3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41

General

Target
3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41.exe
Size 598KB
Sample260803-rdxy7a1frd
SHA256 3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41
MD5 d32126bbc1939a0fdb9b26ea6b6718a9
SHA1 76cf9039dde48e77d2c325a8becfa396d278e807
SHA512 eca8647d471e8e92b4be8863b4cadb8a4635d3b67c33515df41903345e60f2264785e342073e2db379ef11f91b32d0792024830f070732a2618a133978d2c3f3
SSDEEP 12288:zJ8kRV8U9frYgftcr1R2ydMQE5LJhNbeeE7xoD46mJvC7Q70xarj/tn:iGvrYwtcr1R2ydMQULhbeeE7xoD46mJ1
TLSH
T117D48E26F39184B2D037293D8C1B62F8999D7EA12D196C463AE83D4D5F393D03D2A397
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery persistence

Malware Config

Signatures

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	ttry.exe

Executes dropped EXE 2 IoCs

pid	Process
4672	tsay.exe
1712	ttry.exe

Adds Run key to start application 2 TTPs 3 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\RunOnce\msfsa = "C:\\windows\\tsay.exe"	3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\msfsa = "C:\\windows\\tsay.exe"	tsay.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\msfsa = "C:\\windows\\tsay.exe"	ttry.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\windows\tsay.exe	3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41.exe
File created	C:\windows\tsay.exe	tsay.exe
File created	C:\windows\ttry.exe	tsay.exe
File created	C:\windows\tsay.exe	ttry.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4108	5948	WerFault.exe	88
2752	4672	WerFault.exe	93

System Location Discovery: System Language Discovery 1 TTPs 3 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	3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tsay.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ttry.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4672 wrote to memory of 1712	4672	tsay.exe	94

C:\Users\Admin\AppData\Local\Temp\3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41.exe
"C:\Users\Admin\AppData\Local\Temp\3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
PID:5948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5948 -s 484
  2⤵
  - Program crash
  PID:4108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5948 -ip 5948
1⤵
PID:4444

C:\windows\tsay.exe
C:\windows\tsay.exe
1⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4672
- C:\windows\ttry.exe
  "C:\windows\ttry.exe"
  2⤵
  - Modifies visibility of file extensions in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  PID:1712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 488
  2⤵
  - Program crash
  PID:2752

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4672 -ip 4672
1⤵
PID:2044

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Hide Artifacts

1

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tsay.exe

Path C:\Windows\tsay.exe
Size 598KB
SHA256 3615fce5ad0456b99444f99cc11fd5e56a4d64f65f0ec429ffb6ee1e44585c41
MD5 d32126bbc1939a0fdb9b26ea6b6718a9
SHA1 76cf9039dde48e77d2c325a8becfa396d278e807
SHA512 eca8647d471e8e92b4be8863b4cadb8a4635d3b67c33515df41903345e60f2264785e342073e2db379ef11f91b32d0792024830f070732a2618a133978d2c3f3
SSDEEP 12288:zJ8kRV8U9frYgftcr1R2ydMQE5LJhNbeeE7xoD46mJvC7Q70xarj/tn:iGvrYwtcr1R2ydMQULhbeeE7xoD46mJ1
TLSH
T117D48E26F39184B2D037293D8C1B62F8999D7EA12D196C463AE83D4D5F393D03D2A397
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1712-6-0x0000000000400000-0x000000000049C000-memory.dmp

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memory/1712-7-0x0000000000400000-0x000000000049C000-memory.dmp

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memory/1712-12-0x0000000000400000-0x000000000049C000-memory.dmp

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memory/4672-4-0x0000000000400000-0x000000000049C000-memory.dmp

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memory/4672-9-0x0000000000400000-0x000000000049C000-memory.dmp

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memory/5948-0-0x0000000000400000-0x000000000049C000-memory.dmp

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memory/5948-2-0x0000000000453000-0x0000000000454000-memory.dmp

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memory/5948-1-0x00000000007D0000-0x00000000007D1000-memory.dmp

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memory/5948-8-0x0000000000400000-0x000000000049C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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