e4bfa4b1227e615c8869d781fe0d663d173c797bb91e5804fc06b38485cf3839

General

Target

2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
Size

42KB
MD5

2bc387a8d3c6574db3a74fd0e757545b
SHA1

deb8991b8ff5e2ae5daffa2d97525affcbc006f9
SHA256

e4bfa4b1227e615c8869d781fe0d663d173c797bb91e5804fc06b38485cf3839
SHA512

c91be20c0197ed7807a3cc6db019d23bd6122e36ce9175626438d9596d2f476ff11b6007d49e7cc558d8abd5eb0aa4f9c9582190ab318bb3b54f8b564dc6c74a
SSDEEP

768:HBCmFxJuAhfNUK0cLlF+jqPLkqZWaKZ9e7z913lqYrZUC9N660oi:hL5f30aF++LZWa0Uz73UsUm0

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2708	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2752	rundll32.exe
2752	rundll32.exe

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/files/0x00070000000186de-23.dat	vmprotect

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"	rundll32.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\sfcos.dll	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\sfcos.dll	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\systemp	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2748-6-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2748-21-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Drops file in Program Files directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Saturday	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File created	C:\Program Files\Monday.ime	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File created	C:\Program Files\Tuesday.ime	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File created	C:\Program Files\Wednesday.ime	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File created	C:\Program Files\Sunday.ime	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
File created	C:\Program Files\taskmgr.upx	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2888	2752	WerFault.exe	35

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	sfc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2752	rundll32.exe
2752	rundll32.exe
2752	rundll32.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 2660	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	31
PID 2748 wrote to memory of 2660	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	31
PID 2748 wrote to memory of 2660	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	31
PID 2748 wrote to memory of 2660	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	31
PID 2748 wrote to memory of 2708	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	32
PID 2748 wrote to memory of 2708	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	32
PID 2748 wrote to memory of 2708	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	32
PID 2748 wrote to memory of 2708	2748	2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe	32
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2708 wrote to memory of 2752	2708	cmd.exe	35
PID 2752 wrote to memory of 2888	2752	rundll32.exe	36
PID 2752 wrote to memory of 2888	2752	rundll32.exe	36
PID 2752 wrote to memory of 2888	2752	rundll32.exe	36
PID 2752 wrote to memory of 2888	2752	rundll32.exe	36

C:\Users\Admin\AppData\Local\Temp\2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2bc387a8d3c6574db3a74fd0e757545b_JaffaCakes118.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Windows\SysWOW64\sfc.exe
  "C:\Windows\system32\sfc.exe" /REVERT
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2660
- C:\Windows\SysWOW64\cmd.exe
  cmd /c c:\del.bat
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe "C:\Program Files\Monday.ime",Runed
    3⤵
    - Loads dropped DLL
    - Modifies WinLogon
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2752 -s 256
      4⤵
      Program crash
      PID:2888

Network

MITRE ATT&CK Enterprise v15

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 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

C:\Program Files\Monday.ime

Filesize
23KB

MD5
8399229905d63bdc185adbc1a88c9616

SHA1
d0b4af3cc18c3c6895794710a40f5a77086e8924

SHA256
2f34e5a074ec267e8522c1d5ae8fd5cb805218bbce4e2b8fd697eb51e4636865

SHA512
2b072f3695527e7c5cc8d7a1d85286cfb77d686526daca47e710114f1645c15bd2e6e140c3744278e5a92d6678627ccfddbcce48b1ab3b010cb97b66abf04a02

Download Submit
C:\Program Files\Saturday

Filesize
70B

MD5
caa555f2383857e231ba5f74ebbce0a7

SHA1
f98a9a0564aa0dddce8dd421d6ce2558d3ce1192

SHA256
0ff5d73687864cb762d58f5138cba9e506276a31f2bcc02705f3f35006152fa0

SHA512
7903e539f810565dcd411509d22226b7fc0082504e736164068360c30b3a18fbcabc7605288130b5e68f44e6afb9073541076cf0766433226dfb89b3cee6f60d

Download Submit
C:\Windows\SysWOW64\sfcos.dll

Filesize
40KB

MD5
84799328d87b3091a3bdd251e1ad31f9

SHA1
64dbbe8210049f4d762de22525a7fe4313bf99d0

SHA256
f85521215924388830dbb13580688db70b46af4c7d82d549d09086438f8d237b

SHA512
0a9401c9c687f0edca01258c7920596408934caa21e5392dbaefc222c5c021255a40ec7c114a805cdb7f5a6153ec9fa9592edcc9e45406ce5612aa4e3da6a2c4

Download Submit
C:\Windows\SysWOW64\systemp

Filesize
4KB

MD5
1bc38d164c166eda1e6095a07ad25c1e

SHA1
e638bf29cd0579e6a7170eb18194879b01a21086

SHA256
cf449c0f6af9dcf832804aa2a66f12531ecfbaf89f5789ce0bdcb946aafd06d5

SHA512
1b6ac09e42ad1922d589ca1b4cf6bfca5652e8bab9f381ef982ee30e7e9192d426446f1538380dd152ba9ecb9a1b2e5d74e0082ad943dfcf662eb5a4744c9752

Download Submit
C:\del.bat

Filesize
270B

MD5
b7d6eb4a179396310db90c402a577fd5

SHA1
c1236c9ed58afef128e0163b7a8153a4bcfd09d0

SHA256
66ddf91b5503f0c9063d51a3499cfee1964e2dc4540941c6948c23da9e8bb22c

SHA512
7a4e7d44b27494fc647da0abb0d8d8f6a374b72862572a93b2e07235fed003af4597dcc566ac58d6785ca606a3c4a99c215a3c4f00399b20d3dbba2bb6a6ddcf

Download Submit
memory/2748-6-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2748-21-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads