3e7dcc26718ef626001b2886ecd99e272ad1b8780b32ab36bada2bfb0a646afb

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 05:49

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General

Target

2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe
Size

53KB
MD5

4bd612d5f6e754063ae0f2b41af31914
SHA1

b66c0a5c4f6b0eac6fc21a0a51ff1b0594510258
SHA256

3e7dcc26718ef626001b2886ecd99e272ad1b8780b32ab36bada2bfb0a646afb
SHA512

db449c051e518e267320ebae0c11010010431b97016916a087bef9fc3c183cc9cdaa2293b1c506f1681b6d55cd1e522ac3b6273371fc1927d7684266473844ad
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXI:bODOw9acifAoc+vD

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/1612-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012280-11.dat	CryptoLocker_rule2
behavioral1/memory/1612-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3040-25-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/1612-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000a000000012280-11.dat	UPX
behavioral1/memory/1612-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3040-25-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3040	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1612	2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1612-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000a000000012280-11.dat	upx
behavioral1/memory/1612-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3040-25-0x0000000008000000-0x000000000800F000-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 1612 wrote to memory of 3040	1612	2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe	28
PID 1612 wrote to memory of 3040	1612	2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe	28
PID 1612 wrote to memory of 3040	1612	2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe	28
PID 1612 wrote to memory of 3040	1612	2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4bd612d5f6e754063ae0f2b41af31914_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3040

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
53KB

MD5
d404bd23e5a71e392e83f451be15406b

SHA1
0553f8376f6396b8dc15e765ad78e8f1db4a7a76

SHA256
84576dafb0dcb91fb1af41752754d0e3c78c81d24a77e956829a32fb8c2387a0

SHA512
de8fd7c8150d501e6aa94e65e88b2ed5057ecc3c0db6e20e267a26f846fd6af099ce0b46f119eb261d1a15d9c34440bf4452b13175520e1aa0583b702fcbf8f8

Download Submit
memory/1612-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1612-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1612-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1612-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1612-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3040-17-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3040-24-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3040-25-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download