b7c3c14ef41f70b6450214d85d60caf2d9700883d13c20f95c131d3738fd258b

Analysis

max time kernel
12s
max time network
152s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
23/01/2024, 07:40

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General

Target

2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe
Size

32KB
MD5

75e39820a6c7fea51c43835bcf89690e
SHA1

96a7cdb6950aee44c0999d031ba11ac689a8f510
SHA256

b7c3c14ef41f70b6450214d85d60caf2d9700883d13c20f95c131d3738fd258b
SHA512

14a4689bb98a7c44348054bce807e6d0e7fc4293e0329a948c58d61c9ebc141dab00b5e84e02308f3fdc47e7bfa2581625325d4e3a344ded3b3afb210521c109
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQAu:b/yC4GyNM01GuQMNXw2PSjHC02ltAu

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001225f-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2248	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2104	2024-01-23_75e39820a6c7fea51c43835bcf89690e_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
2104	2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe
2248	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 2248	2104	2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe	28
PID 2104 wrote to memory of 2248	2104	2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe	28
PID 2104 wrote to memory of 2248	2104	2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe	28
PID 2104 wrote to memory of 2248	2104	2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-23_75e39820a6c7fea51c43835bcf89690e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2104
- 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:2248

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
32KB

MD5
4a422fc735c9d988af8f6a2e76633797

SHA1
8c14685cc6881e7947d6a0870c0c066978b7c82d

SHA256
df9304f1b05291e9dede633f44134e7c1c0d68ff34681d22868634d204ee882e

SHA512
57044271e877a9515541daa9c596a1c23a8c9b20618eca6371b30e2c9a3eb0f614137c59bef4faa531179c9eb1e4a0dc6936f4b525084a6a596e3d98310bb1bb

Download Submit
memory/2104-0-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2104-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2104-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2248-23-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download