e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5

Analysis

max time kernel
71s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
06-12-2022 19:41

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General

Target

e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe
Size

174KB
MD5

409876e66f0f8b6c97e6075646d835f5
SHA1

39ddb998c8b34d0261d918522bad2707f6fb4437
SHA256

e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5
SHA512

07f788cd47ba8c9f1b8f493a98011a9902189f33bb8f9f459165ce6845f7e759879c442d030e82efccd6584dd4f9252b39f33c0b9e7447a5150e8a03c1fd9204
SSDEEP

3072:Veyqi23Bh+lErnajqac+aXrJ3B1r4qbinmcW9speqVqqhVZslIP:VWRIlEruY9BJ49mR9fqVqqKc

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\\e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe\""	e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe

Disables Task Manager via registry modification
evasion

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1980-55-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/1980-57-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/1980-59-0x0000000000400000-0x000000000046E000-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
1176	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	taskkill.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 1176	1980	e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe	28
PID 1980 wrote to memory of 1176	1980	e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe	28
PID 1980 wrote to memory of 1176	1980	e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe	28
PID 1980 wrote to memory of 1176	1980	e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe	28

C:\Users\Admin\AppData\Local\Temp\e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe
"C:\Users\Admin\AppData\Local\Temp\e4c93cb4e905b760b885629aa4a148e904569e1f602284a84a7e7d3446a3d6c5.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im explorer.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1176

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/1980-54-0x00000000760C1000-0x00000000760C3000-memory.dmp

Filesize
8KB

Download
memory/1980-55-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1980-56-0x0000000000230000-0x0000000000235000-memory.dmp

Filesize
20KB

Download
memory/1980-57-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1980-59-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download