a7ecd5816f5da87f214918e9c389ca55e4259fad0b6c978c5ef0b70c95f0f0e3

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
11-10-2022 00:06

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General

Target

a7ecd5816f5da87f214918e9c389ca55e4259fad0b6c978c5ef0b70c95f0f0e3.dll
Size

212KB
MD5

40f196f57b767669ccd72bb230bf7c30
SHA1

15551a0fc08f834a8bcbe090ecf2aa5f25e0e1b5
SHA256

a7ecd5816f5da87f214918e9c389ca55e4259fad0b6c978c5ef0b70c95f0f0e3
SHA512

eb39cc463d71f1735ff2482141d69e2553d1ed4f3498a34cf5e870fa0ed12095c05a71bfc03cc10c865ed02d8193155d3c8aa9915213a267ae7d206be1f25db1
SSDEEP

3072:En4cV8gf2u41Z5tKlwfSrohytZZ4fGEbCP:24y8gOl2iSrowtZZmK

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
840	rundll32mgr.exe
1464	WaterMark.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/840-64-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/1464-77-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/1464-185-0x0000000000400000-0x0000000000427000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1344	rundll32.exe
1344	rundll32.exe
840	rundll32mgr.exe
840	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\px256C.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\7zFM.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\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\7-zip32.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7z.dll	svchost.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1464	WaterMark.exe
1464	WaterMark.exe
1464	WaterMark.exe
1464	WaterMark.exe
1464	WaterMark.exe
1464	WaterMark.exe
1464	WaterMark.exe
1464	WaterMark.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe
1376	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1464	WaterMark.exe
Token: SeDebugPrivilege	1376	svchost.exe
Token: SeDebugPrivilege	1464	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1204 wrote to memory of 1344	1204	rundll32.exe	27
PID 1344 wrote to memory of 840	1344	rundll32.exe	28
PID 1344 wrote to memory of 840	1344	rundll32.exe	28
PID 1344 wrote to memory of 840	1344	rundll32.exe	28
PID 1344 wrote to memory of 840	1344	rundll32.exe	28
PID 840 wrote to memory of 1464	840	rundll32mgr.exe	29
PID 840 wrote to memory of 1464	840	rundll32mgr.exe	29
PID 840 wrote to memory of 1464	840	rundll32mgr.exe	29
PID 840 wrote to memory of 1464	840	rundll32mgr.exe	29
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1040	1464	WaterMark.exe	30
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1464 wrote to memory of 1376	1464	WaterMark.exe	31
PID 1376 wrote to memory of 260	1376	svchost.exe	26
PID 1376 wrote to memory of 260	1376	svchost.exe	26
PID 1376 wrote to memory of 260	1376	svchost.exe	26
PID 1376 wrote to memory of 260	1376	svchost.exe	26
PID 1376 wrote to memory of 260	1376	svchost.exe	26
PID 1376 wrote to memory of 336	1376	svchost.exe	25
PID 1376 wrote to memory of 336	1376	svchost.exe	25
PID 1376 wrote to memory of 336	1376	svchost.exe	25
PID 1376 wrote to memory of 336	1376	svchost.exe	25
PID 1376 wrote to memory of 336	1376	svchost.exe	25
PID 1376 wrote to memory of 372	1376	svchost.exe	5
PID 1376 wrote to memory of 372	1376	svchost.exe	5
PID 1376 wrote to memory of 372	1376	svchost.exe	5
PID 1376 wrote to memory of 372	1376	svchost.exe	5
PID 1376 wrote to memory of 372	1376	svchost.exe	5
PID 1376 wrote to memory of 384	1376	svchost.exe	4
PID 1376 wrote to memory of 384	1376	svchost.exe	4
PID 1376 wrote to memory of 384	1376	svchost.exe	4
PID 1376 wrote to memory of 384	1376	svchost.exe	4
PID 1376 wrote to memory of 384	1376	svchost.exe	4
PID 1376 wrote to memory of 420	1376	svchost.exe	3
PID 1376 wrote to memory of 420	1376	svchost.exe	3
PID 1376 wrote to memory of 420	1376	svchost.exe	3
PID 1376 wrote to memory of 420	1376	svchost.exe	3
PID 1376 wrote to memory of 420	1376	svchost.exe	3
PID 1376 wrote to memory of 468	1376	svchost.exe	2
PID 1376 wrote to memory of 468	1376	svchost.exe	2
PID 1376 wrote to memory of 468	1376	svchost.exe	2
PID 1376 wrote to memory of 468	1376	svchost.exe	2

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:484

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:468
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:816
- - C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    3⤵
    PID:1232
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:768
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:864
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1152
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1068
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:296
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:324
- - 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:336
- 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:852
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:748
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:680
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:600

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\wininit.exe
wininit.exe
1⤵
PID:372
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:492

\\?\C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T /R
1⤵
PID:1904

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1288
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a7ecd5816f5da87f214918e9c389ca55e4259fad0b6c978c5ef0b70c95f0f0e3.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1204
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\a7ecd5816f5da87f214918e9c389ca55e4259fad0b6c978c5ef0b70c95f0f0e3.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1344
  - - 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 WriteProcessMemory
      PID:840
    - - 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 WriteProcessMemory
        
        PID:1464
      - 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:1040
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1376

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
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

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

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

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

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

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

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

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

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

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

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

Download Submit
\Windows\SysWOW64\rundll32mgr.exe

Filesize
121KB

MD5
4b1a46af16065ad354950f16a337133e

SHA1
68678358e7414fdffd57d4ed072d2bb79e7687ec

SHA256
d61b810f35e920beaf7b74180a0be0f92e0741746f7b99c247c37a577b8d6f7e

SHA512
2edd70fd2eb835f9fafb88e0b7ca84a03dfb6b54c017fac26817b769535e5e55073e26f9964f7847f091f0bc24959836f1dbe586896ac34b3c543870fb0bc88e

Download Submit
memory/840-66-0x0000000000220000-0x0000000000247000-memory.dmp

Filesize
156KB

Download
memory/840-64-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1040-69-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1040-78-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1040-186-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1040-73-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/1344-55-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

Filesize
8KB

Download
memory/1376-80-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1376-83-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1464-77-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1464-135-0x0000000020021000-0x0000000020028000-memory.dmp

Filesize
28KB

Download
memory/1464-136-0x0000000020020000-0x000000002002B000-memory.dmp

Filesize
44KB

Download
memory/1464-185-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download