13973e2be0369b77239771e69357c689098fdd9345383619e690444b0092dde3

General

Target

2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe
Size

63KB
MD5

74f56061a4c2ae9627f1cdacc736791d
SHA1

fd5a69d6db1d7553eadce9bd03f9726736903235
SHA256

13973e2be0369b77239771e69357c689098fdd9345383619e690444b0092dde3
SHA512

24a81d62482086f7ac5a282562231971d475032f69e1f5a4d01baf06b733687e5d32235d5f6a86a33b2693e0c737440cd94419edf15ff3abd64a1f8caf169d86
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5hRXTem:T6QFElP6n+gxmddpMOtEvwDpjwa3nTX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/3060-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a0000000139e6-11.dat	CryptoLocker_rule2
behavioral1/memory/3060-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3000-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3060-27-0x0000000000630000-0x0000000000640000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3000-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/3060-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a0000000139e6-11.dat	CryptoLocker_set1
behavioral1/memory/3060-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3000-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3060-27-0x0000000000630000-0x0000000000640000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3000-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/3060-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a0000000139e6-11.dat	UPX
behavioral1/memory/3060-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3000-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3060-27-0x0000000000630000-0x0000000000640000-memory.dmp	UPX
behavioral1/memory/3000-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3000	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3060	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3060-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a0000000139e6-11.dat	upx
behavioral1/memory/3060-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3000-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3060-27-0x0000000000630000-0x0000000000640000-memory.dmp	upx
behavioral1/memory/3000-28-0x0000000000500000-0x0000000000510000-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 3060 wrote to memory of 3000	3060	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	28
PID 3060 wrote to memory of 3000	3060	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	28
PID 3060 wrote to memory of 3000	3060	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	28
PID 3060 wrote to memory of 3000	3060	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
63KB

MD5
5104bd0736ca8dceb7fabf3a97a7f5b0

SHA1
13056c123a0a350b45e27be8b6635b5cbd755d73

SHA256
016b964f5024325993dfdde16be0e48548834d50ce6d7af265d8154d60911c67

SHA512
5e4639abaf2b9e224135a0f7d24bb8e72b50dac3bb3634e3697f9a1f2996852aa1ab3a54037281805aa771d642d640a0b3f01587e658c0d730d0a60c5e97abf9

Download Submit
memory/3000-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3000-19-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/3000-21-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3000-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3060-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3060-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3060-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3060-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3060-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3060-16-0x0000000000630000-0x0000000000640000-memory.dmp

Filesize
64KB

Download
memory/3060-27-0x0000000000630000-0x0000000000640000-memory.dmp

Filesize
64KB

Download

Analysis

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