31e4bf5066891c87585c2f2bd739386b250933675cc2403458682e8f61e18530

Analysis

max time kernel
173s
max time network
191s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24/02/2024, 04:44

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General

Target

2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe
Size

100KB
MD5

5e39436a1d0b4cd15b18c0f0bff850d6
SHA1

2ebf190f58732db492a765086d260f718e353a23
SHA256

31e4bf5066891c87585c2f2bd739386b250933675cc2403458682e8f61e18530
SHA512

c0b7b8b53331bc621e7ba608ff0fec6fe6efe1625618e36327b2b3912b00b95dd673f775e4a19dc607933560c6068417c3cfa3a594fa869ae501f8143b949a67
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeB+:AnBdOOtEvwDpj6zl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1936-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1936-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012247-11.dat	CryptoLocker_rule2
behavioral1/memory/2576-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2576-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1936-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1936-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000012247-11.dat	CryptoLocker_set1
behavioral1/memory/2576-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2576-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1936-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1936-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000d000000012247-11.dat	UPX
behavioral1/memory/2576-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2576-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2576	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1936	2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1936-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1936-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000d000000012247-11.dat	upx
behavioral1/memory/2576-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2576-27-0x0000000000500000-0x000000000050F000-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 1936 wrote to memory of 2576	1936	2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe	29
PID 1936 wrote to memory of 2576	1936	2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe	29
PID 1936 wrote to memory of 2576	1936	2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe	29
PID 1936 wrote to memory of 2576	1936	2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_5e39436a1d0b4cd15b18c0f0bff850d6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2576

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
100KB

MD5
f1c51187e72c89c8902b0b6321afdef5

SHA1
95473a8d29cb981620e7810e673510fda605ddc5

SHA256
5ef1a0ccb250ed180b83a6d05e6b5132379ac700c241cbe575e2cf493219f7f2

SHA512
6ba9f14d636c23f0ab61c01b73fbe88e9e1f547a14b161e50358abf1246366bfdf86b37d3f770cd8b57578cd185ca9ca3d6aa3729f7208cc72df4ab3881bfa45

Download Submit
memory/1936-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1936-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1936-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1936-5-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1936-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1936-15-0x0000000002480000-0x000000000248F000-memory.dmp

Filesize
60KB

Download
memory/2576-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2576-19-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/2576-24-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2576-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download