expiro | bcaba654fcc2ff4b9c11f18f55c0706d597a187af52cdbcfedc4663eed325bcf

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16/08/2024, 01:12

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General

Target
9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe
Size 96KB
Sample240816-bkkpfa1dpm
SHA256 bcaba654fcc2ff4b9c11f18f55c0706d597a187af52cdbcfedc4663eed325bcf
MD5 9c60050be032e881ba8da2e3fe80158b
SHA1 9cb51c722d2507999d315237762cc1542923d303
SHA512 8b784df150fc2f6ecf66505f077a5c027c01c699e0f9a8fafab92220ebb944464633d2db3b5e3198be4d6bfa4350306b8744559fab6823aea18a18fc09a83309
SSDEEP 768:HXzB2X7m2PX2uC3P1UtyzlJsEqDlEVBRDKwsB9nMZnANQ1N/4U7rYxamg46MVp:HDZ2PX2uCUtb9DlkBRDPsBcs0WpgX6
MD5 SHA1 SHA512 SSDEEP

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/5868-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/5868-10-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3540-19-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3540-21-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3540-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3540-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3540-27-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3540-35-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
5812	service151.exe
3540	service151.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\\service151.exe"	service151.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\\service151.exe"	service151.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:	service151.exe
File opened (read-only)	\??\F:	service151.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\\service151.exe"	service151.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service151.exe	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service151.exe	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 6128 set thread context of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 5812 set thread context of 3540	5812	service151.exe	96

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	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service151.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service151.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 6128 wrote to memory of 5868	6128	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	92
PID 5868 wrote to memory of 5812	5868	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	93
PID 5868 wrote to memory of 5812	5868	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	93
PID 5868 wrote to memory of 5812	5868	9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe	93
PID 5812 wrote to memory of 3540	5812	service151.exe	96
PID 5812 wrote to memory of 3540	5812	service151.exe	96
PID 5812 wrote to memory of 3540	5812	service151.exe	96
PID 5812 wrote to memory of 3540	5812	service151.exe	96
PID 5812 wrote to memory of 3540	5812	service151.exe	96
PID 5812 wrote to memory of 3540	5812	service151.exe	96
PID 5812 wrote to memory of 3540	5812	service151.exe	96

C:\Users\Admin\AppData\Local\Temp\9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6128
- C:\Users\Admin\AppData\Local\Temp\9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\9c60050be032e881ba8da2e3fe80158b_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5868
- - C:\Windows\SysWOW64\service151.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5812
  - - C:\Windows\SysWOW64\service151.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:3540

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

service151.exe

Path C:\Windows\SysWOW64\service151.exe
Size 96KB
SHA256 bcaba654fcc2ff4b9c11f18f55c0706d597a187af52cdbcfedc4663eed325bcf
MD5 9c60050be032e881ba8da2e3fe80158b
SHA1 9cb51c722d2507999d315237762cc1542923d303
SHA512 8b784df150fc2f6ecf66505f077a5c027c01c699e0f9a8fafab92220ebb944464633d2db3b5e3198be4d6bfa4350306b8744559fab6823aea18a18fc09a83309
SSDEEP 768:HXzB2X7m2PX2uC3P1UtyzlJsEqDlEVBRDKwsB9nMZnANQ1N/4U7rYxamg46MVp:HDZ2PX2uCUtb9DlkBRDPsBcs0WpgX6
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3540-19-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3540-35-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3540-27-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3540-22-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3540-20-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3540-21-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3540-18-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/5812-16-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/5868-4-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/5868-10-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/5868-5-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/5868-1-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/6128-0-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/6128-3-0x0000000000400000-0x000000000042A000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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