a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f

Analysis

max time kernel
67s
max time network
81s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29-10-2022 00:16

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General

Target

a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
Size

52KB
MD5

0ab5a0cab786688729462c7f947041e1
SHA1

3efa45beba70450f97ac66deb6c4cdecaefbbd36
SHA256

a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f
SHA512

220e02eab8a854cc6fb6e3f41c66c21fa937078a32029174e662345e661ecf091a85f9a170119e3b5c3d134021bba9889d7bc77059fdc050f47632c8940a2a5f
SSDEEP

768:ZBexmBBSvNF0Kkn1TLaPC1XSlsiTCHpySXckZzXvakTkEqUNOrQQ8w59gCb5g/UT:XamBAvlknV24TrCkTkQNOCJUD

Score

8^/10

discovery exploit persistence

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3320 takeown.exe
3984 icacls.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

3320 takeown.exe
3984 icacls.exe

pid	process
3320	takeown.exe
3984	icacls.exe

pid	process
3320	takeown.exe
3984	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MdFU = "c:\\windows\\system32\\mkemr.exe"	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

Drops file in System32 directory 2 IoCs

Processes:

a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

description	ioc	process
File created	\??\c:\windows\SysWOW64\mkemr.exe	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
File opened for modification	\??\c:\windows\SysWOW64\mkemr.exe	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

pid process

4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

pid	process
4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe

description	pid	process	target process
PID 4416 wrote to memory of 3320	4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe	takeown.exe
PID 4416 wrote to memory of 3320	4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe	takeown.exe
PID 4416 wrote to memory of 3320	4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe	takeown.exe
PID 4416 wrote to memory of 3984	4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe	icacls.exe
PID 4416 wrote to memory of 3984	4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe	icacls.exe
PID 4416 wrote to memory of 3984	4416	a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe	icacls.exe

C:\Users\Admin\AppData\Local\Temp\a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
"C:\Users\Admin\AppData\Local\Temp\a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4416

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /f "c:\windows\system32\mkemr.exe"
2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3320

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe "c:\windows\system32\mkemr.exe" /grant Users:F
2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3984

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

\??\c:\windows\SysWOW64\mkemr.exe
Filesize
23KB

MD5
bb662492c62a73b7d52fe31a2859a34a

SHA1
68692c13d9ca1fc2f869eb8b451fa085e2629630

SHA256
e6516034b5d0c96d61ef94db4cfc61d86793d0c203d6310fec2de42a752bb01d

SHA512
919982233f2f8d76c356d9c7e4451231dfc6ebdea73a2387748d9bff29371411b69c9b7cc8fc9195754b53e3f4218ec59400c28a1d1b7744533a641b8dc516a8

Download Submit
memory/3320-134-0x0000000000000000-mapping.dmp

Download
memory/3984-135-0x0000000000000000-mapping.dmp

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