5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369

Analysis

max time kernel
154s
max time network
180s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
02-08-2022 04:11

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General

Target

5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe
Size

242KB
MD5

f3bb116720f37b7b2d1f12599feac582
SHA1

9810174d6533d843c89c84a0d4e6487177c26b69
SHA256

5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369
SHA512

8b5bc8a41596da47a7ee217870ed4309cd8b398c50a02f83bd17452c8e336ec60339891783454b871dfc46d12a419a2eb689f95912564cf650c5b529e49f1d91

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

winrrcc.exe

pid process

4768 winrrcc.exe

pid	process
4768	winrrcc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update 427256357 = "C:\\Windows\\5117202417101548\\winrrcc.exe"	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update 427256357 = "C:\\Windows\\5117202417101548\\winrrcc.exe"	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe

Drops file in Windows directory 3 IoCs

Processes:

5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe

description	ioc	process
File opened for modification	C:\Windows\5117202417101548\winrrcc.exe	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe
File opened for modification	C:\Windows\5117202417101548	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe
File created	C:\Windows\5117202417101548\winrrcc.exe	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
3736	540	WerFault.exe	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe
4624	4768	WerFault.exe	winrrcc.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe

description	pid	process	target process
PID 540 wrote to memory of 4768	540	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe	winrrcc.exe
PID 540 wrote to memory of 4768	540	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe	winrrcc.exe
PID 540 wrote to memory of 4768	540	5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe	winrrcc.exe

C:\Users\Admin\AppData\Local\Temp\5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe
"C:\Users\Admin\AppData\Local\Temp\5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:540
- C:\Windows\5117202417101548\winrrcc.exe
  C:\Windows\5117202417101548\winrrcc.exe
  2⤵
  - Executes dropped EXE
  PID:4768
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4768 -s 424
    3⤵
    - Program crash
    PID:4624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 540 -s 464
  2⤵
  - Program crash
  PID:3736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 540 -ip 540
1⤵
PID:3408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4768 -ip 4768
1⤵
PID:4000

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

C:\Windows\5117202417101548\winrrcc.exe

Filesize
242KB

MD5
f3bb116720f37b7b2d1f12599feac582

SHA1
9810174d6533d843c89c84a0d4e6487177c26b69

SHA256
5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369

SHA512
8b5bc8a41596da47a7ee217870ed4309cd8b398c50a02f83bd17452c8e336ec60339891783454b871dfc46d12a419a2eb689f95912564cf650c5b529e49f1d91

Download Submit
C:\Windows\5117202417101548\winrrcc.exe

Filesize
242KB

MD5
f3bb116720f37b7b2d1f12599feac582

SHA1
9810174d6533d843c89c84a0d4e6487177c26b69

SHA256
5a42e580aa875567dd08135b5f89ae69f4a541b9c737125f9123ad0ed5f5b369

SHA512
8b5bc8a41596da47a7ee217870ed4309cd8b398c50a02f83bd17452c8e336ec60339891783454b871dfc46d12a419a2eb689f95912564cf650c5b529e49f1d91

Download Submit
memory/540-130-0x0000000005617000-0x000000000561F000-memory.dmp

Filesize
32KB

Download
memory/540-131-0x0000000005617000-0x000000000561F000-memory.dmp

Filesize
32KB

Download
memory/540-132-0x0000000000400000-0x000000000529D000-memory.dmp

Filesize
78.6MB

Download
memory/540-139-0x0000000005617000-0x000000000561F000-memory.dmp

Filesize
32KB

Download
memory/540-140-0x0000000000400000-0x000000000529D000-memory.dmp

Filesize
78.6MB

Download
memory/4768-133-0x0000000000000000-mapping.dmp

Download
memory/4768-136-0x0000000005657000-0x000000000565F000-memory.dmp

Filesize
32KB

Download
memory/4768-137-0x0000000005657000-0x000000000565F000-memory.dmp

Filesize
32KB

Download
memory/4768-138-0x0000000000400000-0x000000000529D000-memory.dmp

Filesize
78.6MB

Download
memory/4768-141-0x0000000000400000-0x000000000529D000-memory.dmp

Filesize
78.6MB

Download