dcdcbee43842a2b872e14131b9e99ae69faa3853cdee24ffbf62d0a6fc4eaef7

Analysis

max time kernel
117s
max time network
134s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 04:44

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General

Target

05db5873ac698ff744b9378fc176fed2.dll
Size

231KB
MD5

05db5873ac698ff744b9378fc176fed2
SHA1

bd405be67ce5006d4dffa957d90f0303c65cc795
SHA256

dcdcbee43842a2b872e14131b9e99ae69faa3853cdee24ffbf62d0a6fc4eaef7
SHA512

c872016fc1e36ddddacf53f1a2a59e75aa2b4c99e20f09965f58379e07d5732023f552727a1973167a789def0ad283fc537f46958b7cc74340fdced114a73174
SSDEEP

3072:zysX0WxnWd/IkmL+PViEbmzwtz/wk8YWbH:mskd/IkmuVfyWdMH

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\mgelohw = "{ae4789e6-26cf-7b14-37d0-26cf016e587b}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2848	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ae4789e6-26cf-7b14-37d0-26cf016e587b}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ae4789e6-26cf-7b14-37d0-26cf016e587b}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ae4789e6-26cf-7b14-37d0-26cf016e587b}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ae4789e6-26cf-7b14-37d0-26cf016e587b}\InprocServer32\ = "C:\\Windows\\SysWow64\\hbzgjcr.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ae4789e6-26cf-7b14-37d0-26cf016e587b}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2848	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2848	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16
PID 2060 wrote to memory of 2848	2060	rundll32.exe	16

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\05db5873ac698ff744b9378fc176fed2.dll,#1
1⤵
- 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:2848

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\05db5873ac698ff744b9378fc176fed2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2060

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

Replay Monitor

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Downloads

\Windows\SysWOW64\ztrybuj.dll

Filesize
11KB

MD5
8083be9b07eba78e1c70ec9fcea1b0a7

SHA1
dafe9e7a2b66f8b131cac20d17f6794db56acf87

SHA256
6a8665ec9d9bb6700a50c6fd32e333965a5800c7aa61ba841ccf9457b6fb3404

SHA512
202284754360b2c8c1c56ca706f118c9e5d492d2586f8948e96936a8b4d2f70f68d6ab237fa687aeb860ffa768462b902f1bee9b8ba6c20e98fba701f46b3434

Download Submit
memory/2848-0-0x00000000001E0000-0x0000000000223000-memory.dmp

Filesize
268KB

Download
memory/2848-2-0x00000000001E0000-0x0000000000223000-memory.dmp

Filesize
268KB

Download
memory/2848-9-0x00000000768F0000-0x0000000076990000-memory.dmp

Filesize
640KB

Download
memory/2848-11-0x00000000768F0000-0x0000000076990000-memory.dmp

Filesize
640KB

Download
memory/2848-10-0x00000000001E0000-0x0000000000223000-memory.dmp

Filesize
268KB

Download