ramnit | fe7b439fd9a21ead0b57097c2ab4a06bd87d8925df454697c024cddf0e4f2d23

Analysis

max time kernel
170s
max time network
143s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30/10/2022, 02:33

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General

Target

fe7b439fd9a21ead0b57097c2ab4a06bd87d8925df454697c024cddf0e4f2d23.dll
Size

264KB
MD5

92b04fc6fa76ff97db1a2da9ec16720f
SHA1

6f7476cfeca88da252d55566716849b996484cc0
SHA256

fe7b439fd9a21ead0b57097c2ab4a06bd87d8925df454697c024cddf0e4f2d23
SHA512

1819a49f921b6deb58a61cf17e065fa33fce17471a983a1cf96dc1e519a9c22ca65bc9ba1d559484cae8729f3cc087690423b7deafd9dbbfa1e9b36bebf3d724
SSDEEP

3072:7Zmu9K33WSwdJ/tILtAPrL+oxdvnjD4NnBwGyn0I9NuSKqer9/UWp6j7d:78b33QqUrS0IB49gSKbZp69

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
896	rundll32mgr.exe
1136	WaterMark.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/896-64-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/896-63-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/896-71-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1136-85-0x0000000000400000-0x0000000000428000-memory.dmp	upx
behavioral1/memory/1136-87-0x0000000000400000-0x0000000000428000-memory.dmp	upx
behavioral1/memory/1136-194-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
844	rundll32.exe
844	rundll32.exe
896	rundll32mgr.exe
896	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 created	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 (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 opened for modification	C:\Program Files\7-Zip\7zFM.exe	svchost.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px5C06.tmp	rundll32mgr.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32mgr.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1136	WaterMark.exe
1136	WaterMark.exe
1136	WaterMark.exe
1136	WaterMark.exe
1136	WaterMark.exe
1136	WaterMark.exe
1136	WaterMark.exe
1136	WaterMark.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe
1476	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1136	WaterMark.exe
Token: SeDebugPrivilege	1476	svchost.exe
Token: SeDebugPrivilege	1136	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
896	rundll32mgr.exe
1136	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 1228 wrote to memory of 844	1228	rundll32.exe	27
PID 844 wrote to memory of 896	844	rundll32.exe	28
PID 844 wrote to memory of 896	844	rundll32.exe	28
PID 844 wrote to memory of 896	844	rundll32.exe	28
PID 844 wrote to memory of 896	844	rundll32.exe	28
PID 896 wrote to memory of 1136	896	rundll32mgr.exe	29
PID 896 wrote to memory of 1136	896	rundll32mgr.exe	29
PID 896 wrote to memory of 1136	896	rundll32mgr.exe	29
PID 896 wrote to memory of 1136	896	rundll32mgr.exe	29
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1920	1136	WaterMark.exe	30
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1136 wrote to memory of 1476	1136	WaterMark.exe	31
PID 1476 wrote to memory of 260	1476	svchost.exe	7
PID 1476 wrote to memory of 260	1476	svchost.exe	7
PID 1476 wrote to memory of 260	1476	svchost.exe	7
PID 1476 wrote to memory of 260	1476	svchost.exe	7
PID 1476 wrote to memory of 260	1476	svchost.exe	7
PID 1476 wrote to memory of 336	1476	svchost.exe	6
PID 1476 wrote to memory of 336	1476	svchost.exe	6
PID 1476 wrote to memory of 336	1476	svchost.exe	6
PID 1476 wrote to memory of 336	1476	svchost.exe	6
PID 1476 wrote to memory of 336	1476	svchost.exe	6
PID 1476 wrote to memory of 372	1476	svchost.exe	5
PID 1476 wrote to memory of 372	1476	svchost.exe	5
PID 1476 wrote to memory of 372	1476	svchost.exe	5
PID 1476 wrote to memory of 372	1476	svchost.exe	5
PID 1476 wrote to memory of 372	1476	svchost.exe	5
PID 1476 wrote to memory of 380	1476	svchost.exe	4
PID 1476 wrote to memory of 380	1476	svchost.exe	4
PID 1476 wrote to memory of 380	1476	svchost.exe	4
PID 1476 wrote to memory of 380	1476	svchost.exe	4
PID 1476 wrote to memory of 380	1476	svchost.exe	4
PID 1476 wrote to memory of 420	1476	svchost.exe	3
PID 1476 wrote to memory of 420	1476	svchost.exe	3
PID 1476 wrote to memory of 420	1476	svchost.exe	3
PID 1476 wrote to memory of 420	1476	svchost.exe	3
PID 1476 wrote to memory of 420	1476	svchost.exe	3
PID 1476 wrote to memory of 468	1476	svchost.exe	2
PID 1476 wrote to memory of 468	1476	svchost.exe	2
PID 1476 wrote to memory of 468	1476	svchost.exe	2
PID 1476 wrote to memory of 468	1476	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:468
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:800
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:960
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1256
- 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:308
- 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:876
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:852
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:804
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:740
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:676
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:592

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

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:380
- 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:372

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:336

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:1928

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1384
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fe7b439fd9a21ead0b57097c2ab4a06bd87d8925df454697c024cddf0e4f2d23.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1228
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\fe7b439fd9a21ead0b57097c2ab4a06bd87d8925df454697c024cddf0e4f2d23.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:844
  - - 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:896
    - - 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:1136
      - 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:1920
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1476

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1340

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
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

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

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

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

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

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

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

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

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

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

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
119KB

MD5
b313c611c4280feba76564194b05c1eb

SHA1
16d9cbab9fb369ddcd6f6e33cdaf977fe3d34c8c

SHA256
bd7b3cb1c8d032fe5dddbe74ce0cba8df770b7545e550f6bf216ab2cdd4ff87f

SHA512
691d9d8f27e83df242216087362f45d35e7387ec56169bd9af5b9309838be70c5c042fe6bc9c0152db870696df0a0e4f369950dd9d18c65403c72d8293f74f0b

Download Submit
memory/844-55-0x0000000076401000-0x0000000076403000-memory.dmp

Filesize
8KB

Download
memory/844-60-0x0000000000690000-0x00000000006B8000-memory.dmp

Filesize
160KB

Download
memory/896-71-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/896-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/896-64-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1136-87-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1136-85-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1136-194-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1476-89-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1476-92-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1920-77-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1920-81-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1920-86-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1920-195-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download