9a1cc729c2af721f81888c0e92e83419701909b334b0a5c0c5605a97514de834

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 20:33

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General

Target

2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe
Size

60KB
MD5

545c5d1d7027747e8e54b6fbb54b39da
SHA1

6a498af401d5ee093d99a9a858b2bb3acea5b32d
SHA256

9a1cc729c2af721f81888c0e92e83419701909b334b0a5c0c5605a97514de834
SHA512

5fa3bb029ec38ad43e3f9b65d1d68a81ebae25f3ae4cebdbea41ad481117117403281fe7b96706cd2bd0615944a41d1e447cbfb6011550b456e0ddd27545fce6
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pi:H6QFElP6n+gou9cvMOtEvwDpjCpVX4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2188-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2524-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2188-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2524-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2188-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2524-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2524 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

pid process

2188 2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

pid	process
2524	asih.exe

pid	process
2188	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2188-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2524-25-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

description	pid	process	target process
PID 2188 wrote to memory of 2524	2188	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe
PID 2188 wrote to memory of 2524	2188	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe
PID 2188 wrote to memory of 2524	2188	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe
PID 2188 wrote to memory of 2524	2188	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2188

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2524

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
60KB

MD5
32fe8b92cfad7c1e4a286ba5634fc183

SHA1
031215325135f8028f6cfa8fe1935655f6e7cfb3

SHA256
2325399511f8da63c5c133b5d3a41fbade52dd76cf3191ddcf93267fa5b22c36

SHA512
2fbb2967360977c6eb2a1b4e0fa2feb1238fcc38250395c7916c522519336d93a49a25ce94eeb4a082add45f61a4c8e2eefdbfd5d10a76e14b4f2d26c3cb2008

Download Submit
memory/2188-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2188-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2188-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2188-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2188-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2524-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2524-24-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2524-17-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download