aac37e6f55bf1b18238eef8f4b3606258d15fa4f66f875a0f656e68f97dfed3a

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
18/02/2024, 23:15

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General

Target

2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe
Size

41KB
MD5

de41751a6f072095b54f82d9765fa2aa
SHA1

6c0696c7a5ef070e45f845fdcb638b01946eb2ed
SHA256

aac37e6f55bf1b18238eef8f4b3606258d15fa4f66f875a0f656e68f97dfed3a
SHA512

429fdc647995f73ca27825fd7a8ec6b4d033aff58482c7fdc38714c553ca5ab1476881a2407bb67a9b17266495254034d329916e80e2196e6a4260180bbf7235
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAQ:b/pYayGig5HjS3NPAQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000800000000b529-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2068	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1984	2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe

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
1984	2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe
2068	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 2068	1984	2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe	28
PID 1984 wrote to memory of 2068	1984	2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe	28
PID 1984 wrote to memory of 2068	1984	2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe	28
PID 1984 wrote to memory of 2068	1984	2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_de41751a6f072095b54f82d9765fa2aa_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1984
- 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:2068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
41KB

MD5
0feb739379ee859fe72d824be770cbc0

SHA1
c31e045821cdb97c6cdf5a9b4c5f7973864328e7

SHA256
a92dc5ecc042b3f8837d733741cdc7c8c3e4d51155379b205d014c1bbc8d536f

SHA512
40c6332cd2d6873bfc8438ec9cbdad1e53bfa059c0c2451029883e952c0b53dc252123d2ed0ad95b20ec369d0599c364f5b17392766dd8d97b6e8155be83dd0e

Download Submit
memory/1984-0-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/1984-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1984-8-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2068-17-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download