c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2022 05:40

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General

Target

c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe
Size

40KB
MD5

056929e078b133dd231903ce0293f1e0
SHA1

24aaff0cca4266d08545cfa438df8f5da87caa02
SHA256

c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba
SHA512

636c143a2ef1bc828e2d9f1e5ca3b457a7a222ab1219d261936ebbd0adab15a6c26f66e821f55967b45f8b896d3088934435b2a0be5059edcda85144b4ba6697
SSDEEP

768:/O8QOt6m1+Mj2y75iaAVWwedbsfB94OMrA8ihATMk3LOL++i4:/O8QRMjOVDeqfB94OMrA8ihS7LOL+n4

Score

8^/10

discovery exploit persistence

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3420 takeown.exe
3532 icacls.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

3420 takeown.exe
3532 icacls.exe

pid	process
3420	takeown.exe
3532	icacls.exe

pid	process
3420	takeown.exe
3532	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\vyor = "C:\\Windows\\system32\\yshno.exe"	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

Drops file in System32 directory 2 IoCs

Processes:

c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

description	ioc	process
File created	C:\Windows\SysWOW64\yshno.exe	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe
File opened for modification	C:\Windows\SysWOW64\yshno.exe	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

pid process

4964 c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

pid	process
4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe

description	pid	process	target process
PID 4964 wrote to memory of 3420	4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe	takeown.exe
PID 4964 wrote to memory of 3420	4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe	takeown.exe
PID 4964 wrote to memory of 3420	4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe	takeown.exe
PID 4964 wrote to memory of 3532	4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe	icacls.exe
PID 4964 wrote to memory of 3532	4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe	icacls.exe
PID 4964 wrote to memory of 3532	4964	c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe	icacls.exe

C:\Users\Admin\AppData\Local\Temp\c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe
"C:\Users\Admin\AppData\Local\Temp\c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4964
- C:\Windows\SysWOW64\takeown.exe
  C:\Windows\system32\takeown.exe /f "C:\Windows\system32\yshno.exe"
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:3420
- C:\Windows\SysWOW64\icacls.exe
  C:\Windows\system32\icacls.exe "C:\Windows\system32\yshno.exe" /grant Users:F
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:3532

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\yshno.exe

Filesize
40KB

MD5
056929e078b133dd231903ce0293f1e0

SHA1
24aaff0cca4266d08545cfa438df8f5da87caa02

SHA256
c6afa31931605bdfdaf698053eff9a0d00835265d38d1006d6c1192f7292a6ba

SHA512
636c143a2ef1bc828e2d9f1e5ca3b457a7a222ab1219d261936ebbd0adab15a6c26f66e821f55967b45f8b896d3088934435b2a0be5059edcda85144b4ba6697

Download Submit
memory/3420-137-0x0000000000000000-mapping.dmp

Download
memory/3532-138-0x0000000000000000-mapping.dmp

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