xworm | 84ed4eecc481a190525ff964da9b2e17eb46b5cd6c45d2c602c5216099e91675

General

Target

SantosExecutorInstaller.exe
Size

161KB
MD5

d8a8dc5751ec1e003029b24096414d84
SHA1

e5d475f57565aca29bf2111bb123434b66093d8d
SHA256

84ed4eecc481a190525ff964da9b2e17eb46b5cd6c45d2c602c5216099e91675
SHA512

02ae89407380a0adffb05a256e65c3330d4b67463835f43bf036a06398e6a0bcf9afc0724769862209e854fbe7d4c067563c2b26a970214341162b4ed489f41f
SSDEEP

3072:eZJHbIqVRWOnhzBz65/M6If+3Js+3JFkKeTnE:SJHbBxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

introduction-specifications.gl.at.ply.gg:47117

Attributes

Install_directory
%Userprofile%
install_file
svchost.exe
telegram
https://api.telegram.org/bot7098399942:AAGbBTQcHRRS0fdzPhkmgHxFxRybEnM_OnM

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3236-1-0x0000000000340000-0x000000000036E000-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
2636	powershell.exe
1424	powershell.exe
1044	powershell.exe
2388	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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	SantosExecutorInstaller.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	SantosExecutorInstaller.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	SantosExecutorInstaller.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-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\svchost.exe"	SantosExecutorInstaller.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
8	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 8 IoCs

pid	Process
2388	powershell.exe
2388	powershell.exe
2636	powershell.exe
2636	powershell.exe
1424	powershell.exe
1424	powershell.exe
1044	powershell.exe
1044	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3236	SantosExecutorInstaller.exe
Token: SeDebugPrivilege	2388	powershell.exe
Token: SeDebugPrivilege	2636	powershell.exe
Token: SeDebugPrivilege	1424	powershell.exe
Token: SeDebugPrivilege	1044	powershell.exe
Token: SeDebugPrivilege	3236	SantosExecutorInstaller.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3236 wrote to memory of 2388	3236	SantosExecutorInstaller.exe	90
PID 3236 wrote to memory of 2388	3236	SantosExecutorInstaller.exe	90
PID 3236 wrote to memory of 2636	3236	SantosExecutorInstaller.exe	93
PID 3236 wrote to memory of 2636	3236	SantosExecutorInstaller.exe	93
PID 3236 wrote to memory of 1424	3236	SantosExecutorInstaller.exe	95
PID 3236 wrote to memory of 1424	3236	SantosExecutorInstaller.exe	95
PID 3236 wrote to memory of 1044	3236	SantosExecutorInstaller.exe	97
PID 3236 wrote to memory of 1044	3236	SantosExecutorInstaller.exe	97

C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3236
- 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\SantosExecutorInstaller.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2388
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SantosExecutorInstaller.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1424
- 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:1044

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4268,i,18168883380598738769,14202261231630113808,262144 --variations-seed-version --mojo-platform-channel-handle=1040 /prefetch:8
1⤵
PID:4508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

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\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
dbb22d95851b93abf2afe8fb96a8e544

SHA1
920ec5fdb323537bcf78f7e29a4fc274e657f7a4

SHA256
e1ee9af6b9e3bfd41b7d2c980580bb7427883f1169ed3df4be11293ce7895465

SHA512
16031134458bf312509044a3028be46034c544163c4ca956aee74d2075fbeb5873754d2254dc1d0b573ce1a644336ac4c8bd7147aba100bfdac8c504900ef3fc

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_unw2hcwi.huo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2388-8-0x000002640FB10000-0x000002640FB32000-memory.dmp

Filesize
136KB

Download
memory/2388-10-0x00007FFCC2C30000-0x00007FFCC36F1000-memory.dmp

Filesize
10.8MB

Download
memory/2388-14-0x00007FFCC2C30000-0x00007FFCC36F1000-memory.dmp

Filesize
10.8MB

Download
memory/2388-15-0x00007FFCC2C30000-0x00007FFCC36F1000-memory.dmp

Filesize
10.8MB

Download
memory/2388-17-0x00007FFCC2C30000-0x00007FFCC36F1000-memory.dmp

Filesize
10.8MB

Download
memory/3236-0-0x00007FFCC2C33000-0x00007FFCC2C35000-memory.dmp

Filesize
8KB

Download
memory/3236-2-0x00007FFCC2C30000-0x00007FFCC36F1000-memory.dmp

Filesize
10.8MB

Download
memory/3236-1-0x0000000000340000-0x000000000036E000-memory.dmp

Filesize
184KB

Download
memory/3236-55-0x00007FFCC2C33000-0x00007FFCC2C35000-memory.dmp

Filesize
8KB

Download
memory/3236-56-0x00007FFCC2C30000-0x00007FFCC36F1000-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