fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b

Analysis

max time kernel
149s
max time network
118s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 06:35

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General

Target

fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
Size

69KB
MD5

b3568f1a119d93595b3e3948895460d3
SHA1

366551c31ff966aa3556764823190610b12360ee
SHA256

fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b
SHA512

bca4f0377e473161bad7994595894118bda88ac67f1e2fb1da7a534c8601abc20a6d90c07cade309efeef192959c965197d8c641a724a43f89e6d58cbb043eaf
SSDEEP

1536:1teqKDlXvCDB04f5Gn/L8FlADNt3d1Hw8L:Olg35GTslA5t3/w8L

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

Windows security bypass 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "25600"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "25600"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "25600"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "25600"	onkucad.exe

Modifies Installed Components in the registry 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{41565A43-565a-4d5a-4156-5A43565A4d5a}	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{41565A43-565a-4d5a-4156-5A43565A4d5a}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{41565A43-565a-4d5a-4156-5A43565A4d5a}\IsInstalled = "1"	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{41565A43-565a-4d5a-4156-5A43565A4d5a}\StubPath = "C:\\Windows\\system32\\ifheated.exe"	onkucad.exe

Sets file execution options in registry 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\axkeasem.exe"	onkucad.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 = "a"	onkucad.exe

Executes dropped EXE 2 IoCs

pid	Process
1500	onkucad.exe
3828	onkucad.exe

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "25600"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "25600"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "25600"	onkucad.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "25600"	onkucad.exe

Modifies WinLogon 2 TTPs 5 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\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\DLLName = "C:\\Windows\\system32\\epseatef.dll"	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup"	onkucad.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}	onkucad.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a"	onkucad.exe

Drops file in System32 directory 9 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\ifheated.exe	onkucad.exe
File created	C:\Windows\SysWOW64\ifheated.exe	onkucad.exe
File opened for modification	C:\Windows\SysWOW64\epseatef.dll	onkucad.exe
File created	C:\Windows\SysWOW64\epseatef.dll	onkucad.exe
File opened for modification	C:\Windows\SysWOW64\onkucad.exe	onkucad.exe
File opened for modification	C:\Windows\SysWOW64\onkucad.exe	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
File created	C:\Windows\SysWOW64\axkeasem.exe	onkucad.exe
File created	C:\Windows\SysWOW64\onkucad.exe	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
File opened for modification	C:\Windows\SysWOW64\axkeasem.exe	onkucad.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
3828	onkucad.exe
3828	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe
1500	onkucad.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
Token: SeDebugPrivilege	1500	onkucad.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 1500	2988	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	86
PID 2988 wrote to memory of 1500	2988	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	86
PID 2988 wrote to memory of 1500	2988	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	86
PID 1500 wrote to memory of 616	1500	onkucad.exe	5
PID 1500 wrote to memory of 3828	1500	onkucad.exe	87
PID 1500 wrote to memory of 3828	1500	onkucad.exe	87
PID 1500 wrote to memory of 3828	1500	onkucad.exe	87
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56
PID 1500 wrote to memory of 3416	1500	onkucad.exe	56

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3416
- C:\Users\Admin\AppData\Local\Temp\fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
  "C:\Users\Admin\AppData\Local\Temp\fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2988
- - C:\Windows\SysWOW64\onkucad.exe
    "C:\Windows\system32\onkucad.exe"
    3⤵
    - Windows security bypass
    - Modifies Installed Components in the registry
    - Sets file execution options in registry
    - Executes dropped EXE
    - Windows security modification
    - Modifies WinLogon
    - Drops file in System32 directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1500
  - - C:\Windows\SysWOW64\onkucad.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\axkeasem.exe

Filesize
73KB

MD5
0a40eb113d02c2b8f9989cf845e4b124

SHA1
f2ff655b60d06addd6b1ce148377a190ed827607

SHA256
d83ac9f5080822e6e3c1d47604a3e3c9a5f110fd445535ae595dd6bd65966016

SHA512
5d094642f9075c93be8a7644a0d43358b442591090ca9b4de3d1463837d408f11152aa1f816c1fde91141adbc8847f9d932460a8948ae5df3797d99b1440b70c

Download Submit
C:\Windows\SysWOW64\epseatef.dll

Filesize
5KB

MD5
f37b21c00fd81bd93c89ce741a88f183

SHA1
b2796500597c68e2f5638e1101b46eaf32676c1c

SHA256
76cf016fd77cb5a06c6ed4674ddc2345e8390c010cf344491a6e742baf2c0fb0

SHA512
252fe66dea9a4b9aebc5fd2f24434719cb25159ba51549d9de407f44b6a2f7bce6e071be02c4f2ad6aef588c77f12c00ed415eb54f96dec1b077326e101ce0f4

Download Submit
C:\Windows\SysWOW64\ifheated.exe

Filesize
72KB

MD5
3a5ff62239e712704dd0928ac78d5dd1

SHA1
ab1711f443f8f00f94a031a42a7cb18499a67646

SHA256
7e743305dc163e25387597dfc803e52bc8aceb11c8e24beffe653323f2582e09

SHA512
4264f8e8e38bfad87137598fa896c5a09158c5750142867c42165bec54d3ddf4d01d55dbd56175ea7573640b270635659fc0d4563249b082f48c938c9bb13cf0

Download Submit
C:\Windows\SysWOW64\onkucad.exe

Filesize
69KB

MD5
b3568f1a119d93595b3e3948895460d3

SHA1
366551c31ff966aa3556764823190610b12360ee

SHA256
fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b

SHA512
bca4f0377e473161bad7994595894118bda88ac67f1e2fb1da7a534c8601abc20a6d90c07cade309efeef192959c965197d8c641a724a43f89e6d58cbb043eaf

Download Submit
memory/2988-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download