e6c4af2c7b398d2b0e22530134b43ae4e20d5d87be63772f191e813fa0b94ec0

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
09/04/2024, 03:49

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General

Target

2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe
Size

21KB
MD5

a6712dd2b124d7ccafb1f28604f7e4f3
SHA1

1e048b5ceb66c3e07ae338bd44518c72770bccad
SHA256

e6c4af2c7b398d2b0e22530134b43ae4e20d5d87be63772f191e813fa0b94ec0
SHA512

124b409e1be3e5c38da1cb450c00e31d0bc8694e2d0e142947b5c598bf953594fdc8aefdc083a9b711c37fd63056766ee7142cc3f8e9f1fb3bf7110d598aacce
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6Ht:bVCPwFRo6CpwXFXSqQXfjAN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001233c-11.dat	CryptoLocker_rule2
behavioral1/memory/2240-15-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2940-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2940-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x000c00000001233c-11.dat	UPX
behavioral1/memory/2240-15-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2940-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2940-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2940	hasfj.exe

Loads dropped DLL 1 IoCs

pid	Process
2240	2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2240-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x000c00000001233c-11.dat	upx
behavioral1/memory/2240-15-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2940-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2940-26-0x0000000008000000-0x000000000800E000-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 2240 wrote to memory of 2940	2240	2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe	28
PID 2240 wrote to memory of 2940	2240	2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe	28
PID 2240 wrote to memory of 2940	2240	2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe	28
PID 2240 wrote to memory of 2940	2240	2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_a6712dd2b124d7ccafb1f28604f7e4f3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2940

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\hasfj.exe

Filesize
21KB

MD5
5c8bfe1ef5941d670e958346f5e92091

SHA1
f27e09374b2f517ce9ca58c75c69f7b711bee5e0

SHA256
4f52b1813ef6ef6738d23851b7555be8d6be0f9e3308eceba5df4f5979a05360

SHA512
ad4748a54a2ea3bf90581bd984c6dd5f70318d73fce0014cf70c64851f9d3fce8e129c0df0d8ec8ea83b82d85ae171a21003d60ef7b7e57d55239785bb2ff8ab

Download Submit
memory/2240-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2240-1-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2240-2-0x0000000000500000-0x0000000000506000-memory.dmp

Filesize
24KB

Download
memory/2240-9-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2240-15-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2940-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2940-18-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2940-24-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2940-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download