ramnit | 48999a898a10b4cd18d5214645a1237b5ad68cf10f20f843e98d14e0e178a149

Analysis

max time kernel
188s
max time network
150s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 02:23

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General

Target

48999a898a10b4cd18d5214645a1237b5ad68cf10f20f843e98d14e0e178a149.dll
Size

677KB
MD5

a0073f70dc28ae4bacd6ebae831efaf0
SHA1

ec809cba09e157b3902344cb5bf251fec18d1482
SHA256

48999a898a10b4cd18d5214645a1237b5ad68cf10f20f843e98d14e0e178a149
SHA512

0a89df10c6f4c2f09f0c5210deefe8991437e327c6ec04943a7bb9aa0994d13c1fbd2989e646a783c5734527805535665e913aa1287f9ae096408ff351b21ced
SSDEEP

12288:sNIyZN4+Wv4PLq6Okrh9ZN/hs9DsdseTTPvEK:s9TPmirh9Zdh6LeTTnEK

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
2028	rundll32mgr.exe
1180	WaterMark.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2028-63-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/2028-62-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/2028-70-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1180-89-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1180-88-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral1/memory/1180-217-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
652	rundll32.exe
652	rundll32.exe
2028	rundll32mgr.exe
2028	rundll32mgr.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32mgr.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 9 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\pxAA83.tmp	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
File opened for modification	C:\Program Files\7-Zip\7z.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7z.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
File opened for modification	C:\Program Files\7-Zip\7-zip.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	svchost.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2036	652	WerFault.exe	28

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1180	WaterMark.exe
1180	WaterMark.exe
1180	WaterMark.exe
1180	WaterMark.exe
1180	WaterMark.exe
1180	WaterMark.exe
1180	WaterMark.exe
1180	WaterMark.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe
756	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2036	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1180	WaterMark.exe
Token: SeDebugPrivilege	756	svchost.exe
Token: SeDebugPrivilege	652	rundll32.exe
Token: SeDebugPrivilege	2036	WerFault.exe
Token: SeDebugPrivilege	1180	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2028	rundll32mgr.exe
1180	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 268 wrote to memory of 652	268	rundll32.exe	28
PID 652 wrote to memory of 2028	652	rundll32.exe	29
PID 652 wrote to memory of 2028	652	rundll32.exe	29
PID 652 wrote to memory of 2028	652	rundll32.exe	29
PID 652 wrote to memory of 2028	652	rundll32.exe	29
PID 652 wrote to memory of 2036	652	rundll32.exe	30
PID 652 wrote to memory of 2036	652	rundll32.exe	30
PID 652 wrote to memory of 2036	652	rundll32.exe	30
PID 652 wrote to memory of 2036	652	rundll32.exe	30
PID 2028 wrote to memory of 1180	2028	rundll32mgr.exe	31
PID 2028 wrote to memory of 1180	2028	rundll32mgr.exe	31
PID 2028 wrote to memory of 1180	2028	rundll32mgr.exe	31
PID 2028 wrote to memory of 1180	2028	rundll32mgr.exe	31
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 364	1180	WaterMark.exe	32
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 1180 wrote to memory of 756	1180	WaterMark.exe	33
PID 756 wrote to memory of 260	756	svchost.exe	27
PID 756 wrote to memory of 260	756	svchost.exe	27
PID 756 wrote to memory of 260	756	svchost.exe	27
PID 756 wrote to memory of 260	756	svchost.exe	27
PID 756 wrote to memory of 260	756	svchost.exe	27
PID 756 wrote to memory of 332	756	svchost.exe	26
PID 756 wrote to memory of 332	756	svchost.exe	26
PID 756 wrote to memory of 332	756	svchost.exe	26
PID 756 wrote to memory of 332	756	svchost.exe	26
PID 756 wrote to memory of 332	756	svchost.exe	26
PID 756 wrote to memory of 368	756	svchost.exe	25
PID 756 wrote to memory of 368	756	svchost.exe	25
PID 756 wrote to memory of 368	756	svchost.exe	25
PID 756 wrote to memory of 368	756	svchost.exe	25
PID 756 wrote to memory of 368	756	svchost.exe	25
PID 756 wrote to memory of 380	756	svchost.exe	24
PID 756 wrote to memory of 380	756	svchost.exe	24
PID 756 wrote to memory of 380	756	svchost.exe	24
PID 756 wrote to memory of 380	756	svchost.exe	24
PID 756 wrote to memory of 380	756	svchost.exe	24
PID 756 wrote to memory of 416	756	svchost.exe	3
PID 756 wrote to memory of 416	756	svchost.exe	3
PID 756 wrote to memory of 416	756	svchost.exe	3
PID 756 wrote to memory of 416	756	svchost.exe	3
PID 756 wrote to memory of 416	756	svchost.exe	3

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 LocalServiceNetworkRestricted
  2⤵
  PID:740
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1628
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1084
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1128
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1040
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:324
- - C:\Windows\system32\wininit.exe
    wininit.exe
    3⤵
    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
    3⤵
    PID:332
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:280
- 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 LocalSystemNetworkRestricted
  2⤵
  PID:796
- 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:580

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:416

C:\Windows\system32\wbem\wmiprvse.exe
C:\Windows\system32\wbem\wmiprvse.exe
1⤵
PID:1724

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1940

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1284
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\48999a898a10b4cd18d5214645a1237b5ad68cf10f20f843e98d14e0e178a149.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\48999a898a10b4cd18d5214645a1237b5ad68cf10f20f843e98d14e0e178a149.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:652
  - - 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:2028
    - - 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:1180
      - 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:364
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:756
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 652 -s 228
      4⤵
      Program crash
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:2036

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1228

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
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:380

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
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

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

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

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

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

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

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

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

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

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

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
92KB

MD5
6573e42f114e86e6e8a4ecb862d0bb96

SHA1
49f06fe5173a22923ce99807e74730772e51b558

SHA256
b8e4c7de78d23aa6636384fdd922f7e37b7a20b30cc25f1e1b75a3bebfa20648

SHA512
41439ff2d92861651d3f51352daf2594242661d40300e4730815ba52a07240b188f2ea710cd1f15631e90e9d8f33d44014b49d4c59b091c3ea3970ce8f5d1394

Download Submit
memory/364-90-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/364-81-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/364-77-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/364-218-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/652-87-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/652-905-0x0000000010000000-0x00000000100AF000-memory.dmp

Filesize
700KB

Download
memory/652-55-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

Filesize
8KB

Download
memory/652-85-0x0000000010000000-0x00000000100AF000-memory.dmp

Filesize
700KB

Download
memory/652-86-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/756-92-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/756-95-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1180-89-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1180-88-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1180-217-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2028-70-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2028-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2028-62-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download