory of 1388	4904	a9b00ac5f9c02e540c61381a5fae62c3.exe	99
PID 4904 wrote to memory of 1388	4904	a9b00ac5f9c02e540c61381a5fae62c3.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\a9b00ac5f9c02e540c61381a5fae62c3.exe
"C:\Users\Admin\AppData\Local\Temp\a9b00ac5f9c02e540c61381a5fae62c3.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:4904
- 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\a9b00ac5f9c02e540c61381a5fae62c3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4116
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'a9b00ac5f9c02e540c61381a5fae62c3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3756
- 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\a9b00ac5f9c02e540c61381a5fae62c3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1188
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "a9b00ac5f9c02e540c61381a5fae62c3" /tr "C:\Users\Admin\AppData\Local\a9b00ac5f9c02e540c61381a5fae62c3.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1388

C:\Users\Admin\AppData\Local\a9b00ac5f9c02e540c61381a5fae62c3.exe
C:\Users\Admin\AppData\Local\a9b00ac5f9c02e540c61381a5fae62c3.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2696

C:\Users\Admin\AppData\Local\a9b00ac5f9c02e540c61381a5fae62c3.exe
C:\Users\Admin\AppData\Local\a9b00ac5f9c02e540c61381a5fae62c3.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1824

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

a9b00ac5f9c02e540c61381a5fae62c3.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\a9b00ac5f9c02e540c61381a5fae62c3.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 cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438
MD5 cadef9abd087803c630df65264a6c81c
SHA1 babbf3636c347c8727c35f3eef2ee643dbcc4bd2
SHA512 7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0efa2469ae0b02af024fd0e2828ccab085eaefef3736b3bda0ba631e3a45aa48
MD5 bbc2b43d5e574fe7d193c6fc0eb7302c
SHA1 f22683b94ad593fd0513fef37df1fb5d0880cc22
SHA512 287449b168297a5176b26777f2f5ca3284d967b93274db8b3029d130049073560a10e418607f670d08194193aa91fc9cd174717e7c1d051b09c23857fe3ab9d2
MD5 SHA1 SHA512

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__PSScriptPolicyTest_t2gss1w1.kur.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t2gss1w1.kur.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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a9b00ac5f9c02e540c61381a5fae62c3.exe

Path C:\Users\Admin\AppData\Local\a9b00ac5f9c02e540c61381a5fae62c3.exe
Size 99KB
SHA256 3ad4aa1921b844c635bbeef2a492a3d1ff134af6a38a1c31d7d264da3e192a38
MD5 a9b00ac5f9c02e540c61381a5fae62c3
SHA1 273e272cc73d519c5cba2839de4e6043fd8977b0
SHA512 924316a6cd0b91617d23010cc031ccbc1a99c4d72f9199fb3215d68ae6ea6cc9c3a4888777bf4c72d920d940e68b828a4ede75c299a5f7b7f804250cea4ae570
SSDEEP 1536:n1vP5KmktoR0wQNB+QC+ZMh/uFPah6x2C4bFwOL/n6106/Y7FwoOLTrXatVSFayK:VxLCLN06PahfLbFZL/6PWZOL6GPPy
MD5 SHA1 SHA512 SSDEEP

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memory/4116-3-0x00007FF8010B0000-0x00007FF801B71000-memory.dmp

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memory/4116-16-0x00007FF8010B0000-0x00007FF801B71000-memory.dmp

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memory/4116-4-0x000002216E420000-0x000002216E442000-memory.dmp

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memory/4904-0-0x00007FF8010B3000-0x00007FF8010B5000-memory.dmp

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memory/4904-2-0x00007FF8010B0000-0x00007FF801B71000-memory.dmp

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memory/4904-48-0x000000001B690000-0x000000001B69E000-memory.dmp

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memory/4904-49-0x00007FF8010B3000-0x00007FF8010B5000-memory.dmp

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memory/4904-50-0x00007FF8010B0000-0x00007FF801B71000-memory.dmp

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memory/4904-1-0x00000000007D0000-0x00000000007EE000-memory.dmp

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