ramnit | c7ef1385ab7d9cfbdae403a28ca14a6abda5cf218837e4d04247b642151ed966

Analysis

max time kernel
151s
max time network
136s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 01:55

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General

Target

c7ef1385ab7d9cfbdae403a28ca14a6abda5cf218837e4d04247b642151ed966.dll
Size

472KB
MD5

eeaac30a1688f59236aa5127644d6cc0
SHA1

61008c2b82ea846993d526daa0e85981b0583239
SHA256

c7ef1385ab7d9cfbdae403a28ca14a6abda5cf218837e4d04247b642151ed966
SHA512

21ae16d90248bcd8a94a4953661b86346c9daaaf63e71afbbd6bc600e040630bedca40620e9449b423f7c72e6fa52ae69fd0156109a985991b62b54dbd3c1bcb
SSDEEP

12288:jehnaNPpSVZmNxRCwnwm3W3OHIIf53VO:jeh0PpS6NxNnwYeOHXD

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
2040	rundll32Srv.exe
436	WaterMark.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b00000001232f-56.dat	upx
behavioral1/files/0x000b00000001232f-57.dat	upx
behavioral1/files/0x000b00000001232f-59.dat	upx
behavioral1/memory/2040-65-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/files/0x000b00000001232f-63.dat	upx
behavioral1/files/0x0008000000012750-66.dat	upx
behavioral1/files/0x0008000000012750-67.dat	upx
behavioral1/files/0x0008000000012750-69.dat	upx
behavioral1/files/0x0008000000012750-70.dat	upx
behavioral1/memory/436-80-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/memory/436-215-0x0000000000400000-0x000000000045A000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1652	rundll32.exe
1652	rundll32.exe
2040	rundll32Srv.exe
2040	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 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px13D0.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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1188	1652	WerFault.exe	28

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
436	WaterMark.exe
436	WaterMark.exe
436	WaterMark.exe
436	WaterMark.exe
436	WaterMark.exe
436	WaterMark.exe
436	WaterMark.exe
436	WaterMark.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe
1680	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1188	WerFault.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	436	WaterMark.exe
Token: SeDebugPrivilege	1680	svchost.exe
Token: SeDebugPrivilege	1652	rundll32.exe
Token: SeDebugPrivilege	1188	WerFault.exe
Token: SeDebugPrivilege	436	WaterMark.exe
Token: SeDebugPrivilege	2036	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1320 wrote to memory of 1652	1320	rundll32.exe	28
PID 1652 wrote to memory of 2040	1652	rundll32.exe	29
PID 1652 wrote to memory of 2040	1652	rundll32.exe	29
PID 1652 wrote to memory of 2040	1652	rundll32.exe	29
PID 1652 wrote to memory of 2040	1652	rundll32.exe	29
PID 1652 wrote to memory of 1188	1652	rundll32.exe	30
PID 1652 wrote to memory of 1188	1652	rundll32.exe	30
PID 1652 wrote to memory of 1188	1652	rundll32.exe	30
PID 1652 wrote to memory of 1188	1652	rundll32.exe	30
PID 2040 wrote to memory of 436	2040	rundll32Srv.exe	31
PID 2040 wrote to memory of 436	2040	rundll32Srv.exe	31
PID 2040 wrote to memory of 436	2040	rundll32Srv.exe	31
PID 2040 wrote to memory of 436	2040	rundll32Srv.exe	31
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 2036	436	WaterMark.exe	32
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 436 wrote to memory of 1680	436	WaterMark.exe	33
PID 1680 wrote to memory of 260	1680	svchost.exe	26
PID 1680 wrote to memory of 260	1680	svchost.exe	26
PID 1680 wrote to memory of 260	1680	svchost.exe	26
PID 1680 wrote to memory of 260	1680	svchost.exe	26
PID 1680 wrote to memory of 260	1680	svchost.exe	26
PID 1680 wrote to memory of 332	1680	svchost.exe	25
PID 1680 wrote to memory of 332	1680	svchost.exe	25
PID 1680 wrote to memory of 332	1680	svchost.exe	25
PID 1680 wrote to memory of 332	1680	svchost.exe	25
PID 1680 wrote to memory of 332	1680	svchost.exe	25
PID 1680 wrote to memory of 368	1680	svchost.exe	24
PID 1680 wrote to memory of 368	1680	svchost.exe	24
PID 1680 wrote to memory of 368	1680	svchost.exe	24
PID 1680 wrote to memory of 368	1680	svchost.exe	24
PID 1680 wrote to memory of 368	1680	svchost.exe	24
PID 1680 wrote to memory of 384	1680	svchost.exe	23
PID 1680 wrote to memory of 384	1680	svchost.exe	23
PID 1680 wrote to memory of 384	1680	svchost.exe	23
PID 1680 wrote to memory of 384	1680	svchost.exe	23
PID 1680 wrote to memory of 384	1680	svchost.exe	23
PID 1680 wrote to memory of 420	1680	svchost.exe	3
PID 1680 wrote to memory of 420	1680	svchost.exe	3
PID 1680 wrote to memory of 420	1680	svchost.exe	3
PID 1680 wrote to memory of 420	1680	svchost.exe	3
PID 1680 wrote to memory of 420	1680	svchost.exe	3

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\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:656
- 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:1200
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:276
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1112
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:304
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1016
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1032
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:328
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:864
- 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 LocalServiceNetworkRestricted
  2⤵
  PID:736
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:576

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

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
PID:488

C:\Windows\system32\wbem\wmiprvse.exe
C:\Windows\system32\wbem\wmiprvse.exe
1⤵
PID:1976

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1716

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1248
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c7ef1385ab7d9cfbdae403a28ca14a6abda5cf218837e4d04247b642151ed966.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1320
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\c7ef1385ab7d9cfbdae403a28ca14a6abda5cf218837e4d04247b642151ed966.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1652
  - - 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:2040
    - - 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:436
      - 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:2036
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1680
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 228
      4⤵
      Program crash
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:1188

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:368

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

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/436-215-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/436-80-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1652-61-0x0000000010000000-0x0000000010078000-memory.dmp

Filesize
480KB

Download
memory/1652-214-0x0000000000170000-0x00000000001CA000-memory.dmp

Filesize
360KB

Download
memory/1652-64-0x0000000000170000-0x00000000001CA000-memory.dmp

Filesize
360KB

Download
memory/1652-62-0x0000000000170000-0x00000000001CA000-memory.dmp

Filesize
360KB

Download
memory/1652-216-0x0000000010000000-0x0000000010078000-memory.dmp

Filesize
480KB

Download
memory/1652-55-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download
memory/1680-83-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1680-86-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/2036-81-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2036-76-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2036-72-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2040-65-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download