67eaeb966801b5796bb33dc3287af43c196e96f5d2e44bec962f235e0dcad5a0

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 17:12

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General

Target

07bb1840709978dd51f9993f92f8ec76.dll
Size

236KB
MD5

07bb1840709978dd51f9993f92f8ec76
SHA1

c536d1dd6dc41bc3e514936d46220f1e6f925874
SHA256

67eaeb966801b5796bb33dc3287af43c196e96f5d2e44bec962f235e0dcad5a0
SHA512

7974d12dcfcaf6718984d12e1c9073dbc5f1d55a32720eefc1d61bae9d6b9f867068b842a8208d1db5a722e51d2ed52ff92450be7bdeaaeac61b175ebf274c9a
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIt:+Qj9U3jwO3rt5i

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

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\odwuzqetj = "{4f28f68b-c7a0-1cf5-d8b1-c7a07e039bf7}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2128	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4f28f68b-c7a0-1cf5-d8b1-c7a07e039bf7}\InprocServer32\ = "C:\\Windows\\SysWow64\\jyrpulzoe.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4f28f68b-c7a0-1cf5-d8b1-c7a07e039bf7}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4f28f68b-c7a0-1cf5-d8b1-c7a07e039bf7}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4f28f68b-c7a0-1cf5-d8b1-c7a07e039bf7}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4f28f68b-c7a0-1cf5-d8b1-c7a07e039bf7}\InprocServer32	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2128	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2128	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2128	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16
PID 1040 wrote to memory of 2128	1040	rundll32.exe	16

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\07bb1840709978dd51f9993f92f8ec76.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\07bb1840709978dd51f9993f92f8ec76.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:2128

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\bqjhmdrgw.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2128-8-0x0000000075740000-0x00000000757E0000-memory.dmp

Filesize
640KB

Download
memory/2128-1-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2128-9-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2128-10-0x0000000075740000-0x00000000757E0000-memory.dmp

Filesize
640KB

Download