Malware Analysis Report

2024-07-28 12:16

Sample ID 240613-3m8ylawang
Target 6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225
SHA256 6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225
Tags
ramnit banker spyware stealer trojan upx worm
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225

Threat Level: Known bad

The file 6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225 was found to be: Known bad.

Malicious Activity Summary

ramnit banker spyware stealer trojan upx worm

Ramnit

UPX dump on OEP (original entry point)

Executes dropped EXE

Loads dropped DLL

UPX packed file

Drops file in System32 directory

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-06-13 23:39

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 23:39

Reported

2024-06-13 23:41

Platform

win7-20240220-en

Max time kernel

119s

Max time network

124s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225.dll,#1

Signatures

Ramnit

trojan spyware stealer worm banker ramnit

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\rundll32mgr.exe C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2252 wrote to memory of 2120 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2120 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 2120 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 2120 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 2120 wrote to memory of 2712 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225.dll,#1

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\rundll32mgr.exe

Network

N/A

Files

\Windows\SysWOW64\rundll32mgr.exe

MD5 f8434f362add5334f4f050f4b4b373a7
SHA1 f5915cb0d72c8faffe11126bc29da1b1db8092bc
SHA256 d34b378ede04c585c2bff8cf32112904e8512ee80c5a9fbb34ba224d8dbc868b
SHA512 6c6b4ea2b0e37a346145ee2814789d9da4c2688aff1c3e1cced16a620e8dc81566670336a3fe8a510b1754bbac6c3c6ac20aa7e20359b9c322bb220b50ac30b9

memory/2120-2-0x0000000074340000-0x0000000074781000-memory.dmp

memory/2120-9-0x0000000073EF0000-0x0000000074331000-memory.dmp

memory/2120-10-0x0000000074340000-0x0000000074781000-memory.dmp

\Users\Admin\AppData\Local\Temp\~TM1017.tmp

MD5 d124f55b9393c976963407dff51ffa79
SHA1 2c7bbedd79791bfb866898c85b504186db610b5d
SHA256 ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef
SHA512 278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

memory/2712-16-0x0000000000400000-0x000000000042A000-memory.dmp

memory/2712-15-0x00000000003A0000-0x00000000003CA000-memory.dmp

memory/2120-12-0x0000000073EF0000-0x0000000074331000-memory.dmp

\Users\Admin\AppData\Local\Temp\~TM1037.tmp

MD5 9b98d47916ead4f69ef51b56b0c2323c
SHA1 290a80b4ded0efc0fd00816f373fcea81a521330
SHA256 96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b
SHA512 68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94

memory/2712-20-0x0000000000400000-0x000000000042A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 23:39

Reported

2024-06-13 23:41

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

51s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225.dll,#1

Signatures

Ramnit

trojan spyware stealer worm banker ramnit

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\rundll32mgr.exe C:\Windows\SysWOW64\rundll32.exe N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32mgr.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1884 wrote to memory of 3660 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1884 wrote to memory of 3660 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1884 wrote to memory of 3660 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3660 wrote to memory of 3132 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 3660 wrote to memory of 3132 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 3660 wrote to memory of 3132 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6621fb15aa9f4cd80a2dd88715f6418330e9e7ac6763fc0e736192504e752225.dll,#1

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3132 -ip 3132

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3132 -s 10176

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

C:\Windows\SysWOW64\rundll32mgr.exe

MD5 f8434f362add5334f4f050f4b4b373a7
SHA1 f5915cb0d72c8faffe11126bc29da1b1db8092bc
SHA256 d34b378ede04c585c2bff8cf32112904e8512ee80c5a9fbb34ba224d8dbc868b
SHA512 6c6b4ea2b0e37a346145ee2814789d9da4c2688aff1c3e1cced16a620e8dc81566670336a3fe8a510b1754bbac6c3c6ac20aa7e20359b9c322bb220b50ac30b9

memory/3660-2-0x0000000075300000-0x0000000075741000-memory.dmp

memory/3132-5-0x0000000000690000-0x00000000006BA000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\~TM537F.tmp

MD5 4f3387277ccbd6d1f21ac5c07fe4ca68
SHA1 e16506f662dc92023bf82def1d621497c8ab5890
SHA256 767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac
SHA512 9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

memory/3132-9-0x0000000000400000-0x000000000042A000-memory.dmp

memory/3132-11-0x0000000000690000-0x00000000006BA000-memory.dmp