bb9be337fea96a2b120f0dab549df6dae6bcc1a9be5b03e1bc14507e3e3f74ea

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 03:47

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General

Target

2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe
Size

51KB
MD5

87002858a71e6bb465cf060b021019d0
SHA1

9bcc9c36a806102e1a69617e2267fe7abb08506e
SHA256

bb9be337fea96a2b120f0dab549df6dae6bcc1a9be5b03e1bc14507e3e3f74ea
SHA512

83efcb8c6cd403563c988ec8bace255ad619332044d25f6e8c9735a576a65a38bc05d69224ffd2315f5d6b2a805ca877129e6ed4206408e80116dc38f929637c
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtXiQ:bODOw9acifAoc+vXiQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2044-8-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000013a7c-11.dat	CryptoLocker_rule2
behavioral1/memory/2548-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2548-25-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2044-8-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000c000000013a7c-11.dat	UPX
behavioral1/memory/2548-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2548-25-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2548	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2044	2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2044-8-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000c000000013a7c-11.dat	upx
behavioral1/memory/2548-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2548-25-0x0000000008000000-0x000000000800F000-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 2044 wrote to memory of 2548	2044	2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe	28
PID 2044 wrote to memory of 2548	2044	2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe	28
PID 2044 wrote to memory of 2548	2044	2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe	28
PID 2044 wrote to memory of 2548	2044	2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_87002858a71e6bb465cf060b021019d0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2548

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
51KB

MD5
4e9c1941b34e78c2b99ec36e499120d9

SHA1
e4c9bf5862c91bacb6485fcd0dfc3ab03fa4629d

SHA256
a9512b3fec23091729cfc4782b5b948dc651e9a836d2a527f3b0c7c42ccf2f95

SHA512
26e532fc068bc865212d59d47867676db452b4e033cce732a95d11f0544f566628046da47bc33658815b4ee8a1f8f995113c499275f2c834b9683cd2e66840bf

Download Submit
memory/2044-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2044-1-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/2044-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2044-8-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2548-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2548-17-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2548-24-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2548-25-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download