716272bae1242dac76e8747c157b6852cce3913cc30af94638a1299d71c81639

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 06:29

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General

Target

111965a1071b78a32eb94e36b4225565.exe
Size

12KB
MD5

111965a1071b78a32eb94e36b4225565
SHA1

fb0ef6cdc2e5d33e5e851b0f3b1bf7075e32c278
SHA256

716272bae1242dac76e8747c157b6852cce3913cc30af94638a1299d71c81639
SHA512

55a33ac2bad75ab19ff88b3d20ab6b32d54803e69c439b49a4e0d3251f1b0d8b4864ea9e1a048f4498a16f26e6f3cac2aeb230c67dce19834197de1fa2bef3af
SSDEEP

384:H9UOVMH+KqqK0zHt1+b7aV17SKqEoUGKy+:dUO+qQzJTS9EZGK

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Deletes itself 1 IoCs

pid	Process
2816	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2020	zesttnsk.exe

Loads dropped DLL 2 IoCs

pid	Process
2056	111965a1071b78a32eb94e36b4225565.exe
2056	111965a1071b78a32eb94e36b4225565.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2056-1-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2020-12-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2056-5-0x0000000000030000-0x000000000003F000-memory.dmp	upx
behavioral1/memory/2056-20-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2020-22-0x0000000000400000-0x000000000040F000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\zesttnsk.exe	111965a1071b78a32eb94e36b4225565.exe
File created	C:\Windows\SysWOW64\zesttns.dll	111965a1071b78a32eb94e36b4225565.exe
File created	C:\Windows\SysWOW64\zesttnsk.exe	111965a1071b78a32eb94e36b4225565.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2056	111965a1071b78a32eb94e36b4225565.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 2020	2056	111965a1071b78a32eb94e36b4225565.exe	28
PID 2056 wrote to memory of 2020	2056	111965a1071b78a32eb94e36b4225565.exe	28
PID 2056 wrote to memory of 2020	2056	111965a1071b78a32eb94e36b4225565.exe	28
PID 2056 wrote to memory of 2020	2056	111965a1071b78a32eb94e36b4225565.exe	28
PID 2056 wrote to memory of 2816	2056	111965a1071b78a32eb94e36b4225565.exe	30
PID 2056 wrote to memory of 2816	2056	111965a1071b78a32eb94e36b4225565.exe	30
PID 2056 wrote to memory of 2816	2056	111965a1071b78a32eb94e36b4225565.exe	30
PID 2056 wrote to memory of 2816	2056	111965a1071b78a32eb94e36b4225565.exe	30

C:\Users\Admin\AppData\Local\Temp\111965a1071b78a32eb94e36b4225565.exe
"C:\Users\Admin\AppData\Local\Temp\111965a1071b78a32eb94e36b4225565.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2056
- C:\Windows\SysWOW64\zesttnsk.exe
  C:\Windows\system32\zesttnsk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2020
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\111965a1071b78a32eb94e36b4225565.exe.bat
  2⤵
  - Deletes itself
  PID:2816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2020-12-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2020-22-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2056-1-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2056-10-0x0000000000030000-0x000000000003F000-memory.dmp

Filesize
60KB

Download
memory/2056-5-0x0000000000030000-0x000000000003F000-memory.dmp

Filesize
60KB

Download
memory/2056-20-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download