xworm | 2ab6390fcc902b46d3df5107416223da2d1c275d80aab0b7b7d6c0ee8c219644

General

Target

SantosExecutorInstaller.exe
Size

136KB
MD5

2c2c3af94bc32c880278a8d8c4fa831c
SHA1

1ee1f7b2e91f66c8b79d6bb97924484580a9276d
SHA256

2ab6390fcc902b46d3df5107416223da2d1c275d80aab0b7b7d6c0ee8c219644
SHA512

7a774318d756e673ce761c480530e70f7dfa84ce7aaed162f577f19a4afa237695d9de1e1646019106ef52e8315025ec8ca9e0acd6aba13dd74773c7e9ea0efd
SSDEEP

3072:yOT7HFq9tiUOjoBz65/M6If+3Js+3JFkKeTnE:zRq9LxBt25

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

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

Mutex

OJaM16tyEwtJe5lG

Attributes

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

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/392-1-0x0000000000F70000-0x0000000000F98000-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
4108	powershell.exe
3476	powershell.exe
3528	powershell.exe
3260	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-1-5-21-3808065738-1666277613-1125846146-1000\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

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
6	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 11 IoCs

pid	Process
4108	powershell.exe
4108	powershell.exe
3476	powershell.exe
3476	powershell.exe
3476	powershell.exe
3528	powershell.exe
3528	powershell.exe
3528	powershell.exe
3260	powershell.exe
3260	powershell.exe
3260	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	392	SantosExecutorInstaller.exe
Token: SeDebugPrivilege	4108	powershell.exe
Token: SeDebugPrivilege	3476	powershell.exe
Token: SeDebugPrivilege	3528	powershell.exe
Token: SeDebugPrivilege	3260	powershell.exe
Token: SeDebugPrivilege	392	SantosExecutorInstaller.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 392 wrote to memory of 4108	392	SantosExecutorInstaller.exe	93
PID 392 wrote to memory of 4108	392	SantosExecutorInstaller.exe	93
PID 392 wrote to memory of 3476	392	SantosExecutorInstaller.exe	95
PID 392 wrote to memory of 3476	392	SantosExecutorInstaller.exe	95
PID 392 wrote to memory of 3528	392	SantosExecutorInstaller.exe	97
PID 392 wrote to memory of 3528	392	SantosExecutorInstaller.exe	97
PID 392 wrote to memory of 3260	392	SantosExecutorInstaller.exe	99
PID 392 wrote to memory of 3260	392	SantosExecutorInstaller.exe	99

C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:392
- 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:4108
- 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:3476
- 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:3528
- 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:3260

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 --mojo-platform-channel-handle=1340 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:3988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

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\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
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

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

Filesize
944B

MD5
ef72c47dbfaae0b9b0d09f22ad4afe20

SHA1
5357f66ba69b89440b99d4273b74221670129338

SHA256
692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f

SHA512
7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4

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

Filesize
944B

MD5
f0a41fc9c1123bb127e55ecc66c8f052

SHA1
57152411758fa3df2623cc8a4df6d9fea73652f8

SHA256
a4fe2be2c449e841f6a12d32114672b097fc1058b6f2971a03521220a0228745

SHA512
e3e967adac361ddcf8240cf641f3e77eacfefc61dec725b8ae12e6a94f7d2ebd937fb9eb3cd068a0b3d4306e163dc87773b322bc2dd8b7df93b8103d0e99a900

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tbln5n5w.0jz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/392-1-0x0000000000F70000-0x0000000000F98000-memory.dmp

Filesize
160KB

Download
memory/392-2-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/392-60-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/392-0-0x00007FFBEE9A3000-0x00007FFBEE9A5000-memory.dmp

Filesize
8KB

Download
memory/392-59-0x00007FFBEE9A3000-0x00007FFBEE9A5000-memory.dmp

Filesize
8KB

Download
memory/4108-4-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/4108-20-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/4108-17-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/4108-16-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/4108-15-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/4108-14-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/4108-3-0x000001F6FE1D0000-0x000001F6FE1F2000-memory.dmp

Filesize
136KB

Download

Analysis

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