ramnit | 2761ead814f321b5a5e1d1f51c0e0a28063810d253c2722512667a13b723b42b

Analysis

max time kernel
152s
max time network
158s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 02:28

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General

Target

2761ead814f321b5a5e1d1f51c0e0a28063810d253c2722512667a13b723b42b.dll
Size

472KB
MD5

d65db2e450b05e2d639f3a680b6b7830
SHA1

56935ce9001c2a31a573fdf2a7c6bd9cb8a43bc1
SHA256

2761ead814f321b5a5e1d1f51c0e0a28063810d253c2722512667a13b723b42b
SHA512

5b127445307aa094d39aa019966a2222f3a130465d98c205634c7706ea8b1618a392591dd0cd0c2bd51b4cc0c1480ef1b28e769ea1ae6880da73064c376bac99
SSDEEP

12288:sehnaNPpSVZmNxRCwnwm3W3OHIIf5Rm8iV:seh0PpS6NxNnwYeOHXX7

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
896	rundll32Srv.exe
1468	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/memory/2008-58-0x0000000000200000-0x000000000025B000-memory.dmp	upx
behavioral1/files/0x0007000000005c50-59.dat	upx
behavioral1/files/0x0007000000005c50-61.dat	upx
behavioral1/files/0x0007000000005c50-62.dat	upx
behavioral1/memory/896-65-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/files/0x000b0000000122cc-66.dat	upx
behavioral1/files/0x000b0000000122cc-69.dat	upx
behavioral1/files/0x000b0000000122cc-67.dat	upx
behavioral1/files/0x000b0000000122cc-70.dat	upx
behavioral1/memory/1468-71-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral1/memory/1468-209-0x0000000000400000-0x000000000045B000-memory.dmp	upx

Loads dropped DLL 4 IoCs

pid	Process
2008	rundll32.exe
2008	rundll32.exe
896	rundll32Srv.exe
896	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\px6C99.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 (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\7-zip.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\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
2016	2008	WerFault.exe	26

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
1468	WaterMark.exe
1468	WaterMark.exe
1468	WaterMark.exe
1468	WaterMark.exe
1468	WaterMark.exe
1468	WaterMark.exe
1468	WaterMark.exe
1468	WaterMark.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe
560	svchost.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1468	WaterMark.exe
Token: SeDebugPrivilege	560	svchost.exe
Token: SeDebugPrivilege	2008	rundll32.exe
Token: SeDebugPrivilege	2016	WerFault.exe
Token: SeDebugPrivilege	1468	WaterMark.exe
Token: SeDebugPrivilege	1124	svchost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 1220 wrote to memory of 2008	1220	rundll32.exe	26
PID 2008 wrote to memory of 896	2008	rundll32.exe	27
PID 2008 wrote to memory of 896	2008	rundll32.exe	27
PID 2008 wrote to memory of 896	2008	rundll32.exe	27
PID 2008 wrote to memory of 896	2008	rundll32.exe	27
PID 2008 wrote to memory of 2016	2008	rundll32.exe	28
PID 2008 wrote to memory of 2016	2008	rundll32.exe	28
PID 2008 wrote to memory of 2016	2008	rundll32.exe	28
PID 2008 wrote to memory of 2016	2008	rundll32.exe	28
PID 896 wrote to memory of 1468	896	rundll32Srv.exe	29
PID 896 wrote to memory of 1468	896	rundll32Srv.exe	29
PID 896 wrote to memory of 1468	896	rundll32Srv.exe	29
PID 896 wrote to memory of 1468	896	rundll32Srv.exe	29
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 1124	1468	WaterMark.exe	30
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 1468 wrote to memory of 560	1468	WaterMark.exe	31
PID 560 wrote to memory of 260	560	svchost.exe	25
PID 560 wrote to memory of 260	560	svchost.exe	25
PID 560 wrote to memory of 260	560	svchost.exe	25
PID 560 wrote to memory of 260	560	svchost.exe	25
PID 560 wrote to memory of 260	560	svchost.exe	25
PID 560 wrote to memory of 332	560	svchost.exe	24
PID 560 wrote to memory of 332	560	svchost.exe	24
PID 560 wrote to memory of 332	560	svchost.exe	24
PID 560 wrote to memory of 332	560	svchost.exe	24
PID 560 wrote to memory of 332	560	svchost.exe	24
PID 560 wrote to memory of 368	560	svchost.exe	23
PID 560 wrote to memory of 368	560	svchost.exe	23
PID 560 wrote to memory of 368	560	svchost.exe	23
PID 560 wrote to memory of 368	560	svchost.exe	23
PID 560 wrote to memory of 368	560	svchost.exe	23
PID 560 wrote to memory of 376	560	svchost.exe	22
PID 560 wrote to memory of 376	560	svchost.exe	22
PID 560 wrote to memory of 376	560	svchost.exe	22
PID 560 wrote to memory of 376	560	svchost.exe	22
PID 560 wrote to memory of 376	560	svchost.exe	22
PID 560 wrote to memory of 416	560	svchost.exe	3
PID 560 wrote to memory of 416	560	svchost.exe	3
PID 560 wrote to memory of 416	560	svchost.exe	3
PID 560 wrote to memory of 416	560	svchost.exe	3
PID 560 wrote to memory of 416	560	svchost.exe	3

