2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316

Analysis

max time kernel
148s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 17:50

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General

Target

2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
Size

453KB
MD5

6e78ddea5e9b567e9afc0511f6fdd0ab
SHA1

3f0cb1a90c76a12536277af1f936a14a62fcfe2a
SHA256

2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316
SHA512

f582e68ed23ba3a620174c281710bf982f48600c1b7ff42e9cb30cec26491a85f799496a3ebad708c0d5504faecbc658919f0b80d32528ac85bf81aa56ebdfbd
SSDEEP

6144:8kLYyvZFsjpHQvXrlHyJzVJot3aERiLTwEYYxNdZ:8kLYyourOWaE0TGY

Score

7^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3552	sysctl.exe

Modifies system executable filetype association 2 TTPs 4 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	sysctl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	sysctl.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5072-0-0x0000000000400000-0x0000000000461000-memory.dmp	upx
behavioral2/files/0x0010000000023153-5.dat	upx
behavioral2/memory/5072-8-0x0000000000400000-0x0000000000461000-memory.dmp	upx
behavioral2/memory/3552-9-0x0000000000400000-0x0000000000461000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\sysctl.exe = "C:\\Windows\\system32\\sysctl.exe"	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\sysctl.exe	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
File created	C:\Windows\SysWOW64\realex.exe	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	sysctl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	sysctl.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3552	sysctl.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5072 wrote to memory of 3552	5072	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe	85
PID 5072 wrote to memory of 3552	5072	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe	85
PID 5072 wrote to memory of 3552	5072	2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe	85

C:\Users\Admin\AppData\Local\Temp\2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe
"C:\Users\Admin\AppData\Local\Temp\2a8a678f8da52aaf164d6cd177ccb29693d1c1b1f32bc0de701a5ec98944a316.exe"
1⤵
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5072
- C:\Windows\SysWOW64\sysctl.exe
  C:\Windows\system32\sysctl.exe
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  PID:3552

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

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\sysctl.exe

Filesize
454KB

MD5
a1afda57c228671b7918205325b27b4b

SHA1
948b59fce2942556d7ff37f6b4801f6a5da31208

SHA256
31a887e94d5ea678e816d13c3931c671fa8fc90474dacb3af1521ed4463b42b3

SHA512
e25889c1463343255e2f4b182bcf2d567910200e33785feface66248432cccc8d09d2b618fe8eb6fb78297303dd0e0f377dcde669b3b502c3291fe478a678d6a

Download Submit
memory/3552-7-0x00000000021E0000-0x00000000021E1000-memory.dmp

Filesize
4KB

Download
memory/3552-9-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/5072-0-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/5072-3-0x0000000002200000-0x0000000002201000-memory.dmp

Filesize
4KB

Download
memory/5072-8-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads