770a3f28cdc9197e7b4370fa83f82255ce30c7602bb0ee8aa3204e65dbd08f41

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
21/05/2024, 15:42

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General

Target

2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe
Size

52KB
MD5

449674d25fbe61bf585eb6f55d89e35d
SHA1

8900bdf30389cec640bf509d0612127aca686c42
SHA256

770a3f28cdc9197e7b4370fa83f82255ce30c7602bb0ee8aa3204e65dbd08f41
SHA512

3b98a2314fb22ce77b3741710f8dcc6f257b5788a5d2fa5ca9b6cb3a318a7615408dc7686152cd599c45d8832da8241fd1df07be3bfe24804476996198ea67c3
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOq:bODOw9acifAoc+vF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2620-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000144e0-11.dat	CryptoLocker_rule2
behavioral1/memory/2620-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1696-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1696-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2620-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000b0000000144e0-11.dat	UPX
behavioral1/memory/2620-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/1696-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/1696-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1696	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2620	2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2620-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000b0000000144e0-11.dat	upx
behavioral1/memory/2620-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/1696-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/1696-26-0x0000000008000000-0x000000000800F000-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 2620 wrote to memory of 1696	2620	2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe	28
PID 2620 wrote to memory of 1696	2620	2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe	28
PID 2620 wrote to memory of 1696	2620	2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe	28
PID 2620 wrote to memory of 1696	2620	2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_449674d25fbe61bf585eb6f55d89e35d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1696

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
52KB

MD5
bb36f721a6d5ddb6acb58e4093a065c8

SHA1
aece26c409c4dd21a3f2d52386cdfa3c62d06f85

SHA256
53e9b6d52929328830a6794675cf1720cf764f312f16638c5325e93c9f826e8d

SHA512
5099b7461e48336ee707b3f6bf41cb1430ac94679c8c0e4e2ca379f04f4c1237891e74f4814f37b08858276e5bb07dc3fe4ba55bde3bf97f3fca2c20194307f9

Download Submit
memory/1696-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1696-18-0x0000000001C90000-0x0000000001C96000-memory.dmp

Filesize
24KB

Download
memory/1696-25-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1696-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2620-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2620-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2620-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2620-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2620-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download