Malware Analysis Report

2024-11-16 13:40

Sample ID 240531-rcsm3sag8x
Target NursultanLoader.rar
SHA256 7f7c3b09b23a4147f13f38fcb8592fc2a86db49ee51b580e52641693382b0a6d
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7f7c3b09b23a4147f13f38fcb8592fc2a86db49ee51b580e52641693382b0a6d

Threat Level: Known bad

The file NursultanLoader.rar was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm

Xworm family

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 14:03

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: behavioral2

Detonation Overview

Submitted

2024-05-31 14:03

Reported

2024-05-31 14:05

Platform

win11-20240426-en

Max time kernel

91s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe"

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\Expensive 3.1 = "C:\\Users\\Admin\\AppData\\Roaming\\Expensive 3.1.exe" C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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\NursultanLoader.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe

"C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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\NursultanLoader.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'NursultanLoader.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\Roaming\Expensive 3.1.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Expensive 3.1.exe'

Network

Country Destination Domain Proto
US 8.8.8.8:53 loss-winners.gl.at.ply.gg udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/1716-1-0x0000000000B60000-0x0000000000B76000-memory.dmp

memory/1716-0-0x00007FFB23273000-0x00007FFB23275000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cfueik5e.fdj.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3476-10-0x0000025E7B7C0000-0x0000025E7B7E2000-memory.dmp

memory/3476-11-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

memory/3476-12-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

memory/3476-13-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

memory/3476-14-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

memory/3476-15-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

memory/3476-18-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

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

MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

MD5 2e8eb51096d6f6781456fef7df731d97
SHA1 ec2aaf851a618fb43c3d040a13a71997c25bda43
SHA256 96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864
SHA512 0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

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

MD5 4093e5ab3812960039eba1a814c2ffb0
SHA1 b5e4a98a80be72fccd3cc910e93113d2febef298
SHA256 c0794e2b7036ce5612446a8b15e0c8387773bbc921f63cf8849f8a1f4ef3878c
SHA512 f3555b45aa1a1dd5214716dc81a05905c4ecd5a3e1276d35e08c65623ab1d14d469b3b576a5d9638264c1222d73889d2cc1ee43fb579d9ca3fcddd9f557cac7b

memory/1716-51-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

memory/1716-52-0x00007FFB23270000-0x00007FFB23D32000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-31 14:03

Reported

2024-05-31 14:06

Platform

win10v2004-20240426-en

Max time kernel

92s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Expensive 3.1 = "C:\\Users\\Admin\\AppData\\Roaming\\Expensive 3.1.exe" C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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\NursultanLoader.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe

"C:\Users\Admin\AppData\Local\Temp\NursultanLoader.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\NursultanLoader.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'NursultanLoader.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\Roaming\Expensive 3.1.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Expensive 3.1.exe'

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 160.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 loss-winners.gl.at.ply.gg udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/3840-0-0x00007FFE318E3000-0x00007FFE318E5000-memory.dmp

memory/3840-1-0x0000000000210000-0x0000000000226000-memory.dmp

memory/3056-2-0x000001D04EA60000-0x000001D04EA82000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lea1hkn3.noq.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3056-12-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

memory/3056-13-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

memory/3056-14-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

memory/3056-17-0x00007FFE318E0000-0x00007FFE323A1000-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 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

MD5 d8cb3e9459807e35f02130fad3f9860d
SHA1 5af7f32cb8a30e850892b15e9164030a041f4bd6
SHA256 2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68
SHA512 045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

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

MD5 a7cc007980e419d553568a106210549a
SHA1 c03099706b75071f36c3962fcc60a22f197711e0
SHA256 a5735921fc72189c8bf577f3911486cf031708dc8d6bc764fe3e593c0a053165
SHA512 b9aaf29403c467daef80a1ae87478afc33b78f4e1ca16189557011bb83cf9b3e29a0f85c69fa209c45201fb28baca47d31756eee07b79c6312c506e8370f7666

memory/3840-53-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

memory/3840-54-0x00007FFE318E3000-0x00007FFE318E5000-memory.dmp

memory/3840-55-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp