72c0a84debc1d5f6b8777ec439733e18f3628e2e67a0f6b67b7fb6c6f7f600c0

General

Target
jaffacakes118_Trojan-Dropper.Win32.Blastit.c.exe
Size 39KB
Sample261009-v6pp3act5s
SHA256 72c0a84debc1d5f6b8777ec439733e18f3628e2e67a0f6b67b7fb6c6f7f600c0
MD5 920f8284d6cbd7792ee26eb92269b3c5
SHA1 5027f0f8eab4a46274473bc25d9ae6cc3fa073a0
SHA512 bf3b1862aad1b9523ee3aa85451bdc4d816b91ddd1d11432cee5e9d9cb18ecad3df8b5d9421fc1ac2002b5d795c638d414c44e1ab51a9d5095470fe701d4f17e
SSDEEP 768:w6QstpFVwQ/q9Wapj08qMJkaMBnsnRPVKEU38pBdaJLxfvGQVR:w6hR/qF0KCpRWk8pShxfvx
TLSH
T11503E083A7E93B66D7790B34A5AA83133C28F5744FBBC6B58B4863526C2437154DA334
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 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 svshost.exe"	system33r.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe svshost.exe"	svshost.exe

Executes dropped EXE 2 IoCs

pid	Process
4732	system33r.exe
1696	svshost.exe

Adds Run key to start application 2 TTPs 4 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\Microsoft Network Export = "svshost.exe"	svshost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\Microsoft Network Export = "svshost.exe"	svshost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Microsoft Network Export = "svshost.exe"	system33r.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\Microsoft Network Export = "svshost.exe"	system33r.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Drops file in System32 directory 22 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe	system33r.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File opened for modification	C:\Windows\SysWOW64\svshost.exe	system33r.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe
File created	C:\Windows\SysWOW64\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe\svshost.exe	svshost.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e00000001c481-5.dat	upx
behavioral2/memory/4732-6-0x0000000000400000-0x000000000042A000-memory.dmp	upx
behavioral2/memory/4732-10-0x0000000000400000-0x000000000042A000-memory.dmp	upx
behavioral2/memory/1696-12-0x0000000000400000-0x000000000042A000-memory.dmp	upx

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
3948	1696	WerFault.exe	91
2624	1696	WerFault.exe	91

System Location Discovery: System Language Discovery 1 TTPs 4 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	jaffacakes118_Trojan-Dropper.Win32.Blastit.c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	system33r.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svshost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4732	system33r.exe
4732	system33r.exe
1696	svshost.exe
1696	svshost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4732	system33r.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4864	jaffacakes118_Trojan-Dropper.Win32.Blastit.c.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 4732	4864	jaffacakes118_Trojan-Dropper.Win32.Blastit.c.exe	89
PID 4732 wrote to memory of 1696	4732	system33r.exe	91
PID 4732 wrote to memory of 2380	4732	system33r.exe	92

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Blastit.c.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Blastit.c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\system33r.exe
  C:\Users\Admin\AppData\Local\Temp\system33r.exe
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4732
- - C:\Windows\SysWOW64\svshost.exe
    C:\Windows\system32\svshost.exe
    3⤵
    - Modifies WinLogon for persistence
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1696
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 1156
      4⤵
      Program crash
      PID:3948
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 1164
      4⤵
      Program crash
      PID:2624
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\SYSTEM~1.EXE > nul
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1696 -ip 1696
1⤵
PID:896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1696 -ip 1696
1⤵
PID:1076

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

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Indicator Removal

1

T1070

File Deletion

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

system33r.exe

Path C:\Users\Admin\AppData\Local\Temp\system33r.exe
Size 20KB
SHA256 36ca972ee7f89e202563fee25f332c9a8c948ac936b9f9abe464a90ff02f9a05
MD5 773560dabdf66020cfb0455c1c9bc39e
SHA1 d95a8696dd52c70a3076c573e60c2d3d4a905c05
SHA512 b824dd1fffd3440307662ac512b1a83176fac27d587dd123c9ac247015aedb4ad77a025a42911e46a5fa3e3dd02c32fd5d13ea2e60970fdf224bfafde58c7f1d
SSDEEP 384:CUM6wZVtoD5gOez2xpkUbKowQLTxI9hMVlepLv0UHqMJOrfavH:E6QstpFVwQ/q9Wapj08qMJkaf
TLSH
T1CD92C043A7EE1B7BC359173A69D842733C7462741B3A94B4CF595EA3503E33714CA628
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1696-12-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/4732-6-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/4732-10-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/4864-11-0x0000000000400000-0x0000000000420000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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