ramnit | 8ea63de97de9a923e56ae6510184867aa4c9ea3ca85069663ea1254a5df1e55d

Analysis

max time kernel
152s
max time network
133s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04-12-2022 02:06

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General

Target

8ea63de97de9a923e56ae6510184867aa4c9ea3ca85069663ea1254a5df1e55d.dll
Size

156KB
MD5

dc8e7187d0d667665dc3ea2d851ee7c0
SHA1

e6392ee620a70255cfbd52e54b570ef8dabb6e6e
SHA256

8ea63de97de9a923e56ae6510184867aa4c9ea3ca85069663ea1254a5df1e55d
SHA512

8fa62aad8a732f4fbc9ceb230c4ee474a08a4bdb289e9db6b3ab603328c75f062eccf653410c736aa441a49c0d0d24da03449deb8ea32155986f959006117a4e
SSDEEP

3072:An4cV8gf2u41Z5tKlw1vrplnv0M6rUk12VH+Q9bDYJ1it78P:a4y8gOl2Evrrvj/aIH+QlcJgOP

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
604	rundll32mgr.exe
1076	WaterMark.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/604-66-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1076-79-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1076-182-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1516	rundll32.exe
1516	rundll32.exe
604	rundll32mgr.exe
604	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 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 (x86)\Microsoft\px95BB.tmp	rundll32mgr.exe
File opened for modification	C:\Program Files\7-Zip\7-zip.dll	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\7zG.exe	svchost.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

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
1076	WaterMark.exe
1076	WaterMark.exe
1076	WaterMark.exe
1076	WaterMark.exe
1076	WaterMark.exe
1076	WaterMark.exe
1076	WaterMark.exe
1076	WaterMark.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe
1832	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1076	WaterMark.exe
Token: SeDebugPrivilege	1832	svchost.exe
Token: SeDebugPrivilege	1076	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1508 wrote to memory of 1516	1508	rundll32.exe	26
PID 1516 wrote to memory of 604	1516	rundll32.exe	27
PID 1516 wrote to memory of 604	1516	rundll32.exe	27
PID 1516 wrote to memory of 604	1516	rundll32.exe	27
PID 1516 wrote to memory of 604	1516	rundll32.exe	27
PID 604 wrote to memory of 1076	604	rundll32mgr.exe	28
PID 604 wrote to memory of 1076	604	rundll32mgr.exe	28
PID 604 wrote to memory of 1076	604	rundll32mgr.exe	28
PID 604 wrote to memory of 1076	604	rundll32mgr.exe	28
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 768	1076	WaterMark.exe	29
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1076 wrote to memory of 1832	1076	WaterMark.exe	30
PID 1832 wrote to memory of 260	1832	svchost.exe	24
PID 1832 wrote to memory of 260	1832	svchost.exe	24
PID 1832 wrote to memory of 260	1832	svchost.exe	24
PID 1832 wrote to memory of 260	1832	svchost.exe	24
PID 1832 wrote to memory of 260	1832	svchost.exe	24
PID 1832 wrote to memory of 332	1832	svchost.exe	23
PID 1832 wrote to memory of 332	1832	svchost.exe	23
PID 1832 wrote to memory of 332	1832	svchost.exe	23
PID 1832 wrote to memory of 332	1832	svchost.exe	23
PID 1832 wrote to memory of 332	1832	svchost.exe	23
PID 1832 wrote to memory of 368	1832	svchost.exe	22
PID 1832 wrote to memory of 368	1832	svchost.exe	22
PID 1832 wrote to memory of 368	1832	svchost.exe	22
PID 1832 wrote to memory of 368	1832	svchost.exe	22
PID 1832 wrote to memory of 368	1832	svchost.exe	22
PID 1832 wrote to memory of 376	1832	svchost.exe	21
PID 1832 wrote to memory of 376	1832	svchost.exe	21
PID 1832 wrote to memory of 376	1832	svchost.exe	21
PID 1832 wrote to memory of 376	1832	svchost.exe	21
PID 1832 wrote to memory of 376	1832	svchost.exe	21
PID 1832 wrote to memory of 416	1832	svchost.exe	20
PID 1832 wrote to memory of 416	1832	svchost.exe	20
PID 1832 wrote to memory of 416	1832	svchost.exe	20
PID 1832 wrote to memory of 416	1832	svchost.exe	20
PID 1832 wrote to memory of 416	1832	svchost.exe	20
PID 1832 wrote to memory of 464	1832	svchost.exe	2
PID 1832 wrote to memory of 464	1832	svchost.exe	2
PID 1832 wrote to memory of 464	1832	svchost.exe	2
PID 1832 wrote to memory of 464	1832	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 LocalSystemNetworkRestricted
  2⤵
  PID:788
- - C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    3⤵
    PID:1364
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1704
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1932
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1272
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:380
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:992
- 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 netsvcs
  2⤵
  PID:864
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:828
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:728
- 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 DcomLaunch
  2⤵
  PID:576

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1412
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8ea63de97de9a923e56ae6510184867aa4c9ea3ca85069663ea1254a5df1e55d.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1508
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\8ea63de97de9a923e56ae6510184867aa4c9ea3ca85069663ea1254a5df1e55d.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1516
  - - 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 WriteProcessMemory
      PID:604
    - - 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:1076
      - 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:768
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1832

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
PID:480

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\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
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

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

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

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

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

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

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

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

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

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

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
65KB

MD5
a9ea94ee4a3bb43d4057823b2072dc54

SHA1
94ade3c34ec08613daba8a1240586c24f8169794

SHA256
7edbb67a880d90e53ec7949c4907f4ccf5596899b98ed8651b01a485a7b06789

SHA512
0ae24a452c474a0b67eb17ceb78eabc46aad7f04a249d526cbd1bf25ccc94016133ee6cdd1cf342fa3c8dbff60372d18df56137a6c0303bbaee07f005f930ab5

Download Submit
memory/604-66-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/604-68-0x0000000000220000-0x0000000000241000-memory.dmp

Filesize
132KB

Download
memory/604-59-0x0000000000000000-mapping.dmp

Download
memory/768-183-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/768-70-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/768-72-0x0000000000000000-mapping.dmp

Download
memory/768-74-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/768-78-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1076-182-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1076-134-0x0000000020021000-0x0000000020028000-memory.dmp

Filesize
28KB

Download
memory/1076-64-0x0000000000000000-mapping.dmp

Download
memory/1076-79-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1076-135-0x0000000020020000-0x000000002002B000-memory.dmp

Filesize
44KB

Download
memory/1516-55-0x0000000075451000-0x0000000075453000-memory.dmp

Filesize
8KB

Download
memory/1516-54-0x0000000000000000-mapping.dmp

Download
memory/1516-57-0x0000000010000000-0x0000000010028000-memory.dmp

Filesize
160KB

Download
memory/1832-84-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1832-83-0x0000000000000000-mapping.dmp

Download
memory/1832-81-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download