17b4d01d32c64a62e36496829da323fe308437048ca87143de7365fabd4194fd

Analysis

max time kernel
550s
max time network
362s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 03:25

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General

Target

F45F47EDCED7FAC5A99C45AB4B8C2D54.exe
Size

86KB
MD5

f45f47edced7fac5a99c45ab4b8c2d54
SHA1

9060189dd95635c5f75d7f91c9bd345200e83028
SHA256

0529cdbc893fee664d3ac540b1e41e184797e0770808254058fc21de0a10b6c8
SHA512

ecf1ae299d0525f86b8c398d06b429164a10d6552caf08710567680ba670bc0c918bfff1807214b33a177202cbe8eeeeffa1396b91e697aed4da91fe81f523d3
SSDEEP

768:4H5GP9db20gWEF5mx1pOtIWoZzP5N1jydBWGwRYuKlYsVSsVSSVSENVSjYR:Uo760g95mRhZFrWBWvrs1/LNIYR

Score

10^/10

discovery evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

ctfmon.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\ziylmpcea.exe"	ctfmon.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

F45F47EDCED7FAC5A99C45AB4B8C2D54.exeywicmnfzby.$00.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	ywicmnfzby.$00.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

ctfmon.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	ctfmon.exe

Disables Task Manager via registry modification
evasion
Deletes itself 1 IoCs

Processes:

ctfmon.exe

pid process

2332 ctfmon.exe
Executes dropped EXE 1 IoCs

Processes:

ywicmnfzby.$00.exe

pid process

2376 ywicmnfzby.$00.exe
Loads dropped DLL 2 IoCs

Processes:

ctfmon.exe

pid process

2332 ctfmon.exe
2332 ctfmon.exe

pid	process
2332	ctfmon.exe

pid	process
2376	ywicmnfzby.$00.exe

pid	process
2332	ctfmon.exe
2332	ctfmon.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral7/memory/1628-2-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral7/memory/1628-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral7/memory/1628-6-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral7/memory/2376-19-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral7/memory/2376-23-0x0000000000400000-0x0000000000416000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

F45F47EDCED7FAC5A99C45AB4B8C2D54.exectfmon.exeywicmnfzby.$00.exectfmon.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ctfmon.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ywicmnfzby.$00.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ctfmon.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 2676 vssvc.exe
Token: SeRestorePrivilege 2676 vssvc.exe
Token: SeAuditPrivilege 2676 vssvc.exe
Suspicious use of UnmapMainImage 2 IoCs

Processes:

F45F47EDCED7FAC5A99C45AB4B8C2D54.exeywicmnfzby.$00.exe

pid process

1628 F45F47EDCED7FAC5A99C45AB4B8C2D54.exe
2376 ywicmnfzby.$00.exe

description	pid	process
Token: SeBackupPrivilege	2676	vssvc.exe
Token: SeRestorePrivilege	2676	vssvc.exe
Token: SeAuditPrivilege	2676	vssvc.exe

pid	process
1628	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe
2376	ywicmnfzby.$00.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

F45F47EDCED7FAC5A99C45AB4B8C2D54.exectfmon.exeywicmnfzby.$00.exe

description	pid	process	target process
PID 1628 wrote to memory of 2332	1628	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe	ctfmon.exe
PID 1628 wrote to memory of 2332	1628	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe	ctfmon.exe
PID 1628 wrote to memory of 2332	1628	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe	ctfmon.exe
PID 1628 wrote to memory of 2332	1628	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe	ctfmon.exe
PID 1628 wrote to memory of 2332	1628	F45F47EDCED7FAC5A99C45AB4B8C2D54.exe	ctfmon.exe
PID 2332 wrote to memory of 2376	2332	ctfmon.exe	ywicmnfzby.$00.exe
PID 2332 wrote to memory of 2376	2332	ctfmon.exe	ywicmnfzby.$00.exe
PID 2332 wrote to memory of 2376	2332	ctfmon.exe	ywicmnfzby.$00.exe
PID 2332 wrote to memory of 2376	2332	ctfmon.exe	ywicmnfzby.$00.exe
PID 2376 wrote to memory of 1900	2376	ywicmnfzby.$00.exe	ctfmon.exe
PID 2376 wrote to memory of 1900	2376	ywicmnfzby.$00.exe	ctfmon.exe
PID 2376 wrote to memory of 1900	2376	ywicmnfzby.$00.exe	ctfmon.exe
PID 2376 wrote to memory of 1900	2376	ywicmnfzby.$00.exe	ctfmon.exe
PID 2376 wrote to memory of 1900	2376	ywicmnfzby.$00.exe	ctfmon.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\F45F47EDCED7FAC5A99C45AB4B8C2D54.exe
"C:\Users\Admin\AppData\Local\Temp\F45F47EDCED7FAC5A99C45AB4B8C2D54.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\ctfmon.exe
  ctfmon.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2332
- - C:\Users\Admin\AppData\Local\Temp\ywicmnfzby.$00.exe
    C:\Users\Admin\AppData\Local\Temp\ywicmnfzby.$00.exe
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of UnmapMainImage
    - Suspicious use of WriteProcessMemory
    PID:2376
  - - C:\Windows\SysWOW64\ctfmon.exe
      ctfmon.exe
      4⤵
      Modifies WinLogon for persistence
      Disables RegEdit via registry modification
      System Location Discovery: System Language Discovery
      PID:1900

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2676

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

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\ywicmnfzby.$00.exe

Filesize
86KB

MD5
f45f47edced7fac5a99c45ab4b8c2d54

SHA1
9060189dd95635c5f75d7f91c9bd345200e83028

SHA256
0529cdbc893fee664d3ac540b1e41e184797e0770808254058fc21de0a10b6c8

SHA512
ecf1ae299d0525f86b8c398d06b429164a10d6552caf08710567680ba670bc0c918bfff1807214b33a177202cbe8eeeeffa1396b91e697aed4da91fe81f523d3

Download Submit
memory/1628-1-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/1628-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1628-6-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1628-2-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1900-22-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/1900-30-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/1900-26-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/1900-25-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/2332-17-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/2332-7-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/2332-3-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/2332-4-0x000000007EFA0000-0x000000007EFAF000-memory.dmp

Filesize
60KB

Download
memory/2376-18-0x0000000000260000-0x0000000000276000-memory.dmp

Filesize
88KB

Download
memory/2376-19-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2376-23-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2376-24-0x0000000000260000-0x0000000000276000-memory.dmp

Filesize
88KB

Download