4384613e70d6ad8ee66a6f8fd43a9d472da8be6192667a32768734386cd880ee

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08/05/2024, 03:36

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General

Target

2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe
Size

58KB
MD5

a1eb3195519ac45d22e51da957533674
SHA1

bd5c8f2e53ccd6ba42216c9666db8fca252ee800
SHA256

4384613e70d6ad8ee66a6f8fd43a9d472da8be6192667a32768734386cd880ee
SHA512

353653afc7d282b0dd1db0c937265658aaf86a8ceec50dee594710570ee7d835ac5db837305a920c060c58adc7470f9ab34a497e3bc94b77fb9b83bbf3146e59
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axK3x:z6QFElP6n+gKmddpMOtEvwDpj9aYaQx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015cff-11.dat	CryptoLocker_rule2
behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000015cff-11.dat	CryptoLocker_set1
behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000015cff-11.dat	UPX
behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2520-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2520	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2844	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000015cff-11.dat	upx
behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2520-25-0x0000000000500000-0x0000000000510000-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 2844 wrote to memory of 2520	2844	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	28
PID 2844 wrote to memory of 2520	2844	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	28
PID 2844 wrote to memory of 2520	2844	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	28
PID 2844 wrote to memory of 2520	2844	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2844
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2520

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
58KB

MD5
6dad0e8841ac311bbcacfcf0570d54d2

SHA1
64525a9e8ff5b82263793d921b1f1ca4d8189f61

SHA256
d030e1863bb1a0faf8a27dbb5f2477757760779a0ab7a8286e41d20bd7e4ac5d

SHA512
fd555955a16ec1cbf3ea47d1bf92489420d341e9292009def7e6742464bc4eabb1b7b00cacb6eb46c536547ba1df0d227e7f38d19405d9f2617a5e192566d796

Download Submit
memory/2520-24-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2520-17-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2520-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2844-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2844-9-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2844-2-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download