xworm | 0b6f399b1b5e976944d903b553343fa00c0af1dacecfcb161b7018c3282c8c8d

General

Target

Sukioshe.API.bat
Size

102KB
MD5

378a551aa3a4c5e0adec167eaa224b24
SHA1

0f55fd5a8bae0149321975f44599314ca96d954d
SHA256

0b6f399b1b5e976944d903b553343fa00c0af1dacecfcb161b7018c3282c8c8d
SHA512

a291af2e59ac3db474a6139b6ce2d672d6c556a61bc7ec0360e32565d93c5a1d8c71b7306826232fb78749b6b0a72787763b7ca94e2cda38b0afbcb9ab0e890e
SSDEEP

1536:y1YNBiAGQ4g3JGPFSutTsn5zr73oWiA6WwprhyIha1CjRAoH28oKN34rmeeS3BQe:Hf0Qn3CFSutIHwp9yJCj+oWC45eWKe

Score

10^/10

xworm defense_evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

45.88.91.101:7000

Attributes

Install_directory
%AppData%
install_file
win32.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0003000000022b54-4.dat	family_xworm
behavioral2/memory/2328-7-0x0000000000ED0000-0x0000000000EE8000-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
1384	powershell.exe
2076	powershell.exe
3552	powershell.exe
376	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-1-5-21-1161330783-2912525651-1278508834-1000\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\win32.lnk	embedded.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win32.lnk	embedded.exe

Executes dropped EXE 3 IoCs

pid	Process
2328	embedded.exe
4116	win32.exe
3812	win32.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-1-5-21-1161330783-2912525651-1278508834-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\win32 = "C:\\Users\\Admin\\AppData\\Roaming\\win32.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
3988	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
2792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2076	powershell.exe
2076	powershell.exe
3552	powershell.exe
3552	powershell.exe
376	powershell.exe
376	powershell.exe
1384	powershell.exe
1384	powershell.exe
2328	embedded.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	embedded.exe
Token: SeDebugPrivilege	2076	powershell.exe
Token: SeDebugPrivilege	3552	powershell.exe
Token: SeDebugPrivilege	376	powershell.exe
Token: SeDebugPrivilege	1384	powershell.exe
Token: SeDebugPrivilege	2328	embedded.exe
Token: SeDebugPrivilege	4116	win32.exe
Token: SeDebugPrivilege	3812	win32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2328	embedded.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 3988	4068	cmd.exe	89
PID 4068 wrote to memory of 3988	4068	cmd.exe	89
PID 4068 wrote to memory of 2328	4068	cmd.exe	90
PID 4068 wrote to memory of 2328	4068	cmd.exe	90
PID 2328 wrote to memory of 2076	2328	embedded.exe	96
PID 2328 wrote to memory of 2076	2328	embedded.exe	96
PID 2328 wrote to memory of 3552	2328	embedded.exe	98
PID 2328 wrote to memory of 3552	2328	embedded.exe	98
PID 2328 wrote to memory of 376	2328	embedded.exe	100
PID 2328 wrote to memory of 376	2328	embedded.exe	100
PID 2328 wrote to memory of 1384	2328	embedded.exe	102
PID 2328 wrote to memory of 1384	2328	embedded.exe	102
PID 2328 wrote to memory of 2792	2328	embedded.exe	104
PID 2328 wrote to memory of 2792	2328	embedded.exe	104

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\Sukioshe.API.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4068
- 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:3988
- 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:2328
- - 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:2076
- - 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:3552
- - 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\win32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:376
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'win32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1384
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "win32" /tr "C:\Users\Admin\AppData\Roaming\win32.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2792

C:\Users\Admin\AppData\Roaming\win32.exe
C:\Users\Admin\AppData\Roaming\win32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4116

C:\Users\Admin\AppData\Roaming\win32.exe
C:\Users\Admin\AppData\Roaming\win32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3812

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\CLR_v4.0\UsageLogs\win32.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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
4165c906a376e655973cef247b5128f1

SHA1
c6299b6ab8b2db841900de376e9c4d676d61131e

SHA256
fb0b3c822d300abbb892e6f218d6b4b62b80bb26d9184d1f4c731600053a3fc4

SHA512
15783f2d3687388339c06423bd18c17a5704cd367bf1a1d08e436088984c0b5c52dc88d3b8455495a8051ba9f977aae34b69453e5ee252d928e74dcdebd4a11a

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

Filesize
944B

MD5
09c40d1a114dc5a068e680ab67a5824c

SHA1
3c9d360d5c34638e4e3de3417c7f7f1b47e48eee

SHA256
b159c5c30b0f5143289d8c655f7fa9ecc04d102e5a5ce760772309c1892175a7

SHA512
795244bf21786e16a2f4843db7db27bc938d25fe50fa71665163fe55f65de6cfae5e7351dc3779291205541379a47726e13081ae7e1dbde89742f47e94eef602

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mzlyyqvi.cws.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
93KB

MD5
1295e2412bafad04d40296c30e863a57

SHA1
510bd48bb534ed067c4173c3f101652b97d70c81

SHA256
940c1d404fb9824f5c2f549098c99e4001fd8dd60ca47ea2d7d9aeff9654f533

SHA512
51fb977c758466d08d53875e0eecde03b98015b98843756975739019d4e0b5ed2b632f56b2d719bd4f53c9aeb6576315f910079a1a20876ed7279b6bef80f18c

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

Filesize
69KB

MD5
6ce124f705bb296be16f329d0e4be099

SHA1
f7c01f22ecbfae4e6f2c297c29770b52d2db3ad9

SHA256
43c7837200a3d03c1de24f2be3d7ea78921296c01dcd74177dfb1b8a0e505440

SHA512
48cad8c2494b021c81d8549c53a1ab015195081afe90c781a6bda56dbcd9242035dd634ec08579ae73ad0bac8a2e383c3eeee94f5cd629f8111a638d05f4067a

Download Submit
memory/2076-17-0x000002387CDA0000-0x000002387CDC2000-memory.dmp

Filesize
136KB

Download
memory/2328-7-0x0000000000ED0000-0x0000000000EE8000-memory.dmp

Filesize
96KB

Download
memory/2328-6-0x00007FFCA43C3000-0x00007FFCA43C5000-memory.dmp

Filesize
8KB

Download
memory/2328-58-0x00007FFCA43C0000-0x00007FFCA4E81000-memory.dmp

Filesize
10.8MB

Download
memory/2328-59-0x00007FFCA43C3000-0x00007FFCA43C5000-memory.dmp

Filesize
8KB

Download
memory/2328-60-0x00007FFCA43C0000-0x00007FFCA4E81000-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