expiro | e8c4f1ac44feb3f190b90be863cfe7d8ee1ad8cd903210e9b71742a7372f473a

Analysis

max time kernel
144s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17/09/2024, 10:38

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General

Target
e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe
Size 64KB
Sample240917-mphlesydml
SHA256 e8c4f1ac44feb3f190b90be863cfe7d8ee1ad8cd903210e9b71742a7372f473a
MD5 e6a2e1a2ef9081382849e59150052e0c
SHA1 ec0364ee6e6d398b3d53e50fce30422c0fdc77fd
SHA512 7a6d5b46e18d84c035219d6a06abf942f0f4d99a73df25c3c175155e57d0565efba7297a889d5af4bec7740f8aa429731e4d98669f58e57014b7782561974a00
SSDEEP 768:WE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2ZD:T+PeXonnUStQXDI4spvVp+N8NECtH33
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 7 IoCs

backdoor

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4424-9-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3268-19-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3268-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3268-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3268-27-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3268-28-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
3216	service214.exe
3268	service214.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\\service214.exe"	service214.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service214.exe"	service214.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:	service214.exe
File opened (read-only)	\??\F:	service214.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\\service214.exe"	service214.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service214.exe	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service214.exe	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3204 set thread context of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3216 set thread context of 3268	3216	service214.exe	95

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	service214.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service214.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 3204 wrote to memory of 4424	3204	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	89
PID 4424 wrote to memory of 3216	4424	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	90
PID 4424 wrote to memory of 3216	4424	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	90
PID 4424 wrote to memory of 3216	4424	e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe	90
PID 3216 wrote to memory of 3268	3216	service214.exe	95
PID 3216 wrote to memory of 3268	3216	service214.exe	95
PID 3216 wrote to memory of 3268	3216	service214.exe	95
PID 3216 wrote to memory of 3268	3216	service214.exe	95
PID 3216 wrote to memory of 3268	3216	service214.exe	95
PID 3216 wrote to memory of 3268	3216	service214.exe	95
PID 3216 wrote to memory of 3268	3216	service214.exe	95

C:\Users\Admin\AppData\Local\Temp\e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Users\Admin\AppData\Local\Temp\e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\e6a2e1a2ef9081382849e59150052e0c_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4424
- - C:\Windows\SysWOW64\service214.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3216
  - - C:\Windows\SysWOW64\service214.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:3268

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4336,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=3776 /prefetch:8
1⤵
PID:5012

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

service214.exe

Path C:\Windows\SysWOW64\service214.exe
Size 64KB
SHA256 e8c4f1ac44feb3f190b90be863cfe7d8ee1ad8cd903210e9b71742a7372f473a
MD5 e6a2e1a2ef9081382849e59150052e0c
SHA1 ec0364ee6e6d398b3d53e50fce30422c0fdc77fd
SHA512 7a6d5b46e18d84c035219d6a06abf942f0f4d99a73df25c3c175155e57d0565efba7297a889d5af4bec7740f8aa429731e4d98669f58e57014b7782561974a00
SSDEEP 768:WE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2ZD:T+PeXonnUStQXDI4spvVp+N8NECtH33
MD5 SHA1 SHA512 SSDEEP

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memory/3204-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3204-0-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3216-16-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3268-20-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3268-28-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3268-27-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3268-22-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3268-18-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3268-19-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4424-4-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4424-9-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4424-5-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4424-1-0x0000000000400000-0x000000000040B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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