45cba05a15bd89f978a8ab5eb04c8866a6d3a331eeae95f2b2f940dc37e6a629

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 07:59

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General

Target

74278ef34cf92d18e19ebec97f17bcd1.exe
Size

10KB
MD5

74278ef34cf92d18e19ebec97f17bcd1
SHA1

5613cad4d4e5d61902fa26ba5ddd8150c219b015
SHA256

45cba05a15bd89f978a8ab5eb04c8866a6d3a331eeae95f2b2f940dc37e6a629
SHA512

2c2591f7ea2bb6f93a8af16712149672b8b13fde419b24340d83cd4a2065c9da1ffd67da22cef299ce087d1e62e0014c95f896fff2d8eec7cf25b25116d37f66
SSDEEP

192:b3+AEaXB7FbvmK8cp1Li5kRHhEmopggjr6bsg:aAfxBDmdY1qIfoVg

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Executes dropped EXE 1 IoCs

pid	Process
2504	rmbsonyk.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3584-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0007000000023229-4.dat	upx
behavioral2/memory/3584-6-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/memory/2504-7-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rmbsonyk.exe	74278ef34cf92d18e19ebec97f17bcd1.exe
File created	C:\Windows\SysWOW64\rmbsony.dll	74278ef34cf92d18e19ebec97f17bcd1.exe
File created	C:\Windows\SysWOW64\rmbsonyk.exe	74278ef34cf92d18e19ebec97f17bcd1.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3584 wrote to memory of 2504	3584	74278ef34cf92d18e19ebec97f17bcd1.exe	87
PID 3584 wrote to memory of 2504	3584	74278ef34cf92d18e19ebec97f17bcd1.exe	87
PID 3584 wrote to memory of 2504	3584	74278ef34cf92d18e19ebec97f17bcd1.exe	87
PID 3584 wrote to memory of 5776	3584	74278ef34cf92d18e19ebec97f17bcd1.exe	98
PID 3584 wrote to memory of 5776	3584	74278ef34cf92d18e19ebec97f17bcd1.exe	98
PID 3584 wrote to memory of 5776	3584	74278ef34cf92d18e19ebec97f17bcd1.exe	98

C:\Users\Admin\AppData\Local\Temp\74278ef34cf92d18e19ebec97f17bcd1.exe
"C:\Users\Admin\AppData\Local\Temp\74278ef34cf92d18e19ebec97f17bcd1.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3584
- C:\Windows\SysWOW64\rmbsonyk.exe
  C:\Windows\system32\rmbsonyk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2504
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\74278ef34cf92d18e19ebec97f17bcd1.exe.bat
  2⤵
  PID:5776

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

C:\Users\Admin\AppData\Local\Temp\74278ef34cf92d18e19ebec97f17bcd1.exe.bat

Filesize
182B

MD5
b2e85f267db3f457dea16cdebca4657d

SHA1
d3ea2834b3aa81f1fbbe07dc2b5aaa592b734299

SHA256
d0252b7c5007f8a20cfd3a95bffd49055b7b38cc97e5c91a0c05725bd9607330

SHA512
a973fa4254d868cfa0d6ace6e4d9bb85b48876ad677dc694e0088d28df58c593d1fa440d515377a287268f2ccfc4fcda5c80dfeadfd632a3d8dfcbda7b36a84f

Download Submit
C:\Windows\SysWOW64\rmbsonyk.exe

Filesize
10KB

MD5
74278ef34cf92d18e19ebec97f17bcd1

SHA1
5613cad4d4e5d61902fa26ba5ddd8150c219b015

SHA256
45cba05a15bd89f978a8ab5eb04c8866a6d3a331eeae95f2b2f940dc37e6a629

SHA512
2c2591f7ea2bb6f93a8af16712149672b8b13fde419b24340d83cd4a2065c9da1ffd67da22cef299ce087d1e62e0014c95f896fff2d8eec7cf25b25116d37f66

Download Submit
memory/2504-7-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3584-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3584-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download