expiro | 9066a8375ef83eb2fb4e977917fe150250412faea5b10b3267c61a4f2d5c0679

Analysis

max time kernel
145s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
03/07/2024, 18:18

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe
Size 124KB
Sample240703-wx49tstbrd
SHA256 9066a8375ef83eb2fb4e977917fe150250412faea5b10b3267c61a4f2d5c0679
MD5 235019b4ee560a00b85f128c6b8102b3
SHA1 2093971ea88258c610431cc4b05ce666730c858a
SHA512 9d9c5da0765a00f6cb0f3f899b4d04e803fa58b9c84b61668b885b80be3b9cf8e05088c700629f8510e64ccfec0fe4d939f2eb15ff81e8673c3ba5d19f2d808f
SSDEEP 768:lE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2Zv:y+PeXonnUStQXDI4spvVp+N8NECtH3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

expiro backdoor persistence

Malware Config

Signatures

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

Expiro payload 7 IoCs

backdoor

resource	yara_rule
behavioral2/memory/3204-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3204-6-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1400-21-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1400-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1400-24-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1400-25-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1400-30-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
464	service132.exe
1400	service132.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-1-5-21-2080292272-204036150-2159171770-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service132.exe"	service132.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service132.exe"	service132.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:	service132.exe
File opened (read-only)	\??\F:	service132.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\\service132.exe"	service132.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service132.exe	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service132.exe	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3492 set thread context of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 464 set thread context of 1400	464	service132.exe	90

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3492 wrote to memory of 3204	3492	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	86
PID 3204 wrote to memory of 464	3204	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	87
PID 3204 wrote to memory of 464	3204	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	87
PID 3204 wrote to memory of 464	3204	235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe	87
PID 464 wrote to memory of 1400	464	service132.exe	90
PID 464 wrote to memory of 1400	464	service132.exe	90
PID 464 wrote to memory of 1400	464	service132.exe	90
PID 464 wrote to memory of 1400	464	service132.exe	90
PID 464 wrote to memory of 1400	464	service132.exe	90
PID 464 wrote to memory of 1400	464	service132.exe	90
PID 464 wrote to memory of 1400	464	service132.exe	90

C:\Users\Admin\AppData\Local\Temp\235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Users\Admin\AppData\Local\Temp\235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\235019b4ee560a00b85f128c6b8102b3_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:3204
- - C:\Windows\SysWOW64\service132.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:464
  - - C:\Windows\SysWOW64\service132.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      PID:1400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

service132.exe

Path C:\Windows\SysWOW64\service132.exe
Size 124KB
SHA256 9066a8375ef83eb2fb4e977917fe150250412faea5b10b3267c61a4f2d5c0679
MD5 235019b4ee560a00b85f128c6b8102b3
SHA1 2093971ea88258c610431cc4b05ce666730c858a
SHA512 9d9c5da0765a00f6cb0f3f899b4d04e803fa58b9c84b61668b885b80be3b9cf8e05088c700629f8510e64ccfec0fe4d939f2eb15ff81e8673c3ba5d19f2d808f
SSDEEP 768:lE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2Zv:y+PeXonnUStQXDI4spvVp+N8NECtH3
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/464-18-0x0000000000400000-0x0000000000428000-memory.dmp

Download

memory/464-15-0x0000000000400000-0x0000000000428000-memory.dmp

Download

memory/1400-21-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/1400-22-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/1400-20-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/1400-24-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/1400-25-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/1400-30-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/3204-5-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/3204-6-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/3204-4-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/3204-1-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/3492-3-0x0000000000400000-0x0000000000428000-memory.dmp

Download

memory/3492-0-0x0000000000400000-0x0000000000428000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads