9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50

Analysis

max time kernel
67s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
15/02/2023, 18:43

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General

Target

9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe
Size

124KB
MD5

57f8c861415c8340a34290b2c3b169d2
SHA1

2c71ba918791a1d23276d22a9e11b0685284a22d
SHA256

9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50
SHA512

a7efd1f26bb25bd7c25a4a90f7387871135aaaa4231c5d0ad7a0089a0bc3a87f504e62293b44095d148f63ef4165fa224c211cdff4cbc6e63c59f43cbab48cd9
SSDEEP

3072:fhCInyerIJDDZxeeNp3PC2wnwVLkJVllWbDW:fhCInyecdD7eyCznLTllWb6

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1168	rwnlws.exe
4132	rwnlws.exe

Creates a Windows Service
persistence

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rwnlws.exe	9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe
File created	C:\Windows\rwnlws.exe	9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rwnlws.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rwnlws.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	rwnlws.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie	rwnlws.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7"	rwnlws.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	rwnlws.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	rwnlws.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe
4132	rwnlws.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4636	9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4636	9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe
1168	rwnlws.exe
4132	rwnlws.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1168 wrote to memory of 4132	1168	rwnlws.exe	81
PID 1168 wrote to memory of 4132	1168	rwnlws.exe	81
PID 1168 wrote to memory of 4132	1168	rwnlws.exe	81

C:\Users\Admin\AppData\Local\Temp\9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe
"C:\Users\Admin\AppData\Local\Temp\9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: RenamesItself
- Suspicious use of SetWindowsHookEx
PID:4636

C:\Windows\rwnlws.exe
C:\Windows\rwnlws.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1168
- C:\Windows\rwnlws.exe
  C:\Windows\rwnlws.exe Win7
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:4132

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\rwnlws.exe

Filesize
124KB

MD5
57f8c861415c8340a34290b2c3b169d2

SHA1
2c71ba918791a1d23276d22a9e11b0685284a22d

SHA256
9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50

SHA512
a7efd1f26bb25bd7c25a4a90f7387871135aaaa4231c5d0ad7a0089a0bc3a87f504e62293b44095d148f63ef4165fa224c211cdff4cbc6e63c59f43cbab48cd9

Download Submit
C:\Windows\rwnlws.exe

Filesize
124KB

MD5
57f8c861415c8340a34290b2c3b169d2

SHA1
2c71ba918791a1d23276d22a9e11b0685284a22d

SHA256
9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50

SHA512
a7efd1f26bb25bd7c25a4a90f7387871135aaaa4231c5d0ad7a0089a0bc3a87f504e62293b44095d148f63ef4165fa224c211cdff4cbc6e63c59f43cbab48cd9

Download Submit
C:\Windows\rwnlws.exe

Filesize
124KB

MD5
57f8c861415c8340a34290b2c3b169d2

SHA1
2c71ba918791a1d23276d22a9e11b0685284a22d

SHA256
9fa70ac11eab9f3e1578c8239e561088e11efae2543cb327738fad35fdfb6f50

SHA512
a7efd1f26bb25bd7c25a4a90f7387871135aaaa4231c5d0ad7a0089a0bc3a87f504e62293b44095d148f63ef4165fa224c211cdff4cbc6e63c59f43cbab48cd9

Download Submit
memory/1168-137-0x0000000010000000-0x000000001000F000-memory.dmp

Filesize
60KB

Download
memory/4636-132-0x0000000010000000-0x000000001000F000-memory.dmp

Filesize
60KB

Download