2f7c4ee4fde198e54e5f29ef1eafe326bda0f24f21bb4bf36e6416d32e75d246

General

Target

36c4f2289cbfeb319219743392141a67.exe
Size

1.0MB
MD5

36c4f2289cbfeb319219743392141a67
SHA1

4b2b2f483e3e2663c0be603817bc038cce4941ed
SHA256

2f7c4ee4fde198e54e5f29ef1eafe326bda0f24f21bb4bf36e6416d32e75d246
SHA512

3f3c9472397055e44ecf6a14b34b07a0384e759cc4b618b33e994bd076271fdc2085078396b88ed33b5d4a07d6ddf61a75e90fc02e024d68539449a13ed6f52a
SSDEEP

24576:+JeJfAKijp98zHpneTXdp9aepOBm1oc7KbvyFyK9:0eJfALGperduepOBm+c79

Score

10^/10

evasion 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 rundll.exe"	36c4f2289cbfeb319219743392141a67.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	36c4f2289cbfeb319219743392141a67.exe

Disables Task Manager via registry modification
evasion

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\Yahoo Messengger = "C:\\Windows\\system32\\regsvr.exe"	36c4f2289cbfeb319219743392141a67.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\t:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\z:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\a:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\h:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\i:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\l:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\p:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\j:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\r:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\y:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\s:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\v:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\x:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\b:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\e:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\g:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\m:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\q:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\k:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\n:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\o:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\u:	36c4f2289cbfeb319219743392141a67.exe
File opened (read-only)	\??\w:	36c4f2289cbfeb319219743392141a67.exe

Modifies WinLogon 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\system = "Winhelp.exe"	36c4f2289cbfeb319219743392141a67.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/1600-0-0x0000000000400000-0x00000000004A1000-memory.dmp	autoit_exe
behavioral1/files/0x00090000000155f7-13.dat	autoit_exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\winhelp.exe	36c4f2289cbfeb319219743392141a67.exe
File opened for modification	C:\Windows\SysWOW64\setup.ini	36c4f2289cbfeb319219743392141a67.exe
File created	C:\Windows\SysWOW64\regsvr.exe	36c4f2289cbfeb319219743392141a67.exe
File opened for modification	C:\Windows\SysWOW64\regsvr.exe	36c4f2289cbfeb319219743392141a67.exe
File created	C:\Windows\SysWOW64\winhelp.exe	36c4f2289cbfeb319219743392141a67.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\regsvr.exe	36c4f2289cbfeb319219743392141a67.exe
File opened for modification	C:\Windows\regsvr.exe	36c4f2289cbfeb319219743392141a67.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe
1600	36c4f2289cbfeb319219743392141a67.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 3028	1600	36c4f2289cbfeb319219743392141a67.exe	19
PID 1600 wrote to memory of 3028	1600	36c4f2289cbfeb319219743392141a67.exe	19
PID 1600 wrote to memory of 3028	1600	36c4f2289cbfeb319219743392141a67.exe	19
PID 1600 wrote to memory of 3028	1600	36c4f2289cbfeb319219743392141a67.exe	19
PID 3028 wrote to memory of 2384	3028	cmd.exe	18
PID 3028 wrote to memory of 2384	3028	cmd.exe	18
PID 3028 wrote to memory of 2384	3028	cmd.exe	18
PID 3028 wrote to memory of 2384	3028	cmd.exe	18
PID 1600 wrote to memory of 1464	1600	36c4f2289cbfeb319219743392141a67.exe	17
PID 1600 wrote to memory of 1464	1600	36c4f2289cbfeb319219743392141a67.exe	17
PID 1600 wrote to memory of 1464	1600	36c4f2289cbfeb319219743392141a67.exe	17
PID 1600 wrote to memory of 1464	1600	36c4f2289cbfeb319219743392141a67.exe	17
PID 1464 wrote to memory of 1680	1464	cmd.exe	15
PID 1464 wrote to memory of 1680	1464	cmd.exe	15
PID 1464 wrote to memory of 1680	1464	cmd.exe	15
PID 1464 wrote to memory of 1680	1464	cmd.exe	15

C:\Windows\SysWOW64\at.exe
AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\winhelp.exe
1⤵
PID:1680

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\winhelp.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:1464

C:\Windows\SysWOW64\at.exe
AT /delete /yes
1⤵
PID:2384

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /C AT /delete /yes
1⤵
- Suspicious use of WriteProcessMemory
PID:3028

C:\Users\Admin\AppData\Local\Temp\36c4f2289cbfeb319219743392141a67.exe
"C:\Users\Admin\AppData\Local\Temp\36c4f2289cbfeb319219743392141a67.exe"
1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Adds Run key to start application
- Enumerates connected drives
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

2

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

2

T1547.004

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\winhelp.exe

Filesize
165KB

MD5
13f842278c996a61154c7550cef3f391

SHA1
0825e819d169cbb847a6497dfe5ebc64559e49c1

SHA256
3b5419997d37f54f1b2e82d2f1560ffba61128896fa69336dfd3400ed9b3273e

SHA512
0577ce383b62d960c71d3bdb1607eb609c14f7e608f66f5234fbe4cda2d8216320e1853f054695a85e80d06e4caf0d3b4eb2fb38bf95ed053362749cb9581336

Download Submit
memory/1600-0-0x0000000000400000-0x00000000004A1000-memory.dmp

Filesize
644KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads