ramnit | a95bd73e6a5d85b0917df4e6ce4c407c6a9b677e9d3da2a998b0de804e91c2c8

Analysis

max time kernel
151s
max time network
154s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 02:01

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General

Target

a95bd73e6a5d85b0917df4e6ce4c407c6a9b677e9d3da2a998b0de804e91c2c8.dll
Size

180KB
MD5

f9a0fd9594d9b8573c53772bc15d11e0
SHA1

492c0faad24bcd6ca6a362edd2f21f624d1645bd
SHA256

a95bd73e6a5d85b0917df4e6ce4c407c6a9b677e9d3da2a998b0de804e91c2c8
SHA512

4e4a1a064c5518005647891576af1564db473f6d6b7335fcb5386dcb6bc581eadfd0a300129fbb545bbf2f5ed31cfcfd9e42c88b5b8f532b9197b297d3e75d3f
SSDEEP

3072:en4cV8gf2u41Z5tKlH7CzACLtRk3OwquXvz7+IGqEJuj:M4y8gOl2xMA2X5uX7VGjJuj

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
1032	rundll32Srv.exe
1176	WaterMark.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b00000001231b-56.dat	upx
behavioral1/files/0x000b00000001231b-57.dat	upx
behavioral1/files/0x000b00000001231b-59.dat	upx
behavioral1/memory/1032-62-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/files/0x000b00000001231b-63.dat	upx
behavioral1/files/0x001b00000001249b-64.dat	upx
behavioral1/memory/1032-68-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/files/0x001b00000001249b-67.dat	upx
behavioral1/files/0x001b00000001249b-65.dat	upx
behavioral1/files/0x001b00000001249b-69.dat	upx
behavioral1/memory/1176-79-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/memory/1176-197-0x0000000000400000-0x000000000045A000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1788	rundll32.exe
1788	rundll32.exe
1032	rundll32Srv.exe
1032	rundll32Srv.exe

Drops file in System32 directory 3 IoCs

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

Drops file in Program Files directory 10 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\7zFM.exe	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px758E.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
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 27 IoCs

pid	Process
1176	WaterMark.exe
1176	WaterMark.exe
1176	WaterMark.exe
1176	WaterMark.exe
1176	WaterMark.exe
1176	WaterMark.exe
1176	WaterMark.exe
1176	WaterMark.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe
1820	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	WaterMark.exe
Token: SeDebugPrivilege	1820	svchost.exe
Token: SeDebugPrivilege	1176	WaterMark.exe
Token: SeDebugPrivilege	680	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 940 wrote to memory of 1788	940	rundll32.exe	28
PID 1788 wrote to memory of 1032	1788	rundll32.exe	29
PID 1788 wrote to memory of 1032	1788	rundll32.exe	29
PID 1788 wrote to memory of 1032	1788	rundll32.exe	29
PID 1788 wrote to memory of 1032	1788	rundll32.exe	29
PID 1032 wrote to memory of 1176	1032	rundll32Srv.exe	30
PID 1032 wrote to memory of 1176	1032	rundll32Srv.exe	30
PID 1032 wrote to memory of 1176	1032	rundll32Srv.exe	30
PID 1032 wrote to memory of 1176	1032	rundll32Srv.exe	30
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 680	1176	WaterMark.exe	31
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1176 wrote to memory of 1820	1176	WaterMark.exe	32
PID 1820 wrote to memory of 260	1820	svchost.exe	7
PID 1820 wrote to memory of 260	1820	svchost.exe	7
PID 1820 wrote to memory of 260	1820	svchost.exe	7
PID 1820 wrote to memory of 260	1820	svchost.exe	7
PID 1820 wrote to memory of 260	1820	svchost.exe	7
PID 1820 wrote to memory of 332	1820	svchost.exe	6
PID 1820 wrote to memory of 332	1820	svchost.exe	6
PID 1820 wrote to memory of 332	1820	svchost.exe	6
PID 1820 wrote to memory of 332	1820	svchost.exe	6
PID 1820 wrote to memory of 332	1820	svchost.exe	6
PID 1820 wrote to memory of 368	1820	svchost.exe	5
PID 1820 wrote to memory of 368	1820	svchost.exe	5
PID 1820 wrote to memory of 368	1820	svchost.exe	5
PID 1820 wrote to memory of 368	1820	svchost.exe	5
PID 1820 wrote to memory of 368	1820	svchost.exe	5
PID 1820 wrote to memory of 380	1820	svchost.exe	4
PID 1820 wrote to memory of 380	1820	svchost.exe	4
PID 1820 wrote to memory of 380	1820	svchost.exe	4
PID 1820 wrote to memory of 380	1820	svchost.exe	4
PID 1820 wrote to memory of 380	1820	svchost.exe	4
PID 1820 wrote to memory of 416	1820	svchost.exe	3
PID 1820 wrote to memory of 416	1820	svchost.exe	3
PID 1820 wrote to memory of 416	1820	svchost.exe	3
PID 1820 wrote to memory of 416	1820	svchost.exe	3
PID 1820 wrote to memory of 416	1820	svchost.exe	3
PID 1820 wrote to memory of 464	1820	svchost.exe	2
PID 1820 wrote to memory of 464	1820	svchost.exe	2
PID 1820 wrote to memory of 464	1820	svchost.exe	2
PID 1820 wrote to memory of 464	1820	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 LocalServiceNetworkRestricted
  2⤵
  PID:752
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:668
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:800
- - C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    3⤵
    PID:1304
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:876
- - \\?\C:\Windows\system32\wbem\WMIADAP.EXE
    wmiadap.exe /F /T /R
    3⤵
    PID:1704
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:1008
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1216
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1036
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:908
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:748
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:108
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:832
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:588

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\system32\wbem\wmiprvse.exe
C:\Windows\system32\wbem\wmiprvse.exe
1⤵
PID:1972

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1376
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a95bd73e6a5d85b0917df4e6ce4c407c6a9b677e9d3da2a998b0de804e91c2c8.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:940
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\a95bd73e6a5d85b0917df4e6ce4c407c6a9b677e9d3da2a998b0de804e91c2c8.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1788
  - - 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:1032
    - - 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:1176
      - 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:680
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1820

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
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

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

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

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

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

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

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

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

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

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

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
dba1231fa077c41836df91398093d5a8

SHA1
9bd1adff712907f1cbff38194e7229af5d9b2938

SHA256
10576d998ccc0c450ac3bb8199eda18f5dd01336101eb1cfe357f33b520b5f0a

SHA512
ec8f9d266a926010b94cb244e2ef90704a1209cafa18d80af9637fa81d56a929aa2a9d4ebbdd1b86a1d9cf632ddbd0f0f86e5894aa8248784518f2153e509a1f

Download Submit
memory/680-75-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/680-71-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/680-199-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/680-80-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1032-68-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1032-62-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-79-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-197-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1788-55-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

Download
memory/1788-60-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1788-198-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1788-61-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1820-82-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1820-85-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download