60ac3ba5b4cb94ecfc94e682bc30dfaf8b58671b0e43ff147bdd7f56afa04608

General

Target

2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe
Size

65KB
MD5

f3293df4d1a7668bc663213adfc6d26a
SHA1

9644e6059e12ee5faab28a1df16cd7cda24ec8ad
SHA256

60ac3ba5b4cb94ecfc94e682bc30dfaf8b58671b0e43ff147bdd7f56afa04608
SHA512

d1d6a529973378bed4f47942595000faeeb98b25a2fba4d86e8f8ed581304723d56d649e0c1b04bfa3a6143742276280b37acd5756140170b80542c2b466dfdd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyU:1nK6a+qdOOtEvwDpj3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1444-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015cff-11.dat	CryptoLocker_rule2
behavioral1/memory/1444-13-0x0000000002270000-0x0000000002280000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1444-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1444-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000015cff-11.dat	CryptoLocker_set1
behavioral1/memory/1444-13-0x0000000002270000-0x0000000002280000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1444-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1444-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b000000015cff-11.dat	UPX
behavioral1/memory/1444-13-0x0000000002270000-0x0000000002280000-memory.dmp	UPX
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1444-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2520-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2520	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1444	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1444-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b000000015cff-11.dat	upx
behavioral1/memory/1444-13-0x0000000002270000-0x0000000002280000-memory.dmp	upx
behavioral1/memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1444-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2520-27-0x0000000000500000-0x000000000050F311-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 1444 wrote to memory of 2520	1444	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	28
PID 1444 wrote to memory of 2520	1444	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	28
PID 1444 wrote to memory of 2520	1444	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	28
PID 1444 wrote to memory of 2520	1444	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1444
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2520

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
66KB

MD5
bb6b0d6b39512145f633c8484855ef2e

SHA1
09b572c0b24defb8a4c462a440a241ba44a7924a

SHA256
adb00da8f10cc5549324d938db78d9d2b1ab17eeb8a3c53b6b92a72fb7cb8780

SHA512
0b58dbe0053bd2db51c1cb87ea37e0f4f910e45665e8c72657b0c3c4dccecb95226ffb4b9679b8a800d15d4fa9be70da73e2e6115477535853ca687712f68ad7

Download Submit
memory/1444-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1444-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1444-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1444-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1444-13-0x0000000002270000-0x0000000002280000-memory.dmp

Filesize
64KB

Download
memory/1444-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2520-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2520-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2520-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2520-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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