d19d081d2f457b46b696bb48c23b4dd3f6b58c3089f0d9b7ab4849e0d255abba

Analysis

max time kernel
17s
max time network
118s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
28/02/2024, 18:26

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General

Target

2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe
Size

42KB
MD5

1cecb0f67bd56ba4e10c07b1987d23e1
SHA1

1b4337f9ed1a8d818a9b8dd7493bf738c36036d5
SHA256

d19d081d2f457b46b696bb48c23b4dd3f6b58c3089f0d9b7ab4849e0d255abba
SHA512

f2cb169a9de3e91f777bb9d5d7700dfefe82c3a182d9105ded0c012d0ff36895ad15ba1a3ec04b4b1331709c83bd9a8617069398c9b2ea674704555bc5ae9fa8
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PADa:b/pYayGig5HjS3NPAO

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000d000000012253-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2036	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2080	2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_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
2080	2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe
2036	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2036	2080	2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe	28
PID 2080 wrote to memory of 2036	2080	2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe	28
PID 2080 wrote to memory of 2036	2080	2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe	28
PID 2080 wrote to memory of 2036	2080	2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_1cecb0f67bd56ba4e10c07b1987d23e1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2080
- 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:2036

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
42KB

MD5
424c02430d02c4577f32a1134bb6974a

SHA1
4398010dd584f20509279c2c70818235083dc45a

SHA256
f795b52fd9561879c51de8d060a7795545e5938e077b765d82859f9782ccddb6

SHA512
f23e26d6a8096cbb9f9a40ddd23ac5ae3395f62b2cb33f83fdc0cad8ce44bc01a612f715c36b13b9868f1f929097ac2e4efe453b2153d1a073a1845ca6717b63

Download Submit
memory/2036-21-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2080-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2080-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2080-8-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download