5d06e6aac70e2418dc0c567b0a0a3c20d50dfa199eaaa9c39235dcd1dd34c55f

Analysis

max time kernel
13s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26/04/2024, 19:41

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General

Target

2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe
Size

42KB
MD5

db2087505d0c23fb2039e836803b3280
SHA1

ac199842d71b48302a6ba1ab497cee743fd22f61
SHA256

5d06e6aac70e2418dc0c567b0a0a3c20d50dfa199eaaa9c39235dcd1dd34c55f
SHA512

e65300e962f301d2b75c90b1ec0ab6dd61e831e0bed048602a80df1656b64a155921dbafb134724cc2f99265818802f409ead6875a67a719cf69e66abfd78c50
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAe:b/pYayGig5HjS3NPAe

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000d00000001449a-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2472	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1908	2024-04-26_db2087505d0c23fb2039e836803b3280_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
1908	2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe
2472	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 2472	1908	2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe	28
PID 1908 wrote to memory of 2472	1908	2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe	28
PID 1908 wrote to memory of 2472	1908	2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe	28
PID 1908 wrote to memory of 2472	1908	2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_db2087505d0c23fb2039e836803b3280_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1908
- 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:2472

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
43KB

MD5
930ade6c69c2306678b6195b6f20f894

SHA1
66e8b61306b456662d16a11a16faa0d19998296e

SHA256
d49c45165a2150652f70a39c72e4f574a939339e98768fcc5c6901605bdc563b

SHA512
361073f63d31c34fee6b4be6a69ca27dfff3733d5e088caf53139e4a30f29fb90b6a71b97e286b25d36f943e57edd47814f0c9cf89d5e4b3233b42158868f228

Download Submit
memory/1908-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1908-0-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/1908-8-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2472-23-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download