5e32018d79c98fd84c13b9bc92537640c7f54f647b7c165250b1bb2da69a22cd

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
18/02/2024, 13:38

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General

Target

2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe
Size

67KB
MD5

802259be76359d46017dc9ad768ba35b
SHA1

814d398696fcaa5d50805558774f4b45f9471f0b
SHA256

5e32018d79c98fd84c13b9bc92537640c7f54f647b7c165250b1bb2da69a22cd
SHA512

bce599ef7bbb9732ec7f904eae8e524f863cb0bcbbdddd49b95bd4499ab2020167c0e08302b214e63f0fad2d0510c7cb7bacc0bede322cbfb5ccfb766801be00
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBv:z6a+CdOOtEvwDpjQN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2572-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000012252-11.dat	CryptoLocker_rule2
behavioral1/memory/2572-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2448-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2448-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2572-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000012252-11.dat	CryptoLocker_set1
behavioral1/memory/2572-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2448-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2448-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2572-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0009000000012252-11.dat	UPX
behavioral1/memory/2572-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2448-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2448-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2448	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2572	2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2572-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0009000000012252-11.dat	upx
behavioral1/memory/2572-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2448-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2448-26-0x0000000000500000-0x0000000000510000-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 2572 wrote to memory of 2448	2572	2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe	28
PID 2572 wrote to memory of 2448	2572	2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe	28
PID 2572 wrote to memory of 2448	2572	2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe	28
PID 2572 wrote to memory of 2448	2572	2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_802259be76359d46017dc9ad768ba35b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2448

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
67KB

MD5
81b9afcd9a245129f72c22e82d59d6c7

SHA1
de4f5842f780508393fcf50adec9fe8c9540dfc6

SHA256
69715578d6d2e1b323393c06ba921052aea48eb1cbc1cde5758db070f0618990

SHA512
eb90f8b5e75cafcdef3ea5f77ef2c5f49e59dff06bdd8671ff8b2f53b4c8a635bd0a97537f08fa0ac110e5bdba10bc337187c02254353931b99030c63422eb12

Download Submit
memory/2448-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2448-18-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2448-24-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2448-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2572-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2572-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2572-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2572-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2572-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download