a5b41cb3bdfe82d1c57d8fd4cc03a1eada1fc69fc94e606e2aa15b675f09b537

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
07-01-2024 12:15

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General

Target

2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe
Size

99KB
MD5

b633cddfc003be9be432541d3516dd5a
SHA1

b5c202b233bf703a6b7661e0424cbb3eb0953772
SHA256

a5b41cb3bdfe82d1c57d8fd4cc03a1eada1fc69fc94e606e2aa15b675f09b537
SHA512

e606ec2d2dba01464656a1dd8a280121882d52d55b9721972f94cfa7aa2d9ee23e109f50ae8d174888b3a2af9c912321c0f0ef7420d05bbd074bdefa5a99b260
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviP1g:AnBdOOtEvwDpj6zg

Score

7^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2688	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1664	2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1664-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000b00000001225d-11.dat	upx
behavioral1/memory/1664-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2688-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2688-26-0x0000000000500000-0x000000000050F000-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 1664 wrote to memory of 2688	1664	2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe	28
PID 1664 wrote to memory of 2688	1664	2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe	28
PID 1664 wrote to memory of 2688	1664	2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe	28
PID 1664 wrote to memory of 2688	1664	2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-06_b633cddfc003be9be432541d3516dd5a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1664
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2688

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
100KB

MD5
8dca52806220ec24489be18afd73ed2d

SHA1
eaf02ad502cf235800f1328c312a7ad388be3d8a

SHA256
37b501d0916bdd9512b4b370fb2eb36c3f627f3ca21960328c1a61401d3c2764

SHA512
7c68232231003036924c9c57bd2eaf1e57066efd051311184ebd263b6697a67ecaf0f16aa2216ccfb16b934fb46aeb24a90422d02efcafd35558bef65e6da15d

Download Submit
memory/1664-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1664-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1664-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/1664-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1664-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2688-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2688-18-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2688-21-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2688-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download