xworm | 685247d0074365beb7fdd3942878bdf2fce06e7b1049f5cc803a50fa4e757d91

General

Target

Null menu.exe
Size

484KB
MD5

cc5fdd81e44d6b85b629544133820a27
SHA1

d5e8421ac31abddd23f2b00841d2ed5f671d2670
SHA256

685247d0074365beb7fdd3942878bdf2fce06e7b1049f5cc803a50fa4e757d91
SHA512

398b99025320847042717fcfb5a6f9b15f95583a7304f4e8315c1746c58ed46083cf133d9893ee6d187068a4c98216c15af6d010ec84119bc3fb9e8bcabde9e4
SSDEEP

1536:GUU/LRr4lW/f4RQYvX3yb+bWwpfkABQBf6kOJZYJ/Hi6pkRpuuoRzakOJ+ON8xqE:GT+8XCnXCb+bWwANOJCJWkH/G4Z

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

193.161.193.99:26331

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4980-1-0x00000000003B0000-0x000000000042E000-memory.dmp	family_xworm
behavioral2/files/0x000b00000002361a-58.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
3120	powershell.exe
5004	powershell.exe
888	powershell.exe
4272	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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	Null menu.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2772	System User

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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System User = "C:\\Users\\Admin\\AppData\\Roaming\\System User"	Null menu.exe

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
4304	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3120	powershell.exe
3120	powershell.exe
5004	powershell.exe
5004	powershell.exe
888	powershell.exe
888	powershell.exe
4272	powershell.exe
4272	powershell.exe
4980	Null menu.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4980	Null menu.exe
Token: SeDebugPrivilege	3120	powershell.exe
Token: SeDebugPrivilege	5004	powershell.exe
Token: SeDebugPrivilege	888	powershell.exe
Token: SeDebugPrivilege	4272	powershell.exe
Token: SeDebugPrivilege	4980	Null menu.exe
Token: SeDebugPrivilege	2772	System User

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4980	Null menu.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4980 wrote to memory of 3120	4980	Null menu.exe	89
PID 4980 wrote to memory of 3120	4980	Null menu.exe	89
PID 4980 wrote to memory of 5004	4980	Null menu.exe	91
PID 4980 wrote to memory of 5004	4980	Null menu.exe	91
PID 4980 wrote to memory of 888	4980	Null menu.exe	94
PID 4980 wrote to memory of 888	4980	Null menu.exe	94
PID 4980 wrote to memory of 4272	4980	Null menu.exe	96
PID 4980 wrote to memory of 4272	4980	Null menu.exe	96
PID 4980 wrote to memory of 4304	4980	Null menu.exe	102
PID 4980 wrote to memory of 4304	4980	Null menu.exe	102

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\Null menu.exe
"C:\Users\Admin\AppData\Local\Temp\Null menu.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:4980
- 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\Null menu.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3120
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Null menu.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5004
- 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\System User'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:888
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System User'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4272
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System User" /tr "C:\Users\Admin\AppData\Roaming\System User"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4304

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4236,i,10369132178352108590,11047993562598554317,262144 --variations-seed-version --mojo-platform-channel-handle=4100 /prefetch:8
1⤵
PID:5076

C:\Users\Admin\AppData\Roaming\System User
"C:\Users\Admin\AppData\Roaming\System User"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2772

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

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
a2c8179aaa149c0b9791b73ce44c04d1

SHA1
703361b0d43ec7f669304e7c0ffbbfdeb1e484ff

SHA256
c1d30342a40a2b6e7553da30ceb85754d33820f6fbb3bbbed1ceb30d6390de4a

SHA512
2e201dd457d055baad86f68c15bcc7beb48d6dc2ffc10db7f304eb93f697e7b45991cbde857d25da2c9c60c23f3e13df8b5ed5809c1753737a23096e296cc9e3

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

Filesize
944B

MD5
cbdffa194488cd855e9e9e211b9eff31

SHA1
6f92feda2163675cad96ce3ac30d794fea604679

SHA256
eaa903540fc85e825457bb504206b118f4fb46e6a27bb15e9debf633f9aaa05a

SHA512
0263a66d01cdb986630ad93472c86aadfaeceee70662077ee21979eba3a796f884bf64b7dc8fdae9c35c8832237104b45dd87b433db3c0146425b4e911332e0d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xggw2q4f.dvt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\System User

Filesize
484KB

MD5
cc5fdd81e44d6b85b629544133820a27

SHA1
d5e8421ac31abddd23f2b00841d2ed5f671d2670

SHA256
685247d0074365beb7fdd3942878bdf2fce06e7b1049f5cc803a50fa4e757d91

SHA512
398b99025320847042717fcfb5a6f9b15f95583a7304f4e8315c1746c58ed46083cf133d9893ee6d187068a4c98216c15af6d010ec84119bc3fb9e8bcabde9e4

Download Submit
memory/3120-12-0x00007FFFB0070000-0x00007FFFB0B31000-memory.dmp

Filesize
10.8MB

Download
memory/3120-17-0x00007FFFB0070000-0x00007FFFB0B31000-memory.dmp

Filesize
10.8MB

Download
memory/3120-14-0x00007FFFB0070000-0x00007FFFB0B31000-memory.dmp

Filesize
10.8MB

Download
memory/3120-13-0x00007FFFB0070000-0x00007FFFB0B31000-memory.dmp

Filesize
10.8MB

Download
memory/3120-4-0x0000021938470000-0x0000021938492000-memory.dmp

Filesize
136KB

Download
memory/4980-0-0x00007FFFB0073000-0x00007FFFB0075000-memory.dmp

Filesize
8KB

Download
memory/4980-55-0x00007FFFB0073000-0x00007FFFB0075000-memory.dmp

Filesize
8KB

Download
memory/4980-56-0x00007FFFB0070000-0x00007FFFB0B31000-memory.dmp

Filesize
10.8MB

Download
memory/4980-57-0x00007FFFB0070000-0x00007FFFB0B31000-memory.dmp

Filesize
10.8MB

Download
memory/4980-1-0x00000000003B0000-0x000000000042E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads