cryptolocker | d828981e90be2089e64c4a72961e9bbe2522709c242a8839c36cc9e45818e08d

General

Target

b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe
Size

362KB
MD5

3921543c211364b4827c55aeeef5260c
SHA1

4b7f71b8e7f228dbb0d296120b6f6f455d22248c
SHA256

d828981e90be2089e64c4a72961e9bbe2522709c242a8839c36cc9e45818e08d
SHA512

e50ca28538254b535256c1b2542a8d894b9177f3037508c3331197b5338fba609818e4a756c3fa9135c11df7c12aa22302d0e4336ba6b78858d10bb0e845221e
SSDEEP

6144:5vUC68qdnE8dF49BpAoWvcUZUq1XvNWgTO3x5N22vWvLRKKAX5l++SyVI:pxCRE8dQvWBZU6/1T85I2vCMX5l+Zn

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Executes dropped EXE 2 IoCs

pid	Process
1928	Avywuixyxmexxtr.exe
1424	Avywuixyxmexxtr.exe

Deletes itself 1 IoCs

pid	Process
1928	Avywuixyxmexxtr.exe

Loads dropped DLL 1 IoCs

pid	Process
1980	b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 1928	1980	b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe	28
PID 1980 wrote to memory of 1928	1980	b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe	28
PID 1980 wrote to memory of 1928	1980	b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe	28
PID 1980 wrote to memory of 1928	1980	b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe	28
PID 1928 wrote to memory of 1424	1928	Avywuixyxmexxtr.exe	29
PID 1928 wrote to memory of 1424	1928	Avywuixyxmexxtr.exe	29
PID 1928 wrote to memory of 1424	1928	Avywuixyxmexxtr.exe	29
PID 1928 wrote to memory of 1424	1928	Avywuixyxmexxtr.exe	29

C:\Users\Admin\AppData\Local\Temp\b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe
"C:\Users\Admin\AppData\Local\Temp\b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\b4c05e0e065058ae79d3ce9d51a470946aae036d2b163f85adcef10a6343246a_unpacked.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1928
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w11c
    3⤵
    - Executes dropped EXE
    PID:1424

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
362KB

MD5
3921543c211364b4827c55aeeef5260c

SHA1
4b7f71b8e7f228dbb0d296120b6f6f455d22248c

SHA256
d828981e90be2089e64c4a72961e9bbe2522709c242a8839c36cc9e45818e08d

SHA512
e50ca28538254b535256c1b2542a8d894b9177f3037508c3331197b5338fba609818e4a756c3fa9135c11df7c12aa22302d0e4336ba6b78858d10bb0e845221e

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

Filesize
362KB

MD5
3921543c211364b4827c55aeeef5260c

SHA1
4b7f71b8e7f228dbb0d296120b6f6f455d22248c

SHA256
d828981e90be2089e64c4a72961e9bbe2522709c242a8839c36cc9e45818e08d

SHA512
e50ca28538254b535256c1b2542a8d894b9177f3037508c3331197b5338fba609818e4a756c3fa9135c11df7c12aa22302d0e4336ba6b78858d10bb0e845221e

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

Filesize
362KB

MD5
3921543c211364b4827c55aeeef5260c

SHA1
4b7f71b8e7f228dbb0d296120b6f6f455d22248c

SHA256
d828981e90be2089e64c4a72961e9bbe2522709c242a8839c36cc9e45818e08d

SHA512
e50ca28538254b535256c1b2542a8d894b9177f3037508c3331197b5338fba609818e4a756c3fa9135c11df7c12aa22302d0e4336ba6b78858d10bb0e845221e

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

Filesize
362KB

MD5
3921543c211364b4827c55aeeef5260c

SHA1
4b7f71b8e7f228dbb0d296120b6f6f455d22248c

SHA256
d828981e90be2089e64c4a72961e9bbe2522709c242a8839c36cc9e45818e08d

SHA512
e50ca28538254b535256c1b2542a8d894b9177f3037508c3331197b5338fba609818e4a756c3fa9135c11df7c12aa22302d0e4336ba6b78858d10bb0e845221e

Download Submit
memory/1980-54-0x0000000076031000-0x0000000076033000-memory.dmp

Filesize
8KB

Download

Analysis

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