xworm | 6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675

Analysis

max time kernel
145s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13/11/2024, 23:10

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General

Target
6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Size 298KB
Sample241113-25myea1dkh
SHA256 6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675
MD5 d908287270d335c7367de6fb6fa3fc88
SHA1 bc824dfb5b888d7a2f9dcd4eee6c70a4b60d6fc1
SHA512 0a591375294b4cccc619a7a9fd4edcc25c5ddaade7e08225b63e03ecef3b6124580366c8b8552744e60572cbcfc9ad759b16a1b8487feadc5ac73c48185d2012
SSDEEP 3072:pzFFqjpK3+yPKbWNtYjV/cPftqOjD1G3F/ibuNL:pzFFSKOyybWrYjOPFj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

127.0.0.1:1604

Attributes

Install_directory
%AppData%
install_file
System.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4260-1-0x00000000001D0000-0x0000000000220000-memory.dmp	family_xworm
behavioral2/files/0x0010000000023b46-59.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
3244	powershell.exe
2388	powershell.exe
4088	powershell.exe
548	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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.lnk	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.lnk	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Executes dropped EXE 2 IoCs

pid	Process
4484	System.exe
4128	System.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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Admin\\AppData\\Roaming\\System.exe"	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.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
14	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
4116	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3244	powershell.exe
3244	powershell.exe
2388	powershell.exe
2388	powershell.exe
4088	powershell.exe
4088	powershell.exe
548	powershell.exe
548	powershell.exe
4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Token: SeDebugPrivilege	3244	powershell.exe
Token: SeDebugPrivilege	2388	powershell.exe
Token: SeDebugPrivilege	4088	powershell.exe
Token: SeDebugPrivilege	548	powershell.exe
Token: SeDebugPrivilege	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Token: SeDebugPrivilege	4484	System.exe
Token: SeDebugPrivilege	4128	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4260 wrote to memory of 3244	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	95
PID 4260 wrote to memory of 3244	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	95
PID 4260 wrote to memory of 2388	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	97
PID 4260 wrote to memory of 2388	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	97
PID 4260 wrote to memory of 4088	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	101
PID 4260 wrote to memory of 4088	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	101
PID 4260 wrote to memory of 548	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	103
PID 4260 wrote to memory of 548	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	103
PID 4260 wrote to memory of 4116	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	105
PID 4260 wrote to memory of 4116	4260	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	105

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\6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
"C:\Users\Admin\AppData\Local\Temp\6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.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:4260
- 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\6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3244
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2388
- 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.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4088
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:548
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Admin\AppData\Roaming\System.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4116

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4484

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4128

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

System.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\System.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 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 40c6527c0a447fb33683b5577fa1c0cd6e8be07e78ff57083f6f3339519dddd7
MD5 9512d7fc6bd7fd6f9a322fa248957468
SHA1 850ce09fca7a17159c8b8ad5b2002a61ed392c3d
SHA512 5c402ac4544931469549a353d22b96ef5157d6b4dd5e71c1e93bb7f5a2ac6197eb13dc29162cfb70cbcfd814527c604b08fd02b42c5d64ad00391dd73f10c4de
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f
MD5 ef72c47dbfaae0b9b0d09f22ad4afe20
SHA1 5357f66ba69b89440b99d4273b74221670129338
SHA512 7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4
MD5 SHA1 SHA512

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__PSScriptPolicyTest_1tgvq5ht.itt.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1tgvq5ht.itt.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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System.exe

Path C:\Users\Admin\AppData\Roaming\System.exe
Size 298KB
SHA256 6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675
MD5 d908287270d335c7367de6fb6fa3fc88
SHA1 bc824dfb5b888d7a2f9dcd4eee6c70a4b60d6fc1
SHA512 0a591375294b4cccc619a7a9fd4edcc25c5ddaade7e08225b63e03ecef3b6124580366c8b8552744e60572cbcfc9ad759b16a1b8487feadc5ac73c48185d2012
SSDEEP 3072:pzFFqjpK3+yPKbWNtYjV/cPftqOjD1G3F/ibuNL:pzFFSKOyybWrYjOPFj
MD5 SHA1 SHA512 SSDEEP

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memory/3244-4-0x00007FFFD6ED0000-0x00007FFFD7991000-memory.dmp

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memory/3244-18-0x00007FFFD6ED0000-0x00007FFFD7991000-memory.dmp

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memory/3244-11-0x0000024475340000-0x0000024475362000-memory.dmp

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memory/3244-5-0x00007FFFD6ED0000-0x00007FFFD7991000-memory.dmp

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memory/3244-3-0x00007FFFD6ED0000-0x00007FFFD7991000-memory.dmp

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memory/4260-0-0x00007FFFD6ED3000-0x00007FFFD6ED5000-memory.dmp

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memory/4260-52-0x00007FFFD6ED3000-0x00007FFFD6ED5000-memory.dmp

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memory/4260-58-0x00007FFFD6ED0000-0x00007FFFD7991000-memory.dmp

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memory/4260-2-0x00007FFFD6ED0000-0x00007FFFD7991000-memory.dmp

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memory/4260-1-0x00000000001D0000-0x0000000000220000-memory.dmp

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