3f44db9085c380c6eb6ba898e968ca24a6bd09dad9171e8faa318cef786435fd

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26/03/2024, 06:33

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General

Target

2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe
Size

41KB
MD5

62b3dd4cdb594a8dea704dad07081827
SHA1

833762b9c4798c0549e7dfffb554a4fff9dc1717
SHA256

3f44db9085c380c6eb6ba898e968ca24a6bd09dad9171e8faa318cef786435fd
SHA512

7cf2c253e2a0b023acc76b9dfc5ee3372f58b9ba3f44541b341a29f3890aa60434b88ff66ed753df9126b5754a85e1f241b83e08c359fa274230a441de1fa076
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9D1:b/pYayGig5HjS3NPA9D1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000012265-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3044	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2480	2024-03-26_62b3dd4cdb594a8dea704dad07081827_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
2480	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe
3044	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 3044	2480	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	28
PID 2480 wrote to memory of 3044	2480	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	28
PID 2480 wrote to memory of 3044	2480	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	28
PID 2480 wrote to memory of 3044	2480	2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_62b3dd4cdb594a8dea704dad07081827_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2480
- 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:3044

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
5fcfcf9c5ae586353775f7502b4e3f2e

SHA1
639b4dd5d55da2ee6eff5d71daa7e339d9591af8

SHA256
c9b27d9f2372f35604000591d89b3d4a71fc4836c4a897596d6922eb8177fb4d

SHA512
70927d4480660ce1eb65a6b461f5240945c312ca68e2ecad8e59a826ac3edf6c9d93e1b09dd8652004f076d9bfb3186847f29775c3ff971e846e4335bb453d75

Download Submit
memory/2480-0-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/2480-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2480-2-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/3044-18-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download