a29b41280543665d57ad22267b0bd83fb956b4324a1edbd58a408e0e3003ed3d

General

Target

2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe
Size

38KB
MD5

2f6e6a89a72ccf78f321f2e5ff265222
SHA1

eb18ef7f6f07ece1816eee8deb0b022e97cdc72e
SHA256

a29b41280543665d57ad22267b0bd83fb956b4324a1edbd58a408e0e3003ed3d
SHA512

e36c72b6aef2b974d0feac51cd9c21fc049e9ad6f08eb20646602c4e2ea9c73203f38923f69d6ee17da7efe898f9bec442c7c34c9ec113e9a644b44e4e6eab9b
SSDEEP

768:qTVbxjgQNQXtckstOOtEvwDpjAaD3TUogs/VXpAPWRr:qTJu9cvMOtEvwDpjppVXzRr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2944-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2888-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2888-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2944-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2944-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2888-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2888-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2944-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2944-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2888-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2888-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2944-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2944 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe

pid process

2888 2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe

pid	process
2944	asih.exe

pid	process
2888	2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2944-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2888-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2888-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2944-27-0x0000000000500000-0x000000000050F000-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_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe

description	pid	process	target process
PID 2888 wrote to memory of 2944	2888	2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe	asih.exe
PID 2888 wrote to memory of 2944	2888	2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe	asih.exe
PID 2888 wrote to memory of 2944	2888	2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe	asih.exe
PID 2888 wrote to memory of 2944	2888	2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_2f6e6a89a72ccf78f321f2e5ff265222_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2888

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2944

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

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

Filesize
38KB

MD5
e92a678ce0fb8a411cc4342d9d06696b

SHA1
2dc72159ae96fab39534056c9b5250d3ff6dab1f

SHA256
ad7ed6e0484b24188bb7c097598e074d8447471acf588f7f4757cbb057ea2ee4

SHA512
a6a5d4a64358bae979c931884d9c661baaaed9fe5be87dc7c45819a8e4d586151232ef2194898bb3a07fc9a3a62473c34c7f49b42c5ac3edce50a0b01725144c

Download Submit
memory/2888-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2888-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2888-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2888-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2888-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2944-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2944-19-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2944-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2944-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads