b672bef7b081c2ba59d08ff757c68ca63d9009bcc4e24eb1cd8ff5b8d7d55105

General

Target

2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe
Size

97KB
MD5

b23fd6f32c2c50852e809f6ff2d70606
SHA1

ddbf452b86bb60dff2a925d00314a120a0b11749
SHA256

b672bef7b081c2ba59d08ff757c68ca63d9009bcc4e24eb1cd8ff5b8d7d55105
SHA512

ef8dd5db25e3a36f65cdcc6fa994ed33807eba8a5d1298c3b528047e083292822c9222f344e3befa69feb54ea82c9158278fafbb59c7387ca67359bd94d72d99
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01l:AnBdOOtEvwDpj6zn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2176-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3016-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2176-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2176-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3016-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2176-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2176-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3016-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2176-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2176 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe

pid process

3016 2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe

pid	process
2176	asih.exe

pid	process
3016	2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2176-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3016-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2176-27-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe

description	pid	process	target process
PID 3016 wrote to memory of 2176	3016	2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe	asih.exe
PID 3016 wrote to memory of 2176	3016	2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe	asih.exe
PID 3016 wrote to memory of 2176	3016	2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe	asih.exe
PID 3016 wrote to memory of 2176	3016	2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_b23fd6f32c2c50852e809f6ff2d70606_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2176

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

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Downloads

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

Filesize
97KB

MD5
f8a7847315e11e4a78c1d5f627a270a4

SHA1
7083c9849d7b5e7cc711054926ad34a0492a5183

SHA256
6143b7a5ea4b5319e1fbb8e22b3b4f212d0fee2225b5d0862c1e5b9a8be74340

SHA512
6ab6686693576fdf2431c12f16ff90bd7fc0237732acac93b59530310fe348edd2bf962cd974d74d10451fe6345038649842846dafadaf238e6bcbeb9e10ba45

Download Submit
memory/2176-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2176-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2176-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2176-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3016-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3016-3-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3016-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3016-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads