bab1853454ca6fdd3acd471254101db1b805b601e309a49ec7b4b1fbcfc47ad7

Resubmissions

01-03-2024 20:38

240301-ze5pesdb79 3

01-03-2024 20:03

240301-ysybtsce5x 3

01-03-2024 18:44

240301-xdmfcabg67 3

01-03-2024 17:56

240301-wjhhxabb92 10

Analysis

max time kernel
118s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01-03-2024 17:56

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General

Target

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:

svchost.exe

pid process

2660 svchost.exe
Executes dropped EXE 2 IoCs

Processes:

ebxkklyrnz.preebxkklyrnz.pre

pid process

2844 ebxkklyrnz.pre
2488 ebxkklyrnz.pre
Loads dropped DLL 3 IoCs

Processes:

svchost.exeebxkklyrnz.pre

pid process

2660 svchost.exe
2660 svchost.exe
2844 ebxkklyrnz.pre

pid	process
2660	svchost.exe

pid	process
2844	ebxkklyrnz.pre
2488	ebxkklyrnz.pre

pid	process
2660	svchost.exe
2660	svchost.exe
2844	ebxkklyrnz.pre

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral11/memory/3060-2-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/3060-4-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/3060-8-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/3060-10-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/3060-12-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/3060-14-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/3060-17-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral11/memory/2488-45-0x0000000000400000-0x0000000000414000-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-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\evxljmcx = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Unxns\\uzzqjmcx.exe"	svchost.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exeebxkklyrnz.pre

description	pid	process	target process
PID 364 set thread context of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 2844 set thread context of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.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 .exesvchost.exeebxkklyrnz.preebxkklyrnz.pre

description	pid	process	target process
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 364 wrote to memory of 3060	364	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
PID 3060 wrote to memory of 2660	3060	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	svchost.exe
PID 3060 wrote to memory of 2660	3060	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	svchost.exe
PID 3060 wrote to memory of 2660	3060	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	svchost.exe
PID 3060 wrote to memory of 2660	3060	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	svchost.exe
PID 3060 wrote to memory of 2660	3060	Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe	svchost.exe
PID 2660 wrote to memory of 2844	2660	svchost.exe	ebxkklyrnz.pre
PID 2660 wrote to memory of 2844	2660	svchost.exe	ebxkklyrnz.pre
PID 2660 wrote to memory of 2844	2660	svchost.exe	ebxkklyrnz.pre
PID 2660 wrote to memory of 2844	2660	svchost.exe	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2844 wrote to memory of 2488	2844	ebxkklyrnz.pre	ebxkklyrnz.pre
PID 2488 wrote to memory of 2516	2488	ebxkklyrnz.pre	svchost.exe
PID 2488 wrote to memory of 2516	2488	ebxkklyrnz.pre	svchost.exe
PID 2488 wrote to memory of 2516	2488	ebxkklyrnz.pre	svchost.exe
PID 2488 wrote to memory of 2516	2488	ebxkklyrnz.pre	svchost.exe
PID 2488 wrote to memory of 2516	2488	ebxkklyrnz.pre	svchost.exe

C:\Users\Admin\AppData\Local\Temp\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
"C:\Users\Admin\AppData\Local\Temp\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:364

C:\Users\Admin\AppData\Local\Temp\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe
"C:\Users\Admin\AppData\Local\Temp\Matsnu-MBRwipingRansomware_1B2D2A4B97C7C2727D571BBF9376F54F_Inkasso Rechnung vom 27.05.2013 .exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3060

C:\Windows\SysWOW64\svchost.exe
svchost.exe
3⤵
- Deletes itself
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2660

C:\Users\Admin\AppData\Local\Temp\ebxkklyrnz.pre
C:\Users\Admin\AppData\Local\Temp\ebxkklyrnz.pre
4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2844

C:\Users\Admin\AppData\Local\Temp\ebxkklyrnz.pre
C:\Users\Admin\AppData\Local\Temp\ebxkklyrnz.pre
5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2488

C:\Windows\SysWOW64\svchost.exe
svchost.exe
6⤵
- Adds Run key to start application
PID:2516

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\ebxkklyrnz.pre
Filesize
102KB

MD5
1b2d2a4b97c7c2727d571bbf9376f54f

SHA1
1fc29938ec5c209ba900247d2919069b320d33b0

SHA256
7634433f8fcf4d13fb46d680802e48eeb160e0f51e228cae058436845976381e

SHA512
506fc96423e5e2e38078806591e09a6eb3cf924eb748af528f7315aa0b929890823798a3ef2a5809c14023c3ff8a3db36277bc90c7b099218422aafa4e0c2ee0

Download Submit
memory/2488-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2516-57-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2516-51-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2516-49-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2516-47-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2660-15-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2660-16-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/2660-20-0x000000007EFA0000-0x000000007EFAE000-memory.dmp

Filesize
56KB

Download
memory/3060-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3060-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download