737381a0133108c716571e999906c1e6b0679795cbd2c239ee489a56445a263d

Analysis

max time kernel
4s
max time network
102s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-02-2024 12:51

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General

Target

2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe
Size

38KB
MD5

96d9da85217361cd41d7b8ecc11bfeef
SHA1

a607b7b9413562f3a3994e229548cc7ad4605025
SHA256

737381a0133108c716571e999906c1e6b0679795cbd2c239ee489a56445a263d
SHA512

d70df4f123722cfb52caec5f8c553cf1585ff1e7e9d1f3b18a12fea36c402f38e0a6c8238dc5916798b2d02f753f95d379d7ade07fbf393cdaa6b638c21e8307
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYluo8Q:b/pYayGig5HjS3sQ

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012251-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2340	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2364	2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2364	2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe
2340	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 2340	2364	2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe	28
PID 2364 wrote to memory of 2340	2364	2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe	28
PID 2364 wrote to memory of 2340	2364	2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe	28
PID 2364 wrote to memory of 2340	2364	2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_96d9da85217361cd41d7b8ecc11bfeef_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
38KB

MD5
396f883024ffdcec0faa4da269b56895

SHA1
8db3a37d8f090bac71eb6d71ef768a919701d360

SHA256
cee9d072e0158ddce0e41e0511fd86ecdb09ad16fe7bd0623586e3be321e62ec

SHA512
1d5c4fb94b535833f2b50632f52eb9ba414b26bd164ca19ecb7938460ae33a73b959e4afdc9519211b4e797c894c70280e2517d1253d0f365f0f4a5c3a36b36b

Download Submit
memory/2340-23-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2364-0-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2364-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2364-7-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download