24429284f7ac23a82ac1ea9ded420f13d13a2cd2697a334f89583b2f42e96b88

General

Target

a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe
Size

16KB
MD5

a29326856df1c7dacd38b1ebcacadd45
SHA1

80ac1086dc3e22d35daebf7a2403b7719e5bebc4
SHA256

24429284f7ac23a82ac1ea9ded420f13d13a2cd2697a334f89583b2f42e96b88
SHA512

644a547831694d8e580f2b53fab3c2805d053706669ad27176b08a9ba3701746075ac75b704a73d2649bfbe630378985d5758ec6049523bf474b8e464a2b7af6
SSDEEP

384:pKDPD7dq047IZo3hbaSTsxLvVTzd/jlPVOFZSbEmgmi:E7dq0z63sXPVSSIP

Score

8^/10

discovery persistence privilege_escalation upx

Malware Config

Signatures

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Deletes itself 1 IoCs

pid	Process
2620	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2456	lenyunsk.exe

Loads dropped DLL 2 IoCs

pid	Process
760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe
760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/760-0-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/files/0x0008000000018b62-3.dat	upx
behavioral1/memory/2456-12-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/760-13-0x0000000000400000-0x000000000040F000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\lenyunsk.exe	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\lenyuns.dll	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\lenyunsk.exe	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 2456	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	29
PID 760 wrote to memory of 2456	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	29
PID 760 wrote to memory of 2456	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	29
PID 760 wrote to memory of 2456	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	29
PID 760 wrote to memory of 2620	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	30
PID 760 wrote to memory of 2620	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	30
PID 760 wrote to memory of 2620	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	30
PID 760 wrote to memory of 2620	760	a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:760
- C:\Windows\SysWOW64\lenyunsk.exe
  C:\Windows\system32\lenyunsk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2456
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe.bat
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

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:\Users\Admin\AppData\Local\Temp\a29326856df1c7dacd38b1ebcacadd45_JaffaCakes118.exe.bat

Filesize
210B

MD5
84f9776d65d7d1d5604813d6849f6483

SHA1
6acadb0a7a5a8fdd3958da2f2198abfb94c4a6cc

SHA256
b658f6817b2198e06387196b0e6d93cf1036538f33fb66c10f06eee8ef890277

SHA512
fce2e73151e9445f9ceb0f489d7c0daf5dc339f26a9dad6bf7545cc216e0121e841b5ad91ec02e0acd62f398cae7ebcd460486893b6c37705f7bbe09560609b3

Download Submit
\Windows\SysWOW64\lenyunsk.exe

Filesize
16KB

MD5
a29326856df1c7dacd38b1ebcacadd45

SHA1
80ac1086dc3e22d35daebf7a2403b7719e5bebc4

SHA256
24429284f7ac23a82ac1ea9ded420f13d13a2cd2697a334f89583b2f42e96b88

SHA512
644a547831694d8e580f2b53fab3c2805d053706669ad27176b08a9ba3701746075ac75b704a73d2649bfbe630378985d5758ec6049523bf474b8e464a2b7af6

Download Submit
memory/760-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/760-5-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download
memory/760-10-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download
memory/760-13-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/760-14-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download
memory/760-15-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download
memory/2456-12-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download

Analysis

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