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:476

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:460
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:868
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:956
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1112
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1164
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1048
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:676
- 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 LocalService
  2⤵
  PID:824
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:792
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:732
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:660
- 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\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1284
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\2761ead814f321b5a5e1d1f51c0e0a28063810d253c2722512667a13b723b42b.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1220
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\2761ead814f321b5a5e1d1f51c0e0a28063810d253c2722512667a13b723b42b.dll,#1
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2008
  - - 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:896
    - - 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:1468
      - 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:1124
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\system32\svchost.exe
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:560
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2008 -s 228
      4⤵
      Program crash
      Suspicious use of AdjustPrivilegeToken
      PID:2016

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1232

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
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:376

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
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

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

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

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

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

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

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

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

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

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

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

Download Submit
\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
d42b1312a4843705ddb9c9ee6ac1bd2d

SHA1
cbef4dc54b47f09d0ed37200694d62f19d0b249a

SHA256
aa0c1e6acd98bae8e3f3ef38c3d687571ffcea30b2d237fa5015ba9c846afada

SHA512
c8c5c9e5b0a713b754794ba6b24145bd05132b6dde919d28bedb63c600a0e557ce801e5624f18a9ddd7e6a90daa5bdfdac7d0e778fdde1dc6924b9b5f5dfacb6

Download Submit
memory/560-83-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/560-86-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/896-65-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1124-81-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1124-211-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1124-73-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1124-77-0x0000000020010000-0x0000000020021000-memory.dmp

Filesize
68KB

Download
memory/1468-209-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1468-71-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/2008-58-0x0000000000200000-0x000000000025B000-memory.dmp

Filesize
364KB

Download
memory/2008-57-0x0000000010000000-0x0000000010078000-memory.dmp

Filesize
480KB

Download
memory/2008-55-0x0000000074D81000-0x0000000074D83000-memory.dmp

Filesize
8KB

Download
memory/2008-138-0x0000000020020000-0x000000002002B000-memory.dmp

Filesize
44KB

Download
memory/2008-207-0x0000000010000000-0x0000000010078000-memory.dmp

Filesize
480KB

Download
memory/2008-208-0x0000000000200000-0x000000000025B000-memory.dmp

Filesize
364KB

Download
memory/2008-63-0x0000000000200000-0x000000000025B000-memory.dmp

Filesize
364KB

Download
memory/2008-210-0x0000000000200000-0x000000000025B000-memory.dmp

Filesize
364KB

Download