4eb2fec9afa90fd0e2dcf044f0d0d7b9df8eac6d8b6a48c8e31bf86ff784db4c

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
08/06/2024, 03:26

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General

Target

2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe
Size

52KB
MD5

638947c6a48ee05b1c2a45265ccce8fb
SHA1

44fba1964585c8c502843fd0dec0482da743e408
SHA256

4eb2fec9afa90fd0e2dcf044f0d0d7b9df8eac6d8b6a48c8e31bf86ff784db4c
SHA512

e34e4b2d25d531558191bf4407ff0c364b3b1a230d63a469514b369ee26b5271e6a24f98952382c159b1dff2b17f16826171a7689b445eb647c9c41c4a393ba9
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOJ:bODOw9acifAoc+vu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2748-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000014323-11.dat	CryptoLocker_rule2
behavioral1/memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2748-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2856-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2748-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000b000000014323-11.dat	UPX
behavioral1/memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2748-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2856-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2856	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2748	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2748-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000b000000014323-11.dat	upx
behavioral1/memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2748-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2856-26-0x0000000008000000-0x000000000800F000-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 2748 wrote to memory of 2856	2748	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	28
PID 2748 wrote to memory of 2856	2748	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	28
PID 2748 wrote to memory of 2856	2748	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	28
PID 2748 wrote to memory of 2856	2748	2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_638947c6a48ee05b1c2a45265ccce8fb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2856

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
181e5d19883ea229fdd173e3bd8d9026

SHA1
45dbf1bb17a1dac42f55accf344fb3f0b8662c04

SHA256
01f6d23e951cc2458dad097da05378a5ee27aa2c0ae8c1a5ab8c242674653c69

SHA512
c3796553ce9286f38ae84e411241cf20d3c621e4caeeac517618824082a6071e844d425b9609edddcdd0837c83d310ab2ba9d066e13ef1bc244bf5839bcbf75b

Download Submit
memory/2748-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2748-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2748-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2748-9-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2748-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2856-18-0x0000000001B30000-0x0000000001B36000-memory.dmp

Filesize
24KB

Download
memory/2856-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2856-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download