b8299110250e33a025fd8d90ccfa88e643a8fc6bd5a2dc919a3a7aff32b0efe1

General

Target

2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe
Size

37KB
MD5

569106924948d06951183a2f14f55af4
SHA1

f5564ba4611fae3f2cdf43df0e25b2cb29660097
SHA256

b8299110250e33a025fd8d90ccfa88e643a8fc6bd5a2dc919a3a7aff32b0efe1
SHA512

f7e96b283dd73312ca9d098a71734469ab2862459a868fa4c9162df842d423daa9906d6be7ce22e35dce74f7c7fff1590e11d8445608cfe73d4c358a0add02b3
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYm:qDdFJy3QMOtEvwDpjjWMl7Tv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_rule2
behavioral1/memory/2196-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2536-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2196-17-0x0000000002320000-0x0000000002330000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2536-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_set1
behavioral1/memory/2196-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2536-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2196-17-0x0000000002320000-0x0000000002330000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2536-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012256-11.dat	UPX
behavioral1/memory/2196-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2536-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2536-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2536	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2196	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000012256-11.dat	upx
behavioral1/memory/2196-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2536-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2536-27-0x0000000000500000-0x0000000000510000-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 2196 wrote to memory of 2536	2196	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	28
PID 2196 wrote to memory of 2536	2196	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	28
PID 2196 wrote to memory of 2536	2196	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	28
PID 2196 wrote to memory of 2536	2196	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2536

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
37KB

MD5
190109bb40a8c02cf04597d3304b1a1e

SHA1
954db27ab37a4c2c04b12ae4ef48a1f3f79cef98

SHA256
8467b5b859b7c122b4c5f6df15d16bf350799b5522c18c1e2e132b94cc42e0b1

SHA512
d63414a4210cbd1d0921db0d0d0e6be660ae611f56bae936444f8f5719a671ff5d5b90d6495eebc3d88bc70e4f417a07bb38496cf188eb358cf368c097907430

Download Submit
memory/2196-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2196-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2196-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2196-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2196-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2196-17-0x0000000002320000-0x0000000002330000-memory.dmp

Filesize
64KB

Download
memory/2536-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2536-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2536-21-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2536-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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