908a481a810773fde5d8edcb83877fb2e0159ea80413d7ecb3672ac11aa69ab8

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
29-01-2024 07:30

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General

Target

2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe
Size

86KB
MD5

71034d6b98a6b00c00cb869649e34b0d
SHA1

e54a48946239b4f7dfeb670c4d4300fa05a96795
SHA256

908a481a810773fde5d8edcb83877fb2e0159ea80413d7ecb3672ac11aa69ab8
SHA512

04a63e3f16f14a5d613a8fc6a7b984efed5bd1a40b93fc42bc85cddf3ee19e57cc14d50c35b9b1cfafe683f2c504adff79d6181654dbd00ced5fcaf93a511445
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMghJO8:AnBdOOtEvwDpj6z9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000013a1a-11.dat	CryptoLocker_rule2
behavioral1/memory/2816-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/772-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/772-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000013a1a-11.dat	CryptoLocker_set1
behavioral1/memory/2816-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/772-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/772-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000a000000013a1a-11.dat	UPX
behavioral1/memory/2816-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/772-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/772-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
772	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2816	2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000a000000013a1a-11.dat	upx
behavioral1/memory/2816-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/772-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/772-26-0x0000000000500000-0x000000000050F000-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 2816 wrote to memory of 772	2816	2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe	28
PID 2816 wrote to memory of 772	2816	2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe	28
PID 2816 wrote to memory of 772	2816	2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe	28
PID 2816 wrote to memory of 772	2816	2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_71034d6b98a6b00c00cb869649e34b0d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:772

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
86KB

MD5
8a819eb925d50d7f1f073e1c33fb233b

SHA1
01624b67eb5c6ebb92c9588aab1a2f3d53d968c0

SHA256
52bbf898ad22e1223c59c9aadc0d321fb604d03344cade60ec4ff3478ce4696c

SHA512
119759f249819e344c06a443d3a8baaea1c7bf006e738da7ce40e9452fd0d653fe9ca8212a3e525d1776d85b155513b9dcba434d6b2d2a699d55eb04f046f3fb

Download Submit
memory/772-19-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/772-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/772-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/772-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2816-1-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2816-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2816-8-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2816-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download