xworm | ebf760dbfa32628221a5a902ffd7e98f560d181225e260ed4326aa36aa99f659

Analysis

max time kernel
59s
max time network
65s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 09:05

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General

Target

SessionService.exe
Size

117KB
MD5

14e30c16018099515838579930a91203
SHA1

76bbf81a1b5bcab232641c190a44051252b82c2a
SHA256

66cab06a5f9a15057d4a6a7beeee553b74b039ab7e918c2435f1da68ddccc84a
SHA512

e3e599be9c51e8f5597b31f7ded0cfbfc1a748a393b16540015ea53325a04098e93dfead4b370b2dd48b2295531b3e9b3a38bf685f96a49b4fc1e6e03ce9b731
SSDEEP

1536:drOoAFyXOnznmTBw0FG51bvJB6rP06I4HwcOn10ZomIcoKCE45nHQK:5OnIYnmFg1bRgO4DOnCvIctm

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

Attributes

Install_directory
%AppData%

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral14/memory/2304-0-0x0000000000600000-0x0000000000624000-memory.dmp	family_xworm
behavioral14/files/0x0009000000023116-56.dat	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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	SessionService.exe

Executes dropped EXE 1 IoCs

pid	Process
3168	SessionService.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

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
976	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4368	powershell.exe
4368	powershell.exe
2040	powershell.exe
2040	powershell.exe
3272	powershell.exe
3272	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2304	SessionService.exe
Token: SeDebugPrivilege	4368	powershell.exe
Token: SeDebugPrivilege	2040	powershell.exe
Token: SeDebugPrivilege	3272	powershell.exe
Token: SeDebugPrivilege	3168	SessionService.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 4368	2304	SessionService.exe	85
PID 2304 wrote to memory of 4368	2304	SessionService.exe	85
PID 2304 wrote to memory of 2040	2304	SessionService.exe	87
PID 2304 wrote to memory of 2040	2304	SessionService.exe	87
PID 2304 wrote to memory of 3272	2304	SessionService.exe	89
PID 2304 wrote to memory of 3272	2304	SessionService.exe	89
PID 2304 wrote to memory of 976	2304	SessionService.exe	93
PID 2304 wrote to memory of 976	2304	SessionService.exe	93

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\SessionService.exe
"C:\Users\Admin\AppData\Local\Temp\SessionService.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2304
- 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\SessionService.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4368
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SessionService.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2040
- 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\SessionService.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3272
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SessionService" /tr "C:\Users\Admin\AppData\Roaming\SessionService.exe"
  2⤵
  - Creates scheduled task(s)
  PID:976

C:\Users\Admin\AppData\Roaming\SessionService.exe
C:\Users\Admin\AppData\Roaming\SessionService.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3168

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rwcdygtc.sla.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SessionService.exe

Filesize
117KB

MD5
14e30c16018099515838579930a91203

SHA1
76bbf81a1b5bcab232641c190a44051252b82c2a

SHA256
66cab06a5f9a15057d4a6a7beeee553b74b039ab7e918c2435f1da68ddccc84a

SHA512
e3e599be9c51e8f5597b31f7ded0cfbfc1a748a393b16540015ea53325a04098e93dfead4b370b2dd48b2295531b3e9b3a38bf685f96a49b4fc1e6e03ce9b731

Download Submit
memory/2040-22-0x000001D96C6A0000-0x000001D96C6B0000-memory.dmp

Filesize
64KB

Download
memory/2040-21-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/2040-37-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/2040-23-0x000001D96C6A0000-0x000001D96C6B0000-memory.dmp

Filesize
64KB

Download
memory/2040-35-0x000001D96C6A0000-0x000001D96C6B0000-memory.dmp

Filesize
64KB

Download
memory/2304-52-0x000000001B310000-0x000000001B320000-memory.dmp

Filesize
64KB

Download
memory/2304-0-0x0000000000600000-0x0000000000624000-memory.dmp

Filesize
144KB

Download
memory/2304-2-0x000000001B310000-0x000000001B320000-memory.dmp

Filesize
64KB

Download
memory/2304-1-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/2304-34-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/3168-58-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/3168-60-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/3272-51-0x0000016763E90000-0x0000016763EA0000-memory.dmp

Filesize
64KB

Download
memory/3272-38-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/3272-39-0x0000016763E90000-0x0000016763EA0000-memory.dmp

Filesize
64KB

Download
memory/3272-40-0x0000016763E90000-0x0000016763EA0000-memory.dmp

Filesize
64KB

Download
memory/3272-54-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/4368-19-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/4368-16-0x000001B072C50000-0x000001B072C60000-memory.dmp

Filesize
64KB

Download
memory/4368-15-0x000001B072C50000-0x000001B072C60000-memory.dmp

Filesize
64KB

Download
memory/4368-14-0x000001B072C50000-0x000001B072C60000-memory.dmp

Filesize
64KB

Download
memory/4368-6-0x00007FFE0D880000-0x00007FFE0E341000-memory.dmp

Filesize
10.8MB

Download
memory/4368-5-0x000001B074D00000-0x000001B074D22000-memory.dmp

Filesize
136KB

Download