64836ac3d2262215d8757caf786f7a54df2e8b993da646f1b441567d1ad27a03

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 04:42

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General

Target

2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe
Size

23KB
MD5

5b32aa0d4ec5b5c8acaa16cbbf513bc2
SHA1

e7c1ec3caeece35ebe5f7fd2a09fb7831f019693
SHA256

64836ac3d2262215d8757caf786f7a54df2e8b993da646f1b441567d1ad27a03
SHA512

940574a6ffad35bd1b79ca431e3e79de6f9bd4d5425837db9cc85741598ccfdbbaec73482850214cc99d584b5b4f6950e8e6a15ac89cca8a54d360e287dc81a5
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HnA:bVCPwFRo6CpwXFXSqQXfjAHA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1852-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023b86-13.dat	CryptoLocker_rule2
behavioral2/memory/1852-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2000-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1852-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000b000000023b86-13.dat	UPX
behavioral2/memory/1852-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2000-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2000	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1852-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000b000000023b86-13.dat	upx
behavioral2/memory/1852-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2000-26-0x0000000008000000-0x000000000800E000-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 3 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 2000	1852	2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe	84
PID 1852 wrote to memory of 2000	1852	2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe	84
PID 1852 wrote to memory of 2000	1852	2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_5b32aa0d4ec5b5c8acaa16cbbf513bc2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
23KB

MD5
5bdb64294a42c0b29051859110df6c36

SHA1
9df021e27f50dee8a55bd7a06eeb6c4d8f702921

SHA256
a96e6f03da0482a8de9e25244d999bbf71ab3b9546b39b7415aa6d0e9666725b

SHA512
ae26da9ae87874f4cd8360567c25f8fdf6b80fab57995e1219eeb8eeab4bffb55eb7757fcb4eaeee17b425f5f5119c973c30f8f32c6929cfa736858e2a00b40d

Download Submit
memory/1852-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1852-1-0x0000000000780000-0x0000000000786000-memory.dmp

Filesize
24KB

Download
memory/1852-9-0x0000000000780000-0x0000000000786000-memory.dmp

Filesize
24KB

Download
memory/1852-3-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/1852-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2000-19-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/2000-25-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/2000-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download