ramnit | 3496f0b95ab1e34ba50e9fd378fdf536692bd9c75d10f95e04e6deb60684e47f

Analysis

max time kernel
152s
max time network
169s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 02:26

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General

Target

3496f0b95ab1e34ba50e9fd378fdf536692bd9c75d10f95e04e6deb60684e47f.dll
Size

180KB
MD5

9c73c76055cc59b5bc931dd3d97af240
SHA1

8accf73064536bfc62741530e0cc39cfb2293aa6
SHA256

3496f0b95ab1e34ba50e9fd378fdf536692bd9c75d10f95e04e6deb60684e47f
SHA512

9b7ce38c429e01b06fb2ff33737ae755dd53c8dc08cc91d68f7974ff8f7c5724f630f4aaac54707535ef9297b5b37f9588b1c91cf03475cd22577432d9636a64
SSDEEP

3072:Yn4cV8gf2u41Z5tKlnk0cA+yJWbg5nxw64ApZb8fi:y4y8gOl2G05Ju64w8q

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
1420	rundll32Srv.exe
1408	WaterMark.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00140000000054ab-56.dat	upx
behavioral1/files/0x00140000000054ab-59.dat	upx
behavioral1/files/0x00140000000054ab-57.dat	upx
behavioral1/files/0x00140000000054ab-60.dat	upx
behavioral1/files/0x0008000000013359-61.dat	upx
behavioral1/files/0x0008000000013359-62.dat	upx
behavioral1/memory/1420-65-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/files/0x0008000000013359-64.dat	upx
behavioral1/memory/1408-66-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/files/0x0008000000013359-67.dat	upx
behavioral1/memory/1408-77-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/memory/1408-195-0x0000000000400000-0x000000000045B000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1948	rundll32.exe
1948	rundll32.exe
1420	rundll32Srv.exe
1420	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 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\px34A8.tmp	rundll32Srv.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\7-zip.dll	svchost.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1408	WaterMark.exe
1408	WaterMark.exe
1408	WaterMark.exe
1408	WaterMark.exe
1408	WaterMark.exe
1408	WaterMark.exe
1408	WaterMark.exe
1408	WaterMark.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe
1156	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1408	WaterMark.exe
Token: SeDebugPrivilege	1156	svchost.exe
Token: SeDebugPrivilege	1408	WaterMark.exe
Token: SeDebugPrivilege	852	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1952 wrote to memory of 1948	1952	rundll32.exe	28
PID 1948 wrote to memory of 1420	1948	rundll32.exe	29
PID 1948 wrote to memory of 1420	1948	rundll32.exe	29
PID 1948 wrote to memory of 1420	1948	rundll32.exe	29
PID 1948 wrote to memory of 1420	1948	rundll32.exe	29
PID 1420 wrote to memory of 1408	1420	rundll32Srv.exe	30
PID 1420 wrote to memory of 1408	1420	rundll32Srv.exe	30
PID 1420 wrote to memory of 1408	1420	rundll32Srv.exe	30
PID 1420 wrote to memory of 1408	1420	rundll32Srv.exe	30
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 852	1408	WaterMark.exe	31
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1408 wrote to memory of 1156	1408	WaterMark.exe	32
PID 1156 wrote to memory of 260	1156	svchost.exe	7
PID 1156 wrote to memory of 260	1156	svchost.exe	7
PID 1156 wrote to memory of 260	1156	svchost.exe	7
PID 1156 wrote to memory of 260	1156	svchost.exe	7
PID 1156 wrote to memory of 260	1156	svchost.exe	7
PID 1156 wrote to memory of 336	1156	svchost.exe	6
PID 1156 wrote to memory of 336	1156	svchost.exe	6
PID 1156 wrote to memory of 336	1156	svchost.exe	6
PID 1156 wrote to memory of 336	1156	svchost.exe	6
PID 1156 wrote to memory of 336	1156	svchost.exe	6
PID 1156 wrote to memory of 372	1156	svchost.exe	5
PID 1156 wrote to memory of 372	1156	svchost.exe	5
PID 1156 wrote to memory of 372	1156	svchost.exe	5
PID 1156 wrote to memory of 372	1156	svchost.exe	5
PID 1156 wrote to memory of 372	1156	svchost.exe	5
PID 1156 wrote to memory of 384	1156	svchost.exe	4
PID 1156 wrote to memory of 384	1156	svchost.exe	4
PID 1156 wrote to memory of 384	1156	svchost.exe	4
PID 1156 wrote to memory of 384	1156	svchost.exe	4
PID 1156 wrote to memory of 384	1156	svchost.exe	4
PID 1156 wrote to memory of 420	1156	svchost.exe	3
PID 1156 wrote to memory of 420	1156	svchost.exe	3
PID 1156 wrote to memory of 420	1156	svchost.exe	3
PID 1156 wrote to memory of 420	1156	svchost.exe	3
PID 1156 wrote to memory of 420	1156	svchost.exe	3
PID 1156 wrote to memory of 472	1156	svchost.exe	2
PID 1156 wrote to memory of 472	1156	svchost.exe	2
PID 1156 wrote to memory of 472	1156	svchost.exe	2
PID 1156 wrote to memory of 472	1156	svchost.exe	2

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:480

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:472
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:744
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1772
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1032
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1120
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1076
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:300
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:888
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:836
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:804
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:760
- 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 DcomLaunch
  2⤵
  PID:592

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:420

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:384

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:372
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:488

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:336

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

C:\Windows\system32\wbem\wmiprvse.exe
C:\Windows\system32\wbem\wmiprvse.exe
1⤵
PID:2036

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1992

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3496f0b95ab1e34ba50e9fd378fdf536692bd9c75d10f95e04e6deb60684e47f.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\3496f0b95ab1e34ba50e9fd378fdf536692bd9c75d10f95e04e6deb60684e47f.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - 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:1420
    - - 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:1408
      - 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:852
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1156

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1164

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

Loading Replay Monitor...

Downloads

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

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

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

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

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

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

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

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

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

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

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

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
1be1f21cd2a60ced5a3acd404a1f2ea6

SHA1
fff6a565164de7098aa12ee4d45dc90b15e465a8

SHA256
f35ddd14ca635ae01b84248809b5e73ba03bde56ee1b0a1595109d3e6d87f8d1

SHA512
8f78a9b1a6f29e15bc729be9157bfc6f745989e27d65cd13d1ef2238b3bf58069dfbd4ba17a0cec0395ed87f98ba99bfc80f5410aa8611c2fc2861c001930ff7

Download Submit
memory/852-73-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/852-78-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/852-69-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1156-83-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1156-80-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1408-66-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1408-77-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1408-195-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1420-65-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1948-55-0x00000000762F1000-0x00000000762F3000-memory.dmp

Filesize
8KB

Download