xworm | c81ae973db641e3c60912166be8979a60b95253ae290c145b9a2133ad7a2ebb8

General

Target

StupidMonkey.exe
Size

70KB
MD5

4c785ba0487bfec51faf4788d564ee9f
SHA1

786fdc994a71d7e02a556e3f720b41a096a789f5
SHA256

c81ae973db641e3c60912166be8979a60b95253ae290c145b9a2133ad7a2ebb8
SHA512

b6b7fbd58e1c3657a81d17a974fc609c1af29dab6489685d2eea5e1397e12853c17086a537f7607aef6833f358965788adc961b44eeff21530ff89f9776eee06
SSDEEP

1536:X7eLuJn1XH70d76kbDD0k2jF16K7HmTzOt5YP:X79hpb0YkbDLE57HmTzOts

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

wood-matches.gl.at.ply.gg:23086

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3612-1-0x0000000000180000-0x0000000000198000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
2752	powershell.exe
3148	powershell.exe
3448	powershell.exe
2408	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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	StupidMonkey.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client Server Runtime Process.lnk	StupidMonkey.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client Server Runtime Process.lnk	StupidMonkey.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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\ProgramData\\Client Server Runtime Process"	StupidMonkey.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
15	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4020	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2408	powershell.exe
2408	powershell.exe
2752	powershell.exe
2752	powershell.exe
3148	powershell.exe
3148	powershell.exe
3448	powershell.exe
3448	powershell.exe
3612	StupidMonkey.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3612	StupidMonkey.exe
Token: SeDebugPrivilege	2408	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	3148	powershell.exe
Token: SeDebugPrivilege	3448	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3612	StupidMonkey.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3612 wrote to memory of 2408	3612	StupidMonkey.exe	89
PID 3612 wrote to memory of 2408	3612	StupidMonkey.exe	89
PID 3612 wrote to memory of 2752	3612	StupidMonkey.exe	93
PID 3612 wrote to memory of 2752	3612	StupidMonkey.exe	93
PID 3612 wrote to memory of 3148	3612	StupidMonkey.exe	95
PID 3612 wrote to memory of 3148	3612	StupidMonkey.exe	95
PID 3612 wrote to memory of 3448	3612	StupidMonkey.exe	97
PID 3612 wrote to memory of 3448	3612	StupidMonkey.exe	97
PID 3612 wrote to memory of 4020	3612	StupidMonkey.exe	99
PID 3612 wrote to memory of 4020	3612	StupidMonkey.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\StupidMonkey.exe
"C:\Users\Admin\AppData\Local\Temp\StupidMonkey.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3612
- 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\StupidMonkey.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2408
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'StupidMonkey.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Client Server Runtime Process'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3148
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Client Server Runtime Process'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3448
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Client Server Runtime Process" /tr "C:\ProgramData\Client Server Runtime Process"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
d65ebc84c6b0b52901fb46f5e2b83ab5

SHA1
d036a0c3eb9e1616d0f7f5ca41171060c13a3095

SHA256
d45581b0807a0d04a70ec75e3e4575e73f148e5b4e0d3d325dfbd6400a4bfbd1

SHA512
88ac232e7702ebd53788cf8429d266ae367111bfccf4bc9d40ead25b552347521458ca60d320e2775b5d2edcaf8501251cb2db68b38dc000ac50463fb80865be

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

Filesize
944B

MD5
98baf5117c4fcec1692067d200c58ab3

SHA1
5b33a57b72141e7508b615e17fb621612cb8e390

SHA256
30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

SHA512
344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l3v0tq3h.dbt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2408-13-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/2408-14-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/2408-15-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/2408-18-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/2408-5-0x0000022BF6D30000-0x0000022BF6D52000-memory.dmp

Filesize
136KB

Download
memory/3612-0-0x00007FFE10933000-0x00007FFE10935000-memory.dmp

Filesize
8KB

Download
memory/3612-2-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/3612-1-0x0000000000180000-0x0000000000198000-memory.dmp

Filesize
96KB

Download
memory/3612-56-0x00007FFE10933000-0x00007FFE10935000-memory.dmp

Filesize
8KB

Download
memory/3612-57-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads