ramnit | be23ba1629b95f90538753d5eca01909431fe880d1f8fca627ab036ca8dd02f0

Analysis

max time kernel
151s
max time network
153s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 01:57

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General

Target

be23ba1629b95f90538753d5eca01909431fe880d1f8fca627ab036ca8dd02f0.dll
Size

180KB
MD5

d3cfeb2fff051c170cf1e874af3b6300
SHA1

5ec026d8bb6b1bb506ac1b484478c036a181021e
SHA256

be23ba1629b95f90538753d5eca01909431fe880d1f8fca627ab036ca8dd02f0
SHA512

4c43f4ea33aa7f4de561244dcc57cfb0d431ab3ab95c57529ff2a65e53be6e0055efb950ebc335be09c38dfdff50cee32841c38c5e801506ec94c1773af0af9d
SSDEEP

3072:wn4cV8gf2u41Z5tKlr78vicYq2tRtuNXF6Ge:q4y8gOl2578vicIUF6

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
1984	rundll32Srv.exe
1488	WaterMark.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000005c50-56.dat	upx
behavioral1/memory/2032-58-0x0000000000300000-0x000000000035A000-memory.dmp	upx
behavioral1/files/0x0007000000005c50-59.dat	upx
behavioral1/files/0x0007000000005c50-61.dat	upx
behavioral1/files/0x0007000000005c50-62.dat	upx
behavioral1/files/0x0009000000014d16-63.dat	upx
behavioral1/files/0x0009000000014d16-64.dat	upx
behavioral1/memory/1984-67-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/files/0x0009000000014d16-66.dat	upx
behavioral1/memory/1488-68-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/files/0x0009000000014d16-69.dat	upx
behavioral1/memory/1488-79-0x0000000000400000-0x000000000045A000-memory.dmp	upx
behavioral1/memory/1488-189-0x0000000000400000-0x000000000045A000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
2032	rundll32.exe
2032	rundll32.exe
1984	rundll32Srv.exe
1984	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 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\7-Zip\7z.exe	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
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	svchost.exe
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\7-zip.dll	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px8A08.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

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
1488	WaterMark.exe
1488	WaterMark.exe
1488	WaterMark.exe
1488	WaterMark.exe
1488	WaterMark.exe
1488	WaterMark.exe
1488	WaterMark.exe
1488	WaterMark.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe
1824	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1488	WaterMark.exe
Token: SeDebugPrivilege	1824	svchost.exe
Token: SeDebugPrivilege	1488	WaterMark.exe
Token: SeDebugPrivilege	2000	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 784 wrote to memory of 2032	784	rundll32.exe	26
PID 2032 wrote to memory of 1984	2032	rundll32.exe	27
PID 2032 wrote to memory of 1984	2032	rundll32.exe	27
PID 2032 wrote to memory of 1984	2032	rundll32.exe	27
PID 2032 wrote to memory of 1984	2032	rundll32.exe	27
PID 1984 wrote to memory of 1488	1984	rundll32Srv.exe	28
PID 1984 wrote to memory of 1488	1984	rundll32Srv.exe	28
PID 1984 wrote to memory of 1488	1984	rundll32Srv.exe	28
PID 1984 wrote to memory of 1488	1984	rundll32Srv.exe	28
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 2000	1488	WaterMark.exe	29
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1488 wrote to memory of 1824	1488	WaterMark.exe	30
PID 1824 wrote to memory of 260	1824	svchost.exe	7
PID 1824 wrote to memory of 260	1824	svchost.exe	7
PID 1824 wrote to memory of 260	1824	svchost.exe	7
PID 1824 wrote to memory of 260	1824	svchost.exe	7
PID 1824 wrote to memory of 260	1824	svchost.exe	7
PID 1824 wrote to memory of 332	1824	svchost.exe	6
PID 1824 wrote to memory of 332	1824	svchost.exe	6
PID 1824 wrote to memory of 332	1824	svchost.exe	6
PID 1824 wrote to memory of 332	1824	svchost.exe	6
PID 1824 wrote to memory of 332	1824	svchost.exe	6
PID 1824 wrote to memory of 368	1824	svchost.exe	5
PID 1824 wrote to memory of 368	1824	svchost.exe	5
PID 1824 wrote to memory of 368	1824	svchost.exe	5
PID 1824 wrote to memory of 368	1824	svchost.exe	5
PID 1824 wrote to memory of 368	1824	svchost.exe	5
PID 1824 wrote to memory of 376	1824	svchost.exe	4
PID 1824 wrote to memory of 376	1824	svchost.exe	4
PID 1824 wrote to memory of 376	1824	svchost.exe	4
PID 1824 wrote to memory of 376	1824	svchost.exe	4
PID 1824 wrote to memory of 376	1824	svchost.exe	4
PID 1824 wrote to memory of 416	1824	svchost.exe	3
PID 1824 wrote to memory of 416	1824	svchost.exe	3
PID 1824 wrote to memory of 416	1824	svchost.exe	3
PID 1824 wrote to memory of 416	1824	svchost.exe	3
PID 1824 wrote to memory of 416	1824	svchost.exe	3
PID 1824 wrote to memory of 460	1824	svchost.exe	2
PID 1824 wrote to memory of 460	1824	svchost.exe	2
PID 1824 wrote to memory of 460	1824	svchost.exe	2
PID 1824 wrote to memory of 460	1824	svchost.exe	2

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 netsvcs
  2⤵
  PID:864
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:1008
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:324
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1848
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:600
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1232
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:296
- 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:796
- 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:664
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:584

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:1360
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\be23ba1629b95f90538753d5eca01909431fe880d1f8fca627ab036ca8dd02f0.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:784
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\be23ba1629b95f90538753d5eca01909431fe880d1f8fca627ab036ca8dd02f0.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2032
  - - 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:1984
    - - 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:1488
      - 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:2000
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1824

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1312

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/1488-79-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1488-135-0x0000000020020000-0x000000002002B000-memory.dmp

Filesize
44KB

Download
memory/1488-189-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1488-68-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1824-85-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1824-82-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1984-67-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2000-75-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2000-71-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2000-80-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2000-190-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/2032-58-0x0000000000300000-0x000000000035A000-memory.dmp

Filesize
360KB

Download
memory/2032-57-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2032-55-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

Download