984b8800a5687053c1eb547938d037a5a3564a234451da4fa9f978e1dd355ddc

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
14/02/2024, 19:06

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General

Target

2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe
Size

85KB
MD5

bd5b0d788e769e0cdf84d3b6e09e505a
SHA1

ad9263853843603136b3d1b3fde3932dc9984a57
SHA256

984b8800a5687053c1eb547938d037a5a3564a234451da4fa9f978e1dd355ddc
SHA512

70ce9502efcb3f6adce346bdaf9d9cb8090fc98757eea8153b09f3dda67b275d8a536394148468b6d2ef84c60ff6aa21fd462d67c48e5165cfcbb47741e1af68
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIgj9:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012243-11.dat	CryptoLocker_rule2
behavioral1/memory/1976-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012243-11.dat	CryptoLocker_set1
behavioral1/memory/1976-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000a000000012243-11.dat	UPX
behavioral1/memory/1976-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2680	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1976	2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000a000000012243-11.dat	upx
behavioral1/memory/1976-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1976 wrote to memory of 2680	1976	2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe	28
PID 1976 wrote to memory of 2680	1976	2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe	28
PID 1976 wrote to memory of 2680	1976	2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe	28
PID 1976 wrote to memory of 2680	1976	2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2680

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
85KB

MD5
472a8399a3bc04b8de2da6373ed4be91

SHA1
0758d3574bc933eee0c58742d7bce10d4666a9b6

SHA256
637354cc7a98cc9abbde64bccdffe59f0c3624c9dbaa4edc0827de246527473a

SHA512
610690a29f9b77274e4ee170ae07b0842624e000edcc2b9ce0938d461410eb445eee26a76309fd6537fd147a671f4e655e59b4db33b34e2046229fe7a2199a09

Download Submit
memory/1976-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1976-1-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/1976-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1976-4-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/1976-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2680-19-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2680-18-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download