23a787bc7b94ce82de9f8b6bb5322ea739512ffee717e7216121e0e7d7900105

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 22:32

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General

Target

2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe
Size

91KB
MD5

cb214613b51529f9f0367c8e7a8ea0dd
SHA1

a91cc05f127b7d6dea2fe2e42c32b362df1d49f0
SHA256

23a787bc7b94ce82de9f8b6bb5322ea739512ffee717e7216121e0e7d7900105
SHA512

69e2d066e940e32e2255ead3d93fcfc906e3f46de5273a3cd9a624693ce66c094bada42606ded7e93868d428df7b28ff7978a6e7b97c22ecc71835016e79f62a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddE:AnBdOOtEvwDpj6zA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2604-12-0x0000000000610000-0x000000000061F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2604-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2128-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2604-12-0x0000000000610000-0x000000000061F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2604-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2128-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2604-12-0x0000000000610000-0x000000000061F000-memory.dmp	UPX
behavioral1/memory/2604-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2128-25-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2128 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe

pid process

2604 2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe

pid	process
2128	asih.exe

pid	process
2604	2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2604-12-0x0000000000610000-0x000000000061F000-memory.dmp	upx
behavioral1/memory/2604-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2128-25-0x0000000000500000-0x000000000050F000-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:

2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe

description	pid	process	target process
PID 2604 wrote to memory of 2128	2604	2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe	asih.exe
PID 2604 wrote to memory of 2128	2604	2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe	asih.exe
PID 2604 wrote to memory of 2128	2604	2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe	asih.exe
PID 2604 wrote to memory of 2128	2604	2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_cb214613b51529f9f0367c8e7a8ea0dd_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2128

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
01c8346d14cc5b4b71e24d71a8332e8b

SHA1
7c450b99619de10053db8c3ded714965c8eeffc4

SHA256
208b745af23e79f3a19e1d25a173ff5405b0344033d2239aa06941bb02109bff

SHA512
49f098e3592935b95722b79c5e8d413e933bc9c8654bf3c9031e210d5657affbfd1a3e9c05892e56faee44c067506eb2759a30b92617a2702e394ba77d3f2b52

Download Submit
memory/2128-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2604-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2604-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2604-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2604-12-0x0000000000610000-0x000000000061F000-memory.dmp

Filesize
60KB

Download
memory/2604-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download