94002d42b6ecd23f5b8d42676235f081150fc674cccc56ee4b57306bdf7a1d89

Analysis

max time kernel
14s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
23/01/2024, 22:22

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General

Target

2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe
Size

33KB
MD5

062f7e5f539e97ed86f6ed739fac28cf
SHA1

1a23ee58fba50077240b16a000066d718ef268f3
SHA256

94002d42b6ecd23f5b8d42676235f081150fc674cccc56ee4b57306bdf7a1d89
SHA512

0057447b2125d35d197d12190761d34e59d9dfcb500f398beed1c58b1a144ba1bea9cd17e796303ed7825751ee8347f631e22ac82f4942808f2ac6406b8f09f9
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvyVX2:b/yC4GyNM01GuQMNXw2PSjHPqVX2

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000012252-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1364	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1972	2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_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
1972	2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe
1364	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1364	1972	2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe	28
PID 1972 wrote to memory of 1364	1972	2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe	28
PID 1972 wrote to memory of 1364	1972	2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe	28
PID 1972 wrote to memory of 1364	1972	2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-23_062f7e5f539e97ed86f6ed739fac28cf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1972
- 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:1364

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
33KB

MD5
fb05fab564e91e25ea9ff4cc3b22b429

SHA1
a02f3457758d1708bb11f83cc769f69b1a0b5818

SHA256
932f031cb2e8541a1ec6fed53b450ad99de60c37b1ed6fad033f72894949b409

SHA512
e2e93b8ff09260de8896ce11fea697c8f419c8b31574cf26170f48866b97eeeb59b112ab2c6abc664128627ed33a386fdaff64b0b65411abddcf27027a82eb81

Download Submit
memory/1364-19-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/1972-0-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1972-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1972-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download