fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b

Analysis

max time kernel
133s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\IsInstalled = "1"	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\StubPath = "C:\\Windows\\system32\\ifheated.exe"	onkucad.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}	onkucad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	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
2960	onkucad.exe
3052	onkucad.exe

Loads dropped DLL 3 IoCs

pid	Process
2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
2960	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
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
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

Drops file in System32 directory 9 IoCs

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
3052	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe
2960	onkucad.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
Token: SeDebugPrivilege	2960	onkucad.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2772 wrote to memory of 2960	2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	28
PID 2772 wrote to memory of 2960	2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	28
PID 2772 wrote to memory of 2960	2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	28
PID 2772 wrote to memory of 2960	2772	fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe	28
PID 2960 wrote to memory of 416	2960	onkucad.exe	5
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 3052	2960	onkucad.exe	29
PID 2960 wrote to memory of 3052	2960	onkucad.exe	29
PID 2960 wrote to memory of 3052	2960	onkucad.exe	29
PID 2960 wrote to memory of 3052	2960	onkucad.exe	29
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21
PID 2960 wrote to memory of 1200	2960	onkucad.exe	21

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:416

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1200
- C:\Users\Admin\AppData\Local\Temp\fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe
  "C:\Users\Admin\AppData\Local\Temp\fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2772
- - 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
    - Loads dropped DLL
    - Windows security modification
    - Modifies WinLogon
    - Drops file in System32 directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2960
  - - C:\Windows\SysWOW64\onkucad.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3052

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
3e85afec8d540162035c24cd6d8e8f2a

SHA1
4cef2d7ab36b1dcb1c14de5bbb43ac21f3e6f83b

SHA256
9dd25cf111adb1ec142642321f8c001dc46624e23615120e5ad460e41de82b14

SHA512
4e4dd3f4069f1518c27cb08f04f2e9dc218cec0c007b041aae71efaa154a98c0ef21d90f124a5a5119c999bbb16143a18678486ef260d8b563a875fdda108420

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
6db566c9c1aa0e87242ad6c208b8a0c5

SHA1
5a9938f94f2fa070b61243fa2189fac752b2672c

SHA256
98e4e8972c14b03f23f21b439d928cc7f4fcd300d22198de987aa2335d65c2be

SHA512
90d2eb6e06bfa2de6f5ccb4e818fd34d1f22b71d7d5d401f1671811973ba9e1baa9741bd6982edb5b3a5df4a1d44dd77cb31b82515fc883a74ddb6804e5b631d

Download Submit
\Windows\SysWOW64\onkucad.exe

Filesize
69KB

MD5
b3568f1a119d93595b3e3948895460d3

SHA1
366551c31ff966aa3556764823190610b12360ee

SHA256
fc855b6f23906d0743134442acbf1dffd1cab125fbcd9e3a075c674e956f4e7b

SHA512
bca4f0377e473161bad7994595894118bda88ac67f1e2fb1da7a534c8601abc20a6d90c07cade309efeef192959c965197d8c641a724a43f89e6d58cbb043eaf

Download Submit
memory/2772-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2960-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3052-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download