ea1bbd44c46577fde3ceff3e4892c8a4c06c2bc0c2e0f9f14b9ca97e9f9ef6ea

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30-12-2023 11:35

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General

Target

17477af95b7b4ec2958102691a5677d3.exe
Size

10KB
MD5

17477af95b7b4ec2958102691a5677d3
SHA1

441ee1a2c83a027d7bc2f5b8b0a9d45edb1e27e6
SHA256

ea1bbd44c46577fde3ceff3e4892c8a4c06c2bc0c2e0f9f14b9ca97e9f9ef6ea
SHA512

da672161fdec1617d4d64e5ee15acf798244da8a5cbb4bc92ea4a8175d6407bf59d2a696afd27ded0deee16c19175c1e5e51a928f8980fcc0e1b259a5e1b84c7
SSDEEP

192:bIGRQruTIWTez+CIrav6PilUf2nrOO/yFIi3buJccg:5RQru0WKiCIrCNlUfCT/yFDu/g

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

Deletes itself 1 IoCs

pid	Process
2932	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2468	rmbsonyk.exe

Loads dropped DLL 2 IoCs

pid	Process
2848	17477af95b7b4ec2958102691a5677d3.exe
2848	17477af95b7b4ec2958102691a5677d3.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2848-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000d0000000122b8-3.dat	upx
behavioral1/memory/2848-4-0x0000000000230000-0x000000000023E000-memory.dmp	upx
behavioral1/memory/2848-11-0x0000000000230000-0x000000000023E000-memory.dmp	upx
behavioral1/memory/2468-12-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2848-13-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rmbsony.dll	17477af95b7b4ec2958102691a5677d3.exe
File created	C:\Windows\SysWOW64\rmbsonyk.exe	17477af95b7b4ec2958102691a5677d3.exe
File opened for modification	C:\Windows\SysWOW64\rmbsonyk.exe	17477af95b7b4ec2958102691a5677d3.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 2468	2848	17477af95b7b4ec2958102691a5677d3.exe	28
PID 2848 wrote to memory of 2468	2848	17477af95b7b4ec2958102691a5677d3.exe	28
PID 2848 wrote to memory of 2468	2848	17477af95b7b4ec2958102691a5677d3.exe	28
PID 2848 wrote to memory of 2468	2848	17477af95b7b4ec2958102691a5677d3.exe	28
PID 2848 wrote to memory of 2932	2848	17477af95b7b4ec2958102691a5677d3.exe	29
PID 2848 wrote to memory of 2932	2848	17477af95b7b4ec2958102691a5677d3.exe	29
PID 2848 wrote to memory of 2932	2848	17477af95b7b4ec2958102691a5677d3.exe	29
PID 2848 wrote to memory of 2932	2848	17477af95b7b4ec2958102691a5677d3.exe	29

C:\Users\Admin\AppData\Local\Temp\17477af95b7b4ec2958102691a5677d3.exe
"C:\Users\Admin\AppData\Local\Temp\17477af95b7b4ec2958102691a5677d3.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SysWOW64\rmbsonyk.exe
  C:\Windows\system32\rmbsonyk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2468
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\17477af95b7b4ec2958102691a5677d3.exe.bat
  2⤵
  - Deletes itself
  PID:2932

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

C:\Users\Admin\AppData\Local\Temp\17477af95b7b4ec2958102691a5677d3.exe.bat

Filesize
182B

MD5
1b43c0b73e5d7eead70bb8fa47254901

SHA1
ca3a897cb91f64d473da61577bc661ec15642f31

SHA256
2e7404d66a6f1950451bf5949be1f1cd3e72adb38bf1f0527575139d438bb23f

SHA512
96a91bde518fd0a9c985d0e01ee82b26e4d59d24ea77c6e9df6600ebe30ddbce6b3d19158ae3a683fe2dd4407887410bc83d9fe119e18c825a05864e398549fd

Download Submit
\Windows\SysWOW64\rmbsonyk.exe

Filesize
10KB

MD5
17477af95b7b4ec2958102691a5677d3

SHA1
441ee1a2c83a027d7bc2f5b8b0a9d45edb1e27e6

SHA256
ea1bbd44c46577fde3ceff3e4892c8a4c06c2bc0c2e0f9f14b9ca97e9f9ef6ea

SHA512
da672161fdec1617d4d64e5ee15acf798244da8a5cbb4bc92ea4a8175d6407bf59d2a696afd27ded0deee16c19175c1e5e51a928f8980fcc0e1b259a5e1b84c7

Download Submit
memory/2468-12-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2848-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2848-4-0x0000000000230000-0x000000000023E000-memory.dmp

Filesize
56KB

Download
memory/2848-11-0x0000000000230000-0x000000000023E000-memory.dmp

Filesize
56KB

Download
memory/2848-13-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download