expiro | 89b61ea59172d4fed5b4e329cf65ee09fbe81936f1d57bf5e65e9bca9f8c790a

General

Target

74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe
Size

172KB
MD5

74a699c69e74e876ce5bd3df4adf0d64
SHA1

7ce2fbee6a78f5b4308f683c630aa497f7d10b19
SHA256

89b61ea59172d4fed5b4e329cf65ee09fbe81936f1d57bf5e65e9bca9f8c790a
SHA512

2072e87796abcdb70582e910bb10f77fb2ad50ac1e49cb9dad5ff446d2c80e7654fcc6e7c7abd7a97c86fcff1c7dc8828f64d06288c1ea872ef2733bfa86b31e
SSDEEP

3072:0ZZ8QZdlV5P0tZnp5SV1Dm75ohHX1hVD27yGheOBS5P:Y8Qjh0t16V16lg1h9ieV5P

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 9 IoCs

backdoor

resource	yara_rule
behavioral2/memory/4528-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4528-6-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4528-10-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1532-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1532-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1532-21-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1532-23-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1532-36-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1532-37-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
3368	service189.exe
1532	service189.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-1-5-21-464762018-485119342-1613148473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service189.exe"	service189.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service189.exe"	service189.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)	\??\F:	service189.exe
File opened (read-only)	\??\D:	service189.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\\service189.exe"	service189.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service189.exe	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service189.exe	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2636 set thread context of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 3368 set thread context of 1532	3368	service189.exe	93

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	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service189.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service189.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 2636 wrote to memory of 4528	2636	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	87
PID 4528 wrote to memory of 3368	4528	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	88
PID 4528 wrote to memory of 3368	4528	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	88
PID 4528 wrote to memory of 3368	4528	74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe	88
PID 3368 wrote to memory of 1532	3368	service189.exe	93
PID 3368 wrote to memory of 1532	3368	service189.exe	93
PID 3368 wrote to memory of 1532	3368	service189.exe	93
PID 3368 wrote to memory of 1532	3368	service189.exe	93
PID 3368 wrote to memory of 1532	3368	service189.exe	93
PID 3368 wrote to memory of 1532	3368	service189.exe	93
PID 3368 wrote to memory of 1532	3368	service189.exe	93

C:\Users\Admin\AppData\Local\Temp\74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Users\Admin\AppData\Local\Temp\74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\74a699c69e74e876ce5bd3df4adf0d64_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4528
- - C:\Windows\SysWOW64\service189.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3368
  - - C:\Windows\SysWOW64\service189.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:1532

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

Replay Monitor

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Downloads

C:\Windows\SysWOW64\service189.exe

Filesize
172KB

MD5
74a699c69e74e876ce5bd3df4adf0d64

SHA1
7ce2fbee6a78f5b4308f683c630aa497f7d10b19

SHA256
89b61ea59172d4fed5b4e329cf65ee09fbe81936f1d57bf5e65e9bca9f8c790a

SHA512
2072e87796abcdb70582e910bb10f77fb2ad50ac1e49cb9dad5ff446d2c80e7654fcc6e7c7abd7a97c86fcff1c7dc8828f64d06288c1ea872ef2733bfa86b31e

Download Submit
memory/1532-20-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1532-37-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1532-36-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1532-23-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1532-21-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1532-22-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2636-0-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2636-3-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3368-17-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4528-10-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4528-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4528-6-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4528-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4528-4-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads