cffebe5277e2801afb82be68cf0058530195fd4635bed8a0b130684bdaeacac0

Analysis

max time kernel
88s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2023 08:57

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General

Target

136b00d5e44a6e8eaa074153407f589f.exe
Size

438KB
MD5

136b00d5e44a6e8eaa074153407f589f
SHA1

730a71bce59c726dc3a8353c2702f58e7738ca7c
SHA256

cffebe5277e2801afb82be68cf0058530195fd4635bed8a0b130684bdaeacac0
SHA512

081a0109ae77d9be68112bd9bc1a2a9dfaf2fa883465eec10adce97ac84ccabaf7b284fe16ac63692556300add4f980e975daf056a326cd4b2c2e1ec6f54f1f3
SSDEEP

6144:AwIL6EKSN9L8gdhCrbMF2idZecnl20lHRxp3gGncduD7yB9VCO6Sco4q8+dE6Cqw:pIL6JSjHybsF3Z4mxxZDqVTVOCw

Score

8^/10

persistence

Malware Config

Signatures

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Ruser\Parameters\ServiceDll = "C:\\Windows\\system32\\RUser.Dll"	136b00d5e44a6e8eaa074153407f589f.exe

Loads dropped DLL 2 IoCs

pid	Process
4596	svchost.exe
4596	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\RUser.Dll	136b00d5e44a6e8eaa074153407f589f.exe
File opened for modification	C:\Windows\SysWOW64\RUser.Dll	136b00d5e44a6e8eaa074153407f589f.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4716	4596	WerFault.exe	96

Kills process with taskkill 1 IoCs

evasion

pid	Process
4392	taskkill.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3064	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4280	136b00d5e44a6e8eaa074153407f589f.exe
4280	136b00d5e44a6e8eaa074153407f589f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	136b00d5e44a6e8eaa074153407f589f.exe
Token: SeDebugPrivilege	4392	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 4392	4280	136b00d5e44a6e8eaa074153407f589f.exe	94
PID 4280 wrote to memory of 4392	4280	136b00d5e44a6e8eaa074153407f589f.exe	94
PID 4280 wrote to memory of 4392	4280	136b00d5e44a6e8eaa074153407f589f.exe	94
PID 4280 wrote to memory of 1912	4280	136b00d5e44a6e8eaa074153407f589f.exe	97
PID 4280 wrote to memory of 1912	4280	136b00d5e44a6e8eaa074153407f589f.exe	97
PID 4280 wrote to memory of 1912	4280	136b00d5e44a6e8eaa074153407f589f.exe	97
PID 1912 wrote to memory of 3064	1912	cmd.exe	99
PID 1912 wrote to memory of 3064	1912	cmd.exe	99
PID 1912 wrote to memory of 3064	1912	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\136b00d5e44a6e8eaa074153407f589f.exe
"C:\Users\Admin\AppData\Local\Temp\136b00d5e44a6e8eaa074153407f589f.exe"
1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /im 360tray.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:4392
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping localhost -n 1 && del "C:\Users\Admin\AppData\Local\Temp\136b00d5e44a6e8eaa074153407f589f.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\Windows\SysWOW64\PING.EXE
    ping localhost -n 1
    3⤵
    - Runs ping.exe
    PID:3064

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k Ruser
1⤵
- Loads dropped DLL
PID:4596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4596 -s 824
  2⤵
  - Program crash
  PID:4716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4596 -ip 4596
1⤵
PID:2736

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

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\??\c:\windows\SysWOW64\ruser.dll

Filesize
58KB

MD5
f3f2b4be95b659cc7562e44c81da3942

SHA1
aab2dd58f5fe8c77418bc75d01dee0ed816a6e72

SHA256
8f1f9908e3ba935427c6da2d379e5df932c6105d0bc3ee6c19ea9bb0cf65dc98

SHA512
bc8d6d733c7d3d11796dae8fafff7bdfd1b5ad9d062b56e8ebd9ef6c009149ce6dfff3ced1f8eb15d528fa570887764e325369a29b07272e9542e8ccd75bd525

Download Submit
memory/4280-0-0x0000000000400000-0x0000000000487000-memory.dmp

Filesize
540KB

Download
memory/4280-1-0x0000000002230000-0x0000000002284000-memory.dmp

Filesize
336KB

Download
memory/4280-19-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-18-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-32-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-33-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-47-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-55-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-56-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-63-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-62-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-61-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-60-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-59-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-58-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-57-0x0000000002450000-0x0000000002459000-memory.dmp

Filesize
36KB

Download
memory/4280-54-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-53-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-52-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-51-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-50-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-49-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-48-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-46-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-45-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-44-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-43-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-42-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-41-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-40-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-39-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-38-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-36-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-37-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-35-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-34-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-31-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-30-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-29-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-28-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-27-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-26-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-25-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-24-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-23-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-22-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-21-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-20-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-17-0x0000000003440000-0x0000000003441000-memory.dmp

Filesize
4KB

Download
memory/4280-16-0x0000000003450000-0x0000000003456000-memory.dmp

Filesize
24KB

Download
memory/4280-15-0x0000000003450000-0x0000000003456000-memory.dmp

Filesize
24KB

Download
memory/4280-14-0x0000000003450000-0x0000000003456000-memory.dmp

Filesize
24KB

Download
memory/4280-13-0x0000000003450000-0x0000000003456000-memory.dmp

Filesize
24KB

Download
memory/4280-12-0x0000000003450000-0x0000000003456000-memory.dmp

Filesize
24KB

Download
memory/4280-11-0x0000000003450000-0x0000000003456000-memory.dmp

Filesize
24KB

Download
memory/4280-10-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download
memory/4280-9-0x00000000024F0000-0x00000000024F1000-memory.dmp

Filesize
4KB

Download
memory/4280-8-0x00000000024C0000-0x00000000024C1000-memory.dmp

Filesize
4KB

Download
memory/4280-7-0x00000000024D0000-0x00000000024D1000-memory.dmp

Filesize
4KB

Download
memory/4280-6-0x0000000002460000-0x0000000002461000-memory.dmp

Filesize
4KB

Download
memory/4280-5-0x0000000002470000-0x0000000002471000-memory.dmp

Filesize
4KB

Download
memory/4280-4-0x00000000024E0000-0x00000000024E1000-memory.dmp

Filesize
4KB

Download
memory/4280-3-0x0000000002490000-0x0000000002491000-memory.dmp

Filesize
4KB

Download
memory/4280-2-0x00000000024B0000-0x00000000024B1000-memory.dmp

Filesize
4KB

Download
memory/4280-74-0x0000000000400000-0x0000000000487000-memory.dmp

Filesize
540KB

Download
memory/4596-80-0x0000000000ED0000-0x00000000011FE000-memory.dmp

Filesize
3.2MB

Download
memory/4596-82-0x0000000000ED0000-0x00000000011FE000-memory.dmp

Filesize
3.2MB

Download