d4c83205cf6f3098ab6a757312525f4d14a57a819306eeea5c0d022b00b38cf3

General

Target

Automatic_converter_rff_to_mp4.exe
Size

322KB
MD5

1b4f89bdb12a349de92ca7f1261e67a0
SHA1

f368916850332757d7ed2f0ee335c16b9c9fc95b
SHA256

d4c83205cf6f3098ab6a757312525f4d14a57a819306eeea5c0d022b00b38cf3
SHA512

f2f7985fbf462bc35e099b58308ddef91320d3d81040f77e7c1c0a3cfc3a4da50c849efd0f063c839848a80927398cc24bc8368d5b0b92014abe2ea7bdc2ddeb
SSDEEP

6144:iibVlHNEHBpDDf2vfQ21NV0zUiCqWjH6YPON9q:igtCpPfGfZSWPf

Score

10^/10

discovery evasion exploit persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "empty"	WormLocker2.0.exe

Disables Task Manager via registry modification
evasion

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
2628	takeown.exe
1484	icacls.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	Automatic_converter_rff_to_mp4.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	WormLocker2.0.exe

Executes dropped EXE 1 IoCs

pid	Process
1720	WormLocker2.0.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2628	takeown.exe
1484	icacls.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\LogonUIinf.exe	Automatic_converter_rff_to_mp4.exe
File opened for modification	C:\Windows\System32\ransom_voice.vbs	Automatic_converter_rff_to_mp4.exe
File opened for modification	C:\Windows\System32\WormLocker2.0.exe	Automatic_converter_rff_to_mp4.exe
File created	C:\Windows\System32\LogonUItrue.exe	Automatic_converter_rff_to_mp4.exe
File opened for modification	C:\Windows\System32\LogonUItrue.exe	Automatic_converter_rff_to_mp4.exe
File created	C:\Windows\System32\LogonUI.exe	Automatic_converter_rff_to_mp4.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000_Classes\Local Settings	WormLocker2.0.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1720	WormLocker2.0.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeTakeOwnershipPrivilege	2628	takeown.exe
Token: SeDebugPrivilege	1720	WormLocker2.0.exe
Token: 33	4452	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4452	AUDIODG.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 2124	1220	Automatic_converter_rff_to_mp4.exe	84
PID 1220 wrote to memory of 2124	1220	Automatic_converter_rff_to_mp4.exe	84
PID 2124 wrote to memory of 2628	2124	cmd.exe	86
PID 2124 wrote to memory of 2628	2124	cmd.exe	86
PID 2124 wrote to memory of 1484	2124	cmd.exe	87
PID 2124 wrote to memory of 1484	2124	cmd.exe	87
PID 1220 wrote to memory of 1720	1220	Automatic_converter_rff_to_mp4.exe	94
PID 1220 wrote to memory of 1720	1220	Automatic_converter_rff_to_mp4.exe	94
PID 1720 wrote to memory of 384	1720	WormLocker2.0.exe	97
PID 1720 wrote to memory of 384	1720	WormLocker2.0.exe	97

C:\Users\Admin\AppData\Local\Temp\Automatic_converter_rff_to_mp4.exe
"C:\Users\Admin\AppData\Local\Temp\Automatic_converter_rff_to_mp4.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32 && icacls C:\Windows\System32 /grant "%username%:F"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2124
- - C:\Windows\system32\takeown.exe
    takeown /f C:\Windows\System32
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:2628
- - C:\Windows\system32\icacls.exe
    icacls C:\Windows\System32 /grant "Admin:F"
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1484
- C:\Windows\System32\WormLocker2.0.exe
  "C:\Windows\System32\WormLocker2.0.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1720
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Windows\System32\ransom_voice.vbs"
    3⤵
    PID:384

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x440 0x2f8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4452

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Speech\Files\UserLexicons\SP_6CCA938CF0E94F99BD45D1A826208B9A.dat

