412dc80be4935780b9a9726064bd4aa7c46841ce999dd642262c693c00e8fe6c

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05/06/2024, 00:37

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General

Target

2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe
Size

95KB
MD5

87c66d6721d6d189ccb1509bfb6efe9e
SHA1

81afe73c27e316bf83a77f0a51a3a39be1bfaac7
SHA256

412dc80be4935780b9a9726064bd4aa7c46841ce999dd642262c693c00e8fe6c
SHA512

2692c2b36a40e343f4d932669dac8e58240023ecafebd795b61476f514aefe03446bd45de89d852f6d9f46a33357022e6711821a5ac406a6fe8f12953562dabe
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+/:AnBdOOtEvwDpj6z0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2168-8-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e000000014708-11.dat	CryptoLocker_rule2
behavioral1/memory/2532-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2532-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2168-8-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000e000000014708-11.dat	CryptoLocker_set1
behavioral1/memory/2532-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2532-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2168-8-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000e000000014708-11.dat	UPX
behavioral1/memory/2532-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2532-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2532	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2168	2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2168-8-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000e000000014708-11.dat	upx
behavioral1/memory/2532-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2532-27-0x0000000000500000-0x000000000050F000-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 2168 wrote to memory of 2532	2168	2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe	28
PID 2168 wrote to memory of 2532	2168	2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe	28
PID 2168 wrote to memory of 2532	2168	2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe	28
PID 2168 wrote to memory of 2532	2168	2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_87c66d6721d6d189ccb1509bfb6efe9e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2532

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
95KB

MD5
b13f91c8fc577062c01da76bd93e5c3b

SHA1
6edc5727596a57702c398d6b40bfd1ed2b03fcad

SHA256
e4e04b76d9e7f2a00b0941b755d43f72795506d33bffdd4381caea3dc340dce4

SHA512
81ea01bce54f3f333a4d031ca713512f4f7b9b32550ea5bc79b2279a2bad5daf42b1983598fe72ec812f73e12bec4972cc4b48ec73ac6a2c38271d2d374f0bc7

Download Submit
memory/2168-0-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2168-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2168-8-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2168-1-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2168-14-0x0000000000990000-0x000000000099F000-memory.dmp

Filesize
60KB

Download
memory/2532-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2532-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2532-26-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2532-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download