9cd370d3c02ab492bb1852f32dc1512a29e88c83bee2f75c105f03a835a0f354

Analysis

max time kernel
76s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2023 07:10

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General

Target

2cd6efb80213b0b5a2a308448a859f9b.exe
Size

12KB
MD5

2cd6efb80213b0b5a2a308448a859f9b
SHA1

edb6f03ce19f9b83ee1359a2854f0fcf5a00580d
SHA256

9cd370d3c02ab492bb1852f32dc1512a29e88c83bee2f75c105f03a835a0f354
SHA512

c318153a8d7a4de0cf2194a1b6548d761d649e24ce774a09de6f9bef287e582ce246e4f91ab34e1e4ec84319738661a32d290d959203e92c38e58033dd1e2243
SSDEEP

384:MyKlbccVW/QBxP4VF9d+IwB6F0pBxak4MkE2tKOBg:5UhVWoBiT9C6apBxaNtK

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

Executes dropped EXE 1 IoCs

pid	Process
232	instokk.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/628-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0007000000023201-4.dat	upx
behavioral2/memory/232-7-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/memory/628-6-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\instok.dll	2cd6efb80213b0b5a2a308448a859f9b.exe
File created	C:\Windows\SysWOW64\instokk.exe	2cd6efb80213b0b5a2a308448a859f9b.exe
File opened for modification	C:\Windows\SysWOW64\instokk.exe	2cd6efb80213b0b5a2a308448a859f9b.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 232	628	2cd6efb80213b0b5a2a308448a859f9b.exe	20
PID 628 wrote to memory of 232	628	2cd6efb80213b0b5a2a308448a859f9b.exe	20
PID 628 wrote to memory of 232	628	2cd6efb80213b0b5a2a308448a859f9b.exe	20
PID 628 wrote to memory of 5112	628	2cd6efb80213b0b5a2a308448a859f9b.exe	103
PID 628 wrote to memory of 5112	628	2cd6efb80213b0b5a2a308448a859f9b.exe	103
PID 628 wrote to memory of 5112	628	2cd6efb80213b0b5a2a308448a859f9b.exe	103

C:\Users\Admin\AppData\Local\Temp\2cd6efb80213b0b5a2a308448a859f9b.exe
"C:\Users\Admin\AppData\Local\Temp\2cd6efb80213b0b5a2a308448a859f9b.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\instokk.exe
  C:\Windows\system32\instokk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:232
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\2cd6efb80213b0b5a2a308448a859f9b.exe.bat
  2⤵
  PID:5112

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

C:\Windows\SysWOW64\instokk.exe

Filesize
12KB

MD5
2cd6efb80213b0b5a2a308448a859f9b

SHA1
edb6f03ce19f9b83ee1359a2854f0fcf5a00580d

SHA256
9cd370d3c02ab492bb1852f32dc1512a29e88c83bee2f75c105f03a835a0f354

SHA512
c318153a8d7a4de0cf2194a1b6548d761d649e24ce774a09de6f9bef287e582ce246e4f91ab34e1e4ec84319738661a32d290d959203e92c38e58033dd1e2243

Download Submit
memory/232-7-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/628-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/628-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download