f9548ecfa50579fbcaf836d1fd7324baf09f1175bfba2ced83d7f4cacfc6f5c8

General

Target

2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe
Size

65KB
MD5

b0d78fa1303bfbf47502187938ce1e59
SHA1

08810d8a1ea5810388ce848287321c5cb38cadaa
SHA256

f9548ecfa50579fbcaf836d1fd7324baf09f1175bfba2ced83d7f4cacfc6f5c8
SHA512

905cc0016dea721ab53c514c9dce3f476c33a2ff1bcefbd9bac2320978c57ff28b362059ab0853cf4e1c5050fca8ed9bd01320f8ba51a12abe3b00b35fba7997
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDYV:1nK6a+qdOOtEvwDpju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2628-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000f0000000122de-11.dat	CryptoLocker_rule2
behavioral1/memory/2628-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2628-12-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2604-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2628-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000f0000000122de-11.dat	CryptoLocker_set1
behavioral1/memory/2628-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2628-12-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2604-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2628-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000f0000000122de-11.dat	UPX
behavioral1/memory/2628-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2628-12-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	UPX
behavioral1/memory/2604-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2604	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2628	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2628-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000f0000000122de-11.dat	upx
behavioral1/memory/2628-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2628-12-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	upx
behavioral1/memory/2604-26-0x0000000000500000-0x000000000050F311-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 2628 wrote to memory of 2604	2628	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	29
PID 2628 wrote to memory of 2604	2628	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	29
PID 2628 wrote to memory of 2604	2628	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	29
PID 2628 wrote to memory of 2604	2628	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2604

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
65KB

MD5
a095da4bcfe1699bf46415d07f2b7920

SHA1
840bd3526536169761c0c13f38e3daac1b9240ba

SHA256
d5589d43b6811dda76d8b256bdd6604f87173436ae35453c73812a8c3ca6748c

SHA512
8ed6394b195c30ff36d1664cd8de7cf40eb6ef8b88687e9580cadb5d1ace1b23fec0bee1149d231bcd8fe7ea8b892d75ca110b7ca9bd90bd418b37b1abf88022

Download Submit
memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2604-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2628-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2628-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2628-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2628-4-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2628-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2628-12-0x0000000001ED0000-0x0000000001EE0000-memory.dmp

Filesize
64KB

Download

Analysis

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