Filesize
940B

MD5
2cf7241566e2c9da80ed5ebceae6ed29

SHA1
812988494fc394190ac99b18e53145543d6672c4

SHA256
b9493cc46823f22b4ea7222040035fdf834d860166532e55a110e3ee51b284ed

SHA512
c424a4a44e58a71b7204f75e9c211f57260e6067aa4c537648533329855e1359939243cd4266ad3f78a6dcc1c8cd68bc2aa448d9c5775559f22f2eeabb3c4019

Download Submit
C:\Windows\System32\WormLocker2.0.exe

Filesize
116KB

MD5
041aa5e99ae545dac5f9306bb20d869e

SHA1
88ea126645bfd418abba44cca4a16adf12084d2f

SHA256
830c271c8aca775457a090a51c93ad08f9665361eeeaa3fda3f9ae032202ad73

SHA512
4b8007dddd519c77bb596f6d17f270da62b236894b6fd7f1c528e553b1aac3a7f9c0df4bb40b678461f70bde3c5a8ac4b5e97e5372dd127a8184862c7f6f4c7c

Download Submit
C:\Windows\System32\WormLocker2.0.exe

Filesize
116KB

MD5
041aa5e99ae545dac5f9306bb20d869e

SHA1
88ea126645bfd418abba44cca4a16adf12084d2f

SHA256
830c271c8aca775457a090a51c93ad08f9665361eeeaa3fda3f9ae032202ad73

SHA512
4b8007dddd519c77bb596f6d17f270da62b236894b6fd7f1c528e553b1aac3a7f9c0df4bb40b678461f70bde3c5a8ac4b5e97e5372dd127a8184862c7f6f4c7c

Download Submit
C:\Windows\System32\WormLocker2.0.exe

Filesize
116KB

MD5
041aa5e99ae545dac5f9306bb20d869e

SHA1
88ea126645bfd418abba44cca4a16adf12084d2f

SHA256
830c271c8aca775457a090a51c93ad08f9665361eeeaa3fda3f9ae032202ad73

SHA512
4b8007dddd519c77bb596f6d17f270da62b236894b6fd7f1c528e553b1aac3a7f9c0df4bb40b678461f70bde3c5a8ac4b5e97e5372dd127a8184862c7f6f4c7c

Download Submit
C:\Windows\System32\ransom_voice.vbs

Filesize
397B

MD5
c1f9613622f740c2f00c2fa8881ba7ba

SHA1
bf3271720634bebb3c41ef2b33af525b62f931bc

SHA256
d200a1e942b8cfdcd8190d1ad59f92e27e39b919ba230f2dd88d70c3df428c7b

SHA512
49e00bb3c76f7e69818a889f045f3d3c43badf2116facccbbf69c61de19f91a42aee891b9a5b72a256453e2fc5c637adac1e354cf88e6782679afa886ad1c615

Download Submit
memory/1220-134-0x0000000001680000-0x0000000001690000-memory.dmp

Filesize
64KB

Download
memory/1220-142-0x0000000001680000-0x0000000001690000-memory.dmp

Filesize
64KB

Download
memory/1220-133-0x0000000000D80000-0x0000000000DD6000-memory.dmp

Filesize
344KB

Download
memory/1720-154-0x0000000000340000-0x0000000000362000-memory.dmp

Filesize
136KB

Download
memory/1720-227-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-160-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-223-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-224-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-158-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-225-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-159-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-231-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-232-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-155-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-235-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-236-0x000000001AF90000-0x000000001AFA0000-memory.dmp

Filesize
64KB

Download
memory/1720-239-0x000000001AC80000-0x000000001AD80000-memory.dmp

Filesize
1024KB

Download
memory/1720-242-0x000000001AC80000-0x000000001AD80000-memory.dmp

Filesize
1024KB

Download
memory/1720-243-0x000000001AC80000-0x000000001AD80000-memory.dmp

Filesize
1024KB

Download

Analysis

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