xworm | ca1c729da918f657cd953d41416a08fa85d3577efd583fb602ef6b7cf7b73412

General

Target

Loader.exe
Size

14.9MB
MD5

99ec7ca91e0775ee4e00eb2a87864042
SHA1

de83f3e72278f93f0beccf468f7025fe675ddef1
SHA256

ca1c729da918f657cd953d41416a08fa85d3577efd583fb602ef6b7cf7b73412
SHA512

71bb4b60ded4d5b97067263a3a792d7dc09116caf264a14694607cade5d6d71951837c9d3d9a6f5e75e27059f3ad63106a4542396e2612342e78a0b5a2b98597
SSDEEP

393216:gvwqyP4/oFkLMXJOIDpGgkZ/MHIbmrB0aN77wBZFj:ujjgisB0gkZ0HfB1NwBDj

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

engineering-thoroughly.gl.at.ply.gg:30205

london-components.gl.at.ply.gg:30205

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0009000000023429-6.dat	family_xworm
behavioral1/memory/2036-17-0x00000000002E0000-0x00000000002F4000-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
4440	powershell.exe
5012	powershell.exe
4444	powershell.exe
1096	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2080292272-204036150-2159171770-1000\Control Panel\International\Geo\Nation	Loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2080292272-204036150-2159171770-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
2036	XClient.exe
3224	Celestial.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
25	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 13 IoCs

pid	Process
3224	Celestial.exe
3224	Celestial.exe
4444	powershell.exe
4444	powershell.exe
4444	powershell.exe
1096	powershell.exe
1096	powershell.exe
4440	powershell.exe
4440	powershell.exe
4440	powershell.exe
5012	powershell.exe
5012	powershell.exe
5012	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	XClient.exe
Token: SeDebugPrivilege	4444	powershell.exe
Token: SeDebugPrivilege	1096	powershell.exe
Token: SeDebugPrivilege	4440	powershell.exe
Token: SeDebugPrivilege	5012	powershell.exe
Token: SeDebugPrivilege	2036	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3224	Celestial.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 2036	4948	Loader.exe	87
PID 4948 wrote to memory of 2036	4948	Loader.exe	87
PID 4948 wrote to memory of 3224	4948	Loader.exe	90
PID 4948 wrote to memory of 3224	4948	Loader.exe	90
PID 2036 wrote to memory of 4444	2036	XClient.exe	95
PID 2036 wrote to memory of 4444	2036	XClient.exe	95
PID 2036 wrote to memory of 1096	2036	XClient.exe	97
PID 2036 wrote to memory of 1096	2036	XClient.exe	97
PID 2036 wrote to memory of 4440	2036	XClient.exe	99
PID 2036 wrote to memory of 4440	2036	XClient.exe	99
PID 2036 wrote to memory of 5012	2036	XClient.exe	102
PID 2036 wrote to memory of 5012	2036	XClient.exe	102

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Users\Admin\AppData\Local\Temp\XClient.exe
  "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2036
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4444
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1096
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4440
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5012
- C:\Users\Admin\AppData\Local\Temp\Celestial.exe
  "C:\Users\Admin\AppData\Local\Temp\Celestial.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:3224

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

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

Filesize
944B

MD5
a2c8179aaa149c0b9791b73ce44c04d1

SHA1
703361b0d43ec7f669304e7c0ffbbfdeb1e484ff

SHA256
c1d30342a40a2b6e7553da30ceb85754d33820f6fbb3bbbed1ceb30d6390de4a

SHA512
2e201dd457d055baad86f68c15bcc7beb48d6dc2ffc10db7f304eb93f697e7b45991cbde857d25da2c9c60c23f3e13df8b5ed5809c1753737a23096e296cc9e3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Celestial.exe

Filesize
16.7MB

MD5
2bb7a7cf8640666e10c8f435715e84de

SHA1
cc717620c6ab50d81ad00b3332c896551479c7c1

SHA256
9f49609bb71606a39039a6012f2a0dfbcae30432d42a7f3e515a0247dbb98186

SHA512
9aa1ae9a2d49a7e44945af1c8e21471d5355d8053734d71205744ca5a430bc23f6078a5ba745e0054fac67b898327efe54916adf19d509a4331fd610080cf6f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\XClient.exe

Filesize
58KB

MD5
38a7d3c578a960bd1d045717b822752f

SHA1
caffbb50a591cbf368f9ff1fcdf5134cf60b12c7

SHA256
cc9ebcf65f91040511bd9efa28882aec14b24f2d11aa9f789b60e01a01b913e3

SHA512
e1ac98df06407b500b21db82b045a890d6baba4c6db77603aa7598a7e2352e1cc16140ff332030bd1555e4c96e2eab630d546eed62d4e33769dc2fd91bea51ac

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4yzcm4l1.i3w.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2036-29-0x0000000000AC0000-0x0000000000AD0000-memory.dmp

Filesize
64KB

Download
memory/2036-17-0x00000000002E0000-0x00000000002F4000-memory.dmp

Filesize
80KB

Download
memory/2036-16-0x00007FFA90303000-0x00007FFA90305000-memory.dmp

Filesize
8KB

Download
memory/2036-80-0x00007FFA90303000-0x00007FFA90305000-memory.dmp

Filesize
8KB

Download
memory/2036-82-0x0000000000AC0000-0x0000000000AD0000-memory.dmp

Filesize
64KB

Download
memory/2036-83-0x0000000000AD0000-0x0000000000ADC000-memory.dmp

Filesize
48KB

Download
memory/3224-25-0x0000000140000000-0x0000000141F42000-memory.dmp

Filesize
31.3MB

Download
memory/3224-24-0x0000000140560000-0x0000000140E9D000-memory.dmp

Filesize
9.2MB

Download
memory/3224-23-0x00007FFAAE6D0000-0x00007FFAAE6D2000-memory.dmp

Filesize
8KB

Download
memory/3224-81-0x0000000140560000-0x0000000140E9D000-memory.dmp

Filesize
9.2MB

Download
memory/4444-39-0x0000024EE6960000-0x0000024EE6982000-memory.dmp

Filesize
136KB

Download

Analysis

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