ad6130725b9c962f36e246e35c29da5b187d9ecce7eb0310a0a216edbaf9a701

General

Target
jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Size 100KB
Sample261014-c35b8seb87
SHA256 ad6130725b9c962f36e246e35c29da5b187d9ecce7eb0310a0a216edbaf9a701
MD5 49a491a78290c4079aec568e57f67cf9
SHA1 9d3cabed42be08c1982e84823f2d1bc9939b7e0e
SHA512 b0652cda6b850fdb063222aee70a7b263675883ad0fd5d736cd4aa03b21dbc5ecf3680d1a0b63f79bf15f6fd1f4e959ab4fb529da34ad45fba9c33c8762441b5
SSDEEP 3072:j/17KyfVzQDLEZpqEkQ8ytTU0IFcZcA3FJ59KL:j979w0GGtTU0IFyv/K
TLSH
T1E7A3D0E5E7D407FAC197AB7F2839FA0189A1E629013EDB41A5D0629F375B7D20E21C0D
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery persistence privilege_escalation upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 3 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	smss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	smss.exe

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4512	netsh.exe

Executes a file named after a Windows system binary 1 TTPs 3 IoCs

The file runs from a user directory while carrying the name of an executable that normally only exists in System32.

defense_evasion

Match Legitimate Name or Location

T1036.005

description	ioc	Process
File opened (read-only)	C:\Users\Admin\AppData\Roaming\smss.exe	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
File opened (read-only)	C:\Users\Admin\AppData\Roaming\smss.exe	smss.exe
File opened (read-only)	C:\Users\Admin\AppData\Roaming\smss.exe	smss.exe

Executes dropped EXE 4 IoCs

pid	Process
2564	smss.exe
5584	smss.exe
6024	smss.exe
5280	smss.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	smss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	smss.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	smss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\smss.exe\""	smss.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 5840 set thread context of 5284	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	89
PID 2564 set thread context of 5584	2564	smss.exe	94
PID 6024 set thread context of 5280	6024	smss.exe	100

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5284-2-0x0000000000400000-0x0000000000425000-memory.dmp	upx
behavioral2/memory/5284-4-0x0000000000400000-0x0000000000425000-memory.dmp	upx
behavioral2/memory/5284-5-0x0000000000400000-0x0000000000425000-memory.dmp	upx
behavioral2/memory/5284-6-0x0000000000400000-0x0000000000425000-memory.dmp	upx

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 6 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	smss.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	smss.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	smss.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	smss.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	jaffacakes118_HEUR.Trojan.Win32.Generic.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_HEUR.Trojan.Win32.Generic.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
Token: SeDebugPrivilege	2564	smss.exe
Token: SeDebugPrivilege	6024	smss.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
5284	jaffacakes118_HEUR.Trojan.Win32.Generic.exe
5584	smss.exe
5280	smss.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5840 wrote to memory of 1108	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	88
PID 5840 wrote to memory of 5284	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	89
PID 5840 wrote to memory of 5284	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	89
PID 5840 wrote to memory of 5284	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	89
PID 5840 wrote to memory of 5284	5840	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	89
PID 5284 wrote to memory of 4512	5284	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	90
PID 5284 wrote to memory of 2564	5284	jaffacakes118_HEUR.Trojan.Win32.Generic.exe	92
PID 2564 wrote to memory of 2100	2564	smss.exe	93
PID 2564 wrote to memory of 5584	2564	smss.exe	94
PID 2564 wrote to memory of 5584	2564	smss.exe	94
PID 2564 wrote to memory of 5584	2564	smss.exe	94
PID 2564 wrote to memory of 5584	2564	smss.exe	94
PID 6024 wrote to memory of 3668	6024	smss.exe	99
PID 6024 wrote to memory of 5280	6024	smss.exe	100
PID 6024 wrote to memory of 5280	6024	smss.exe	100
PID 6024 wrote to memory of 5280	6024	smss.exe	100
PID 6024 wrote to memory of 5280	6024	smss.exe	100

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_HEUR.Trojan.Win32.Generic.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_HEUR.Trojan.Win32.Generic.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5840
- C:\Users\Admin\AppData\Local\Temp\jaffacakes118_HEUR.Trojan.Win32.Generic.exe
  jaffacakes118_HEUR.Trojan.Win32.Generic.exe
  2⤵
  PID:1108
- C:\Users\Admin\AppData\Local\Temp\jaffacakes118_HEUR.Trojan.Win32.Generic.exe
  jaffacakes118_HEUR.Trojan.Win32.Generic.exe
  2⤵
  - Modifies WinLogon for persistence
  - Executes a file named after a Windows system binary
  - Adds Run key to start application
  - Reads the TCP/IP host and domain name from the registry
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5284
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\smss.exe" CityScape Enable
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:4512
- - C:\Users\Admin\AppData\Roaming\smss.exe
    /d C:\Users\Admin\AppData\Local\Temp\jaffacakes118_HEUR.Trojan.Win32.Generic.exe
    3⤵
    - Executes a file named after a Windows system binary
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2564
  - - C:\Users\Admin\AppData\Roaming\smss.exe
      smss.exe
      4⤵
      PID:2100
  - - C:\Users\Admin\AppData\Roaming\smss.exe
      smss.exe
      4⤵
      Modifies WinLogon for persistence
      Executes dropped EXE
      Adds Run key to start application
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:5584

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5868

C:\Users\Admin\AppData\Roaming\smss.exe
"C:\Users\Admin\AppData\Roaming\smss.exe"
1⤵
- Executes a file named after a Windows system binary
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:6024
- C:\Users\Admin\AppData\Roaming\smss.exe
  smss.exe
  2⤵
  PID:3668
- C:\Users\Admin\AppData\Roaming\smss.exe
  smss.exe
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Adds Run key to start application
  - Reads the TCP/IP host and domain name from the registry
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:5280

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

1

T1562.004

Masquerading

1

T1036

Match Legitimate Name or Location

Modify Registry

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

smss.exe

Path C:\Users\Admin\AppData\Roaming\smss.exe
Size 100KB
SHA256 0fe098350976d88a50cd1939078c86f1037ddb8e0db48bc2c9d717fc62798bc7
MD5 1feb3e12f9d7dab4461350af50e5f62f
SHA1 dba91d560b9fe95f2a40ad15a01b5d827263946e
SHA512 b7891f26f65ffca37dd0db3fa1e35718cc525f2011c059ddca24ded2dfe2caf0b29c299033a1c2a5ca78561cfd44e781bc9808bd8652fc25f8a2e17f5a8819a6
SSDEEP 3072:j/17KyfVzQDLEZpqEkQ8ytTU0IFcZcA3FJ59KL:j979w0GGtTU0IFyv/K
TLSH
T17DA3D0E5E7D407FAC197AB7F2839FA0189A1E629013EDB41A5D0629F375B7D20E21C0D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2564-29-0x0000000074690000-0x0000000074D3A000-memory.dmp

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memory/2564-30-0x0000000074690000-0x0000000074D3A000-memory.dmp

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memory/2564-39-0x0000000074690000-0x0000000074D3A000-memory.dmp

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memory/5284-2-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/5284-4-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/5284-5-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/5284-6-0x0000000000400000-0x0000000000425000-memory.dmp

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memory/5840-0-0x0000000001550000-0x0000000001560000-memory.dmp

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memory/5840-1-0x0000000074B72000-0x0000000074B74000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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