ramnit | a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb

Analysis

max time kernel
151s
max time network
143s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
01-12-2022 19:53

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General

Target

a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe
Size

93KB
MD5

62b0ff03b0a788450221d410991e6ec3
SHA1

c2659f855fadb03225df497c9aa5b2a734b36500
SHA256

a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb
SHA512

5cef05b3a2c651794d0c1404c69e487f4b9abe5b31911cfd740f01dcd892ae45298f41674277b5e061cf6e5b75e6d14a0f0a5b73a9b20a5f0634335040b837c1
SSDEEP

1536:1VZnxm6MG9xgfrvEaoiT/GyphjXDYjKwttoswRmhApE:lnxwgxgfR/DVG7wBpE

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 1 IoCs

pid	Process
948	WaterMark.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1528-56-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1528-57-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1528-58-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/1528-63-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral1/memory/1528-60-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/948-79-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/948-80-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/948-192-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe
1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
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 8 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft\WaterMark.exe	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.exe	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe
File opened for modification	C:\Program Files (x86)\Microsoft\WaterMark.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\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 (x86)\Microsoft\px6CE7.tmp	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
948	WaterMark.exe
948	WaterMark.exe
948	WaterMark.exe
948	WaterMark.exe
948	WaterMark.exe
948	WaterMark.exe
948	WaterMark.exe
948	WaterMark.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe
888	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	948	WaterMark.exe
Token: SeDebugPrivilege	888	svchost.exe
Token: SeDebugPrivilege	948	WaterMark.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe
948	WaterMark.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 948	1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe	28
PID 1528 wrote to memory of 948	1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe	28
PID 1528 wrote to memory of 948	1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe	28
PID 1528 wrote to memory of 948	1528	a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe	28
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 584	948	WaterMark.exe	29
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 948 wrote to memory of 888	948	WaterMark.exe	30
PID 888 wrote to memory of 260	888	svchost.exe	7
PID 888 wrote to memory of 260	888	svchost.exe	7
PID 888 wrote to memory of 260	888	svchost.exe	7
PID 888 wrote to memory of 260	888	svchost.exe	7
PID 888 wrote to memory of 260	888	svchost.exe	7
PID 888 wrote to memory of 332	888	svchost.exe	6
PID 888 wrote to memory of 332	888	svchost.exe	6
PID 888 wrote to memory of 332	888	svchost.exe	6
PID 888 wrote to memory of 332	888	svchost.exe	6
PID 888 wrote to memory of 332	888	svchost.exe	6
PID 888 wrote to memory of 368	888	svchost.exe	5
PID 888 wrote to memory of 368	888	svchost.exe	5
PID 888 wrote to memory of 368	888	svchost.exe	5
PID 888 wrote to memory of 368	888	svchost.exe	5
PID 888 wrote to memory of 368	888	svchost.exe	5
PID 888 wrote to memory of 388	888	svchost.exe	4
PID 888 wrote to memory of 388	888	svchost.exe	4
PID 888 wrote to memory of 388	888	svchost.exe	4
PID 888 wrote to memory of 388	888	svchost.exe	4
PID 888 wrote to memory of 388	888	svchost.exe	4
PID 888 wrote to memory of 424	888	svchost.exe	3
PID 888 wrote to memory of 424	888	svchost.exe	3
PID 888 wrote to memory of 424	888	svchost.exe	3
PID 888 wrote to memory of 424	888	svchost.exe	3
PID 888 wrote to memory of 424	888	svchost.exe	3
PID 888 wrote to memory of 468	888	svchost.exe	2
PID 888 wrote to memory of 468	888	svchost.exe	2
PID 888 wrote to memory of 468	888	svchost.exe	2
PID 888 wrote to memory of 468	888	svchost.exe	2
PID 888 wrote to memory of 468	888	svchost.exe	2
PID 888 wrote to memory of 484	888	svchost.exe	1
PID 888 wrote to memory of 484	888	svchost.exe	1
PID 888 wrote to memory of 484	888	svchost.exe	1
PID 888 wrote to memory of 484	888	svchost.exe	1
PID 888 wrote to memory of 484	888	svchost.exe	1
PID 888 wrote to memory of 492	888	svchost.exe	8
PID 888 wrote to memory of 492	888	svchost.exe	8
PID 888 wrote to memory of 492	888	svchost.exe	8
PID 888 wrote to memory of 492	888	svchost.exe	8
PID 888 wrote to memory of 492	888	svchost.exe	8

