4cfde17cc1ff6e167d40e9ef551c4fe5cd364140ede1086d1daf7724fb0b2796

General

Target

NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe
Size

402KB
MD5

88338b85ca1c33155443dd4d2b780740
SHA1

1f413ce635c7c958c354fd0667f632d4c0765145
SHA256

4cfde17cc1ff6e167d40e9ef551c4fe5cd364140ede1086d1daf7724fb0b2796
SHA512

05374c9b10a6de5ee63cfae371718d9ab9ef1dcac28a580f7bebcba330137c198f3abbf04ff45df7db7a4cd77cfe526c12999e5e45ee741065adc11a7376a674
SSDEEP

6144:8kLYyvZFsjpHQvXrlHyJzVJot3aERiLTwEYYxNdZ:8kLYyourOWaE0TGY

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4052	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	sysctl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	sysctl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1664-0-0x0000000000400000-0x0000000000461000-memory.dmp	upx
behavioral2/files/0x0007000000022dcb-6.dat	upx
behavioral2/files/0x0007000000022dcb-5.dat	upx
behavioral2/memory/1664-8-0x0000000000400000-0x0000000000461000-memory.dmp	upx
behavioral2/memory/4052-9-0x0000000000400000-0x0000000000461000-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"	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\sysctl.exe	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe
File created	C:\Windows\SysWOW64\realex.exe	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	NEAS.88338b85ca1c33155443dd4d2b780740_JC.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
4052	sysctl.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1664 wrote to memory of 4052	1664	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe	91
PID 1664 wrote to memory of 4052	1664	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe	91
PID 1664 wrote to memory of 4052	1664	NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe	91

C:\Users\Admin\AppData\Local\Temp\NEAS.88338b85ca1c33155443dd4d2b780740_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.88338b85ca1c33155443dd4d2b780740_JC.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:1664
- 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:4052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\sysctl.exe

Filesize
403KB

MD5
03cc4a8af5f9c93629fa1139ad303aad

SHA1
406e316971c331485b14e29b4408ebf497e0c711

SHA256
09789ff70cf91d9790b39bf2fbc349c48062bfcb95c4b9598df47d8aed6d19e3

SHA512
9ad811b7c8f5cdb3a3261f374b379980615166c26d60ab2395c7b56b0f50c13c6e7f803c4f60c96a0cb0fdbba786d331c32921e41840a6a4acd7721f1c2cb810

Download Submit
C:\Windows\SysWOW64\sysctl.exe

Filesize
403KB

MD5
03cc4a8af5f9c93629fa1139ad303aad

SHA1
406e316971c331485b14e29b4408ebf497e0c711

SHA256
09789ff70cf91d9790b39bf2fbc349c48062bfcb95c4b9598df47d8aed6d19e3

SHA512
9ad811b7c8f5cdb3a3261f374b379980615166c26d60ab2395c7b56b0f50c13c6e7f803c4f60c96a0cb0fdbba786d331c32921e41840a6a4acd7721f1c2cb810

Download Submit
memory/1664-0-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1664-1-0x0000000002210000-0x0000000002211000-memory.dmp

Filesize
4KB

Download
memory/1664-8-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/4052-7-0x00000000021D0000-0x00000000021D1000-memory.dmp

Filesize
4KB

Download
memory/4052-9-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/4052-10-0x00000000021D0000-0x00000000021D1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads