9406361feac84c30660cebab20a043f14f35d8850fb147c3661f05d768f47f86

General

Target

2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe
Size

89KB
MD5

8ce984931e7724f99f2493f541586f28
SHA1

34984bbe535c18a06b9f837134089751ef165eab
SHA256

9406361feac84c30660cebab20a043f14f35d8850fb147c3661f05d768f47f86
SHA512

9766a9a0af058a0d8db2ea564312a6662584b6a5a7d31351ca04ea1550ad6927264a223301165e4bce74e145e0a9086d71aacb0d72bc2177be092e91bd1e2933
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgIiW:AnBdOOtEvwDpj6zk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2380-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2380 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

pid process

3028 2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

pid	process
2380	asih.exe

pid	process
3028	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2380-27-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

description	pid	process	target process
PID 3028 wrote to memory of 2380	3028	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe
PID 3028 wrote to memory of 2380	3028	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe
PID 3028 wrote to memory of 2380	3028	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe
PID 3028 wrote to memory of 2380	3028	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3028

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
90KB

MD5
921327eef4ea578bd0e1acf9c4c3304c

SHA1
1f8b192cdf674172cd1343577127bfd66266a2ac

SHA256
aa1ac3d5c6bcbb33b244f1b794f64b08405c5caf65c6f029dd7dfede01449ec0

SHA512
7e29d810ed68aa6e5f3a527c6689ec349bc7dfceb0edb06c4cb49e074e8b988b70b34cf586ea678737b9239d32cdb84922590f2323dbf50df6aea3e2feec7035

Download Submit
memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2380-19-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/2380-26-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2380-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3028-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3028-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3028-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads