expiro | 05976b358f2f8f77b99d63fee8fe2790465a8227d3064f1146900b21f757f398

General

Target

JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe
Size

192KB
MD5

0c007f48b7bb87fce5a3de48a411eee7
SHA1

801ccb796e281e0f773c7fa242a97d7b89723333
SHA256

05976b358f2f8f77b99d63fee8fe2790465a8227d3064f1146900b21f757f398
SHA512

d863ed50689639095a9288617a1db0c4daeae12119fac77794244212993c2dfeb9b3f3320470045b4e53d0ad66800e63d64a7e111f123a11f163cd343ef23236
SSDEEP

1536:e+PeXonnUStQXDI4spvVp+N8NECtH3xFrtzsP6J8BlG7z3WEBr:eFgnUStM0BFn+N8FhFreyUEB

Score

10^/10

expiro backdoor discovery persistence

Malware Config

Signatures

Expiro family
expiro
Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 6 IoCs

backdoor

resource	yara_rule
behavioral1/memory/2892-13-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2892-25-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2836-42-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2836-41-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2836-44-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2836-48-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
2364	service112.exe
2836	service112.exe

Loads dropped DLL 2 IoCs

pid	Process
2892	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe
2892	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service112.exe"	service112.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service112.exe"	service112.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	service112.exe
File opened (read-only)	\??\F:	service112.exe

Modifies WinLogon 2 TTPs 1 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\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service112.exe"	service112.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service112.exe	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe
File created	C:\Windows\SysWOW64\service112.exe	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2816 set thread context of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2364 set thread context of 2836	2364	service112.exe	32

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_0c007f48b7bb87fce5a3de48a411eee7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service112.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service112.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2816 wrote to memory of 2892	2816	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	30
PID 2892 wrote to memory of 2364	2892	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	31
PID 2892 wrote to memory of 2364	2892	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	31
PID 2892 wrote to memory of 2364	2892	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	31
PID 2892 wrote to memory of 2364	2892	JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe	31
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32
PID 2364 wrote to memory of 2836	2364	service112.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0c007f48b7bb87fce5a3de48a411eee7.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Windows\SysWOW64\service112.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2364
  - - C:\Windows\SysWOW64\service112.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:2836

Network

MITRE ATT&CK Enterprise v15

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

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

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

\Windows\SysWOW64\service112.exe

Filesize
192KB

MD5
0c007f48b7bb87fce5a3de48a411eee7

SHA1
801ccb796e281e0f773c7fa242a97d7b89723333

SHA256
05976b358f2f8f77b99d63fee8fe2790465a8227d3064f1146900b21f757f398

SHA512
d863ed50689639095a9288617a1db0c4daeae12119fac77794244212993c2dfeb9b3f3320470045b4e53d0ad66800e63d64a7e111f123a11f163cd343ef23236

Download Submit
memory/2364-39-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2816-11-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2816-0-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2836-48-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2836-44-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2836-41-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2836-42-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-25-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-12-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2892-51-0x0000000000270000-0x00000000002B2000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads