c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315

Analysis

max time kernel
37s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/12/2022, 23:58

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General

Target

c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe
Size

141KB
MD5

199a2d76ce2930cdc60fe37c419de749
SHA1

d521c0d8160bfa91c76c7fb9c9735c4156ab0859
SHA256

c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315
SHA512

29eb1a0567c46a06a37bd2ed571275ff7e013456050287b39fa70e52e8d668d792e4dd7d843f1089d09c0bd3713eab28a77cec9247e61a163bbb7c785035fd98
SSDEEP

3072:Y7nmcSp5MJ4jEltN/WvaR4NSBxdYPTAyGAN0O4JY1MK:YzmD5MJVd/WvaWNixdY7MBWuK

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe\""	c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe

Disables Task Manager via registry modification
evasion

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2020-55-0x0000000000400000-0x0000000000D64000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1588	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1588	taskkill.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 1588	2020	c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe	26
PID 2020 wrote to memory of 1588	2020	c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe	26
PID 2020 wrote to memory of 1588	2020	c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe	26
PID 2020 wrote to memory of 1588	2020	c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe	26

C:\Users\Admin\AppData\Local\Temp\c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe
"C:\Users\Admin\AppData\Local\Temp\c815a13e1aa44be2c3c55c358799eef48edfc97efe7846fee339f4abf0e6d315.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\SysWOW64\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im explorer.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2020-54-0x0000000075451000-0x0000000075453000-memory.dmp

Filesize
8KB

Download
memory/2020-55-0x0000000000400000-0x0000000000D64000-memory.dmp

Filesize
9.4MB

Download
memory/2020-56-0x0000000000400000-0x0000000000D64000-memory.dmp

Filesize
9.4MB

Download
memory/2020-58-0x0000000000400000-0x0000000000D64000-memory.dmp

Filesize
9.4MB

Download