63f61cc3f925c2fde3a85a5ab4216e83d661c7ff113d0a93880ade956b03c70e

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
22/05/2024, 06:00

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General

Target

2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
Size

91KB
MD5

a5f8cc602876612217b18e06e3e2a9d5
SHA1

4809902355c17a3dc37d6b0782edd3ec56222162
SHA256

63f61cc3f925c2fde3a85a5ab4216e83d661c7ff113d0a93880ade956b03c70e
SHA512

34a4d6714f845f1afd4ae0f1cab23325b76567d15601197e3840090b0e75fab76066603a43ff9dbcfae2b63e8afa69283b23970a779008c4898d819662fd92a9
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/DO:n6a+1SEOtEvwDpjYYvQd2PZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000155f7-11.dat	CryptoLocker_rule2
behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c0000000155f7-11.dat	CryptoLocker_set1
behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c0000000155f7-11.dat	UPX
behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2868	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2244	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c0000000155f7-11.dat	upx
behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2868	2244	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	28
PID 2244 wrote to memory of 2868	2244	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	28
PID 2244 wrote to memory of 2868	2244	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	28
PID 2244 wrote to memory of 2868	2244	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2868

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\asih.exe

Filesize
91KB

MD5
cd14f152dca7c0ae87fa2891b6cf516c

SHA1
61ac9165f9080b39a84ea818d17d61009fd13692

SHA256
a5e039a24c5664175ef71f7c63e952faa586e981f2197c5c7c634408ede069e2

SHA512
45cff9a546f978a8276fadfe2d8b0ad42689d967cb391af2dbe256a43813feee2939159e00e84a820f490a7947fa99b3f2eb64849c08e6d7b6696dade447bfcb

Download Submit
memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2244-1-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2244-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2244-9-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2868-24-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2868-17-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download