c2bf26d1b3a311be1bec839ca7c26bf2c944fd79333485a271230ec435c318dd

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 20:19

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General

Target

Ransomware/Matsnu.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

pid	Process
2676	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
2280	wuxkfdmndc.pre
2432	wuxkfdmndc.pre

Loads dropped DLL 3 IoCs

pid	Process
2676	svchost.exe
2676	svchost.exe
2280	wuxkfdmndc.pre

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral19/memory/2016-2-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-4-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-8-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-10-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-11-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-13-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-12-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2016-14-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral19/memory/2432-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1650401615-1019878084-3673944445-1000\Software\Microsoft\Windows\CurrentVersion\Run\mwebnxbv = "C:\\Users\\Admin\\AppData\\Roaming\\Dyyuk\\ozoqnnxbv.exe"	svchost.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2492 set thread context of 2016	2492	Matsnu.exe	28
PID 2280 set thread context of 2432	2280	wuxkfdmndc.pre	31

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2492 wrote to memory of 2016	2492	Matsnu.exe	28
PID 2016 wrote to memory of 2676	2016	Matsnu.exe	29
PID 2016 wrote to memory of 2676	2016	Matsnu.exe	29
PID 2016 wrote to memory of 2676	2016	Matsnu.exe	29
PID 2016 wrote to memory of 2676	2016	Matsnu.exe	29
PID 2016 wrote to memory of 2676	2016	Matsnu.exe	29
PID 2676 wrote to memory of 2280	2676	svchost.exe	30
PID 2676 wrote to memory of 2280	2676	svchost.exe	30
PID 2676 wrote to memory of 2280	2676	svchost.exe	30
PID 2676 wrote to memory of 2280	2676	svchost.exe	30
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2280 wrote to memory of 2432	2280	wuxkfdmndc.pre	31
PID 2432 wrote to memory of 2440	2432	wuxkfdmndc.pre	32
PID 2432 wrote to memory of 2440	2432	wuxkfdmndc.pre	32
PID 2432 wrote to memory of 2440	2432	wuxkfdmndc.pre	32
PID 2432 wrote to memory of 2440	2432	wuxkfdmndc.pre	32
PID 2432 wrote to memory of 2440	2432	wuxkfdmndc.pre	32

C:\Users\Admin\AppData\Local\Temp\Ransomware\Matsnu.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\Matsnu.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Users\Admin\AppData\Local\Temp\Ransomware\Matsnu.exe
  "C:\Users\Admin\AppData\Local\Temp\Ransomware\Matsnu.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2016
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - Deletes itself
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2676
  - - C:\Users\Admin\AppData\Local\Temp\wuxkfdmndc.pre
      C:\Users\Admin\AppData\Local\Temp\wuxkfdmndc.pre
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2280
    - - C:\Users\Admin\AppData\Local\Temp\wuxkfdmndc.pre
        
        C:\Users\Admin\AppData\Local\Temp\wuxkfdmndc.pre
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:2432
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        Adds Run key to start application
        
        PID:2440

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

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Downloads

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

Filesize
102KB

MD5
1b2d2a4b97c7c2727d571bbf9376f54f

SHA1
1fc29938ec5c209ba900247d2919069b320d33b0

SHA256
7634433f8fcf4d13fb46d680802e48eeb160e0f51e228cae058436845976381e

SHA512
506fc96423e5e2e38078806591e09a6eb3cf924eb748af528f7315aa0b929890823798a3ef2a5809c14023c3ff8a3db36277bc90c7b099218422aafa4e0c2ee0

Download Submit
memory/2016-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2016-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-13-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2016-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2432-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2440-47-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2440-50-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2440-51-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2440-57-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2676-19-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2676-16-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2676-28-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2676-15-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads