1fd34d52c81bb4fa87b8ad6f24abdf458a415dde3020423ec66248f518a53a58

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
14/05/2024, 19:46

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General

Target

2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe
Size

77KB
MD5

e2607842fb88253c794f63dde6b81cb9
SHA1

a60816b1a6588443f0e9654887fbc9e72a4475b4
SHA256

1fd34d52c81bb4fa87b8ad6f24abdf458a415dde3020423ec66248f518a53a58
SHA512

e243137ee65ebfe8698272ca74a5207101a8cfe4b60e0d71ccf5dedc41c88f9869e0d557f7723855fc117982433cd4ee713f4b080b6b4ba78f77610ac0355047
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxY:T6a+rdOOtEvwDpjNtHPn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000122ee-11.dat	CryptoLocker_rule2
behavioral1/memory/2888-13-0x0000000001D60000-0x0000000001D70000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2888-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b0000000122ee-11.dat	CryptoLocker_set1
behavioral1/memory/2888-13-0x0000000001D60000-0x0000000001D70000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2888-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3044-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b0000000122ee-11.dat	UPX
behavioral1/memory/2888-13-0x0000000001D60000-0x0000000001D70000-memory.dmp	UPX
behavioral1/memory/2888-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3044-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3044	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2888	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b0000000122ee-11.dat	upx
behavioral1/memory/2888-13-0x0000000001D60000-0x0000000001D70000-memory.dmp	upx
behavioral1/memory/2888-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3044-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2888 wrote to memory of 3044	2888	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	28
PID 2888 wrote to memory of 3044	2888	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	28
PID 2888 wrote to memory of 3044	2888	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	28
PID 2888 wrote to memory of 3044	2888	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_e2607842fb88253c794f63dde6b81cb9_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:3044

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
77KB

MD5
2317ad9d14386af01477c86ad00ab9b5

SHA1
67146ee337bd0a2a7e6812a4816628fcaf4e5918

SHA256
f12f66230058d7cd3e1257b98f8d67a513648a97d1b4b162c70afc23afa5fbb3

SHA512
d78b747e271d0b8c3fefaf2bba24031c13870b63cc7b132f62ac29fb453e02315de03dcca37a45016d0baa8958ad70b52f8a4eab6bd24c0b01e666b4ec85a435

Download Submit
memory/2888-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2888-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2888-2-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2888-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2888-13-0x0000000001D60000-0x0000000001D70000-memory.dmp

Filesize
64KB

Download
memory/2888-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3044-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3044-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3044-18-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download