b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374

General

Target
jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe
Size 24KB
Sample260925-2lr31saa83
SHA256 b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374
MD5 08b3fd8eae5dacded9c5e0877e7d8a38
SHA1 db25e62c1666655ad3217249dbab47bf0cff2b15
SHA512 45c93391ed8772e2005d426c6ef931b887ea79bee5c7911057f792713d48c2d4e2579cc8c2e8835e4ba75110ce073b6a60f2c0a52aad10beb29c42baa4ee28b5
SSDEEP 192:/MUJ6PYc7uhg+Xs7m8fCtGoh5L9/X8QsRjb/0L+I3O/6cc7kgUw90onn:/HJuBv+Xs7mwudxX8HjD0CI3OL5
TLSH
T1BEB29ECB6F9ABCF4E36281395185458306073030036FD58E3BA7897685A63A3693EA97
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
5308	myInsDll.exe

Loads dropped DLL 2 IoCs

pid	Process
5308	myInsDll.exe
5308	myInsDll.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\SfcDisable = "4294967197"	myInsDll.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\sfc_my.dll	myInsDll.exe
File created	C:\Windows\SysWOW64\Nmiam.nls	jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe
File created	C:\Windows\SysWOW64\Tnaamsv.dll	jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe
File created	C:\Windows\SysWOW64\myInsDll.exe	jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4988	5308	WerFault.exe	90

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	jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	myInsDll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sfc.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5308	myInsDll.exe
5308	myInsDll.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 5308	960	jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe	90
PID 5308 wrote to memory of 4016	5308	myInsDll.exe	91

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:960
- C:\Windows\SysWOW64\myInsDll.exe
  C:\Windows\system32\myInsDll.exe Tnaamsv.dll,dllDeleteFile C:\Users\Admin\AppData\Local\Temp\jaffacakes118_b881b65198c31b6e354b87aab9f205ae883877d5cd49c9769ab3d6ffce51d374.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies WinLogon
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5308
- - C:\Windows\SysWOW64\sfc.exe
    "C:\Windows\system32\sfc.exe" /REVERT
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4016
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5308 -s 1216
    3⤵
    - Program crash
    PID:4988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5308 -ip 5308
1⤵
PID:1220

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:2796

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

1

T1112

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

Replay Monitor

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Downloads

Tnaamsv.dll

Path C:\Windows\SysWOW64\Tnaamsv.dll
Size 7KB
SHA256 682e8f1b00942f684a0f2d8ef1cd8a7958603b81a39420d35142feff9eb72591
MD5 f2de245378b45fef3f4e3a906c53b805
SHA1 12b65c59444de7f571a53221a51e539cd047c863
SHA512 5980a1a5940b32d5c207749d9148f27aa94b744af5beccddd396672731702e5bb987c69328da38f04ab7a2eaa694106288b05ddaa2ed63fc0cfce95ff2b5ccde
SSDEEP 192:s7m8fCtGoh5L9/X8QsRjb/0L+I3O/6cc7kgUw90A:s7mwudxX8HjD0CI3OL5A
TLSH
T1D9F18E88AEC7EDA4E172C03DD3486613190768300B6ED8007168DE3649D67D6B62FADB
MD5 SHA1 SHA512 SSDEEP TLSH

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myInsDll.exe

Path C:\Windows\SysWOW64\myInsDll.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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sfc_my.dll

Path C:\Windows\SysWOW64\sfc_my.dll
Size 20KB
SHA256 17fba410831c77a2cb36282454cb5b60ca56639e40add124a211e4d8c1f5028d
MD5 16153d3321d5ae42238304b30a367537
SHA1 0a7ee7b3464f6ea2aed2575959b613ac63844919
SHA512 60d38b5593822d7d574b4164d1330af24ed630c75f3061128ba9f54a029ea896ae6ae8f16af764d086c4f38195227b6f69b2f012aacbe66e33b0a35a28758d39
SSDEEP 384:h4WKi+1MvBbXSwWa0TINWe8WL0DBRJz7nR9z29:pKY5WLITt01Pzt9zo
TLSH
T1F5926E92E7280952EDDA6970219CF9573E3C5FD10B0050E79DD6E9941C663C2EE307BE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5308-5-0x0000000010000000-0x0000000010107000-memory.dmp

Download

memory/5308-7-0x0000000010000000-0x0000000010107000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads