ramnit | 6ace4ddf63aa8d54b60f01e6aaa4638c27b49dfc64a707e35c004eee09de1c7f

Analysis

max time kernel
122s
max time network
175s
platform
windows7_x64
resource
win7-20220414-en
submitted
24-05-2022 17:41

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General

Target

范伟打天下招财宝辅助/CrackCaptchaAPI.dll
Size

1.4MB
MD5

f7e325222e43131fdc33002feb79e72a
SHA1

7567e8ac0e66df934a59bb47983ef7e5f54035af
SHA256

f9cda9e6e65da73434958d2013530f7224c76f930992de1bfb8b99f3d7a7dc3a
SHA512

fea1263247bab514940d75f44ae6af22d8f757c74e6893a42fbab82e7f55ca7bd9c14a0a08e5ed5748221c9b9eac2bc8647b2b4dcc924f1dfdcf26b8862757a8

Score

10^/10

ramnit banker bootkit persistence spyware stealer trojan worm

Malware Config

Signatures

Ramnit
Ramnit is a versatile family that holds viruses, worms, and Trojans.
trojan spyware stealer worm banker ramnit
Executes dropped EXE 2 IoCs

Processes:

rundll32Srv.exeDesktopLayer.exe

pid process

1984 rundll32Srv.exe
2020 DesktopLayer.exe
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32Srv.exe

pid process

2036 rundll32.exe
1984 rundll32Srv.exe
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1067

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PhysicalDrive0 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe

pid	process
1984	rundll32Srv.exe
2020	DesktopLayer.exe

pid	process
2036	rundll32.exe
1984	rundll32Srv.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

description	ioc	process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe

Drops file in Program Files directory 3 IoCs

Processes:

rundll32Srv.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Microsoft\px87E6.tmp	rundll32Srv.exe
File created	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	rundll32Srv.exe
File opened for modification	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	rundll32Srv.exe

Modifies Internet Explorer settings 1 TTPs 23 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{D401B741-DB9F-11EC-B1DF-6AE7990DC39D} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

DesktopLayer.exe

pid process

2020 DesktopLayer.exe
2020 DesktopLayer.exe
2020 DesktopLayer.exe
2020 DesktopLayer.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

964 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

964 iexplore.exe
964 iexplore.exe
1920 IEXPLORE.EXE
1920 IEXPLORE.EXE
1920 IEXPLORE.EXE
1920 IEXPLORE.EXE

pid	process
2020	DesktopLayer.exe
2020	DesktopLayer.exe
2020	DesktopLayer.exe
2020	DesktopLayer.exe

pid	process
964	iexplore.exe

pid	process
964	iexplore.exe
964	iexplore.exe
1920	IEXPLORE.EXE
1920	IEXPLORE.EXE
1920	IEXPLORE.EXE
1920	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

rundll32.exerundll32.exerundll32Srv.exeDesktopLayer.exeiexplore.exe

description	pid	process	target process
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 1896 wrote to memory of 2036	1896	rundll32.exe	rundll32.exe
PID 2036 wrote to memory of 1984	2036	rundll32.exe	rundll32Srv.exe
PID 2036 wrote to memory of 1984	2036	rundll32.exe	rundll32Srv.exe
PID 2036 wrote to memory of 1984	2036	rundll32.exe	rundll32Srv.exe
PID 2036 wrote to memory of 1984	2036	rundll32.exe	rundll32Srv.exe
PID 1984 wrote to memory of 2020	1984	rundll32Srv.exe	DesktopLayer.exe
PID 1984 wrote to memory of 2020	1984	rundll32Srv.exe	DesktopLayer.exe
PID 1984 wrote to memory of 2020	1984	rundll32Srv.exe	DesktopLayer.exe
PID 1984 wrote to memory of 2020	1984	rundll32Srv.exe	DesktopLayer.exe
PID 2020 wrote to memory of 964	2020	DesktopLayer.exe	iexplore.exe
PID 2020 wrote to memory of 964	2020	DesktopLayer.exe	iexplore.exe
PID 2020 wrote to memory of 964	2020	DesktopLayer.exe	iexplore.exe
PID 2020 wrote to memory of 964	2020	DesktopLayer.exe	iexplore.exe
PID 964 wrote to memory of 1920	964	iexplore.exe	IEXPLORE.EXE
PID 964 wrote to memory of 1920	964	iexplore.exe	IEXPLORE.EXE
PID 964 wrote to memory of 1920	964	iexplore.exe	IEXPLORE.EXE
PID 964 wrote to memory of 1920	964	iexplore.exe	IEXPLORE.EXE

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\范伟打天下招财宝辅助\CrackCaptchaAPI.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1896
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\范伟打天下招财宝辅助\CrackCaptchaAPI.dll,#1
  2⤵
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\SysWOW64\rundll32Srv.exe
    C:\Windows\SysWOW64\rundll32Srv.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - Suspicious use of WriteProcessMemory
    PID:1984
  - - C:\Program Files (x86)\Microsoft\DesktopLayer.exe
      "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:2020

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe"
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:964
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:964 CREDAT:275457 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1920

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Microsoft\DesktopLayer.exe

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C:\Program Files (x86)\Microsoft\DesktopLayer.exe

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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\AC8CJ36Q.txt

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C:\Windows\SysWOW64\rundll32Srv.exe

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C:\Windows\SysWOW64\rundll32Srv.exe

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\Program Files (x86)\Microsoft\DesktopLayer.exe

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\Windows\SysWOW64\rundll32Srv.exe

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memory/1984-64-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

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memory/1984-57-0x0000000000000000-mapping.dmp

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memory/2020-62-0x0000000000000000-mapping.dmp

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memory/2020-67-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

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memory/2036-54-0x0000000000000000-mapping.dmp

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memory/2036-55-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

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