xworm | d59be31a606192749c0cc0f10b44634ef7179879b35cf793b0dfba49a1cc26cf

General

Target

abc123.exe
Size

83KB
MD5

0798a032d370abb2458879df8a21f705
SHA1

95a5377e329928b082aac355dd3b2269b14587a1
SHA256

d59be31a606192749c0cc0f10b44634ef7179879b35cf793b0dfba49a1cc26cf
SHA512

6a97631532d3785936b5640f3f8e0fa8b08c3b0f890323f82c82e5c99111bec86b683668afa7676bf0e251e2e8823758c64aa7c1c289e83f79a2e08d2ca2ace0
SSDEEP

1536:sGv5xf2AzeoV+vy+UrY45fb28flEzY/LT6kv2NOzXl3ZjJY1aoA:zxfnzadYY4pb28fP/LJv2NOz13ZlfoA

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

IrinaCalzadilla-37039.portmap.host:37039

Attributes

Install_directory
%ProgramData%
install_file
System32.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/436-1-0x0000000000460000-0x000000000047A000-memory.dmp	family_xworm
behavioral2/files/0x000c000000023469-58.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
4804	powershell.exe
1540	powershell.exe
3192	powershell.exe
2680	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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	abc123.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System32.lnk	abc123.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System32.lnk	abc123.exe

Executes dropped EXE 3 IoCs

pid	Process
4496	System32.exe
368	System32.exe
4248	System32.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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System32 = "C:\\ProgramData\\System32.exe"	abc123.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
2572	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
436	abc123.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1540	powershell.exe
1540	powershell.exe
3192	powershell.exe
3192	powershell.exe
2680	powershell.exe
2680	powershell.exe
4804	powershell.exe
4804	powershell.exe
436	abc123.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	436	abc123.exe
Token: SeDebugPrivilege	1540	powershell.exe
Token: SeDebugPrivilege	3192	powershell.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	4804	powershell.exe
Token: SeDebugPrivilege	436	abc123.exe
Token: SeDebugPrivilege	4496	System32.exe
Token: SeDebugPrivilege	368	System32.exe
Token: SeDebugPrivilege	4248	System32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
436	abc123.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 1540	436	abc123.exe	90
PID 436 wrote to memory of 1540	436	abc123.exe	90
PID 436 wrote to memory of 3192	436	abc123.exe	93
PID 436 wrote to memory of 3192	436	abc123.exe	93
PID 436 wrote to memory of 2680	436	abc123.exe	95
PID 436 wrote to memory of 2680	436	abc123.exe	95
PID 436 wrote to memory of 4804	436	abc123.exe	97
PID 436 wrote to memory of 4804	436	abc123.exe	97
PID 436 wrote to memory of 2572	436	abc123.exe	99
PID 436 wrote to memory of 2572	436	abc123.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\abc123.exe
"C:\Users\Admin\AppData\Local\Temp\abc123.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:436
- 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\abc123.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1540
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'abc123.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3192
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\System32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2680
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4804
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System32" /tr "C:\ProgramData\System32.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2572

C:\ProgramData\System32.exe
C:\ProgramData\System32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4496

C:\ProgramData\System32.exe
C:\ProgramData\System32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:368

C:\ProgramData\System32.exe
C:\ProgramData\System32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4248

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:\ProgramData\System32.exe

Filesize
83KB

MD5
0798a032d370abb2458879df8a21f705

SHA1
95a5377e329928b082aac355dd3b2269b14587a1

SHA256
d59be31a606192749c0cc0f10b44634ef7179879b35cf793b0dfba49a1cc26cf

SHA512
6a97631532d3785936b5640f3f8e0fa8b08c3b0f890323f82c82e5c99111bec86b683668afa7676bf0e251e2e8823758c64aa7c1c289e83f79a2e08d2ca2ace0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\System32.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

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

Filesize
944B

MD5
668bd4b5d0a5b40d43d1f84ada148b8f

SHA1
f24c96d46c15265c4ef0492dc4219719fd8f0eee

SHA256
c1883e330bd3a2ec64cb91ea67e4ab6e05de947535a9cf029b722fd7cc91d58d

SHA512
6803457260b634d142ddd1e2ff9d0ba132418797c09ea5c722ae0e5cfc0e691b8038d1bfd62822ff17a996871e6ad78eabcf67e5ffbabf332f6fa299fa2a6445

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2hzceujg.1rj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/436-1-0x0000000000460000-0x000000000047A000-memory.dmp

Filesize
104KB

Download
memory/436-2-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download
memory/436-0-0x00007FFE4D593000-0x00007FFE4D595000-memory.dmp

Filesize
8KB

Download
memory/436-62-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download
memory/436-61-0x00007FFE4D593000-0x00007FFE4D595000-memory.dmp

Filesize
8KB

Download
memory/1540-9-0x000001ACF5860000-0x000001ACF5882000-memory.dmp

Filesize
136KB

Download
memory/1540-19-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download
memory/1540-16-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download
memory/1540-15-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download
memory/1540-14-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download
memory/1540-3-0x00007FFE4D590000-0x00007FFE4E051000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads