f7102b3dbb3fb16d64276e9a683b0706e2f99bd73a0fb4425f26e239fa356882

Analysis

max time kernel
151s
max time network
145s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
11/10/2022, 22:34

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General

Target

f7102b3dbb3fb16d64276e9a683b0706e2f99bd73a0fb4425f26e239fa356882.dll
Size

140KB
MD5

77100d20e1f863b2e51be49fc54ac82c
SHA1

6b408efb7f144e9bb291441bab764c748de49af7
SHA256

f7102b3dbb3fb16d64276e9a683b0706e2f99bd73a0fb4425f26e239fa356882
SHA512

16abd9b490ff97068ea3934e705fccbafad13c8d747913ea364ad348196da3a243fbc158f2397abf1b32682432c7ef202365866e1c7ac8861d95dba2d9c2d002
SSDEEP

3072:nD09MaWLOdfPQdYeW2Nh/7HFgbIleiuYod:RaqOdHQ5PtlHun

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
1968	rundll32Srv.exe
1596	WaterMark.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000005c50-56.dat	upx
behavioral1/memory/1056-58-0x00000000001F0000-0x000000000023F000-memory.dmp	upx
behavioral1/files/0x0007000000005c50-59.dat	upx
behavioral1/files/0x0007000000005c50-61.dat	upx
behavioral1/files/0x0007000000005c50-63.dat	upx
behavioral1/files/0x000b0000000122c4-64.dat	upx
behavioral1/files/0x000b0000000122c4-65.dat	upx
behavioral1/files/0x000b0000000122c4-67.dat	upx
behavioral1/memory/1968-68-0x0000000000400000-0x000000000044F000-memory.dmp	upx
behavioral1/memory/1596-70-0x0000000000400000-0x000000000044F000-memory.dmp	upx
behavioral1/files/0x000b0000000122c4-71.dat	upx
behavioral1/memory/1596-81-0x0000000000400000-0x000000000044F000-memory.dmp	upx
behavioral1/memory/1596-207-0x0000000000400000-0x000000000044F000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1056	rundll32.exe
1056	rundll32.exe
1968	rundll32Srv.exe
1968	rundll32Srv.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32Srv.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\px4CE9.tmp	rundll32Srv.exe
File created	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32Srv.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	rundll32Srv.exe
File opened for modification	C:\Program Files\7-Zip\7-zip.dll	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7z.exe	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\7zFM.exe	svchost.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	svchost.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2024	1056	WerFault.exe	26

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1596	WaterMark.exe
1596	WaterMark.exe
1596	WaterMark.exe
1596	WaterMark.exe
1596	WaterMark.exe
1596	WaterMark.exe
1596	WaterMark.exe
1596	WaterMark.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe
824	svchost.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1596	WaterMark.exe
Token: SeDebugPrivilege	824	svchost.exe
Token: SeDebugPrivilege	1056	rundll32.exe
Token: SeDebugPrivilege	2024	WerFault.exe
Token: SeDebugPrivilege	1596	WaterMark.exe
Token: SeDebugPrivilege	996	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1088 wrote to memory of 1056	1088	rundll32.exe	26
PID 1056 wrote to memory of 1968	1056	rundll32.exe	27
PID 1056 wrote to memory of 1968	1056	rundll32.exe	27
PID 1056 wrote to memory of 1968	1056	rundll32.exe	27
PID 1056 wrote to memory of 1968	1056	rundll32.exe	27
PID 1056 wrote to memory of 2024	1056	rundll32.exe	28
PID 1056 wrote to memory of 2024	1056	rundll32.exe	28
PID 1056 wrote to memory of 2024	1056	rundll32.exe	28
PID 1056 wrote to memory of 2024	1056	rundll32.exe	28
PID 1968 wrote to memory of 1596	1968	rundll32Srv.exe	29
PID 1968 wrote to memory of 1596	1968	rundll32Srv.exe	29
PID 1968 wrote to memory of 1596	1968	rundll32Srv.exe	29
PID 1968 wrote to memory of 1596	1968	rundll32Srv.exe	29
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 996	1596	WaterMark.exe	30
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 1596 wrote to memory of 824	1596	WaterMark.exe	31
PID 824 wrote to memory of 260	824	svchost.exe	7
PID 824 wrote to memory of 260	824	svchost.exe	7
PID 824 wrote to memory of 260	824	svchost.exe	7
PID 824 wrote to memory of 260	824	svchost.exe	7
PID 824 wrote to memory of 260	824	svchost.exe	7
PID 824 wrote to memory of 332	824	svchost.exe	6
PID 824 wrote to memory of 332	824	svchost.exe	6
PID 824 wrote to memory of 332	824	svchost.exe	6
PID 824 wrote to memory of 332	824	svchost.exe	6
PID 824 wrote to memory of 332	824	svchost.exe	6
PID 824 wrote to memory of 368	824	svchost.exe	5
PID 824 wrote to memory of 368	824	svchost.exe	5
PID 824 wrote to memory of 368	824	svchost.exe	5
PID 824 wrote to memory of 368	824	svchost.exe	5
PID 824 wrote to memory of 368	824	svchost.exe	5
PID 824 wrote to memory of 376	824	svchost.exe	4
PID 824 wrote to memory of 376	824	svchost.exe	4
PID 824 wrote to memory of 376	824	svchost.exe	4
PID 824 wrote to memory of 376	824	svchost.exe	4
PID 824 wrote to memory of 376	824	svchost.exe	4
PID 824 wrote to memory of 416	824	svchost.exe	3
PID 824 wrote to memory of 416	824	svchost.exe	3
PID 824 wrote to memory of 416	824	svchost.exe	3
PID 824 wrote to memory of 416	824	svchost.exe	3
PID 824 wrote to memory of 416	824	svchost.exe	3

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:472

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:588
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:340
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1028
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1848
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1660
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1264
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:284
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:880
- 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:804
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:744
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:668

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:376

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:368
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:480

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\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1348

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1416
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f7102b3dbb3fb16d64276e9a683b0706e2f99bd73a0fb4425f26e239fa356882.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1088
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\f7102b3dbb3fb16d64276e9a683b0706e2f99bd73a0fb4425f26e239fa356882.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1056
  - - C:\Windows\SysWOW64\rundll32Srv.exe
      C:\Windows\SysWOW64\rundll32Srv.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Program Files directory
      Suspicious use of WriteProcessMemory
      PID:1968
    - - 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:1596
      - 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
        Suspicious use of AdjustPrivilegeToken
        
        PID:996
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:824
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1056 -s 228
      4⤵
      Program crash
      Suspicious use of AdjustPrivilegeToken
      PID:2024

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
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

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

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

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

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

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

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

Download Submit
memory/824-87-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/824-84-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/996-77-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/996-73-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/996-82-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/996-210-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1056-58-0x00000000001F0000-0x000000000023F000-memory.dmp

Filesize
316KB

Download
memory/1056-57-0x000000006D240000-0x000000006D263000-memory.dmp

Filesize
140KB

Download
memory/1056-139-0x0000000020020000-0x000000002002B000-memory.dmp

Filesize
44KB

Download
memory/1056-69-0x00000000001F0000-0x000000000023F000-memory.dmp

Filesize
316KB

Download
memory/1056-208-0x000000006D240000-0x000000006D263000-memory.dmp

Filesize
140KB

Download
memory/1056-55-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/1056-209-0x00000000001F0000-0x000000000023F000-memory.dmp

Filesize
316KB

Download
memory/1596-81-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1596-70-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1596-207-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1968-68-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download