f255227fd45316c4681085f39e6da2f509af851f8cc2d2a84ea99c06b935ffe6

Resubmissions

22-08-2024 18:43

240822-xc563asamh 10

21-08-2024 17:16

30-06-2024 00:59

20-06-2024 02:02

20-06-2024 01:44

19-06-2024 01:10

18-06-2024 20:40

18-06-2024 13:45

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
18-06-2024 20:40

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General

Target

Documents/Ransomware.Matsnu/Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
Size

102KB
MD5

1b2d2a4b97c7c2727d571bbf9376f54f
SHA1

1fc29938ec5c209ba900247d2919069b320d33b0
SHA256

7634433f8fcf4d13fb46d680802e48eeb160e0f51e228cae058436845976381e
SHA512

506fc96423e5e2e38078806591e09a6eb3cf924eb748af528f7315aa0b929890823798a3ef2a5809c14023c3ff8a3db36277bc90c7b099218422aafa4e0c2ee0
SSDEEP

1536:jj+Rj1lGIXKSmE17v97yiqHGMRPtbsLW8/V2k12v1/BDxVyCfCrCAc:jjw6Sf0iqmMnb2W02v3mCf4Nc

Score

7^/10

persistence upx

Malware Config

Signatures

Deletes itself 1 IoCs

Processes:

explorer.exe

pid process

1940 explorer.exe
Executes dropped EXE 2 IoCs

Processes:

wczkcirnyb.prewczkcirnyb.pre

pid process

2956 wczkcirnyb.pre
2908 wczkcirnyb.pre
Loads dropped DLL 3 IoCs

Processes:

explorer.exewczkcirnyb.pre

pid process

1940 explorer.exe
1940 explorer.exe
2956 wczkcirnyb.pre

pid	process
1940	explorer.exe

pid	process
2956	wczkcirnyb.pre
2908	wczkcirnyb.pre

pid	process
1940	explorer.exe
1940	explorer.exe
2956	wczkcirnyb.pre

UPX packed file 9 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral7/memory/804-4-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/804-12-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/804-13-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/804-11-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/804-8-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/804-2-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/804-10-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/2908-42-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral7/memory/2908-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000\Software\Microsoft\Windows\CurrentVersion\Run\uxlknbyw = "C:\\Users\\Admin\\AppData\\Roaming\\Pixpf\\flgonbyw.exe"	svchost.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exewczkcirnyb.pre

description	pid	process	target process
PID 1704 set thread context of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 2956 set thread context of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exeMatsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exeexplorer.exewczkcirnyb.prewczkcirnyb.pre

description	pid	process	target process
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 1704 wrote to memory of 804	1704	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 804 wrote to memory of 1940	804	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	explorer.exe
PID 804 wrote to memory of 1940	804	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	explorer.exe
PID 804 wrote to memory of 1940	804	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	explorer.exe
PID 804 wrote to memory of 1940	804	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	explorer.exe
PID 804 wrote to memory of 1940	804	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	explorer.exe
PID 1940 wrote to memory of 2956	1940	explorer.exe	wczkcirnyb.pre
PID 1940 wrote to memory of 2956	1940	explorer.exe	wczkcirnyb.pre
PID 1940 wrote to memory of 2956	1940	explorer.exe	wczkcirnyb.pre
PID 1940 wrote to memory of 2956	1940	explorer.exe	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2956 wrote to memory of 2908	2956	wczkcirnyb.pre	wczkcirnyb.pre
PID 2908 wrote to memory of 2468	2908	wczkcirnyb.pre	svchost.exe
PID 2908 wrote to memory of 2468	2908	wczkcirnyb.pre	svchost.exe
PID 2908 wrote to memory of 2468	2908	wczkcirnyb.pre	svchost.exe
PID 2908 wrote to memory of 2468	2908	wczkcirnyb.pre	svchost.exe
PID 2908 wrote to memory of 2468	2908	wczkcirnyb.pre	svchost.exe

C:\Users\Admin\AppData\Local\Temp\Documents\Ransomware.Matsnu\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
"C:\Users\Admin\AppData\Local\Temp\Documents\Ransomware.Matsnu\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Users\Admin\AppData\Local\Temp\Documents\Ransomware.Matsnu\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
  "C:\Users\Admin\AppData\Local\Temp\Documents\Ransomware.Matsnu\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Windows\SysWOW64\explorer.exe
    explorer.exe
    3⤵
    - Deletes itself
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1940
  - - C:\Users\Admin\AppData\Local\Temp\wczkcirnyb.pre
      C:\Users\Admin\AppData\Local\Temp\wczkcirnyb.pre
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2956
    - - C:\Users\Admin\AppData\Local\Temp\wczkcirnyb.pre
        
        C:\Users\Admin\AppData\Local\Temp\wczkcirnyb.pre
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:2908
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        Adds Run key to start application
        
        PID:2468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\wczkcirnyb.pre

Filesize
102KB

MD5
1b2d2a4b97c7c2727d571bbf9376f54f

SHA1
1fc29938ec5c209ba900247d2919069b320d33b0

SHA256
7634433f8fcf4d13fb46d680802e48eeb160e0f51e228cae058436845976381e

SHA512
506fc96423e5e2e38078806591e09a6eb3cf924eb748af528f7315aa0b929890823798a3ef2a5809c14023c3ff8a3db36277bc90c7b099218422aafa4e0c2ee0

Download Submit
memory/804-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-13-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/804-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/804-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1940-19-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/1940-15-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/1940-14-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2468-56-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2468-47-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2468-50-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2468-51-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2908-42-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2908-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download