e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea

Analysis

max time kernel
150s
max time network
50s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
03-12-2022 18:04

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General

Target

e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe
Size

36KB
MD5

a9d3ab40148aa74e1013e01de78a688d
SHA1

7a20322cd61c2901dea98cf5340a42d1af4b6394
SHA256

e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea
SHA512

a68e7e27f3f31f83cfa9e2f75a101e57bfaec5406828b0a4ed69d0b114fea639432e3cb041f8ac80e3d6f7e38e76479b53f1273d1dcf8307127effeb311a0f10
SSDEEP

384:Db4pRL/W7hiQMB1BYzhyqaORdnZbPgv1:f4pRbW7EQMahyq3Pgv

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1160	winlogon.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Windows\\winlogon.exe"	winlogon.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Windows\\winlogon.exe"	winlogon.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\winlogon.exe	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe
File created	C:\Windows\winlogon.exe	winlogon.exe
File created	C:\Windows\winlogon.exe	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe
1160	winlogon.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1492	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe
1492	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe
1160	winlogon.exe
1160	winlogon.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 1160	1492	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe	27
PID 1492 wrote to memory of 1160	1492	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe	27
PID 1492 wrote to memory of 1160	1492	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe	27
PID 1492 wrote to memory of 1160	1492	e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe	27

C:\Users\Admin\AppData\Local\Temp\e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe
"C:\Users\Admin\AppData\Local\Temp\e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Windows\winlogon.exe
  "C:\Windows\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1160

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\winlogon.exe

Filesize
36KB

MD5
a9d3ab40148aa74e1013e01de78a688d

SHA1
7a20322cd61c2901dea98cf5340a42d1af4b6394

SHA256
e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea

SHA512
a68e7e27f3f31f83cfa9e2f75a101e57bfaec5406828b0a4ed69d0b114fea639432e3cb041f8ac80e3d6f7e38e76479b53f1273d1dcf8307127effeb311a0f10

Download Submit
C:\Windows\winlogon.exe

Filesize
36KB

MD5
a9d3ab40148aa74e1013e01de78a688d

SHA1
7a20322cd61c2901dea98cf5340a42d1af4b6394

SHA256
e6877ebc1d433bd7573e8e38f23054c98ea7f7c5a2deed9d968d0d5140c9eeea

SHA512
a68e7e27f3f31f83cfa9e2f75a101e57bfaec5406828b0a4ed69d0b114fea639432e3cb041f8ac80e3d6f7e38e76479b53f1273d1dcf8307127effeb311a0f10

Download Submit
memory/1160-58-0x0000000000000000-mapping.dmp

Download
memory/1492-57-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download