3bb53540291c85684477c6b7cf7785ecc5dbe74efbc0ee99428545a8165c60c1

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05/04/2024, 21:34

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General

Target

2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe
Size

71KB
MD5

8781a70d11fecd913838d44891001b74
SHA1

908e2e3ef3127313f0d7d89c192cd4b4ed0cec89
SHA256

3bb53540291c85684477c6b7cf7785ecc5dbe74efbc0ee99428545a8165c60c1
SHA512

5f78b34f9471b346f08539dc7be69e8790f60f362d2af537022bd4130aaa8acc664359a42c0cb558e47ea34751571513e10d78cca505d887612e2f89a96ac2fe
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBQ:z6a+CdOOtEvwDpjQ+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012254-11.dat	CryptoLocker_rule2
behavioral1/memory/2796-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2880-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012254-11.dat	CryptoLocker_set1
behavioral1/memory/2796-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2880-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012254-11.dat	UPX
behavioral1/memory/2796-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2880-20-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2880	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2796	2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000012254-11.dat	upx
behavioral1/memory/2796-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2880-20-0x0000000000500000-0x0000000000510000-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 2796 wrote to memory of 2880	2796	2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe	28
PID 2796 wrote to memory of 2880	2796	2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe	28
PID 2796 wrote to memory of 2880	2796	2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe	28
PID 2796 wrote to memory of 2880	2796	2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_8781a70d11fecd913838d44891001b74_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2880

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\asih.exe

Filesize
72KB

MD5
a39905f7ce9d8404535072ece29e1c97

SHA1
c2ac5d2625dfa10971607e068fb33f6d7e805d9f

SHA256
3932f3db5cf8a51a35e49553330a7e019a6f698d2b26f66a5b75cfee358ed028

SHA512
aa7b651de4be9d244dfd36638fd5874549134476f77fe0d41540192bf80aebea06748d77fcddd3505c2da5bcd90dcda71cfcdf6039b7b9c2759d3b23375d7c2a

Download Submit
memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2796-1-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2796-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2796-9-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2796-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2880-17-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2880-18-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2880-20-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download