fbf826265e7f0a4d6b3db01f4ff96b30183e93bab1d6226df01b1becdddf70eb

General

Target

a9e4ef6504c168c3834bb554ddbaf8f0N.exe
Size

372KB
MD5

a9e4ef6504c168c3834bb554ddbaf8f0
SHA1

57047ef52fa004baa8d4245311c3212a2ffd0964
SHA256

fbf826265e7f0a4d6b3db01f4ff96b30183e93bab1d6226df01b1becdddf70eb
SHA512

14aaf09d234e2bba07330b4a700ee9b7dc4facf616dccf4390f574dfcd06949b1aec12d45e9c7ae8718d1512250d9589e5ee58e4c755816aebcdb21807126c6a
SSDEEP

6144:BkLYyvZFsjpHQvXrlHyJzVJot3aERiLTwEYYs1Z:BkLYyourOWaE0TGY

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2832	sysctl.exe

Loads dropped DLL 5 IoCs

pid	Process
2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe
2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe
2240	WerFault.exe
2240	WerFault.exe
2240	WerFault.exe

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	a9e4ef6504c168c3834bb554ddbaf8f0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	a9e4ef6504c168c3834bb554ddbaf8f0N.exe

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"	a9e4ef6504c168c3834bb554ddbaf8f0N.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\realex.exe	a9e4ef6504c168c3834bb554ddbaf8f0N.exe
File created	C:\Windows\SysWOW64\sysctl.exe	a9e4ef6504c168c3834bb554ddbaf8f0N.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2240	2832	WerFault.exe	30
3024	2688	WerFault.exe	29

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a9e4ef6504c168c3834bb554ddbaf8f0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sysctl.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	a9e4ef6504c168c3834bb554ddbaf8f0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\realex.exe \"%1\" %*"	a9e4ef6504c168c3834bb554ddbaf8f0N.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2832	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	30
PID 2688 wrote to memory of 2832	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	30
PID 2688 wrote to memory of 2832	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	30
PID 2688 wrote to memory of 2832	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	30
PID 2832 wrote to memory of 2240	2832	sysctl.exe	31
PID 2832 wrote to memory of 2240	2832	sysctl.exe	31
PID 2832 wrote to memory of 2240	2832	sysctl.exe	31
PID 2832 wrote to memory of 2240	2832	sysctl.exe	31
PID 2688 wrote to memory of 3024	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	32
PID 2688 wrote to memory of 3024	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	32
PID 2688 wrote to memory of 3024	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	32
PID 2688 wrote to memory of 3024	2688	a9e4ef6504c168c3834bb554ddbaf8f0N.exe	32

C:\Users\Admin\AppData\Local\Temp\a9e4ef6504c168c3834bb554ddbaf8f0N.exe
"C:\Users\Admin\AppData\Local\Temp\a9e4ef6504c168c3834bb554ddbaf8f0N.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Windows\SysWOW64\sysctl.exe
  C:\Windows\system32\sysctl.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2832 -s 184
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2688 -s 192
  2⤵
  - Program crash
  PID:3024

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\sysctl.exe

Filesize
373KB

MD5
85e113f768612bb207ce07add5a50a72

SHA1
edf10c7691aea1fae93574dab6ba45329962b7ce

SHA256
2b28e67b3462474ada96bc522fc466f9c81b27360b861a16d76d981c66b7a02b

SHA512
7b3533dfaf035997c23cd4358ed7bedc0850b24d4965c1dcc4ad9696588d257de412cdc473c0116162d772f8936a5b1f678432f949a758395f58632473086e58

Download Submit
memory/2688-2-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2688-14-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2688-18-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2832-10-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2832-15-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads