f498800a93517bbbf49538e3a96713fa6c1a65ce415250ddfc865cd97690d158

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04/02/2024, 03:40

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General

Target

2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe
Size

40KB
MD5

723e57db18ea81f2501a96496050cf94
SHA1

86e9b7309b4bb4a4be8a7319f5aa0956e6ba06c4
SHA256

f498800a93517bbbf49538e3a96713fa6c1a65ce415250ddfc865cd97690d158
SHA512

cc3be1ded19f4b8fd0f5e30dcc1c8cf2f8317e1ad74bd2d2336aa3950fab3114f2e41fc74ebaa34b9c95c92ded3b28a6827daf96d9a694073ef8c71a3c36485f
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA6:b/pYayGig5HjS3NPA6

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012243-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1724	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1692	2024-02-04_723e57db18ea81f2501a96496050cf94_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
1692	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe
1724	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 1724	1692	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	20
PID 1692 wrote to memory of 1724	1692	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	20
PID 1692 wrote to memory of 1724	1692	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	20
PID 1692 wrote to memory of 1724	1692	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	20

C:\Users\Admin\AppData\Local\Temp\2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1692
- 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:1724

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
40KB

MD5
fa967416d6d1d426357e39e33d172a10

SHA1
c4be8604ddf9f8b21794ee1b644a78a1fb2bcf1d

SHA256
0c97f855d0e70167620f5a3c67b04559e40f401e3baee87f532cdf4d3ea09198

SHA512
5687d3b3321bf5984773ff1f10546f6dc9784e043244e295532cd69a9db5952a3dc879b836e639643303673ad12ab9e6afda4fbf124e0d010877c369afd04fdf

Download Submit
memory/1692-8-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/1692-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1692-0-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/1724-20-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download