3eeb45eef124233f91a01b0fc7519c765e544a43489d45cf8a79831be8928a91

General

Target

2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe
Size

76KB
MD5

ac098d03a3b0f08215270631fba1bd18
SHA1

8479eefe315c755c0cf642a30cdb88e831d1ee08
SHA256

3eeb45eef124233f91a01b0fc7519c765e544a43489d45cf8a79831be8928a91
SHA512

dd3f6a633a5bde353cf152bbf023658e0615ea67514f99f467339686d27f53e9893a4b49a5632f405f71a391adcbffc44fe1feb50cf87a433ce5d36e17152ef8
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxBR:T6a+rdOOtEvwDpjNtHPQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2308-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000013a3f-11.dat	CryptoLocker_rule2
behavioral1/memory/2308-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1804-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2308-13-0x0000000002840000-0x0000000002850000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2308-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000013a3f-11.dat	CryptoLocker_set1
behavioral1/memory/2308-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1804-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2308-13-0x0000000002840000-0x0000000002850000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2308-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000013a3f-11.dat	UPX
behavioral1/memory/2308-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1804-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2308-13-0x0000000002840000-0x0000000002850000-memory.dmp	UPX
behavioral1/memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1804	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2308	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2308-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000013a3f-11.dat	upx
behavioral1/memory/2308-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1804-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2308-13-0x0000000002840000-0x0000000002850000-memory.dmp	upx
behavioral1/memory/1804-26-0x0000000000500000-0x0000000000510000-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 2308 wrote to memory of 1804	2308	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	28
PID 2308 wrote to memory of 1804	2308	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	28
PID 2308 wrote to memory of 1804	2308	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	28
PID 2308 wrote to memory of 1804	2308	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2308
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1804

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

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

Filesize
76KB

MD5
eabdfe2a6d6491e2cc4b64e5ebf78580

SHA1
53484f2933192dd91107c0132897ae3e29864085

SHA256
2d8ae94475c76be5945f58838a3a72551de9c4e9023460dbf481297d169fa087

SHA512
cb25ce3470921eff370336b39cf97ffcec61b8d5aef0a4d1e424fbecdf82c78a0be665a016cfbbf959b70ebf79f0a30951f20c6cf63281192f24d2fdd12c7a63

Download Submit
memory/1804-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1804-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2308-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2308-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2308-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2308-8-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2308-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2308-13-0x0000000002840000-0x0000000002850000-memory.dmp

Filesize
64KB

Download

Analysis

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