cryptolocker | 19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005

General

Target

Trojan-Ransom.Win32.Blocker.exe
Size

870KB
MD5

e93af50428fcc74af931bfed7a1dc1b2
SHA1

9d49afd20fdd7b02944c149c86e5d94038d2311f
SHA256

19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005
SHA512

2f1a273123d09c94d778830d7498813df37eb33c7adf82abd0831e9658f0eae5ec3ea8945035295074b9eb4e94f446be05f16a5ace9a62a8fee281f421e01981
SSDEEP

12288:DoqwmCU3rRTTClQzzBnBwbwZ04htC5hDHsrY+oC9Q7ICnqDNs7Q+sSG61OMk+xID:klQN/TBBw0Z0KE5hDHeH3wqa7Q+O0

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Executes dropped EXE 2 IoCs

Processes:

Avywuixyxmexxtr.exeAvywuixyxmexxtr.exe

pid process

1124 Avywuixyxmexxtr.exe
1728 Avywuixyxmexxtr.exe
Deletes itself 1 IoCs

Processes:

Avywuixyxmexxtr.exe

pid process

1124 Avywuixyxmexxtr.exe
Loads dropped DLL 2 IoCs

Processes:

Trojan-Ransom.Win32.Blocker.exe

pid process

1620 Trojan-Ransom.Win32.Blocker.exe
1620 Trojan-Ransom.Win32.Blocker.exe

pid	process
1124	Avywuixyxmexxtr.exe
1728	Avywuixyxmexxtr.exe

pid	process
1124	Avywuixyxmexxtr.exe

pid	process
1620	Trojan-Ransom.Win32.Blocker.exe
1620	Trojan-Ransom.Win32.Blocker.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Avywuixyxmexxtr.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Trojan-Ransom.Win32.Blocker.exeAvywuixyxmexxtr.exe

description	pid	process	target process
PID 1620 wrote to memory of 1124	1620	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1620 wrote to memory of 1124	1620	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1620 wrote to memory of 1124	1620	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1620 wrote to memory of 1124	1620	Trojan-Ransom.Win32.Blocker.exe	Avywuixyxmexxtr.exe
PID 1124 wrote to memory of 1728	1124	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1124 wrote to memory of 1728	1124	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1124 wrote to memory of 1728	1124	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1124 wrote to memory of 1728	1124	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe

C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1124
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w12c
    3⤵
    - Executes dropped EXE
    PID:1728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
870KB

MD5
e93af50428fcc74af931bfed7a1dc1b2

SHA1
9d49afd20fdd7b02944c149c86e5d94038d2311f

SHA256
19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005

SHA512
2f1a273123d09c94d778830d7498813df37eb33c7adf82abd0831e9658f0eae5ec3ea8945035295074b9eb4e94f446be05f16a5ace9a62a8fee281f421e01981

Download Submit
C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
870KB

MD5
e93af50428fcc74af931bfed7a1dc1b2

SHA1
9d49afd20fdd7b02944c149c86e5d94038d2311f

SHA256
19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005

SHA512
2f1a273123d09c94d778830d7498813df37eb33c7adf82abd0831e9658f0eae5ec3ea8945035295074b9eb4e94f446be05f16a5ace9a62a8fee281f421e01981

Download Submit
C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
870KB

MD5
e93af50428fcc74af931bfed7a1dc1b2

SHA1
9d49afd20fdd7b02944c149c86e5d94038d2311f

SHA256
19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005

SHA512
2f1a273123d09c94d778830d7498813df37eb33c7adf82abd0831e9658f0eae5ec3ea8945035295074b9eb4e94f446be05f16a5ace9a62a8fee281f421e01981

Download Submit
\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
870KB

MD5
e93af50428fcc74af931bfed7a1dc1b2

SHA1
9d49afd20fdd7b02944c149c86e5d94038d2311f

SHA256
19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005

SHA512
2f1a273123d09c94d778830d7498813df37eb33c7adf82abd0831e9658f0eae5ec3ea8945035295074b9eb4e94f446be05f16a5ace9a62a8fee281f421e01981

Download Submit
\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
870KB

MD5
e93af50428fcc74af931bfed7a1dc1b2

SHA1
9d49afd20fdd7b02944c149c86e5d94038d2311f

SHA256
19013092dd66f787e2f8b3236f835ed4dba319e909ebdccdc6454aeac6530005

SHA512
2f1a273123d09c94d778830d7498813df37eb33c7adf82abd0831e9658f0eae5ec3ea8945035295074b9eb4e94f446be05f16a5ace9a62a8fee281f421e01981

Download Submit
memory/1124-60-0x0000000000000000-mapping.dmp

Download
memory/1124-63-0x0000000000400000-0x00000000005F6000-memory.dmp

Filesize
2.0MB

Download
memory/1620-54-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1620-55-0x0000000000400000-0x00000000005F6000-memory.dmp

Filesize
2.0MB

Download
memory/1728-67-0x0000000000000000-mapping.dmp

Download
memory/1728-70-0x0000000000400000-0x00000000005F6000-memory.dmp

Filesize
2.0MB

Download

Analysis

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