6e9e51873559b67d7e766a4f2f2ed474b770052e9ea0b0ef72851c0ddca41b84

General

Target

2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe
Size

107KB
MD5

62eeca4822178fed9acdd45e25e8ed15
SHA1

6a8fe53da7389254687f4ed52c84a47837537bca
SHA256

6e9e51873559b67d7e766a4f2f2ed474b770052e9ea0b0ef72851c0ddca41b84
SHA512

2a78ab8670b353fe2e6170c8c47cbfb441699a1294564de9d0467513072bed8bbcf2eaabf1f95304bc003370e2ff3d8c82ca8ee5cba0dfc56a23df7eeb0c25ce
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfF:1nK6a+qdOOtEvwDpjB

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2204-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012257-14.dat	CryptoLocker_rule2
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2204-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012257-14.dat	CryptoLocker_set1
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2204-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b000000012257-14.dat	UPX
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2520-28-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2520	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2204-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b000000012257-14.dat	upx
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2520-28-0x0000000000500000-0x000000000050F311-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 2204 wrote to memory of 2520	2204	2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe	28
PID 2204 wrote to memory of 2520	2204	2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe	28
PID 2204 wrote to memory of 2520	2204	2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe	28
PID 2204 wrote to memory of 2520	2204	2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_62eeca4822178fed9acdd45e25e8ed15_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2204
- 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

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
107KB

MD5
a15cd61b5948b97017c1a643df8355ec

SHA1
478876863bc54d19d06ead2992248d9e7d4ed8b0

SHA256
f18af34beda987f3a0384b7a707497093cd567d65adba08e774aefa33280c303

SHA512
c2484f8b4d8fa7839c6a1e5b27a0b07e9defa26e572640d75ebd8a46acc32f211fdc3ee1710379ba85341d509f1d65c67bad4649092a579e89d9466e5fc11acb

Download Submit
memory/2204-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2204-1-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2204-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2204-3-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2204-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2204-16-0x00000000005F0000-0x0000000000600000-memory.dmp

Filesize
64KB

Download
memory/2204-27-0x00000000005F0000-0x0000000000600000-memory.dmp

Filesize
64KB

Download
memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2520-20-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2520-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2520-28-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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