xworm | 8e78103cc23b15f941e8a2eee84de4ea7a37bcb33a894396e62291bbc9bcc5ac

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
01/06/2024, 11:45

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General

Target
amph_64.exe
Size 69KB
Sample240601-nwry4sbe4w
SHA256 8e78103cc23b15f941e8a2eee84de4ea7a37bcb33a894396e62291bbc9bcc5ac
MD5 02c6422cfbb7ddc7cf39f5754c6bdd4d
SHA1 0860f4fab529dea7165b1f42177d03ebc68d99c8
SHA512 bab1141231427e9f4b8fdce4d396886bc499d9b5beeaee2530b5e0be753fdee7899a26a11b8fe77ee24642957dd5a48795a18ff304ce815b0a1f2c93c14281fd
SSDEEP 1536:bTFDY91Kiiaz2ai5p6hKNLbqVeBKf65dOYXBFG9:b1G1HTSaup6hubqgKYOYXfG9
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

provides-reduces.gl.at.ply.gg:6197

Attributes

Install_directory
%AppData%
install_file
Antimalware Service Executable.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000E70000-0x0000000000E88000-memory.dmp	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
4428	powershell.exe
2604	powershell.exe
3060	powershell.exe
2300	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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	amph_64.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Antimalware Service Executable.lnk	amph_64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Antimalware Service Executable.lnk	amph_64.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
20	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4428	powershell.exe
4428	powershell.exe
2604	powershell.exe
2604	powershell.exe
3060	powershell.exe
3060	powershell.exe
2300	powershell.exe
2300	powershell.exe
4564	amph_64.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4564	amph_64.exe
Token: SeDebugPrivilege	4428	powershell.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	3060	powershell.exe
Token: SeDebugPrivilege	2300	powershell.exe
Token: SeDebugPrivilege	4564	amph_64.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4564	amph_64.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 4428	4564	amph_64.exe	91
PID 4564 wrote to memory of 4428	4564	amph_64.exe	91
PID 4564 wrote to memory of 2604	4564	amph_64.exe	93
PID 4564 wrote to memory of 2604	4564	amph_64.exe	93
PID 4564 wrote to memory of 3060	4564	amph_64.exe	96
PID 4564 wrote to memory of 3060	4564	amph_64.exe	96
PID 4564 wrote to memory of 2300	4564	amph_64.exe	98
PID 4564 wrote to memory of 2300	4564	amph_64.exe	98

C:\Users\Admin\AppData\Local\Temp\amph_64.exe
"C:\Users\Admin\AppData\Local\Temp\amph_64.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4564
- 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\amph_64.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4428
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'amph_64.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2604
- 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\Antimalware Service Executable.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3060
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Antimalware Service Executable.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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 a31805264b8b13ce4145f272cb2830728c186c46e314b48514d636866217add5
MD5 5f0ddc7f3691c81ee14d17b419ba220d
SHA1 f0ef5fde8bab9d17c0b47137e014c91be888ee53
SHA512 2ce7c2a0833f581297c13dd88ccfcd36bf129d2b5d7718c52b1d67c97cbd8fc93abc085a040229a0fd712e880c690de7f6b996b0b47c46a091fabb7931be58d3
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 8313a191aa9d11cce868d95ac9a9b1609275bfe93131fcb6e547b985b0242fbe
MD5 a9293ef980c925abe33d940554ed8575
SHA1 9b6d85f2595f7fd4923f52b21ab7607279066969
SHA512 2003d90bb2bc89378ccaeb9c5edf76b2dfd93c80369d063e56141abb8d7fea6acee6a103874ab227bc1548437269c8e4ee5174bf482ecf3d66c38f3e0ba35d85
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 c88e4bbb64f7fa31429ebe82c1cf07785c44486f37576f783a26ac856e02a4eb
MD5 9bc110200117a3752313ca2acaf8a9e1
SHA1 fda6b7da2e7b0175b391475ca78d1b4cf2147cd3
SHA512 1f1af32aa18a8cbfcc65b0d4fb7e6ca2705f125eaa85789e981ee68b90c64522e954825abf460d4b4f97567715dfae8d9b0a25a4d54d10bc4c257c472f2e80fb
MD5 SHA1 SHA512

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__PSScriptPolicyTest_vc11f1jx.xiz.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vc11f1jx.xiz.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/4428-3-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

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memory/4428-14-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

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memory/4428-17-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

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memory/4428-13-0x000001F76B490000-0x000001F76B4B2000-memory.dmp

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memory/4564-0-0x0000000000E70000-0x0000000000E88000-memory.dmp

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memory/4564-2-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

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memory/4564-1-0x00007FFDB32A3000-0x00007FFDB32A5000-memory.dmp

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memory/4564-56-0x00007FFDB32A3000-0x00007FFDB32A5000-memory.dmp

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memory/4564-57-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

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