0379fbd4eb8e3fc7aafaf5107f6763395632d1f5cce1137fe337391a7216e15d

Analysis

max time kernel
10s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29/05/2024, 04:45

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General

Target

2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe
Size

38KB
MD5

fd27d1c2255f519149005392ba674614
SHA1

30ed53bec1ccfef9caca36bf00e83a090dce2581
SHA256

0379fbd4eb8e3fc7aafaf5107f6763395632d1f5cce1137fe337391a7216e15d
SHA512

942bce9e156662d9bd8e14c72ab66ce1100090ab76e1efbcc73f233eca03dc42db1a4db9f8792883549d73ef56b0ba8d2c77c17bfbe14bd47f251dd7314b3b3a
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjxuaPlbd:b/yC4GyNM01GuQMNXw2PSjH+PPxVb

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000015ccd-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2792	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1196	2024-05-29_fd27d1c2255f519149005392ba674614_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
1196	2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe
2792	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1196 wrote to memory of 2792	1196	2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe	28
PID 1196 wrote to memory of 2792	1196	2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe	28
PID 1196 wrote to memory of 2792	1196	2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe	28
PID 1196 wrote to memory of 2792	1196	2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_fd27d1c2255f519149005392ba674614_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1196
- 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:2792

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
75a2af09e1a121023958fb7f2fa16bc5

SHA1
87f503ceb9d2dd9a6367f229989dc267bf86b9c9

SHA256
09378c3e117ff686126851b63a6f860e75f9aa77f43b9e8a68ded06f2e8f1daf

SHA512
1bbbdd69d6d9126fa520965a6194dd5a6ac0a947d72e74e334dc52e1b164cf36eac542fc05c80a311c93e913c59bb8284a11855343180033aea0869a5a01b281

Download Submit
memory/1196-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/1196-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1196-8-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2792-23-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download