xworm | ebf760dbfa32628221a5a902ffd7e98f560d181225e260ed4326aa36aa99f659

Analysis

max time kernel
61s
max time network
60s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 3 IoCs

resource	yara_rule
behavioral13/memory/2192-0-0x0000000001370000-0x0000000001394000-memory.dmp	family_xworm
behavioral13/files/0x000b000000003687-45.dat	family_xworm
behavioral13/memory/1020-47-0x0000000000CB0000-0x0000000000CD4000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Executes dropped EXE 1 IoCs

pid	Process
1020	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
4	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
2972	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2724	powershell.exe
2736	powershell.exe
1376	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2192	SessionService.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	1376	powershell.exe
Token: SeDebugPrivilege	1020	SessionService.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 2724	2192	SessionService.exe	29
PID 2192 wrote to memory of 2724	2192	SessionService.exe	29
PID 2192 wrote to memory of 2724	2192	SessionService.exe	29
PID 2192 wrote to memory of 2736	2192	SessionService.exe	31
PID 2192 wrote to memory of 2736	2192	SessionService.exe	31
PID 2192 wrote to memory of 2736	2192	SessionService.exe	31
PID 2192 wrote to memory of 1376	2192	SessionService.exe	33
PID 2192 wrote to memory of 1376	2192	SessionService.exe	33
PID 2192 wrote to memory of 1376	2192	SessionService.exe	33
PID 2192 wrote to memory of 2972	2192	SessionService.exe	36
PID 2192 wrote to memory of 2972	2192	SessionService.exe	36
PID 2192 wrote to memory of 2972	2192	SessionService.exe	36
PID 2788 wrote to memory of 1020	2788	taskeng.exe	40
PID 2788 wrote to memory of 1020	2788	taskeng.exe	40
PID 2788 wrote to memory of 1020	2788	taskeng.exe	40

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⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2192
- 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:2724
- 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:2736
- 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:1376
- 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:2972

C:\Windows\system32\taskeng.exe
taskeng.exe {5C12DD97-7FB2-4D4D-BB83-4648CCADA7BE} S-1-5-21-3308111660-3636268597-2291490419-1000:JUBFGPHD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2788
- C:\Users\Admin\AppData\Roaming\SessionService.exe
  C:\Users\Admin\AppData\Roaming\SessionService.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1020

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\J1LY0SUNBZXBI47COSDO.temp

Filesize
7KB

MD5
70f072a5ca300ec666711299cc0cd6ad

SHA1
6dc738fe226f3ebf69a2844d1ec3446eb3f2d3e0

SHA256
b56a3c077289930335df4869f2cb631a2371e0f000f6dfd4d9f5ee3c323642a0

SHA512
7ee4d1db10c0edd6571b428769cbd82988d5b91c5cd25429f76b81581f0781346d40fd7d93cfb797cb1ecc321fd44dbd1dd2f06834fe74287fdd5b9a0592a933

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

Filesize
117KB

MD5
14e30c16018099515838579930a91203

SHA1
76bbf81a1b5bcab232641c190a44051252b82c2a

SHA256
66cab06a5f9a15057d4a6a7beeee553b74b039ab7e918c2435f1da68ddccc84a

SHA512
e3e599be9c51e8f5597b31f7ded0cfbfc1a748a393b16540015ea53325a04098e93dfead4b370b2dd48b2295531b3e9b3a38bf685f96a49b4fc1e6e03ce9b731

Download Submit
memory/1020-48-0x000007FEF6150000-0x000007FEF6B3C000-memory.dmp

Filesize
9.9MB

Download
memory/1020-47-0x0000000000CB0000-0x0000000000CD4000-memory.dmp

Filesize
144KB

Download
memory/1020-49-0x000007FEF6150000-0x000007FEF6B3C000-memory.dmp

Filesize
9.9MB

Download
memory/1376-39-0x000000000296B000-0x00000000029D2000-memory.dmp

Filesize
412KB

Download
memory/1376-35-0x000007FEEEC90000-0x000007FEEF62D000-memory.dmp

Filesize
9.6MB

Download
memory/1376-36-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1376-38-0x0000000002964000-0x0000000002967000-memory.dmp

Filesize
12KB

Download
memory/1376-37-0x000007FEEEC90000-0x000007FEEF62D000-memory.dmp

Filesize
9.6MB

Download
memory/1376-41-0x000007FEEEC90000-0x000007FEEF62D000-memory.dmp

Filesize
9.6MB

Download
memory/2192-2-0x000000001B2B0000-0x000000001B330000-memory.dmp

Filesize
512KB

Download
memory/2192-1-0x000007FEF6150000-0x000007FEF6B3C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-40-0x000007FEF6150000-0x000007FEF6B3C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-0-0x0000000001370000-0x0000000001394000-memory.dmp

Filesize
144KB

Download
memory/2192-43-0x000000001B2B0000-0x000000001B330000-memory.dmp

Filesize
512KB

Download
memory/2724-12-0x0000000002440000-0x00000000024C0000-memory.dmp

Filesize
512KB

Download
memory/2724-15-0x000007FEEEC90000-0x000007FEEF62D000-memory.dmp

Filesize
9.6MB

Download
memory/2724-7-0x000000001B170000-0x000000001B452000-memory.dmp

Filesize
2.9MB

Download
memory/2724-9-0x000007FEEEC90000-0x000007FEEF62D000-memory.dmp

Filesize
9.6MB

Download
memory/2724-10-0x0000000002440000-0x00000000024C0000-memory.dmp

Filesize
512KB

Download
memory/2724-8-0x0000000002880000-0x0000000002888000-memory.dmp

Filesize
32KB

Download
memory/2724-11-0x000007FEEEC90000-0x000007FEEF62D000-memory.dmp

Filesize
9.6MB

Download
memory/2724-13-0x0000000002440000-0x00000000024C0000-memory.dmp

Filesize
512KB

Download
memory/2724-14-0x0000000002440000-0x00000000024C0000-memory.dmp

Filesize
512KB

Download
memory/2736-29-0x000007FEEE2F0000-0x000007FEEEC8D000-memory.dmp

Filesize
9.6MB

Download
memory/2736-21-0x000000001B220000-0x000000001B502000-memory.dmp

Filesize
2.9MB

Download
memory/2736-23-0x000007FEEE2F0000-0x000007FEEEC8D000-memory.dmp

Filesize
9.6MB

Download
memory/2736-24-0x0000000002550000-0x00000000025D0000-memory.dmp

Filesize
512KB

Download
memory/2736-22-0x0000000002320000-0x0000000002328000-memory.dmp

Filesize
32KB

Download
memory/2736-25-0x000007FEEE2F0000-0x000007FEEEC8D000-memory.dmp

Filesize
9.6MB

Download
memory/2736-28-0x0000000002550000-0x00000000025D0000-memory.dmp

Filesize
512KB

Download
memory/2736-26-0x0000000002550000-0x00000000025D0000-memory.dmp

Filesize
512KB

Download
memory/2736-27-0x0000000002550000-0x00000000025D0000-memory.dmp

Filesize
512KB

Download