17b4d01d32c64a62e36496829da323fe308437048ca87143de7365fabd4194fd

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/11/2024, 03:36

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General

Target
EntrateSetup.exe
Size 261KB
Sample241122-d6bprstne1
SHA256 103bc884dce60ec680dd00bcd2d45721319b526b2f6ae7ebe75c73a5c977dafe
MD5 cd6258b33207e85f20fec5f39d9ba09f
SHA1 fc132ed8922a767061abfd372dfb6f23bd8c0b62
SHA512 2d0f5c0ee81b050fa99dc40fd5ea1864ae68f4d08a7610ea08f8c99e589d90d917a009ff25286d4351b133cf466a408e442c99a8b8cca99d81a81af8e4c6ab49
SSDEEP 6144:oxagl7jMOfUsQgatPpi9SQG7q94Al6HnIpOLoG7SYQ5SFZ:oxagRjM+JQ1Pp2y1Al6HesZ7Sl8Z
MD5 SHA1 SHA512 SSDEEP

Score

9^/10

defense_evasion discovery evasion execution impact persistence ransomware trojan

Malware Config

Signatures

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sljjipib = "\"C:\\Windows\\ocanybyl.exe\""	explorer.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	EntrateSetup.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1620 set thread context of 2360	1620	EntrateSetup.exe	30

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ocanybyl.exe	explorer.exe
File created	C:\Windows\ocanybyl.exe	explorer.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EntrateSetup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vssadmin.exe

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
2692	vssadmin.exe

Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Internet Explorer\PhishingFilter	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	explorer.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1620	EntrateSetup.exe
1620	EntrateSetup.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2868	vssvc.exe
Token: SeRestorePrivilege	2868	vssvc.exe
Token: SeAuditPrivilege	2868	vssvc.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 2360	1620	EntrateSetup.exe	30
PID 1620 wrote to memory of 2360	1620	EntrateSetup.exe	30
PID 1620 wrote to memory of 2360	1620	EntrateSetup.exe	30
PID 1620 wrote to memory of 2360	1620	EntrateSetup.exe	30
PID 1620 wrote to memory of 2360	1620	EntrateSetup.exe	30
PID 2360 wrote to memory of 2692	2360	explorer.exe	31
PID 2360 wrote to memory of 2692	2360	explorer.exe	31
PID 2360 wrote to memory of 2692	2360	explorer.exe	31
PID 2360 wrote to memory of 2692	2360	explorer.exe	31

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\EntrateSetup.exe
"C:\Users\Admin\AppData\Local\Temp\EntrateSetup.exe"
1⤵
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\system32\explorer.exe"
  2⤵
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer Phishing Filter
  - Suspicious use of WriteProcessMemory
  PID:2360
- - C:\Windows\SysWOW64\vssadmin.exe
    vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - System Location Discovery: System Language Discovery
    - Interacts with shadow copies
    PID:2692

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

T1047

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

01000000

Path C:\ProgramData\egynegorelydakuf\01000000
Size 261KB
SHA256 99a0358cbbd42544801443e0d729cc1ac6d983da93d248c99170b57c66fd31bc
MD5 344d179eff7427801b599847c63d232a
SHA1 d363462418f38d8f75361469429a4143b2f803f4
SHA512 e2e5e6784fe9ff7fbebc118354b1989552b41a650413a2723a402d2f1badabebb72399ff9bfc405a3cedfd03dddf6a4e7144b319eca05dff726cc52369dacc03
SSDEEP 6144:dhewQ+kWaZuKWFz+T8Z2mOjlcUI85vbpSde+2PFkzba9kIahRyV3y54:dkwRkWTKWFz+T80pjl3tDogFkz+9k9PC
MD5 SHA1 SHA512 SSDEEP

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memory/1620-12-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-10-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-1-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-0-0x0000000002360000-0x00000000026B0000-memory.dmp

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memory/1620-5-0x0000000000400000-0x0000000000445000-memory.dmp

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memory/1620-8-0x0000000002360000-0x00000000026B0000-memory.dmp

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memory/1620-13-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-3-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-2-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-9-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-11-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1620-20-0x0000000000400000-0x0000000000445000-memory.dmp

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memory/1620-4-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/2360-15-0x00000000000F0000-0x000000000012C000-memory.dmp

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memory/2360-16-0x00000000000F0000-0x000000000012C000-memory.dmp

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memory/2360-27-0x00000000000F0000-0x000000000012C000-memory.dmp

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memory/2360-24-0x00000000000F0000-0x000000000012C000-memory.dmp

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