expiro | d4c492cb069488d266ce73424cbe477c656818ef3eacd5bf8c21a7d302c5acd7

General

Target

13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe
Size

184KB
MD5

13531879c9d7fd96b66c4dc6aaef946f
SHA1

0ae9fd693808a42caf6f246fb2f57bcd4d44746a
SHA256

d4c492cb069488d266ce73424cbe477c656818ef3eacd5bf8c21a7d302c5acd7
SHA512

91596fa57ca2945ec1caedccc07e3a5ba774898efa333ac33cd032a2773cb6c50abd42f9a0648bc7684956ab5ea2dada81329ea201b1fb895ae4e3c537bc732f
SSDEEP

768:8kWXT7zWf69DQcvi1LcO8UoPIj4X9gqm+3lRf03NDKgj6+58nIWFgc:pzf69DQH1CUowj4X9tm+3le3dl59gz

Score

10^/10

expiro backdoor discovery persistence

Malware Config

Signatures

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

Expiro payload 8 IoCs

backdoor

resource	yara_rule
behavioral2/memory/2500-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/2500-9-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1156-19-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1156-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1156-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1156-27-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1156-34-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1156-35-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
3520	service124.exe
1156	service124.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service124.exe"	service124.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service124.exe"	service124.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:	service124.exe
File opened (read-only)	\??\F:	service124.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\\service124.exe"	service124.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service124.exe	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service124.exe	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3428 set thread context of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3520 set thread context of 1156	3520	service124.exe	84

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	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service124.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service124.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 3428 wrote to memory of 2500	3428	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	82
PID 2500 wrote to memory of 3520	2500	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	83
PID 2500 wrote to memory of 3520	2500	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	83
PID 2500 wrote to memory of 3520	2500	13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe	83
PID 3520 wrote to memory of 1156	3520	service124.exe	84
PID 3520 wrote to memory of 1156	3520	service124.exe	84
PID 3520 wrote to memory of 1156	3520	service124.exe	84
PID 3520 wrote to memory of 1156	3520	service124.exe	84
PID 3520 wrote to memory of 1156	3520	service124.exe	84
PID 3520 wrote to memory of 1156	3520	service124.exe	84
PID 3520 wrote to memory of 1156	3520	service124.exe	84

C:\Users\Admin\AppData\Local\Temp\13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Users\Admin\AppData\Local\Temp\13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\13531879c9d7fd96b66c4dc6aaef946f_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2500
- - C:\Windows\SysWOW64\service124.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3520
  - - C:\Windows\SysWOW64\service124.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:1156

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

C:\Windows\SysWOW64\service124.exe

Filesize
184KB

MD5
13531879c9d7fd96b66c4dc6aaef946f

SHA1
0ae9fd693808a42caf6f246fb2f57bcd4d44746a

SHA256
d4c492cb069488d266ce73424cbe477c656818ef3eacd5bf8c21a7d302c5acd7

SHA512
91596fa57ca2945ec1caedccc07e3a5ba774898efa333ac33cd032a2773cb6c50abd42f9a0648bc7684956ab5ea2dada81329ea201b1fb895ae4e3c537bc732f

Download Submit
memory/1156-18-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1156-35-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1156-34-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1156-27-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1156-22-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1156-20-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1156-19-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3428-0-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/3428-4-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/3520-16-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads