cryptolocker | 136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65

General

Target

136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe
Size

355KB
MD5

f1e2de2a9135138ef5b15093612dd813
SHA1

ea64129f9634ce8a7c3f5e0dd8c2e70af46ae8a5
SHA256

136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65
SHA512

134f737dd1ec3dc7800ef96191cc81c5ae97b2ac882d77464fab8c585b838763793e5a521df1dbcd5399955e1e32a08f2d45612b06151b805ab8aa003f79dfb7

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

1984 Avywuixyxmexxtr.exe
852 Avywuixyxmexxtr.exe
Deletes itself 1 IoCs

Processes:

Avywuixyxmexxtr.exe

pid process

1984 Avywuixyxmexxtr.exe
Loads dropped DLL 1 IoCs

Processes:

136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe

pid process

2032 136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe

pid	process
1984	Avywuixyxmexxtr.exe
852	Avywuixyxmexxtr.exe

pid	process
1984	Avywuixyxmexxtr.exe

pid	process
2032	136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.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-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exeAvywuixyxmexxtr.exe

description	pid	process	target process
PID 2032 wrote to memory of 1984	2032	136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe	Avywuixyxmexxtr.exe
PID 2032 wrote to memory of 1984	2032	136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe	Avywuixyxmexxtr.exe
PID 2032 wrote to memory of 1984	2032	136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe	Avywuixyxmexxtr.exe
PID 2032 wrote to memory of 1984	2032	136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe	Avywuixyxmexxtr.exe
PID 1984 wrote to memory of 852	1984	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1984 wrote to memory of 852	1984	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1984 wrote to memory of 852	1984	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1984 wrote to memory of 852	1984	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe

C:\Users\Admin\AppData\Local\Temp\136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe
"C:\Users\Admin\AppData\Local\Temp\136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1984
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w11c
    3⤵
    - Executes dropped EXE
    PID:852

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
355KB

MD5
f1e2de2a9135138ef5b15093612dd813

SHA1
ea64129f9634ce8a7c3f5e0dd8c2e70af46ae8a5

SHA256
136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65

SHA512
134f737dd1ec3dc7800ef96191cc81c5ae97b2ac882d77464fab8c585b838763793e5a521df1dbcd5399955e1e32a08f2d45612b06151b805ab8aa003f79dfb7

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

Filesize
355KB

MD5
f1e2de2a9135138ef5b15093612dd813

SHA1
ea64129f9634ce8a7c3f5e0dd8c2e70af46ae8a5

SHA256
136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65

SHA512
134f737dd1ec3dc7800ef96191cc81c5ae97b2ac882d77464fab8c585b838763793e5a521df1dbcd5399955e1e32a08f2d45612b06151b805ab8aa003f79dfb7

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

Filesize
355KB

MD5
f1e2de2a9135138ef5b15093612dd813

SHA1
ea64129f9634ce8a7c3f5e0dd8c2e70af46ae8a5

SHA256
136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65

SHA512
134f737dd1ec3dc7800ef96191cc81c5ae97b2ac882d77464fab8c585b838763793e5a521df1dbcd5399955e1e32a08f2d45612b06151b805ab8aa003f79dfb7

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

Filesize
355KB

MD5
f1e2de2a9135138ef5b15093612dd813

SHA1
ea64129f9634ce8a7c3f5e0dd8c2e70af46ae8a5

SHA256
136e8991816b958bb76aaf22fefd18194cf78a80e95d572754f95e1f86149a65

SHA512
134f737dd1ec3dc7800ef96191cc81c5ae97b2ac882d77464fab8c585b838763793e5a521df1dbcd5399955e1e32a08f2d45612b06151b805ab8aa003f79dfb7

Download Submit
memory/852-63-0x0000000000000000-mapping.dmp

Download
memory/852-68-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/852-69-0x00000000002D0000-0x0000000000334000-memory.dmp

Filesize
400KB

Download
memory/1984-56-0x0000000000000000-mapping.dmp

Download
memory/1984-66-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/1984-67-0x00000000002E0000-0x0000000000344000-memory.dmp

Filesize
400KB

Download
memory/2032-59-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2032-58-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2032-60-0x00000000002F0000-0x0000000000354000-memory.dmp

Filesize
400KB

Download
memory/2032-54-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

Download

Analysis

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