77ebfc4558e6ee3a545fa8e81b5abd8eb5c8bda9fc9decb914fb73062a7ef847

Analysis

max time kernel
147s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03-01-2024 20:46

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General

Target

3f09c031d055f3067046fdccba261ce3.exe
Size

135KB
MD5

3f09c031d055f3067046fdccba261ce3
SHA1

85c1a0f2666356d90ee731a5c0fdc6f76b94b876
SHA256

77ebfc4558e6ee3a545fa8e81b5abd8eb5c8bda9fc9decb914fb73062a7ef847
SHA512

3200dc2abe01ca7f097aceb433c26277e68989ed376136f1778700508116426b51fe66db4e5e8947266c5e7e3fb6ae7d2964c14309bbc98aca8df6a7edb5b524
SSDEEP

3072:zVJiH7zlDO+7Et0OXjO6mo0IKbouSazYhG6TBf48LlnrT:z/cw+IeOiB0uSazYhG6TBQ8L1T

Score

10^/10

persistence

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\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\EXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"	3f09c031d055f3067046fdccba261ce3.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\LXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX	3f09c031d055f3067046fdccba261ce3.exe
File created	C:\Windows\SysWOW64\LXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX	3f09c031d055f3067046fdccba261ce3.exe
File created	C:\Windows\SysWOW64\Deleteme.bat	3f09c031d055f3067046fdccba261ce3.exe
File created	C:\Windows\SysWOW64\EXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX	3f09c031d055f3067046fdccba261ce3.exe
File opened for modification	C:\Windows\SysWOW64\EXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX	3f09c031d055f3067046fdccba261ce3.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe
3196	3f09c031d055f3067046fdccba261ce3.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3196 wrote to memory of 3504	3196	3f09c031d055f3067046fdccba261ce3.exe	19
PID 3196 wrote to memory of 3504	3196	3f09c031d055f3067046fdccba261ce3.exe	19
PID 3196 wrote to memory of 3504	3196	3f09c031d055f3067046fdccba261ce3.exe	19

C:\Users\Admin\AppData\Local\Temp\3f09c031d055f3067046fdccba261ce3.exe
"C:\Users\Admin\AppData\Local\Temp\3f09c031d055f3067046fdccba261ce3.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3196
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\system32\Deleteme.bat
  2⤵
  PID:3504

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\Deleteme.bat

Filesize
184B

MD5
9ff786762f1f91b712099195c4b42952

SHA1
9e2b284a08a4a0e06bbff1aaab4072099dbeed39

SHA256
e52c84eb342f3f1f161c63199d738295939d62fb6747adeb44a2253e77f3fe03

SHA512
5ab6e53bd048a7a839075375a8bfb4e663b555bc6d9a993fb04fe02d9f3e648a19f4b0c29c816900fe1abb334dbcdf2b5ebea4910cbb127f87e888395b268fcb

Download Submit
memory/3196-5-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

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