5ed8bcccd96582cb3c4404c3ae9ce872034ed635b831ac03fefe9d3729723723

General

Target

2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe
Size

39KB
MD5

b4ebc701cf15ee8ce2d2e755742859a1
SHA1

ff77ba6f6a6c9bfeb69d8a8a40a4ba987234c900
SHA256

5ed8bcccd96582cb3c4404c3ae9ce872034ed635b831ac03fefe9d3729723723
SHA512

3aae81756a3bad3ddc55f6a3fb921c145b9bedb36db8f6f63dfa88dc5d80386e135e35c01af1079cde283e7b626b26e2ade7e09426b369b60b9c80eae394eccf
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBsYG:qDdFJy3QMOtEvwDpjjWMl7TdvG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012324-11.dat	CryptoLocker_rule2
behavioral1/memory/2804-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2804-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1880-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000012324-11.dat	CryptoLocker_set1
behavioral1/memory/2804-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2804-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1880-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d000000012324-11.dat	UPX
behavioral1/memory/2804-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	UPX
behavioral1/memory/2804-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1880-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1880-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1880	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2804	2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d000000012324-11.dat	upx
behavioral1/memory/2804-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	upx
behavioral1/memory/2804-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1880-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1880-28-0x0000000000500000-0x0000000000510000-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 2804 wrote to memory of 1880	2804	2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe	28
PID 2804 wrote to memory of 1880	2804	2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe	28
PID 2804 wrote to memory of 1880	2804	2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe	28
PID 2804 wrote to memory of 1880	2804	2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-14_b4ebc701cf15ee8ce2d2e755742859a1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1880

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
39KB

MD5
449886dc6295cf31868fd37994326572

SHA1
dbbfa26d8163d476ce53e40d57227f28b3243141

SHA256
8950ae765264c97f556d2bf6fdf7a05a752eaf4915fb65e32508f8c8ed392db1

SHA512
aa328c2733065202933f9c534e0d3620a4fd636f8ead56f06325353671a0da7689a03ef092ab1a3bc9b23931cad576b6d68cce41841c93e44a9c2bb6b2cad760

Download Submit
memory/1880-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1880-20-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1880-27-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/1880-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2804-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2804-2-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/2804-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2804-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp

Filesize
64KB

Download
memory/2804-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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