ramnit | 76870fd9910067e9938152dd5071d70346466f62228f0458122f55918dbe0726

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
07/11/2022, 17:07

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General

Target

76870fd9910067e9938152dd5071d70346466f62228f0458122f55918dbe0726.dll
Size

216KB
MD5

0e35d3cef9a0eb713973219c47e64ac1
SHA1

1c88f8a4513420659d3df10db6eb0369235f8ce3
SHA256

76870fd9910067e9938152dd5071d70346466f62228f0458122f55918dbe0726
SHA512

c8c124645563ad1c641b8a0808bce5c2ab55773ccc5e30e81aa20f2d6e6db5a7bd2f385ab16d043a6ad92807bafd841b369e7f0644a6d0638b7131622b556296
SSDEEP

3072:un4cV8gf2u41Z5tKlwF+yooPdW3WGaJxK:84y8gOl2aq3dqs

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
1624	rundll32mgr.exe
584	WaterMark.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1624-63-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1624-64-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1624-70-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/584-86-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/584-87-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral1/memory/584-195-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1516	rundll32.exe
1516	rundll32.exe
1624	rundll32mgr.exe
1624	rundll32mgr.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\rundll32mgr.exe	rundll32.exe

Drops file in Program Files directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\7-Zip\7z.dll	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px1AE1.tmp	rundll32mgr.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32mgr.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\7zFM.exe	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	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7-zip32.dll	svchost.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
584	WaterMark.exe
584	WaterMark.exe
584	WaterMark.exe
584	WaterMark.exe
584	WaterMark.exe
584	WaterMark.exe
584	WaterMark.exe
584	WaterMark.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe
872	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	584	WaterMark.exe
Token: SeDebugPrivilege	872	svchost.exe
Token: SeDebugPrivilege	584	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1624	rundll32mgr.exe
584	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1708 wrote to memory of 1516	1708	rundll32.exe	27
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1516 wrote to memory of 1624	1516	rundll32.exe	28
PID 1624 wrote to memory of 584	1624	rundll32mgr.exe	29
PID 1624 wrote to memory of 584	1624	rundll32mgr.exe	29
PID 1624 wrote to memory of 584	1624	rundll32mgr.exe	29
PID 1624 wrote to memory of 584	1624	rundll32mgr.exe	29
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 1820	584	WaterMark.exe	30
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 584 wrote to memory of 872	584	WaterMark.exe	31
PID 872 wrote to memory of 260	872	svchost.exe	7
PID 872 wrote to memory of 260	872	svchost.exe	7
PID 872 wrote to memory of 260	872	svchost.exe	7
PID 872 wrote to memory of 260	872	svchost.exe	7
PID 872 wrote to memory of 260	872	svchost.exe	7
PID 872 wrote to memory of 332	872	svchost.exe	6
PID 872 wrote to memory of 332	872	svchost.exe	6
PID 872 wrote to memory of 332	872	svchost.exe	6
PID 872 wrote to memory of 332	872	svchost.exe	6
PID 872 wrote to memory of 332	872	svchost.exe	6
PID 872 wrote to memory of 368	872	svchost.exe	5
PID 872 wrote to memory of 368	872	svchost.exe	5
PID 872 wrote to memory of 368	872	svchost.exe	5
PID 872 wrote to memory of 368	872	svchost.exe	5
PID 872 wrote to memory of 368	872	svchost.exe	5
PID 872 wrote to memory of 380	872	svchost.exe	4
PID 872 wrote to memory of 380	872	svchost.exe	4
PID 872 wrote to memory of 380	872	svchost.exe	4
PID 872 wrote to memory of 380	872	svchost.exe	4
PID 872 wrote to memory of 380	872	svchost.exe	4
PID 872 wrote to memory of 416	872	svchost.exe	3
PID 872 wrote to memory of 416	872	svchost.exe	3
PID 872 wrote to memory of 416	872	svchost.exe	3
PID 872 wrote to memory of 416	872	svchost.exe	3
PID 872 wrote to memory of 416	872	svchost.exe	3
PID 872 wrote to memory of 464	872	svchost.exe	2
PID 872 wrote to memory of 464	872	svchost.exe	2
PID 872 wrote to memory of 464	872	svchost.exe	2
PID 872 wrote to memory of 464	872	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 LocalServiceNoNetwork
  2⤵
  PID:1080
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1756
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1640
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1116
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:932
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:328
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:884
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:844
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:808
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:756
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:672
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:592

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\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1132

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1236
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\76870fd9910067e9938152dd5071d70346466f62228f0458122f55918dbe0726.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\76870fd9910067e9938152dd5071d70346466f62228f0458122f55918dbe0726.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 UnmapMainImage
      Suspicious use of WriteProcessMemory
      PID:1624
    - - 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:584
      - 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:1820
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:872

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1180

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
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

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

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

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

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

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

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

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

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

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

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
123KB

MD5
41cdf1d40aff3f71114ea210307b6a1c

SHA1
8d5237ed7a29003af5b857edd85f7f54a91f600c

SHA256
00ba79fa51af9b735ebbded72313232d83956c922e206362f9b71411772162b7

SHA512
fdcba01191a345416f17fb4024255f97af135824f1ce57bb8456d74fbfd0e37f89500aeb92c19c4add62e6cb416c57cd06b2aee310fabb91e468852ca062ff0e

Download Submit
memory/584-87-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/584-195-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/584-86-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/872-93-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/872-90-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1516-55-0x0000000075111000-0x0000000075113000-memory.dmp

Filesize
8KB

Download
memory/1624-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1624-70-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1624-64-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1820-82-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1820-88-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1820-78-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1820-196-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download