xworm | 8641f88b89c9076ece3ee571baa4b3c93ba3ac3883e90fe5f894dc41e3b7bdc7

General

Target

Ro-exec/loader-upd.exe
Size

70KB
MD5

573bd20fc8382d92a7ae9eae51e738e3
SHA1

55006093429df791f27e91a66e5ee63a81382b28
SHA256

09036ffa342f9e5bb1e31a867dcc3b60db011baba8c0d202aff1d33195cbe729
SHA512

d38736acff4128d6ce9ea17ee609ca33a37ac88f2c994cf4caf7f0eb62406a8963c33531b9f3cd020974d892c2751f3a4f67ce13ed6ba6080f97c406ccbb4aca
SSDEEP

1536:PmMfwrNATngx6fPLgD9vYebv2S5NiwWW6N9dOoihkAO:LCmn463UD6ebv242FzOoiSAO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Public%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/UWpQULMP

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral6/memory/4508-0-0x0000000000F90000-0x0000000000FA8000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	loader-upd.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-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Public\\svchost.exe"	loader-upd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
30	pastebin.com
31	pastebin.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
2592	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4508	loader-upd.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
716	powershell.exe
716	powershell.exe
3100	powershell.exe
3100	powershell.exe
3192	powershell.exe
3192	powershell.exe
2660	powershell.exe
2660	powershell.exe
4508	loader-upd.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4508	loader-upd.exe
Token: SeDebugPrivilege	716	powershell.exe
Token: SeDebugPrivilege	3100	powershell.exe
Token: SeDebugPrivilege	3192	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	4508	loader-upd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4508	loader-upd.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 716	4508	loader-upd.exe	90
PID 4508 wrote to memory of 716	4508	loader-upd.exe	90
PID 4508 wrote to memory of 3100	4508	loader-upd.exe	93
PID 4508 wrote to memory of 3100	4508	loader-upd.exe	93
PID 4508 wrote to memory of 3192	4508	loader-upd.exe	95
PID 4508 wrote to memory of 3192	4508	loader-upd.exe	95
PID 4508 wrote to memory of 2660	4508	loader-upd.exe	97
PID 4508 wrote to memory of 2660	4508	loader-upd.exe	97
PID 4508 wrote to memory of 2592	4508	loader-upd.exe	99
PID 4508 wrote to memory of 2592	4508	loader-upd.exe	99

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\Ro-exec\loader-upd.exe
"C:\Users\Admin\AppData\Local\Temp\Ro-exec\loader-upd.exe"
1⤵
- Checks computer location settings
- 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:4508
- 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\Ro-exec\loader-upd.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:716
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loader-upd.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3100
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\svchost.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3192
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Public\svchost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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
9bc110200117a3752313ca2acaf8a9e1

SHA1
fda6b7da2e7b0175b391475ca78d1b4cf2147cd3

SHA256
c88e4bbb64f7fa31429ebe82c1cf07785c44486f37576f783a26ac856e02a4eb

SHA512
1f1af32aa18a8cbfcc65b0d4fb7e6ca2705f125eaa85789e981ee68b90c64522e954825abf460d4b4f97567715dfae8d9b0a25a4d54d10bc4c257c472f2e80fb

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

Filesize
944B

MD5
b4b6d4cc52b5a3a71149b1f33d94d5de

SHA1
97d3dbdd24919eab70e3b14c68797cefc07e90dd

SHA256
da8c02ce00d5b1e6d4c3667465c7bbc14d7cd5227eb634f3d9690afd488267fe

SHA512
fc894f03709b83df7d2fca2779e1e60549078b67bcdbff0b61c8e5a802982210ae971309c1f92577573299288963ab5c95c6b38cbaedf53dc6062812c57a97af

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1y0wtr3f.yma.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/716-2-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/716-3-0x0000027DEC6B0000-0x0000027DEC6C0000-memory.dmp

Filesize
64KB

Download
memory/716-4-0x0000027DEC6B0000-0x0000027DEC6C0000-memory.dmp

Filesize
64KB

Download
memory/716-7-0x0000027DEE830000-0x0000027DEE852000-memory.dmp

Filesize
136KB

Download
memory/716-17-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/2660-48-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/2660-49-0x00000210E44E0000-0x00000210E44F0000-memory.dmp

Filesize
64KB

Download
memory/2660-62-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/2660-50-0x00000210E44E0000-0x00000210E44F0000-memory.dmp

Filesize
64KB

Download
memory/3100-32-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/3100-20-0x0000023869770000-0x0000023869780000-memory.dmp

Filesize
64KB

Download
memory/3100-19-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/3192-35-0x0000018E61F40000-0x0000018E61F50000-memory.dmp

Filesize
64KB

Download
memory/3192-47-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/3192-34-0x0000018E61F40000-0x0000018E61F50000-memory.dmp

Filesize
64KB

Download
memory/3192-33-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/4508-0-0x0000000000F90000-0x0000000000FA8000-memory.dmp

Filesize
96KB

Download
memory/4508-1-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download
memory/4508-64-0x000000001BCA0000-0x000000001BCB0000-memory.dmp

Filesize
64KB

Download
memory/4508-65-0x00007FF9B9370000-0x00007FF9B9E31000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads