af33d2bd738d3b65244fa013e0efcf945a846c037f4be99d47cb70db35c00be2

Analysis

max time kernel
155s
max time network
145s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/10/2022, 04:51

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General

Target

af33d2bd738d3b65244fa013e0efcf945a846c037f4be99d47cb70db35c00be2.dll
Size

709KB
MD5

6890c7c8e3a22b89673e2d323e3be944
SHA1

7b0162c17966a8fe2e78327cf73555647ccd861e
SHA256

af33d2bd738d3b65244fa013e0efcf945a846c037f4be99d47cb70db35c00be2
SHA512

5d3f2d7339e30ff50aa29ded58edf10db91670eddb12d1e265375cf7e547c7cc9900f64bb3cfc20c513ce722048b2d1ccfcaab6ba2ddbc17f121a0fa59622eba
SSDEEP

12288:EE7NiOLg18+1/hv5VEipyz7mTWWa8afR2ftuD1xbmiUaWlodYJA0K:EE3+F5GipwuWWpj+bW6dYJLK

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
916	rundll32mgr.exe
2036	WaterMark.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/916-64-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/916-65-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/916-71-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1656-78-0x0000000074750000-0x0000000074808000-memory.dmp	upx
behavioral1/memory/2036-82-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral1/memory/2036-83-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral1/memory/2036-220-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral1/memory/2036-221-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1656	rundll32.exe
1656	rundll32.exe
916	rundll32mgr.exe
916	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 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\px25E9.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
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\7zG.exe	svchost.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
956	1656	WerFault.exe	28

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
2036	WaterMark.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe
1436	svchost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	WaterMark.exe
Token: SeDebugPrivilege	1436	svchost.exe
Token: SeDebugPrivilege	1656	rundll32.exe
Token: SeDebugPrivilege	956	WerFault.exe
Token: SeDebugPrivilege	2036	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
916	rundll32mgr.exe
2036	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 688 wrote to memory of 1656	688	rundll32.exe	28
PID 1656 wrote to memory of 916	1656	rundll32.exe	29
PID 1656 wrote to memory of 916	1656	rundll32.exe	29
PID 1656 wrote to memory of 916	1656	rundll32.exe	29
PID 1656 wrote to memory of 916	1656	rundll32.exe	29
PID 1656 wrote to memory of 956	1656	rundll32.exe	30
PID 1656 wrote to memory of 956	1656	rundll32.exe	30
PID 1656 wrote to memory of 956	1656	rundll32.exe	30
PID 1656 wrote to memory of 956	1656	rundll32.exe	30
PID 916 wrote to memory of 2036	916	rundll32mgr.exe	31
PID 916 wrote to memory of 2036	916	rundll32mgr.exe	31
PID 916 wrote to memory of 2036	916	rundll32mgr.exe	31
PID 916 wrote to memory of 2036	916	rundll32mgr.exe	31
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 840	2036	WaterMark.exe	32
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 2036 wrote to memory of 1436	2036	WaterMark.exe	33
PID 1436 wrote to memory of 260	1436	svchost.exe	26
PID 1436 wrote to memory of 260	1436	svchost.exe	26
PID 1436 wrote to memory of 260	1436	svchost.exe	26
PID 1436 wrote to memory of 260	1436	svchost.exe	26
PID 1436 wrote to memory of 260	1436	svchost.exe	26
PID 1436 wrote to memory of 336	1436	svchost.exe	25
PID 1436 wrote to memory of 336	1436	svchost.exe	25
PID 1436 wrote to memory of 336	1436	svchost.exe	25
PID 1436 wrote to memory of 336	1436	svchost.exe	25
PID 1436 wrote to memory of 336	1436	svchost.exe	25
PID 1436 wrote to memory of 372	1436	svchost.exe	24
PID 1436 wrote to memory of 372	1436	svchost.exe	24
PID 1436 wrote to memory of 372	1436	svchost.exe	24
PID 1436 wrote to memory of 372	1436	svchost.exe	24
PID 1436 wrote to memory of 372	1436	svchost.exe	24
PID 1436 wrote to memory of 384	1436	svchost.exe	4
PID 1436 wrote to memory of 384	1436	svchost.exe	4
PID 1436 wrote to memory of 384	1436	svchost.exe	4
PID 1436 wrote to memory of 384	1436	svchost.exe	4
PID 1436 wrote to memory of 384	1436	svchost.exe	4
PID 1436 wrote to memory of 420	1436	svchost.exe	3
PID 1436 wrote to memory of 420	1436	svchost.exe	3
PID 1436 wrote to memory of 420	1436	svchost.exe	3
PID 1436 wrote to memory of 420	1436	svchost.exe	3
PID 1436 wrote to memory of 420	1436	svchost.exe	3

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

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:464
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:596
- - C:\Windows\system32\wbem\wmiprvse.exe
    C:\Windows\system32\wbem\wmiprvse.exe
    3⤵
    PID:1944
- 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:1676
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1144
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1056
- 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:284
- 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:844
- 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:756
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:672

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

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:384

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1240

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1636

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1272
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\af33d2bd738d3b65244fa013e0efcf945a846c037f4be99d47cb70db35c00be2.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:688
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\af33d2bd738d3b65244fa013e0efcf945a846c037f4be99d47cb70db35c00be2.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1656
  - - 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:916
    - - 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:2036
      - 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:840
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1436
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 224
      4⤵
      Program crash
      Suspicious use of AdjustPrivilegeToken
      PID:956

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
PID:488

C:\Windows\system32\wininit.exe
wininit.exe
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

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
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

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

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

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

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

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

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

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

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

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

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
123KB

MD5
bfeab24969e80e4fd4362b05f5c54554

SHA1
bc2365f8bc9163e0f327e11541e0462395a879ac

SHA256
cc900fe27a79e792b7b2547191b65dbadb550b02b1b42d072c06d73096185206

SHA512
4c658ed109aa774121820af99c16417c71a2adf0117446ea898ceb2a5e86bd61c0b758023bd0ab33e13c2d91c7c60cb9e5ea26a2d969257c6d26909dbb9da259

Download Submit
memory/840-93-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/840-85-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/840-222-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/840-89-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/916-65-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/916-64-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/916-71-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1436-95-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1436-98-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1656-55-0x0000000074D61000-0x0000000074D63000-memory.dmp

Filesize
8KB

Download
memory/1656-79-0x0000000074690000-0x0000000074748000-memory.dmp

Filesize
736KB

Download
memory/1656-78-0x0000000074750000-0x0000000074808000-memory.dmp

Filesize
736KB

Download
memory/1656-869-0x00000000001B0000-0x00000000001DB000-memory.dmp

Filesize
172KB

Download
memory/1656-868-0x00000000001B0000-0x00000000001DB000-memory.dmp

Filesize
172KB

Download
memory/1656-866-0x0000000074690000-0x0000000074748000-memory.dmp

Filesize
736KB

Download
memory/1656-80-0x00000000001B0000-0x00000000001DB000-memory.dmp

Filesize
172KB

Download
memory/1656-865-0x0000000074750000-0x0000000074808000-memory.dmp

Filesize
736KB

Download
memory/1656-81-0x00000000001B0000-0x00000000001DB000-memory.dmp

Filesize
172KB

Download
memory/2036-221-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2036-220-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2036-82-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2036-83-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download