7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9

Analysis

max time kernel
22s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01/12/2022, 02:45

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General

Target

7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll
Size

236KB
MD5

6c97971f0b4a25ce0b2db72eef6b7cd0
SHA1

90601dde36c25e879abc4a080dd15e4d1c2da2d8
SHA256

7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9
SHA512

b85db7cfc387343355e69f1f00fc8157ffda448de91dffdeca24643b150f89d7beb10ab02019716c5207f006d0a8938961b6473f1715e1fe9e931be85b6be7d3
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIA:+Qj9U3jwO3rt5f

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\ewk = "{6e8f6af2-e607-3b5c-f718-e607e27acfba}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1712	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rjx.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\rjx.dll	rundll32.exe
File created	C:\Windows\SysWOW64\zrf.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\zrf.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\InprocServer32\ = "C:\\Windows\\SysWow64\\zrf.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1712	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1712	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28
PID 1452 wrote to memory of 1712	1452	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1712

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\rjx.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/1712-55-0x0000000075981000-0x0000000075983000-memory.dmp

Filesize
8KB

Download
memory/1712-56-0x0000000000690000-0x00000000006D4000-memory.dmp

Filesize
272KB

Download
memory/1712-58-0x0000000000690000-0x00000000006D4000-memory.dmp

Filesize
272KB

Download
memory/1712-59-0x0000000000690000-0x00000000006D4000-memory.dmp

Filesize
272KB

Download