xworm | 49baec577965e592ac1b646cbc8a669ad597bfc1c3bac56dbf5ae414a79f1c24

Resubmissions

15/06/2024, 11:10

240615-m9r1lasblj

15/06/2024, 11:05

240615-m7acrssanr10

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15/06/2024, 11:05

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General

Target
Yandex Music.exe
Size 135KB
Sample240615-m7acrssanr
SHA256 49baec577965e592ac1b646cbc8a669ad597bfc1c3bac56dbf5ae414a79f1c24
MD5 dd5b316ece86e5b0c359ba72434c1db8
SHA1 55d021a330376a0255b9a4dbc421f1398e620e23
SHA512 fc897f4e8ce6ab650714344201634eff390dd307beb802df204fea7e46aa0acac1f7651493a18ce4df73299dbbb169a70d0b91fdf168beb01cfb120f8afbb5af
SSDEEP 1536:OHAVA/86aWGnjCqbYRZXxjP6kyCOcB7pSJM80:OOUDenbYRvtOc7IJ4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

may-transmit.gl.at.ply.gg:23184

Attributes

Install_directory
%ProgramData%
install_file
Svchost.exe
telegram
https://api.telegram.org/bot7326165458:AAF0gY0Qscv_8uQayegKSn1pMCW9SfL7V9I/sendMessage?chat_id=1299170167

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1748-1-0x0000000000620000-0x0000000000648000-memory.dmp	family_xworm
behavioral2/files/0x0009000000022ac3-58.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
4960	powershell.exe
840	powershell.exe
4796	powershell.exe
880	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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Yandex Music.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
5032	Svchost.exe
3488	Svchost.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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Svchost = "C:\\ProgramData\\Svchost.exe"	Yandex Music.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
2	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1780	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4960	powershell.exe
4960	powershell.exe
840	powershell.exe
840	powershell.exe
4796	powershell.exe
4796	powershell.exe
880	powershell.exe
880	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1748	Yandex Music.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	840	powershell.exe
Token: SeDebugPrivilege	4796	powershell.exe
Token: SeDebugPrivilege	880	powershell.exe
Token: SeDebugPrivilege	1748	Yandex Music.exe
Token: SeDebugPrivilege	5032	Svchost.exe
Token: SeDebugPrivilege	3488	Svchost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 4960	1748	Yandex Music.exe	88
PID 1748 wrote to memory of 4960	1748	Yandex Music.exe	88
PID 1748 wrote to memory of 840	1748	Yandex Music.exe	90
PID 1748 wrote to memory of 840	1748	Yandex Music.exe	90
PID 1748 wrote to memory of 4796	1748	Yandex Music.exe	92
PID 1748 wrote to memory of 4796	1748	Yandex Music.exe	92
PID 1748 wrote to memory of 880	1748	Yandex Music.exe	94
PID 1748 wrote to memory of 880	1748	Yandex Music.exe	94
PID 1748 wrote to memory of 1780	1748	Yandex Music.exe	96
PID 1748 wrote to memory of 1780	1748	Yandex Music.exe	96

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\Yandex Music.exe
"C:\Users\Admin\AppData\Local\Temp\Yandex Music.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1748
- 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\Yandex Music.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4960
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Yandex Music.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:840
- 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'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:880
- 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"
  2⤵
  - Creates scheduled task(s)
  PID:1780

C:\ProgramData\Svchost.exe
C:\ProgramData\Svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5032

C:\ProgramData\Svchost.exe
C:\ProgramData\Svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Svchost.exe

Path C:\ProgramData\Svchost.exe
Size 135KB
SHA256 49baec577965e592ac1b646cbc8a669ad597bfc1c3bac56dbf5ae414a79f1c24
MD5 dd5b316ece86e5b0c359ba72434c1db8
SHA1 55d021a330376a0255b9a4dbc421f1398e620e23
SHA512 fc897f4e8ce6ab650714344201634eff390dd307beb802df204fea7e46aa0acac1f7651493a18ce4df73299dbbb169a70d0b91fdf168beb01cfb120f8afbb5af
SSDEEP 1536:OHAVA/86aWGnjCqbYRZXxjP6kyCOcB7pSJM80:OOUDenbYRvtOc7IJ4
MD5 SHA1 SHA512 SSDEEP

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Svchost.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Svchost.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 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1
MD5 ba169f4dcbbf147fe78ef0061a95e83b
SHA1 92a571a6eef49fff666e0f62a3545bcd1cdcda67
SHA512 8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 347338241585c510bb1fafae13447879318610ca4d844b0e73089957911d77fe
MD5 4178a021dab6578724f63a6a72b9b13b
SHA1 8e5d61c21edaafe4e2257ebe53f9b37b723838b7
SHA512 0f49991948129415c2a02298072055d4de521e4a8cb9ae887bb2096683668fcb491b99d58fd6e239463a5ac981d756c4b2827cb52c1e1253b9cb114095e140c9
MD5 SHA1 SHA512

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__PSScriptPolicyTest_pcxu1n2j.yve.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pcxu1n2j.yve.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1748-0-0x00007FF89DDC3000-0x00007FF89DDC5000-memory.dmp

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memory/1748-57-0x00007FF89DDC0000-0x00007FF89E881000-memory.dmp

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memory/1748-2-0x00007FF89DDC0000-0x00007FF89E881000-memory.dmp

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memory/1748-1-0x0000000000620000-0x0000000000648000-memory.dmp

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memory/4960-15-0x00007FF89DDC0000-0x00007FF89E881000-memory.dmp

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memory/4960-18-0x00007FF89DDC0000-0x00007FF89E881000-memory.dmp

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memory/4960-14-0x000001A9CB900000-0x000001A9CB922000-memory.dmp

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memory/4960-13-0x00007FF89DDC0000-0x00007FF89E881000-memory.dmp

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memory/4960-12-0x00007FF89DDC0000-0x00007FF89E881000-memory.dmp

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