0f58d3a783d8354331bb218e250df2dea605825d2fbb4832ea24957d1e739940

Analysis

max time kernel
149s
max time network
155s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 06:25

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General

Target

2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe
Size

91KB
MD5

1a4cc52e1bd1864f19160b5ce581ace1
SHA1

483537b0276d2264f70fdddf75603b186cd7582b
SHA256

0f58d3a783d8354331bb218e250df2dea605825d2fbb4832ea24957d1e739940
SHA512

6778b8fb5ffb779cb9683a8ecb14969ee61e31281e123144365c2f20a96764f213e5df87651effd64616add557edac00053164f095f705d3dbca9323d684f18e
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/E:n6a+1SEOtEvwDpjYYvQd2PL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2212-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000014909-11.dat	CryptoLocker_rule2
behavioral1/memory/2212-13-0x0000000001FA0000-0x0000000001FB0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2212-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000014909-11.dat	CryptoLocker_set1
behavioral1/memory/2212-13-0x0000000001FA0000-0x0000000001FB0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2212-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d000000014909-11.dat	UPX
behavioral1/memory/2212-13-0x0000000001FA0000-0x0000000001FB0000-memory.dmp	UPX
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2108	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2212	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2212-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d000000014909-11.dat	upx
behavioral1/memory/2212-13-0x0000000001FA0000-0x0000000001FB0000-memory.dmp	upx
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2108-26-0x0000000000500000-0x0000000000510000-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 2212 wrote to memory of 2108	2212	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	28
PID 2212 wrote to memory of 2108	2212	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	28
PID 2212 wrote to memory of 2108	2212	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	28
PID 2212 wrote to memory of 2108	2212	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2108

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
91KB

MD5
245eaf9b60cbe0cb8452e00c158330a3

SHA1
ac612e5582698ecb743860811c5a888617e59f8d

SHA256
d51891bab8abe993ccb7f4f6d3cadd2a741fdbc3a0d77360c07945372396f5e5

SHA512
c2260f78cdd04b1a7139bb23504cffc087c6f514489a35a84b6d990e07cbca39463003eb51f30a324e5d441b0a8980d37d81ca14559a19ec91c72960531c4cfc

Download Submit
memory/2108-18-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2108-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2212-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2212-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2212-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2212-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2212-13-0x0000000001FA0000-0x0000000001FB0000-memory.dmp

Filesize
64KB

Download
memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download