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 RPCSS
  2⤵
  PID:668
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:800
- - C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    3⤵
    PID:1200
- 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 NetworkService
  2⤵
  PID:272
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  PID:868
- - \\?\C:\Windows\system32\wbem\WMIADAP.EXE
    wmiadap.exe /F /T /R
    3⤵
    PID:1208
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  PID:752
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:592
- - C:\Windows\system32\wbem\wmiprvse.exe
    C:\Windows\system32\wbem\wmiprvse.exe
    3⤵
    PID:1344
- C:\Windows\System32\spoolsv.exe
  C:\Windows\System32\spoolsv.exe
  2⤵
  PID:536
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
  2⤵
  PID:1040
- C:\Windows\system32\taskhost.exe
  "taskhost.exe"
  2⤵
  PID:1120
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
  2⤵
  PID:1856
- C:\Windows\system32\sppsvc.exe
  C:\Windows\system32\sppsvc.exe
  2⤵
  PID:1876

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:424

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:388

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:368
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:492

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\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1244
- C:\Users\Admin\AppData\Local\Temp\a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe
  "C:\Users\Admin\AppData\Local\Temp\a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:1528
- - C:\Program Files (x86)\Microsoft\WaterMark.exe
    "C:\Program Files (x86)\Microsoft\WaterMark.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of UnmapMainImage
    - Suspicious use of WriteProcessMemory
    PID:948
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\system32\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Drops file in System32 directory
      Drops file in Program Files directory
      PID:584
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\system32\svchost.exe
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:888

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
93KB

MD5
62b0ff03b0a788450221d410991e6ec3

SHA1
c2659f855fadb03225df497c9aa5b2a734b36500

SHA256
a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb

SHA512
5cef05b3a2c651794d0c1404c69e487f4b9abe5b31911cfd740f01dcd892ae45298f41674277b5e061cf6e5b75e6d14a0f0a5b73a9b20a5f0634335040b837c1

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

Filesize
93KB

MD5
62b0ff03b0a788450221d410991e6ec3

SHA1
c2659f855fadb03225df497c9aa5b2a734b36500

SHA256
a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb

SHA512
5cef05b3a2c651794d0c1404c69e487f4b9abe5b31911cfd740f01dcd892ae45298f41674277b5e061cf6e5b75e6d14a0f0a5b73a9b20a5f0634335040b837c1

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

Filesize
93KB

MD5
62b0ff03b0a788450221d410991e6ec3

SHA1
c2659f855fadb03225df497c9aa5b2a734b36500

SHA256
a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb

SHA512
5cef05b3a2c651794d0c1404c69e487f4b9abe5b31911cfd740f01dcd892ae45298f41674277b5e061cf6e5b75e6d14a0f0a5b73a9b20a5f0634335040b837c1

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

Filesize
93KB

MD5
62b0ff03b0a788450221d410991e6ec3

SHA1
c2659f855fadb03225df497c9aa5b2a734b36500

SHA256
a8fab5acf03d9b43051db8fea7cc505b8d68ace36b5409b18b09fd782005aceb

SHA512
5cef05b3a2c651794d0c1404c69e487f4b9abe5b31911cfd740f01dcd892ae45298f41674277b5e061cf6e5b75e6d14a0f0a5b73a9b20a5f0634335040b837c1

Download Submit
memory/584-75-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/584-81-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/584-193-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/584-71-0x0000000020010000-0x0000000020022000-memory.dmp

Filesize
72KB

Download
memory/584-73-0x0000000000000000-mapping.dmp

Download
memory/584-74-0x00000000757B1000-0x00000000757B3000-memory.dmp

Filesize
8KB

Download
memory/888-85-0x0000000000000000-mapping.dmp

Download
memory/888-83-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/888-86-0x0000000020010000-0x000000002001B000-memory.dmp

Filesize
44KB

Download
memory/948-62-0x0000000000000000-mapping.dmp

Download
memory/948-79-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-80-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/948-192-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1528-60-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1528-56-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1528-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1528-58-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1528-57-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download