4842051ba357bdab91d79740c3c8c4d81d6badda3ba38ad03cb53baeab4ea9f8

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 21:50

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General

Target

2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe
Size

39KB
MD5

91c65c9b006f46ec32287245f1a960e3
SHA1

11d4836701c1bdf83da6be304eb76cb65832e9a2
SHA256

4842051ba357bdab91d79740c3c8c4d81d6badda3ba38ad03cb53baeab4ea9f8
SHA512

191e49aef0bb0fdeffa23a21be08bd62c3f2a89248b4f65117330c0b646e49bb1600898136e94441e66927a0078b5ec86412b48d545be9dd782b6a9fba88a563
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8l2y:qDdFJy3QMOtEvwDpjjWMl7Tdn83

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1700-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1700-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2068-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1700-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1700-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2068-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1700-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1700-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2068-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2068 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe

pid process

1700 2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe

pid	process
2068	asih.exe

pid	process
1700	2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1700-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1700-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2068-26-0x0000000000500000-0x0000000000510000-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_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe

description	pid	process	target process
PID 1700 wrote to memory of 2068	1700	2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe	asih.exe
PID 1700 wrote to memory of 2068	1700	2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe	asih.exe
PID 1700 wrote to memory of 2068	1700	2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe	asih.exe
PID 1700 wrote to memory of 2068	1700	2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_91c65c9b006f46ec32287245f1a960e3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2068

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
39KB

MD5
bf7ed3bcb37b479dfad123cb04dfc0ea

SHA1
55b867540427ba8889914cc0dfd77fe2794609c6

SHA256
64cae8fd616b3c61a1ace9c13ea0c960eeb78faad7a5013580e434b9e1e10bf2

SHA512
4dda6eb168c98819879c7579070924a88fd45ef645c81dd9550732dfe79d62d3832f6ca558a30d5ab471427d24b2e5f6daa438655bcbbd6a31c5cebfe83e8fed

Download Submit
memory/1700-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1700-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1700-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1700-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1700-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2068-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2068-25-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2068-18-0x0000000000410000-0x0000000000416000-memory.dmp

Filesize
24KB

Download