5b694b29d08602c7a6d6f3e231350d638de929938e23a3435eeb9868be2311df

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
18/03/2024, 16:26

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General

Target

2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe
Size

82KB
MD5

2653c3f5a8e5ed9310da8d3a295f8265
SHA1

bf7d3ae0249a0faa70c8245b3daa2a529bd61794
SHA256

5b694b29d08602c7a6d6f3e231350d638de929938e23a3435eeb9868be2311df
SHA512

d66fa3ea7d8b9c38590bd082f63afc48d15d4772c3b24ed9229ba12efe276023ad20bacc1d295862f6d67d2719ed52ec2e1e3194e5da102eee17f4f65ae074ad
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vc:T6a+rdOOtEvwDpjNY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1404-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122fa-11.dat	CryptoLocker_rule2
behavioral1/memory/1404-13-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2064-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1404-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122fa-11.dat	CryptoLocker_set1
behavioral1/memory/1404-13-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2064-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1404-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d0000000122fa-11.dat	UPX
behavioral1/memory/1404-13-0x00000000023A0000-0x00000000023B0000-memory.dmp	UPX
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2064-21-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2064	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1404	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1404-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d0000000122fa-11.dat	upx
behavioral1/memory/1404-13-0x00000000023A0000-0x00000000023B0000-memory.dmp	upx
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2064-21-0x0000000000500000-0x0000000000510000-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 1404 wrote to memory of 2064	1404	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	28
PID 1404 wrote to memory of 2064	1404	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	28
PID 1404 wrote to memory of 2064	1404	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	28
PID 1404 wrote to memory of 2064	1404	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2064

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
83KB

MD5
6208efdcba82c900c3b90baf496a1faf

SHA1
db672d5aa08d0e640c20f42041bb8e1f724b545c

SHA256
76f0b8d3812ccb101dee4be7a59034811a5579a52c6bd7ea07263555d76ebb89

SHA512
7a994bced645f4c4158c92d35562849b73dc082954785146944ddc0433e801774c43128a3d2b2c16a8005d6df271e8e1d3549ddf770261e6066be43b4f817c41

Download Submit
memory/1404-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1404-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1404-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1404-8-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1404-13-0x00000000023A0000-0x00000000023B0000-memory.dmp

Filesize
64KB

Download
memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2064-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2064-18-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2064-21-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download