3116b22af5baceb668e44ff3c21bbf0b4cec15e4976c647b14799269552be9af

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
15/05/2024, 18:27

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General

Target

2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe
Size

33KB
MD5

167f481a15c2e7a3f0ff2177a7f62ecd
SHA1

78785b0c9452a3e5d019722f3acfbdffe2f379c7
SHA256

3116b22af5baceb668e44ff3c21bbf0b4cec15e4976c647b14799269552be9af
SHA512

6d390d0e601e9bdb40c8311a3c3614c385bb04a5ae83ca56a718ee49070adb3dc8d7b67ed16626d1b64af47d7a302d02952783e8b0ef840b23d7da0768d46a29
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXkP:bFPmpiif/oc+vXkP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001431b-11.dat	CryptoLocker_rule2
behavioral1/memory/1720-13-0x00000000021D0000-0x00000000021DE000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1720-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2504-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x000b00000001431b-11.dat	UPX
behavioral1/memory/1720-13-0x00000000021D0000-0x00000000021DE000-memory.dmp	UPX
behavioral1/memory/1720-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2504-27-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2504	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1720	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe

UPX packed file 5 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/0x000b00000001431b-11.dat	upx
behavioral1/memory/1720-13-0x00000000021D0000-0x00000000021DE000-memory.dmp	upx
behavioral1/memory/1720-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2504-27-0x0000000008000000-0x000000000800E000-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 2504	1720	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	28
PID 1720 wrote to memory of 2504	1720	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	28
PID 1720 wrote to memory of 2504	1720	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	28
PID 1720 wrote to memory of 2504	1720	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_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:2504

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
25976c8c41bf16ec7b707a19c8e39fe2

SHA1
e3bec8ec496c46f4c7ddd04a1b118d0a4fbdb3e5

SHA256
cf056757708154eff3cea06bbbde9acb312a69454326630238160d3255311c05

SHA512
99268d87dc5e9d5439d1d618ce019009125c3fa7bb32cb4b1eb0bdcd887261c5473ddfb6dd440c05f359140edbc119785f0c5a935b315a508efcb1ea480e0aea

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

Filesize
56KB

Download
memory/1720-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1720-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1720-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1720-13-0x00000000021D0000-0x00000000021DE000-memory.dmp

Filesize
56KB

Download
memory/1720-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2504-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2504-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2504-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download