af3be09194290daa72a8987b6e12f9e0b540ccf4bf7c2ddb3588ba2aabfe45b3

Analysis

max time kernel
41s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04-12-2022 12:24

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General

Target

af3be09194290daa72a8987b6e12f9e0b540ccf4bf7c2ddb3588ba2aabfe45b3.dll
Size

237KB
MD5

ee55e9377aba2babbc272efd1ff1f11d
SHA1

f0d5140adecd90f3da0088d9a9e672f918c41b3c
SHA256

af3be09194290daa72a8987b6e12f9e0b540ccf4bf7c2ddb3588ba2aabfe45b3
SHA512

d41df8fe4399d1a02c79421fd16fa0dc07dd8dd24a41ab8d0e541d095b11260dea3bdc1c26f07e4801956b7e3456fed535cac3ade7d852a17569fbea11100196
SSDEEP

1536:ojjcfvcIAuacgaHByoVzAHTPxJNCHVRkhAH4VhbLjgEiwW5bMFe4tvGcGnwk9+6:4+kIAi4IzQJNURkZ7bwwkbMzOwk9t

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\klmbfhhnk = "{6f8bb7d3-e703-3c58-f814-e7033f5b03b8}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2004	rundll32.exe
2004	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\xyzosuuax.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\xyzosuuax.dll	rundll32.exe
File created	C:\Windows\SysWOW64\jklaeggmj.dll	rundll32.exe
File created	C:\Windows\SysWOW64\fghwaccif.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6f8bb7d3-e703-3c58-f814-e7033f5b03b8}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6f8bb7d3-e703-3c58-f814-e7033f5b03b8}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6f8bb7d3-e703-3c58-f814-e7033f5b03b8}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6f8bb7d3-e703-3c58-f814-e7033f5b03b8}\InprocServer32\ = "C:\\Windows\\SysWow64\\fghwaccif.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6f8bb7d3-e703-3c58-f814-e7033f5b03b8}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2004	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28
PID 1280 wrote to memory of 2004	1280	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\af3be09194290daa72a8987b6e12f9e0b540ccf4bf7c2ddb3588ba2aabfe45b3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\af3be09194290daa72a8987b6e12f9e0b540ccf4bf7c2ddb3588ba2aabfe45b3.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 use of SetWindowsHookEx
  PID:2004

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

Replay Monitor

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Downloads

\Windows\SysWOW64\jklaeggmj.dll

Filesize
1.1MB

MD5
9b98d47916ead4f69ef51b56b0c2323c

SHA1
290a80b4ded0efc0fd00816f373fcea81a521330

SHA256
96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b

SHA512
68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94

Download Submit
\Windows\SysWOW64\xyzosuuax.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2004-54-0x0000000000000000-mapping.dmp

Download
memory/2004-55-0x0000000075811000-0x0000000075813000-memory.dmp

Filesize
8KB

Download
memory/2004-56-0x0000000000220000-0x0000000000265000-memory.dmp

Filesize
276KB

Download
memory/2004-58-0x0000000000220000-0x0000000000265000-memory.dmp

Filesize
276KB

Download
memory/2004-60-0x0000000000220000-0x0000000000265000-memory.dmp

Filesize
276KB

Download