6712a9b7478e868be0dee4d8cb166694db0213885d2804b170da14cfe3ca4910

Analysis

max time kernel
14s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13-03-2024 05:44

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General

Target

2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe
Size

32KB
MD5

764ab904f255437dabe01483f3f19a8f
SHA1

2c504a630343588555c17ce6c25785d4d0d19145
SHA256

6712a9b7478e868be0dee4d8cb166694db0213885d2804b170da14cfe3ca4910
SHA512

fd803204e390b8def54a33f1cf7325a840cea394c39fddc936e001144334fc3e75920ea9da965cc12799fc9365fe9a358356c768a5e0846c9ebf4d6e7b0d6765
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUsso+:b/yC4GyNM01GuQMNXw2PSjWo+

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012267-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2084	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2924	2024-03-13_764ab904f255437dabe01483f3f19a8f_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
2924	2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe
2084	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2924 wrote to memory of 2084	2924	2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe	28
PID 2924 wrote to memory of 2084	2924	2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe	28
PID 2924 wrote to memory of 2084	2924	2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe	28
PID 2924 wrote to memory of 2084	2924	2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2924
- 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:2084

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
43e865cd98b27924189eb5e1cfab2a6b

SHA1
9b0f405acbed9dc854ad810f08526f94fb7083c7

SHA256
79beb3a7fdde290a0ec43bbc5ad5f7976863efeec1730880795b4e6404fa424d

SHA512
08fe3da7bf73a4f4134c1018aa19422666431e6fd867fe65eb6dc67272ff3a6c09497dede6760bfac3952485a0f63c75410c9f65295dbe2dc47586a62b92d45c

Download Submit
memory/2084-18-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2924-0-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2924-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2924-2-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download