xworm | 6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675

General

Target

6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Size

298KB
MD5

d908287270d335c7367de6fb6fa3fc88
SHA1

bc824dfb5b888d7a2f9dcd4eee6c70a4b60d6fc1
SHA256

6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675
SHA512

0a591375294b4cccc619a7a9fd4edcc25c5ddaade7e08225b63e03ecef3b6124580366c8b8552744e60572cbcfc9ad759b16a1b8487feadc5ac73c48185d2012
SSDEEP

3072:pzFFqjpK3+yPKbWNtYjV/cPftqOjD1G3F/ibuNL:pzFFSKOyybWrYjOPFj

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

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

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\System.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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
9512d7fc6bd7fd6f9a322fa248957468

SHA1
850ce09fca7a17159c8b8ad5b2002a61ed392c3d

SHA256
40c6527c0a447fb33683b5577fa1c0cd6e8be07e78ff57083f6f3339519dddd7

SHA512
5c402ac4544931469549a353d22b96ef5157d6b4dd5e71c1e93bb7f5a2ac6197eb13dc29162cfb70cbcfd814527c604b08fd02b42c5d64ad00391dd73f10c4de

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

Filesize
944B

MD5
ef72c47dbfaae0b9b0d09f22ad4afe20

SHA1
5357f66ba69b89440b99d4273b74221670129338

SHA256
692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f

SHA512
7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1tgvq5ht.itt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\System.exe

Filesize
298KB

MD5
d908287270d335c7367de6fb6fa3fc88

SHA1
bc824dfb5b888d7a2f9dcd4eee6c70a4b60d6fc1

SHA256
6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675

SHA512
0a591375294b4cccc619a7a9fd4edcc25c5ddaade7e08225b63e03ecef3b6124580366c8b8552744e60572cbcfc9ad759b16a1b8487feadc5ac73c48185d2012

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

Filesize
10.8MB

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

Filesize
10.8MB

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

Filesize
136KB

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

Filesize
10.8MB

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

Filesize
10.8MB

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

Filesize
8KB

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

Filesize
8KB

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

Filesize
10.8MB

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

Filesize
10.8MB

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

Filesize
320KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads