e3a2fa60b3b2058415907b34d9e9e238e700ef775c418497e866e8ca4ee6695d

Analysis

max time kernel
16s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12/02/2024, 01:46

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General

Target

2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe
Size

41KB
MD5

c777594c1ba2d752427acccc028eacc9
SHA1

1b1672d1e9eb4b766ecb47275f25614909d41965
SHA256

e3a2fa60b3b2058415907b34d9e9e238e700ef775c418497e866e8ca4ee6695d
SHA512

11f54b61a52cc068cf657d807bf969cfb8a412e6df741d2c23bbb47baa3383b0597268a760eb4ee312ce7e238aab367abfa43c4089aaec5a98b17272ca9bb43d
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PArH:b/pYayGig5HjS3NPAL

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000012255-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2656	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2288	2024-02-12_c777594c1ba2d752427acccc028eacc9_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
2288	2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe
2656	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2656	2288	2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe	28
PID 2288 wrote to memory of 2656	2288	2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe	28
PID 2288 wrote to memory of 2656	2288	2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe	28
PID 2288 wrote to memory of 2656	2288	2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_c777594c1ba2d752427acccc028eacc9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2288
- 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:2656

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

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Downloads

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

Filesize
41KB

MD5
ab143f8ff03a4e8e86376ff7ee229402

SHA1
b181c6a3d03018b759f441ba8c482c4c4ddbda52

SHA256
036d289a6e6d5209a0bc0cda2a5ead81e4503fe04b9a8f91a186df5077b2e51d

SHA512
2fbbaf7002084821552b07313cca883e0816abe0a9ca7df39c7eec6c019cefc25dd75ee6b4604adc228e512a785c018e1f6494399b25425e6b5c058ad2bb5aff

Download Submit
memory/2288-0-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2288-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2288-1-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2656-17-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download