4ea0ce5010953b6802f03530990562806d9143d4e46aa94181f7f554cd02dd21

Analysis

max time kernel
152s
max time network
132s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
21/10/2022, 00:18

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General

Target

4ea0ce5010953b6802f03530990562806d9143d4e46aa94181f7f554cd02dd21.dll
Size

264KB
MD5

4d4d0ff5d86174ef08639d48442ae11f
SHA1

6c882b7a83baa0bcc0aeeabe3fe132d09ea56cd2
SHA256

4ea0ce5010953b6802f03530990562806d9143d4e46aa94181f7f554cd02dd21
SHA512

b10ba607958df890984246e3976317c74bd6f98dc993a18c66618ab4211925afda9ef3115d3aaf9c53b0bcf54d74bec7d413ddf339ace9b33399e2e890f467b9
SSDEEP

3072:KZmu9K33WSwdJ/tILtAPrL+oxdvTjD4NRSxEdlIkFmTkQV1FXRCSGufV0mlstx:K8b33QqUrSAo26c/1FCu90ms

Score

10^/10

persistence upx

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

Executes dropped EXE 2 IoCs

pid	Process
1712	rundll32mgr.exe
1076	WaterMark.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1712-63-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1712-62-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1712-69-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1076-86-0x0000000000400000-0x0000000000428000-memory.dmp	upx
behavioral1/memory/1076-84-0x0000000000400000-0x0000000000428000-memory.dmp	upx
behavioral1/memory/1076-197-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
668	rundll32.exe
668	rundll32.exe
1712	rundll32mgr.exe
1712	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 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\pxC22.tmp	rundll32mgr.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 (x86)\Microsoft\WaterMark.exe	svchost.exe

Suspicious behavior: EnumeratesProcesses 25 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
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe
652	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1076	WaterMark.exe
Token: SeDebugPrivilege	652	svchost.exe
Token: SeDebugPrivilege	1076	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1712	rundll32mgr.exe
1076	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 1952 wrote to memory of 668	1952	rundll32.exe	28
PID 668 wrote to memory of 1712	668	rundll32.exe	29
PID 668 wrote to memory of 1712	668	rundll32.exe	29
PID 668 wrote to memory of 1712	668	rundll32.exe	29
PID 668 wrote to memory of 1712	668	rundll32.exe	29
PID 1712 wrote to memory of 1076	1712	rundll32mgr.exe	30
PID 1712 wrote to memory of 1076	1712	rundll32mgr.exe	30
PID 1712 wrote to memory of 1076	1712	rundll32mgr.exe	30
PID 1712 wrote to memory of 1076	1712	rundll32mgr.exe	30
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 2040	1076	WaterMark.exe	31
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 1076 wrote to memory of 652	1076	WaterMark.exe	32
PID 652 wrote to memory of 260	652	svchost.exe	6
PID 652 wrote to memory of 260	652	svchost.exe	6
PID 652 wrote to memory of 260	652	svchost.exe	6
PID 652 wrote to memory of 260	652	svchost.exe	6
PID 652 wrote to memory of 260	652	svchost.exe	6
PID 652 wrote to memory of 332	652	svchost.exe	5
PID 652 wrote to memory of 332	652	svchost.exe	5
PID 652 wrote to memory of 332	652	svchost.exe	5
PID 652 wrote to memory of 332	652	svchost.exe	5
PID 652 wrote to memory of 332	652	svchost.exe	5
PID 652 wrote to memory of 368	652	svchost.exe	4
PID 652 wrote to memory of 368	652	svchost.exe	4
PID 652 wrote to memory of 368	652	svchost.exe	4
PID 652 wrote to memory of 368	652	svchost.exe	4
PID 652 wrote to memory of 368	652	svchost.exe	4
PID 652 wrote to memory of 380	652	svchost.exe	3
PID 652 wrote to memory of 380	652	svchost.exe	3
PID 652 wrote to memory of 380	652	svchost.exe	3
PID 652 wrote to memory of 380	652	svchost.exe	3
PID 652 wrote to memory of 380	652	svchost.exe	3
PID 652 wrote to memory of 416	652	svchost.exe	2
PID 652 wrote to memory of 416	652	svchost.exe	2
PID 652 wrote to memory of 416	652	svchost.exe	2
PID 652 wrote to memory of 416	652	svchost.exe	2
PID 652 wrote to memory of 416	652	svchost.exe	2
PID 652 wrote to memory of 460	652	svchost.exe	1
PID 652 wrote to memory of 460	652	svchost.exe	1
PID 652 wrote to memory of 460	652	svchost.exe	1
PID 652 wrote to memory of 460	652	svchost.exe	1

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:460
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:952
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:964
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1192
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1036
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:360
- 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:860
- 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:788
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:720
- 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\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\lsass.exe
  C:\Windows\system32\lsass.exe
  2⤵
  PID:476
- 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\system32\wbem\wmiprvse.exe
C:\Windows\system32\wbem\wmiprvse.exe
1⤵
PID:1912

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1956

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4ea0ce5010953b6802f03530990562806d9143d4e46aa94181f7f554cd02dd21.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4ea0ce5010953b6802f03530990562806d9143d4e46aa94181f7f554cd02dd21.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:668
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - Suspicious use of UnmapMainImage
    - Suspicious use of WriteProcessMemory
    PID:1712
  - - C:\Program Files (x86)\Microsoft\WaterMark.exe
      "C:\Program Files (x86)\Microsoft\WaterMark.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of UnmapMainImage
      Suspicious use of WriteProcessMemory
      PID:1076
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        5⤵
        Modifies WinLogon for persistence
        Drops file in System32 directory
        Drops file in Program Files directory
        
        PID:2040
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:652

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1324

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1272

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/652-91-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/652-88-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/668-55-0x0000000075981000-0x0000000075983000-memory.dmp

Filesize
8KB

Download
memory/1076-86-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1076-197-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1076-84-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1712-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1712-69-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1712-62-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2040-85-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/2040-80-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/2040-76-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/2040-198-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download