ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2

General

Target

ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe
Size

145KB
MD5

0e61bcd8d38578b68186f146914e92e0
SHA1

3ee7770f9a8e0c6c4a962659baa3082097fafcbc
SHA256

ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2
SHA512

1ba1abe81b25c6be41a198cf7b7ba76a9705da4e2f7d318d33cd85348a37fb6596464a9e5ca3dc40686f16101d8c2b7329cb5066c86a4fc8760e27b7c1c1b66d
SSDEEP

3072:Mae+scKB6+j2KkErn71HXeUg7wlT0uawqoNLboIVcjb8lERGl:lsjSKkqTgya8J

Score

10^/10

persistence

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	winlog.exe

Executes dropped EXE 1 IoCs

pid	Process
1672	winlog.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\winlog.EXE	ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe

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

System Information Discovery
T1082

Modifies registry class 24 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\open\command	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\open\command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\explore	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\inifile\shell\open\command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\chm.file\shell\open\command	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\VBSFile\Shell\Open\Command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\ = "open"	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\explore\command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\explore\ = "?????(&X) "	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\inifile\shell\open\command	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vbsfile\shell\open\command	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\explore\command	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\inffile\shell\open\command\ = "C:\\Windows\\winlog.EXE %1"	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\open	winlog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shell\open\ = "??(&O) "	winlog.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\inffile\shell\open\command	winlog.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1672	winlog.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2028	ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe
1672	winlog.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 1672	2028	ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe	27
PID 2028 wrote to memory of 1672	2028	ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe	27
PID 2028 wrote to memory of 1672	2028	ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe	27
PID 2028 wrote to memory of 1672	2028	ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe	27

C:\Users\Admin\AppData\Local\Temp\ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe
"C:\Users\Admin\AppData\Local\Temp\ad55f2bd3b19f725fb53e4dd13c80936dfbb2d8a14a7327d29b19ceb7cc61ef2.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\winlog.exe
  "C:\Windows\winlog.exe"
  2⤵
  - Modifies system executable filetype association
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:1672

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\winlog.EXE

Filesize
68KB

MD5
e401ba63c7e3cb2942a1bb693c3e4232

SHA1
5c646e484e4860ce749dd29c5f5240679703bda5

SHA256
5d2bb760b61acbe991f7a2db850570448de01671487e89312e9f3f3ca88a1d41

SHA512
c9b25a1e182a763414a8533207115a4a9e5c0a72db61cc8f8b4a2f2f8e2abe78ed57f769f7db66b49c4b8f2b300de936a14faa9faa9b1262d1f242b2a13c8727

Download Submit
memory/1672-57-0x0000000000000000-mapping.dmp

Download
memory/2028-56-0x0000000075561000-0x0000000075563000-memory.dmp

Filesize
8KB

Download

Analysis

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