ramnit | 7688f4f49dbbae8587b13c38a200ddd24ed6d7bf94c0165de32ef53ff9d4248f

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 02:12

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General

Target

7688f4f49dbbae8587b13c38a200ddd24ed6d7bf94c0165de32ef53ff9d4248f.dll
Size

456KB
MD5

eabcbe44552f06b0dd0a4514a9b68ba0
SHA1

13ed72f80bc74f379dff4b69be1ecf4c9b265253
SHA256

7688f4f49dbbae8587b13c38a200ddd24ed6d7bf94c0165de32ef53ff9d4248f
SHA512

f6fe5aa3bde9807c030d7309662712fc3bc61363f962f5395ead97dece662f3066e53aa1010c403547f49f62b5f8f7fa8ad4c6b779ebfcfac00d17986b494b27
SSDEEP

12288:EehnaNPpSVZmNxRCwnwm3W3OHIIf53VdH/w:Eeh0PpS6NxNnwYeOHX3d4

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
940	rundll32Srv.exe
824	WaterMark.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000005c50-56.dat	upx
behavioral1/files/0x0007000000005c50-57.dat	upx
behavioral1/files/0x0007000000005c50-59.dat	upx
behavioral1/memory/940-64-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/files/0x0007000000005c50-65.dat	upx
behavioral1/files/0x000b000000012353-66.dat	upx
behavioral1/files/0x000b000000012353-67.dat	upx
behavioral1/files/0x000b000000012353-69.dat	upx
behavioral1/memory/940-70-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/files/0x000b000000012353-71.dat	upx
behavioral1/memory/824-81-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/824-211-0x0000000000400000-0x0000000000454000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
1364	rundll32.exe
1364	rundll32.exe
940	rundll32Srv.exe
940	rundll32Srv.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\dmlconf.dat	svchost.exe
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe
File created	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\px4599.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\7zFM.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\7z.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
948	1364	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
824	WaterMark.exe
824	WaterMark.exe
824	WaterMark.exe
824	WaterMark.exe
824	WaterMark.exe
824	WaterMark.exe
824	WaterMark.exe
824	WaterMark.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe
1796	svchost.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	824	WaterMark.exe
Token: SeDebugPrivilege	1796	svchost.exe
Token: SeDebugPrivilege	1364	rundll32.exe
Token: SeDebugPrivilege	948	WerFault.exe
Token: SeDebugPrivilege	824	WaterMark.exe
Token: SeDebugPrivilege	1048	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 904 wrote to memory of 1364	904	rundll32.exe	27
PID 1364 wrote to memory of 940	1364	rundll32.exe	28
PID 1364 wrote to memory of 940	1364	rundll32.exe	28
PID 1364 wrote to memory of 940	1364	rundll32.exe	28
PID 1364 wrote to memory of 940	1364	rundll32.exe	28
PID 1364 wrote to memory of 948	1364	rundll32.exe	29
PID 1364 wrote to memory of 948	1364	rundll32.exe	29
PID 1364 wrote to memory of 948	1364	rundll32.exe	29
PID 1364 wrote to memory of 948	1364	rundll32.exe	29
PID 940 wrote to memory of 824	940	rundll32Srv.exe	30
PID 940 wrote to memory of 824	940	rundll32Srv.exe	30
PID 940 wrote to memory of 824	940	rundll32Srv.exe	30
PID 940 wrote to memory of 824	940	rundll32Srv.exe	30
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1048	824	WaterMark.exe	31
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 824 wrote to memory of 1796	824	WaterMark.exe	32
PID 1796 wrote to memory of 260	1796	svchost.exe	22
PID 1796 wrote to memory of 260	1796	svchost.exe	22
PID 1796 wrote to memory of 260	1796	svchost.exe	22
PID 1796 wrote to memory of 260	1796	svchost.exe	22
PID 1796 wrote to memory of 260	1796	svchost.exe	22
PID 1796 wrote to memory of 332	1796	svchost.exe	21
PID 1796 wrote to memory of 332	1796	svchost.exe	21
PID 1796 wrote to memory of 332	1796	svchost.exe	21
PID 1796 wrote to memory of 332	1796	svchost.exe	21
PID 1796 wrote to memory of 332	1796	svchost.exe	21
PID 1796 wrote to memory of 368	1796	svchost.exe	20
PID 1796 wrote to memory of 368	1796	svchost.exe	20
PID 1796 wrote to memory of 368	1796	svchost.exe	20
PID 1796 wrote to memory of 368	1796	svchost.exe	20
PID 1796 wrote to memory of 368	1796	svchost.exe	20
PID 1796 wrote to memory of 380	1796	svchost.exe	19
PID 1796 wrote to memory of 380	1796	svchost.exe	19
PID 1796 wrote to memory of 380	1796	svchost.exe	19
PID 1796 wrote to memory of 380	1796	svchost.exe	19
PID 1796 wrote to memory of 380	1796	svchost.exe	19
PID 1796 wrote to memory of 420	1796	svchost.exe	3
PID 1796 wrote to memory of 420	1796	svchost.exe	3
PID 1796 wrote to memory of 420	1796	svchost.exe	3
PID 1796 wrote to memory of 420	1796	svchost.exe	3
PID 1796 wrote to memory of 420	1796	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 netsvcs
  2⤵
  PID:872
- - \\?\C:\Windows\system32\wbem\WMIADAP.EXE
    wmiadap.exe /F /T /R
    3⤵
    PID:1764
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1260
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1028
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:272
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:292
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:832
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:796
- 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:664
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1804
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:588
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:680

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

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1424
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\7688f4f49dbbae8587b13c38a200ddd24ed6d7bf94c0165de32ef53ff9d4248f.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:904
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\7688f4f49dbbae8587b13c38a200ddd24ed6d7bf94c0165de32ef53ff9d4248f.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1364
  - - 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:940
    - - 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:824
      - 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:1048
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1796
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 228
      4⤵
      Program crash
      Suspicious use of AdjustPrivilegeToken
      PID:948

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1396

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\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

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
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

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

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

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

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

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

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

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

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

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

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
73KB

MD5
4fce3dca76aa1257e929fa4574001c7b

SHA1
9f66b7373542d2eadfdf0b2deefdde1b5a75961d

SHA256
0d9a606625cd68b736457065e54dc2ab0c620bca5195820bdc146c3dafed7fe8

SHA512
f3546641357ecaf22538fd940ac68f7d4479a04d4783e4cbc9df61b62399185ff266ebb4049d1a9ca6acbc5baca7ec030713543d55c599a03f5c1c8309028cdb

Download Submit
memory/824-81-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/824-211-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/940-64-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/940-70-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1048-77-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1048-213-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1048-73-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1048-82-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1364-63-0x0000000000680000-0x00000000006D4000-memory.dmp

Filesize
336KB

Download
memory/1364-61-0x0000000010000000-0x0000000010074000-memory.dmp

Filesize
464KB

Download
memory/1364-62-0x0000000000680000-0x00000000006D4000-memory.dmp

Filesize
336KB

Download
memory/1364-212-0x0000000010000000-0x0000000010074000-memory.dmp

Filesize
464KB

Download
memory/1364-55-0x0000000076071000-0x0000000076073000-memory.dmp

Filesize
8KB

Download
memory/1796-84-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/1796-87-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download