ramnit | b201033f28361af6fd7baeaa5f1e90635198cda68a27f81d7c2baa9f667842bf

Analysis

max time kernel
153s
max time network
134s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30/10/2022, 02:39

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General

Target

b201033f28361af6fd7baeaa5f1e90635198cda68a27f81d7c2baa9f667842bf.dll
Size

691KB
MD5

a2fb9029d34ba7ab009c79f11b519580
SHA1

67534234e28e24857c9f622e20a2f41b311e4cac
SHA256

b201033f28361af6fd7baeaa5f1e90635198cda68a27f81d7c2baa9f667842bf
SHA512

df87748ef041414f88ff705fb7faa794dbaa04d90e324a093f8d68223560b82f7a9c43d099fe3ef42637ccddbc694ea7027ff19ffde4a3984b85b28f9efed8f5
SSDEEP

12288:rNIyZN4+Wv4PLq6Okrh9ZN/hs9DsdSx+R0:r9TPmirh9Zdh6/i0

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
1256	rundll32mgr.exe
2036	WaterMark.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1256-64-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1256-65-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1256-70-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/2036-88-0x0000000000400000-0x0000000000429000-memory.dmp	upx
behavioral1/memory/2036-212-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1956	rundll32.exe
1956	rundll32.exe
1256	rundll32mgr.exe
1256	rundll32mgr.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32mgr.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\WaterMark.exe	rundll32mgr.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
File opened for modification	C:\Program Files\7-Zip\7z.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7z.exe	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px4FC6.tmp	rundll32mgr.exe
File created	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32mgr.exe
File opened for modification	C:\Program Files\7-Zip\7-zip32.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	svchost.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1020	1956	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe
1916	svchost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	WaterMark.exe
Token: SeDebugPrivilege	1916	svchost.exe
Token: SeDebugPrivilege	1956	rundll32.exe
Token: SeDebugPrivilege	2036	WaterMark.exe
Token: SeDebugPrivilege	1020	WerFault.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1256	rundll32mgr.exe
2036	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1476 wrote to memory of 1956	1476	rundll32.exe	27
PID 1956 wrote to memory of 1256	1956	rundll32.exe	28
PID 1956 wrote to memory of 1256	1956	rundll32.exe	28
PID 1956 wrote to memory of 1256	1956	rundll32.exe	28
PID 1956 wrote to memory of 1256	1956	rundll32.exe	28
PID 1256 wrote to memory of 2036	1256	rundll32mgr.exe	29
PID 1256 wrote to memory of 2036	1256	rundll32mgr.exe	29
PID 1256 wrote to memory of 2036	1256	rundll32mgr.exe	29
PID 1256 wrote to memory of 2036	1256	rundll32mgr.exe	29
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 1956 wrote to memory of 1020	1956	rundll32.exe	30
PID 1956 wrote to memory of 1020	1956	rundll32.exe	30
PID 1956 wrote to memory of 1020	1956	rundll32.exe	30
PID 1956 wrote to memory of 1020	1956	rundll32.exe	30
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1760	2036	WaterMark.exe	31
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1916	2036	WaterMark.exe	32
PID 1916 wrote to memory of 260	1916	svchost.exe	7
PID 1916 wrote to memory of 260	1916	svchost.exe	7
PID 1916 wrote to memory of 260	1916	svchost.exe	7
PID 1916 wrote to memory of 260	1916	svchost.exe	7
PID 1916 wrote to memory of 260	1916	svchost.exe	7
PID 1916 wrote to memory of 332	1916	svchost.exe	6
PID 1916 wrote to memory of 332	1916	svchost.exe	6
PID 1916 wrote to memory of 332	1916	svchost.exe	6
PID 1916 wrote to memory of 332	1916	svchost.exe	6
PID 1916 wrote to memory of 332	1916	svchost.exe	6
PID 1916 wrote to memory of 368	1916	svchost.exe	5
PID 1916 wrote to memory of 368	1916	svchost.exe	5
PID 1916 wrote to memory of 368	1916	svchost.exe	5
PID 1916 wrote to memory of 368	1916	svchost.exe	5
PID 1916 wrote to memory of 368	1916	svchost.exe	5
PID 1916 wrote to memory of 376	1916	svchost.exe	4
PID 1916 wrote to memory of 376	1916	svchost.exe	4
PID 1916 wrote to memory of 376	1916	svchost.exe	4
PID 1916 wrote to memory of 376	1916	svchost.exe	4
PID 1916 wrote to memory of 376	1916	svchost.exe	4
PID 1916 wrote to memory of 416	1916	svchost.exe	3
PID 1916 wrote to memory of 416	1916	svchost.exe	3
PID 1916 wrote to memory of 416	1916	svchost.exe	3
PID 1916 wrote to memory of 416	1916	svchost.exe	3
PID 1916 wrote to memory of 416	1916	svchost.exe	3

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:476

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:460
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:788
- - C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    3⤵
    PID:1320
- 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 LocalServiceNoNetwork
  2⤵
  PID:1028
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1228
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:968
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:284
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:868
- - \\?\C:\Windows\system32\wbem\WMIADAP.EXE
    wmiadap.exe /F /T /R
    3⤵
    PID:1712
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:956
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:824
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:748
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:648
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:572

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:376

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:368
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:484

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:1380
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b201033f28361af6fd7baeaa5f1e90635198cda68a27f81d7c2baa9f667842bf.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\b201033f28361af6fd7baeaa5f1e90635198cda68a27f81d7c2baa9f667842bf.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1956
  - - C:\Windows\SysWOW64\rundll32mgr.exe
      C:\Windows\SysWOW64\rundll32mgr.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Program Files directory
      Suspicious use of UnmapMainImage
      Suspicious use of WriteProcessMemory
      PID:1256
    - - 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 UnmapMainImage
        Suspicious use of WriteProcessMemory
        
        PID:2036
      - 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
        
        PID:1760
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1916
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1956 -s 228
      4⤵
      Program crash
      Suspicious use of AdjustPrivilegeToken
      PID:1020

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
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

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

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

Download Submit
C:\Windows\SysWOW64\rundll32mgr.exe

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

Download Submit
C:\Windows\SysWOW64\rundll32mgr.exe

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

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

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

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

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
106KB

MD5
89ec15b65572ad461a12bf515c8e59cf

SHA1
bebc445ba7d5bd55bf1a64df2d99e470299b24ab

SHA256
52b43a62647a170a90d7f62ba5fabb66529e6b9b958367c202d5d9edab5efbd0

SHA512
030217c03de5b34d7a3cf84007e322174f3475c426f7ab922815af4e9910c8a84566a811a97a9f18e2ec1f71b0a495c94b149cc168935b76d9a559908a8db872

Download Submit
memory/1256-65-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1256-64-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1256-70-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1760-79-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1760-89-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1760-213-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1760-83-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1916-91-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1916-94-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1956-55-0x0000000074C11000-0x0000000074C13000-memory.dmp

Filesize
8KB

Download
memory/1956-87-0x0000000000140000-0x0000000000169000-memory.dmp

Filesize
164KB

Download
memory/1956-56-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/1956-58-0x0000000000140000-0x0000000000169000-memory.dmp

Filesize
164KB

Download
memory/1956-886-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/1956-887-0x0000000000140000-0x0000000000169000-memory.dmp

Filesize
164KB

Download
memory/2036-88-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2036-212-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download