74550647b3a5e08fb3ffaeb4444beeea3e86312919a7e7350008062aeeac37e3

Analysis

max time kernel
120s
max time network
108s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21-08-2024 15:30

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General

Target

dfcb72df9d7365a74214073b7006d9a0N.exe
Size

209KB
MD5

dfcb72df9d7365a74214073b7006d9a0
SHA1

6d1b58acc1fdf1961c6ec807c669e67684d93b4f
SHA256

74550647b3a5e08fb3ffaeb4444beeea3e86312919a7e7350008062aeeac37e3
SHA512

35b143b4bd084634c40f517b92f0843a725553064be5cf167d52f5ad099407d56540885811b163bf861908df587973179f6d05933141efd612b5704ed43607f7
SSDEEP

3072:0Qcjk9tVRNIcjb4Ryfjijjx14hdeCXHKPJFo9zpE7Di0X0JuLL+o7BlpF9e:0Qh9tVRm2kh34hdeCkcG7DEALLlnN

Score

10^/10

discovery persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\apppatch\\svchost.exe,"	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3964	svchost.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1520-1-0x0000000000400000-0x0000000000469000-memory.dmp	upx
behavioral2/memory/1520-13-0x0000000000400000-0x0000000000469000-memory.dmp	upx
behavioral2/memory/3964-15-0x0000000000400000-0x0000000000469000-memory.dmp	upx
behavioral2/memory/3964-17-0x0000000000400000-0x0000000000469000-memory.dmp	upx

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\9276a74b = "C:\\Windows\\apppatch\\svchost.exe"	dfcb72df9d7365a74214073b7006d9a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\9276a74b = "C:\\Windows\\apppatch\\svchost.exe"	svchost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\apppatch\svchost.exe	dfcb72df9d7365a74214073b7006d9a0N.exe
File opened for modification	C:\Windows\apppatch\svchost.exe	dfcb72df9d7365a74214073b7006d9a0N.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dfcb72df9d7365a74214073b7006d9a0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3964	svchost.exe
3964	svchost.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1520	dfcb72df9d7365a74214073b7006d9a0N.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 3964	1520	dfcb72df9d7365a74214073b7006d9a0N.exe	85
PID 1520 wrote to memory of 3964	1520	dfcb72df9d7365a74214073b7006d9a0N.exe	85
PID 1520 wrote to memory of 3964	1520	dfcb72df9d7365a74214073b7006d9a0N.exe	85

C:\Users\Admin\AppData\Local\Temp\dfcb72df9d7365a74214073b7006d9a0N.exe
"C:\Users\Admin\AppData\Local\Temp\dfcb72df9d7365a74214073b7006d9a0N.exe"
1⤵
- Modifies WinLogon
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Windows\apppatch\svchost.exe
  "C:\Windows\apppatch\svchost.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Modifies WinLogon
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\apppatch\svchost.exe

Filesize
209KB

MD5
942fc6487cd9461a5023808b6cdabde5

SHA1
0ce17e44f5c9bd6dbc69192430e73fd7eb8dc72b

SHA256
d2cec81610a727387cb64cbae3f15ebbcad952bbdda8170c1c354bf5a6d33dbe

SHA512
e72442f474acb44807cfe0766038887ae0b0f0a0118e9b45b356e211f414e987c11b9315baec46c24ffbc4ddb3f3bdd3c90cbbd306b69aeb6928b56ee2814e98

Download Submit
memory/1520-0-0x00000000021D0000-0x0000000002228000-memory.dmp

Filesize
352KB

Download
memory/1520-1-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/1520-13-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/1520-12-0x00000000021D0000-0x0000000002228000-memory.dmp

Filesize
352KB

Download
memory/3964-15-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/3964-14-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/3964-16-0x0000000002770000-0x00000000027FA000-memory.dmp

Filesize
552KB

Download
memory/3964-17-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/3964-18-0x0000000002B40000-0x0000000002BD9000-memory.dmp

Filesize
612KB

Download
memory/3964-20-0x0000000002B40000-0x0000000002BD9000-memory.dmp

Filesize
612KB

Download
memory/3964-22-0x0000000002B40000-0x0000000002BD9000-memory.dmp

Filesize
612KB

Download
memory/3964-25-0x0000000002B40000-0x0000000002BD9000-memory.dmp

Filesize
612KB

Download