xworm | c9616db331e3194dce2010d0ee4be7525b83e5761dad9af507035e9a3ef89a8e

General

Target

System.exe
Size

76KB
MD5

926f40028aab7e451391a2f0a1f19878
SHA1

3154d7a394ab28b112813e1e2da05571d5f73610
SHA256

c9616db331e3194dce2010d0ee4be7525b83e5761dad9af507035e9a3ef89a8e
SHA512

ed7ef5b89abfe6dfe68e7c365ae4a5925a57e3a470f64714a6614f1ca80746e70ef73bbb2fef56d8ee3123c4066acc5678c7dc629995f42178a65d53cf3ac18f
SSDEEP

1536:eryUJOfxZ+3NZuLtK4q5KKI+bsjI3Bb9J6rJMtOGGL8LnV:Qyk9YxaXI+bsUgSOGGL8bV

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:51984

distribution-devoted.gl.at.ply.gg:51984

Attributes

Install_directory
%Public%
install_file
System.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/5016-0-0x00000000004A0000-0x00000000004BA000-memory.dmp	family_xworm
behavioral2/files/0x0016000000023a14-57.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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	System.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
4536	System.exe
4972	System.exe
4528	System.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-1-5-21-3726321484-1950364574-433157660-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Public\\System.exe"	System.exe

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
392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1296	powershell.exe
1296	powershell.exe
4464	powershell.exe
4464	powershell.exe
680	powershell.exe
680	powershell.exe
2972	powershell.exe
2972	powershell.exe
5016	System.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	System.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeDebugPrivilege	4464	powershell.exe
Token: SeDebugPrivilege	680	powershell.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	5016	System.exe
Token: SeDebugPrivilege	4536	System.exe
Token: SeDebugPrivilege	4972	System.exe
Token: SeDebugPrivilege	4528	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5016	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 1296	5016	System.exe	87
PID 5016 wrote to memory of 1296	5016	System.exe	87
PID 5016 wrote to memory of 4464	5016	System.exe	89
PID 5016 wrote to memory of 4464	5016	System.exe	89
PID 5016 wrote to memory of 680	5016	System.exe	91
PID 5016 wrote to memory of 680	5016	System.exe	91
PID 5016 wrote to memory of 2972	5016	System.exe	93
PID 5016 wrote to memory of 2972	5016	System.exe	93
PID 5016 wrote to memory of 392	5016	System.exe	95
PID 5016 wrote to memory of 392	5016	System.exe	95

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\System.exe
"C:\Users\Admin\AppData\Local\Temp\System.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5016
- 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\System.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1296
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4464
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\System.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:680
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2972
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Public\System.exe"
  2⤵
  - Creates scheduled task(s)
  PID:392

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4536

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4972

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\System.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
120c6c9af4de2accfcff2ed8c3aab1af

SHA1
504f64ae4ac9c4fe308a6a50be24fe464f3dad95

SHA256
461315e4057c3fa4d0031df3f7e6511914f082698b6c41f5c2ada831ceffb222

SHA512
041712168718dff702da8203b4089b2e57db98ce503b8ecf36809dec0cd7a595a0d427caa960bc1bd29cbedc85ad3262773f2077a476b85aca387d48f7b07ba2

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

Filesize
944B

MD5
b1a1d8b05525b7b0c5babfd80488c1f2

SHA1
c85bbd6b7d0143676916c20fd52720499c2bb5c6

SHA256
adad192fc86c2f939fd3f70cb9ad323139a4e100f7c90b4454e2c53bdbc9b705

SHA512
346c6513c1373bab58439e37d3f75de1c5c587d7eb27076cf696e885a027b3b38d70b585839d1a2e7f2270cdcf0dac8c1fdff799f3b1158242ae9e3364c2a06e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1fr21ddm.kx0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Public\System.exe

Filesize
76KB

MD5
926f40028aab7e451391a2f0a1f19878

SHA1
3154d7a394ab28b112813e1e2da05571d5f73610

SHA256
c9616db331e3194dce2010d0ee4be7525b83e5761dad9af507035e9a3ef89a8e

SHA512
ed7ef5b89abfe6dfe68e7c365ae4a5925a57e3a470f64714a6614f1ca80746e70ef73bbb2fef56d8ee3123c4066acc5678c7dc629995f42178a65d53cf3ac18f

Download Submit
memory/1296-13-0x000002F47E080000-0x000002F47E090000-memory.dmp

Filesize
64KB

Download
memory/1296-17-0x00007FFBCE870000-0x00007FFBCF331000-memory.dmp

Filesize
10.8MB

Download
memory/1296-12-0x000002F47D9A0000-0x000002F47D9C2000-memory.dmp

Filesize
136KB

Download
memory/1296-14-0x000002F47E080000-0x000002F47E090000-memory.dmp

Filesize
64KB

Download
memory/1296-2-0x00007FFBCE870000-0x00007FFBCF331000-memory.dmp

Filesize
10.8MB

Download
memory/5016-0-0x00000000004A0000-0x00000000004BA000-memory.dmp

Filesize
104KB

Download
memory/5016-56-0x000000001B170000-0x000000001B180000-memory.dmp

Filesize
64KB

Download
memory/5016-59-0x00007FFBCE870000-0x00007FFBCF331000-memory.dmp

Filesize
10.8MB

Download
memory/5016-1-0x00007FFBCE870000-0x00007FFBCF331000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads