xworm | bb6ebd1e6609ffd3ca442aa965cebdab07071715abef65b46e145ad1f700a2d6

General

Target

fsdjgfsdhnfgsd.bat
Size

65KB
MD5

e6ee7aca370346191e07ae542b95cb8c
SHA1

0a2376a42bd1639cab1909e22ad423a4cefab293
SHA256

bb6ebd1e6609ffd3ca442aa965cebdab07071715abef65b46e145ad1f700a2d6
SHA512

7583d3b036ed7bd23f480772fb6f2f70acca8f01be0b6a2a45eb1d7887d38060c2e49435a1e04db8a3a6f06d5200b794bd604559576b6310618607837614cf4a
SSDEEP

1536:ypDhvQgdHQgXro4uFtnqK00ZVrKt1ag2pN7Gop:yXE4uFkKLkanNSop

Score

10^/10

xworm defense_evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

45.144.212.242:7000

Mutex

GHrcTVoc3c8G04bh

Attributes

Install_directory
%AppData%
install_file
SubDir.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000023d01-4.dat	family_xworm
behavioral1/memory/3272-7-0x0000000000BC0000-0x0000000000BD2000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
1032	powershell.exe
4972	powershell.exe
2840	powershell.exe
4860	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-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	embedded.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
3272	embedded.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-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SubDir = "C:\\Users\\Admin\\AppData\\Roaming\\SubDir.exe"	embedded.exe

Deobfuscate/Decode Files or Information 1 TTPs 1 IoCs

Payload decoded via CertUtil.

defense_evasion

Deobfuscate/Decode Files or Information

T1140

pid	Process
1828	certutil.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1032	powershell.exe
1032	powershell.exe
4972	powershell.exe
4972	powershell.exe
2840	powershell.exe
2840	powershell.exe
4860	powershell.exe
4860	powershell.exe
3272	embedded.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	embedded.exe
Token: SeDebugPrivilege	1032	powershell.exe
Token: SeDebugPrivilege	4972	powershell.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	4860	powershell.exe
Token: SeDebugPrivilege	3272	embedded.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3272	embedded.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 1828	1628	cmd.exe	85
PID 1628 wrote to memory of 1828	1628	cmd.exe	85
PID 1628 wrote to memory of 3272	1628	cmd.exe	87
PID 1628 wrote to memory of 3272	1628	cmd.exe	87
PID 3272 wrote to memory of 1032	3272	embedded.exe	96
PID 3272 wrote to memory of 1032	3272	embedded.exe	96
PID 3272 wrote to memory of 4972	3272	embedded.exe	98
PID 3272 wrote to memory of 4972	3272	embedded.exe	98
PID 3272 wrote to memory of 2840	3272	embedded.exe	101
PID 3272 wrote to memory of 2840	3272	embedded.exe	101
PID 3272 wrote to memory of 4860	3272	embedded.exe	104
PID 3272 wrote to memory of 4860	3272	embedded.exe	104
PID 3272 wrote to memory of 1816	3272	embedded.exe	106
PID 3272 wrote to memory of 1816	3272	embedded.exe	106

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:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\fsdjgfsdhnfgsd.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\system32\certutil.exe
  certutil -decode "C:\Users\Admin\AppData\Local\Temp\embedded.b64" "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
  2⤵
  - Deobfuscate/Decode Files or Information
  PID:1828
- C:\Users\Admin\AppData\Local\Temp\embedded.exe
  "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3272
- - 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\embedded.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1032
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'embedded.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4972
- - 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\SubDir.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2840
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SubDir.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4860
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SubDir" /tr "C:\Users\Admin\AppData\Roaming\SubDir.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Deobfuscate/Decode Files or Information

Modify Registry

Credential Access

Discovery

Query Registry

2

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
d86b8114a57359bf23d2e444afc7631a

SHA1
82e919d0488bc7370b314238714b157bda17bb29

SHA256
6db38b824708ca4941c346bc955932a600106779231b6c11014b09f254dcddde

SHA512
500703320464e78af9790c1425ad59d230686d3c0fc1840d9d17d12dc69c849c2256960a08bd1d77f300814f89b0a343dea659e5a56b6fe435137fe136bc077d

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

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hvegcihs.dy1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\embedded.b64

Filesize
59KB

MD5
476b3a0d11e655cba521f65a6fb7ccf5

SHA1
ac7f49b99763623d027c1304a49e1e45919d3f4b

SHA256
38d8568e0998d1d0c7e2db397e789e47b2a23ff5aad08997bfa07c467b19653e

SHA512
5d0b9ae14ffaa6adcc5be48abc42cdf02b7f46a90233f4b5993ff986bec7998b51a6ff0132b780e12a907c031a03661a59ee44649d32e79f17b3d8697e64f849

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

Filesize
43KB

MD5
f730dc4b0cebd71d388820cfa959cc25

SHA1
4a9513caec0e605309770c20e983d400e0246d51

SHA256
24472004e0e2f6bd1e9205c4d16138bb5bf8e482e91400dcb137db4099e582ea

SHA512
b5bbdc24b8c4a984b069cceaee04beb6441891ba9723ad0af5e2fd93abaa320dda385f67844d6827c186bd9594fe04b93cfa2a9aa1a4ed6ff61969875a273deb

Download Submit
memory/1032-13-0x000001F931190000-0x000001F9311B2000-memory.dmp

Filesize
136KB

Download
memory/1032-20-0x000001F9311C0000-0x000001F9313DC000-memory.dmp

Filesize
2.1MB

Download
memory/3272-7-0x0000000000BC0000-0x0000000000BD2000-memory.dmp

Filesize
72KB

Download
memory/3272-6-0x00007FFC60563000-0x00007FFC60565000-memory.dmp

Filesize
8KB

Download
memory/3272-59-0x00007FFC60560000-0x00007FFC61021000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads