Malware Analysis Report

2024-11-16 13:40

Sample ID 240531-ef8r9aec4x
Target sigmasoft-0.1xw.exe
SHA256 d1adc072119b02981f1581427259693b0e14db39e06e27daa2059259a97857d4
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d1adc072119b02981f1581427259693b0e14db39e06e27daa2059259a97857d4

Threat Level: Known bad

The file sigmasoft-0.1xw.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm family

Xworm

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Drops startup file

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 03:54

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm family

xworm

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-31 03:54

Reported

2024-05-31 03:54

Platform

win7-20240215-en

Max time kernel

34s

Max time network

26s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1764 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2576 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2616 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2616 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2616 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1764 wrote to memory of 2192 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 1764 wrote to memory of 2192 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 1764 wrote to memory of 2192 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

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\sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"

Network

Country Destination Domain Proto
N/A 127.0.0.1:42772 tcp
US 8.8.8.8:53 gorodpro-42772.portmap.host udp
DE 193.161.193.99:42772 gorodpro-42772.portmap.host tcp
N/A 127.0.0.1:42772 tcp

Files

memory/1764-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

memory/1764-1-0x0000000000AF0000-0x0000000000B0A000-memory.dmp

memory/2696-6-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2696-7-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

memory/2696-8-0x0000000001C10000-0x0000000001C18000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 2f9d23f2634a7dc1d560f019dd3bf6de
SHA1 5e02964464bd2bfb0137a0faf5e1011ec427c82c
SHA256 280d4f8adae6125caefcb7885a296a65fd3822749231b0d576b364aad8940131
SHA512 8ccca03164f30e8f650ad11b59a458ae44ca107f0cad251d3b1408ec92655a9ed88aa3f6bbfd69793399abcaacdfc5ac3ecca22f7b33210447227ab729986707

memory/2576-14-0x000000001B630000-0x000000001B912000-memory.dmp

memory/2576-15-0x00000000021D0000-0x00000000021D8000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/1764-32-0x000000001B300000-0x000000001B380000-memory.dmp

memory/1764-33-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

memory/1764-34-0x000000001B300000-0x000000001B380000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-31 03:54

Reported

2024-05-31 03:54

Platform

win10v2004-20240508-en

Max time kernel

32s

Max time network

32s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4332 wrote to memory of 4152 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 4152 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 3484 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 3484 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 4140 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 4140 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4332 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 4332 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

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\sigmasoft-0.1xw.exe'

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 --no-appcompat-clear --field-trial-handle=3148,i,1697479186275492802,18058102846092193784,262144 --variations-seed-version --mojo-platform-channel-handle=4404 /prefetch:8

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
N/A 127.0.0.1:42772 tcp
N/A 127.0.0.1:42772 tcp
US 8.8.8.8:53 gorodpro-42772.portmap.host udp
DE 193.161.193.99:42772 gorodpro-42772.portmap.host tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp

Files

memory/4332-0-0x00007FFBF8273000-0x00007FFBF8275000-memory.dmp

memory/4332-1-0x00000000003C0000-0x00000000003DA000-memory.dmp

memory/4152-4-0x000001F04C530000-0x000001F04C552000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_o0dyiny5.5ic.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4152-12-0x00007FFBF8270000-0x00007FFBF8D31000-memory.dmp

memory/4152-13-0x00007FFBF8270000-0x00007FFBF8D31000-memory.dmp

memory/4152-14-0x00007FFBF8270000-0x00007FFBF8D31000-memory.dmp

memory/4152-17-0x00007FFBF8270000-0x00007FFBF8D31000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

MD5 2979eabc783eaca50de7be23dd4eafcf
SHA1 d709ce5f3a06b7958a67e20870bfd95b83cad2ea
SHA256 006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903
SHA512 92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

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

MD5 75d224e238a397659d8e5cf458a41143
SHA1 d182d16283d3d864a2e328b677551428c29ad6df
SHA256 6a98fa5e6c5b77722f2bd8c855fd14d6bf545fc35b292252d1dc136b89ed2fee
SHA512 3477f3b4182ffdccc817de4242c8fcba706c193a0de5170cd023f8df3d330487d7e372556524b5a0fe1df56de40923700f3f8368eadf6601970e347cbcf078cc

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

MD5 50d3033f2bc3a3774c469d03e71a79a9
SHA1 22027b1d52085de99b3bffa276530fea5d961471
SHA256 2987e99ec7fa17bd4ab7de3cb4dc62645e1052012a5a357904d6fc6db9054147
SHA512 ecf7ab1a9e4192454a3e24c60453fd702a8c648e00078fc933b9182f4a3d3c10c6f5da622a5729b35727e6ddc8837029caddcaf76f56e805b9744253b56da5d8

memory/4332-56-0x00007FFBF8270000-0x00007FFBF8D31000-memory.dmp

memory/4332-57-0x00007FFBF8273000-0x00007FFBF8275000-memory.dmp

memory/4332-58-0x00007FFBF8270000-0x00007FFBF8D31000-memory.dmp