d664dba3b79d06c9a4f4b4d835f7778e1103ad2778dae5e3b782411f950fca8f

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
02/05/2024, 01:09

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General

Target

2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
Size

32KB
MD5

d17a004e8e71293bb1b62009372aec4b
SHA1

a4b729d22023c085731e0e5eeda230c446c911ce
SHA256

d664dba3b79d06c9a4f4b4d835f7778e1103ad2778dae5e3b782411f950fca8f
SHA512

14687c0bc78b72d837410e282354b1068f115a256c920b719411250feef0510169d232a8752ea05b614794c0b4d4dae91d5cb713ccd6f72e5d1a4bf5b8bf594e
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXs:bFPmpiif/oc+vXs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001226e-11.dat	CryptoLocker_rule2
behavioral1/memory/1720-15-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2336-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x000b00000001226e-11.dat	UPX
behavioral1/memory/1720-15-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2336-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2336	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1720	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x000b00000001226e-11.dat	upx
behavioral1/memory/1720-15-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2336-26-0x0000000008000000-0x000000000800E000-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 1720 wrote to memory of 2336	1720	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	28
PID 1720 wrote to memory of 2336	1720	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	28
PID 1720 wrote to memory of 2336	1720	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	28
PID 1720 wrote to memory of 2336	1720	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2336

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\lossy.exe

Filesize
33KB

MD5
5ce73566a6771a62aed67f981e73b0ab

SHA1
4b1b82ecd1446068f75cb2860ab042f6efc511df

SHA256
c5aba6c3bdd4ab8922cc9a0bea075e45a062bfb14d289285ff0555d3518dfdfb

SHA512
145d92ebbf3e60f8015cc24ece58aaa4b0f06e687398b1d880599ab253f13542a9cb5d1561a0aeb67da7a0442ec1d29358a8c08c6148bf98cfeeb619a2c46a9f

Download Submit
memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1720-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1720-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1720-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1720-15-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2336-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2336-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2336-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download