ramnit | 11c8085ec0bfc6dac3254f7f4c34b7a82f62f6970c65ec063d50db7d527e5be0

Analysis

max time kernel
151s
max time network
154s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 02:31

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General

Target

11c8085ec0bfc6dac3254f7f4c34b7a82f62f6970c65ec063d50db7d527e5be0.dll
Size

180KB
MD5

cd67d3e20a6763b2380627b747d5f450
SHA1

37c49e5454bddd0fc8da6c64974f753f2061e83a
SHA256

11c8085ec0bfc6dac3254f7f4c34b7a82f62f6970c65ec063d50db7d527e5be0
SHA512

e80205c50b62213188c3096aacb73293184f114ebbdf02e9f9cf97122780f7a164a609862586665d49bae29d2a8c4dd8b5f6a646556ed055a2453dc7b8f8f617
SSDEEP

3072:Cn4cV8gf2u41Z5tKlI1I+hcj0B/pTBpwtqrFZz63vB24FXnHKP:I4y8gOl2+6A20BtXfWvBlFXnHKP

Score

10^/10

ramnit banker persistence spyware stealer trojan upx worm

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,c:\\program files (x86)\\microsoft\\watermark.exe"	svchost.exe

Ramnit
Ramnit is a versatile family that holds viruses, worms, and Trojans.
trojan spyware stealer worm banker ramnit

Executes dropped EXE 2 IoCs

pid	Process
1624	rundll32Srv.exe
552	WaterMark.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0008000000005c51-56.dat	upx
behavioral1/files/0x0008000000005c51-57.dat	upx
behavioral1/files/0x0008000000005c51-59.dat	upx
behavioral1/memory/1624-60-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/files/0x0008000000005c51-61.dat	upx
behavioral1/files/0x000800000001448d-62.dat	upx
behavioral1/files/0x000800000001448d-63.dat	upx
behavioral1/memory/1624-66-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/files/0x000800000001448d-65.dat	upx
behavioral1/files/0x000800000001448d-67.dat	upx
behavioral1/memory/552-77-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/memory/552-191-0x0000000000400000-0x000000000045B000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1516	rundll32.exe
1516	rundll32.exe
1624	rundll32Srv.exe
1624	rundll32Srv.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe
File created	C:\Windows\SysWOW64\dmlconf.dat	svchost.exe
File opened for modification	C:\Windows\SysWOW64\dmlconf.dat	svchost.exe

Drops file in Program Files directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\px1FD1.tmp	rundll32Srv.exe
File opened for modification	C:\Program Files\7-Zip\7-zip.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7-zip32.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7z.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	svchost.exe
File created	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32Srv.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32Srv.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7z.exe	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	svchost.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
552	WaterMark.exe
552	WaterMark.exe
552	WaterMark.exe
552	WaterMark.exe
552	WaterMark.exe
552	WaterMark.exe
552	WaterMark.exe
552	WaterMark.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe
1360	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	552	WaterMark.exe
Token: SeDebugPrivilege	1360	svchost.exe
Token: SeDebugPrivilege	552	WaterMark.exe
Token: SeDebugPrivilege	1696	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1624 wrote to memory of 552	1624	rundll32Srv.exe	29
PID 1624 wrote to memory of 552	1624	rundll32Srv.exe	29
PID 1624 wrote to memory of 552	1624	rundll32Srv.exe	29
PID 1624 wrote to memory of 552	1624	rundll32Srv.exe	29
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1696	552	WaterMark.exe	30
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 552 wrote to memory of 1360	552	WaterMark.exe	31
PID 1360 wrote to memory of 260	1360	svchost.exe	7
PID 1360 wrote to memory of 260	1360	svchost.exe	7
PID 1360 wrote to memory of 260	1360	svchost.exe	7
PID 1360 wrote to memory of 260	1360	svchost.exe	7
PID 1360 wrote to memory of 260	1360	svchost.exe	7
PID 1360 wrote to memory of 332	1360	svchost.exe	6
PID 1360 wrote to memory of 332	1360	svchost.exe	6
PID 1360 wrote to memory of 332	1360	svchost.exe	6
PID 1360 wrote to memory of 332	1360	svchost.exe	6
PID 1360 wrote to memory of 332	1360	svchost.exe	6
PID 1360 wrote to memory of 368	1360	svchost.exe	5
PID 1360 wrote to memory of 368	1360	svchost.exe	5
PID 1360 wrote to memory of 368	1360	svchost.exe	5
PID 1360 wrote to memory of 368	1360	svchost.exe	5
PID 1360 wrote to memory of 368	1360	svchost.exe	5
PID 1360 wrote to memory of 380	1360	svchost.exe	4
PID 1360 wrote to memory of 380	1360	svchost.exe	4
PID 1360 wrote to memory of 380	1360	svchost.exe	4
PID 1360 wrote to memory of 380	1360	svchost.exe	4
PID 1360 wrote to memory of 380	1360	svchost.exe	4
PID 1360 wrote to memory of 416	1360	svchost.exe	3
PID 1360 wrote to memory of 416	1360	svchost.exe	3
PID 1360 wrote to memory of 416	1360	svchost.exe	3
PID 1360 wrote to memory of 416	1360	svchost.exe	3
PID 1360 wrote to memory of 416	1360	svchost.exe	3
PID 1360 wrote to memory of 464	1360	svchost.exe	2
PID 1360 wrote to memory of 464	1360	svchost.exe	2
PID 1360 wrote to memory of 464	1360	svchost.exe	2
PID 1360 wrote to memory of 464	1360	svchost.exe	2

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:472

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:464
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:672
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:808
- - C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    3⤵
    PID:1180
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:844
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:756
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:884
- - \\?\C:\Windows\system32\wbem\WMIADAP.EXE
    wmiadap.exe /F /T /R
    3⤵
    PID:1132
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:328
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:592
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:932
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1080
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1116
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1640
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1756

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

C:\Windows\system32\csrss.exe
%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16
1⤵
PID:380

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:368
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:480

C:\Windows\system32\csrss.exe
%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16
1⤵
PID:332

C:\Windows\System32\smss.exe
\SystemRoot\System32\smss.exe
1⤵
PID:260

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1236
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\11c8085ec0bfc6dac3254f7f4c34b7a82f62f6970c65ec063d50db7d527e5be0.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\11c8085ec0bfc6dac3254f7f4c34b7a82f62f6970c65ec063d50db7d527e5be0.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1516
  - - C:\Windows\SysWOW64\rundll32Srv.exe
      C:\Windows\SysWOW64\rundll32Srv.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Program Files directory
      Suspicious use of WriteProcessMemory
      PID:1624
    - - C:\Program Files (x86)\Microsoft\WaterMark.exe
        
        "C:\Program Files (x86)\Microsoft\WaterMark.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:552
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Modifies WinLogon for persistence
        Drops file in System32 directory
        Drops file in Program Files directory
        Suspicious use of AdjustPrivilegeToken
        
        PID:1696
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1360

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
C:\Program Files (x86)\Microsoft\WaterMark.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
\Program Files (x86)\Microsoft\WaterMark.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
\Program Files (x86)\Microsoft\WaterMark.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
memory/552-191-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/552-77-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/552-135-0x0000000020020000-0x000000002002B000-memory.dmp

Filesize
44KB

Download
memory/1360-83-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1360-80-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1516-55-0x0000000075111000-0x0000000075113000-memory.dmp

Filesize
8KB

Download
memory/1624-60-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1624-66-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1696-78-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1696-73-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1696-69-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download