7ee88337c85d2332da3fe1b1aaab8f2593cfb3d08afddef49a4e483895f38618

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 08:37

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General

Target

2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe
Size

41KB
MD5

61f3d6546ea0fb154ab5cc9da945c7ed
SHA1

376460e977a712b675573b4006bc0fdcb15740cb
SHA256

7ee88337c85d2332da3fe1b1aaab8f2593cfb3d08afddef49a4e483895f38618
SHA512

86cae49ab161a26df6cd636f16a5af6e0721401967a788979015f90fcdca7fcf1817666c343c7bf4021efc6c911b522720d9359e10cad158ec7c5d85218da543
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9Do:b/pYayGig5HjS3NPA9Do

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00090000000226e5-12.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1920	retln.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 1920	5012	2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe	88
PID 5012 wrote to memory of 1920	5012	2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe	88
PID 5012 wrote to memory of 1920	5012	2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_61f3d6546ea0fb154ab5cc9da945c7ed_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
42KB

MD5
3ae515e8074afdc7aeb75474cf36acda

SHA1
3f1e36d366e1b7e9502ed725539183ec247e909b

SHA256
c452d996d90b3bcc1ae00a647a4486dcf471c6fca8d20ab023df0ec91708fb06

SHA512
08777b2694618efb769298c219cd0deb2c0a1218b3c8843cd66fa98a35c34fe205c180e3c55746ee40e9c21af4dce63e1d2f3ce0a7758a1fd0c32cf62424f0e1

Download Submit
memory/1920-20-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/5012-0-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/5012-1-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/5012-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download