ramnit | 7636fcdd3f40e7407ed00e00f9ca3f329abba64eb461c38873a4610dae34f334

Analysis

max time kernel
151s
max time network
125s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30-10-2022 23:11

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General

Target

7636fcdd3f40e7407ed00e00f9ca3f329abba64eb461c38873a4610dae34f334.dll
Size

240KB
MD5

a10b05144aa44c696ddd051e3bf9f180
SHA1

24a39bb841865cd4b597098fc9c7749309b6fe37
SHA256

7636fcdd3f40e7407ed00e00f9ca3f329abba64eb461c38873a4610dae34f334
SHA512

84e5a9f2ea47f989f036d397f27f148731e69191f6f9081096f1da5ad8bfc3698627ceacff68a6beda389aa3206b3192e3032a0413878b49597d1bdf414b3b68
SSDEEP

3072:Zn4cV8gf2u41Z5tKlwqudua6aRVoFktlmRoUhD:N4y8gOl25Edkkt2oUhD

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
1296	rundll32mgr.exe
1532	WaterMark.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1296-62-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1296-63-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1296-69-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1532-75-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/1532-76-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/1532-193-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1632	rundll32.exe
1632	rundll32.exe
1296	rundll32mgr.exe
1296	rundll32mgr.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\dmlconf.dat	svchost.exe
File created	C:\Windows\SysWOW64\rundll32mgr.exe	rundll32.exe
File created	C:\Windows\SysWOW64\dmlconf.dat	svchost.exe

Drops file in Program Files directory 8 IoCs

description	ioc	Process
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\7z.exe	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\pxE6F6.tmp	rundll32mgr.exe
File created	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32mgr.exe
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

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1532	WaterMark.exe
1532	WaterMark.exe
1532	WaterMark.exe
1532	WaterMark.exe
1532	WaterMark.exe
1532	WaterMark.exe
1532	WaterMark.exe
1532	WaterMark.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe
1588	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1532	WaterMark.exe
Token: SeDebugPrivilege	1588	svchost.exe
Token: SeDebugPrivilege	1532	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1296	rundll32mgr.exe
1532	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 912 wrote to memory of 1632	912	rundll32.exe	27
PID 1632 wrote to memory of 1296	1632	rundll32.exe	28
PID 1632 wrote to memory of 1296	1632	rundll32.exe	28
PID 1632 wrote to memory of 1296	1632	rundll32.exe	28
PID 1632 wrote to memory of 1296	1632	rundll32.exe	28
PID 1296 wrote to memory of 1532	1296	rundll32mgr.exe	29
PID 1296 wrote to memory of 1532	1296	rundll32mgr.exe	29
PID 1296 wrote to memory of 1532	1296	rundll32mgr.exe	29
PID 1296 wrote to memory of 1532	1296	rundll32mgr.exe	29
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 240	1532	WaterMark.exe	30
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1532 wrote to memory of 1588	1532	WaterMark.exe	31
PID 1588 wrote to memory of 260	1588	svchost.exe	7
PID 1588 wrote to memory of 260	1588	svchost.exe	7
PID 1588 wrote to memory of 260	1588	svchost.exe	7
PID 1588 wrote to memory of 260	1588	svchost.exe	7
PID 1588 wrote to memory of 260	1588	svchost.exe	7
PID 1588 wrote to memory of 332	1588	svchost.exe	6
PID 1588 wrote to memory of 332	1588	svchost.exe	6
PID 1588 wrote to memory of 332	1588	svchost.exe	6
PID 1588 wrote to memory of 332	1588	svchost.exe	6
PID 1588 wrote to memory of 332	1588	svchost.exe	6
PID 1588 wrote to memory of 368	1588	svchost.exe	5
PID 1588 wrote to memory of 368	1588	svchost.exe	5
PID 1588 wrote to memory of 368	1588	svchost.exe	5
PID 1588 wrote to memory of 368	1588	svchost.exe	5
PID 1588 wrote to memory of 368	1588	svchost.exe	5
PID 1588 wrote to memory of 380	1588	svchost.exe	4
PID 1588 wrote to memory of 380	1588	svchost.exe	4
PID 1588 wrote to memory of 380	1588	svchost.exe	4
PID 1588 wrote to memory of 380	1588	svchost.exe	4
PID 1588 wrote to memory of 380	1588	svchost.exe	4
PID 1588 wrote to memory of 416	1588	svchost.exe	3
PID 1588 wrote to memory of 416	1588	svchost.exe	3
PID 1588 wrote to memory of 416	1588	svchost.exe	3
PID 1588 wrote to memory of 416	1588	svchost.exe	3
PID 1588 wrote to memory of 416	1588	svchost.exe	3
PID 1588 wrote to memory of 460	1588	svchost.exe	2
PID 1588 wrote to memory of 460	1588	svchost.exe	2
PID 1588 wrote to memory of 460	1588	svchost.exe	2
PID 1588 wrote to memory of 460	1588	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:460
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1620
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1184
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1240
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1044
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:304
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:336
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:880
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:848
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:812
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:768
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:680
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:600

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: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:332

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

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:2028

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1380
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\7636fcdd3f40e7407ed00e00f9ca3f329abba64eb461c38873a4610dae34f334.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:912
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\7636fcdd3f40e7407ed00e00f9ca3f329abba64eb461c38873a4610dae34f334.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1632
  - - 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:1296
    - - 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:1532
      - 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:240
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1588

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1340

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
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

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

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

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

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

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

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

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

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

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

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
148KB

MD5
6ef826e85bf6d60539fa8fea1207c60f

SHA1
cd2ac10720d245997b3a9e9eaa8d527d06dec02a

SHA256
671133f733c22443400b08440c43d474c3c2064754c31da51bf68929216a1bb9

SHA512
25a931328f203f3387d0c72ef38de3ccbc30010c726d18e9fd605921e131b2c490135a593a77440ead7ec1bcfcb7f352920eaa79ebbd1ca7adb58141aa873fb9

Download Submit
memory/240-86-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/240-78-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/240-82-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/240-194-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1296-62-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1296-69-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1296-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1532-75-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1532-76-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1532-193-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1588-88-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1588-91-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1632-55-0x00000000761F1000-0x00000000761F3000-memory.dmp

Filesize
8KB

Download