71e5377e6b5a8d673f6da3b73f9241c24c24fe508a6aab81e96a845027507194

General

Target

2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe
Size

70KB
MD5

599186367122c5efcf79fac473b30f4f
SHA1

fe1e1079ff4ecf63617d57c927ef96dcd9971326
SHA256

71e5377e6b5a8d673f6da3b73f9241c24c24fe508a6aab81e96a845027507194
SHA512

3b2591834d848c42b569ad5f25c51785739a603c287fb19bd180d8fa7e056ad3dcdcc45104f45d8469b4b752750af9ca1ac0c44cdbac5931ed6fceda8460812f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalp:1nK6a+qdOOtEvwDpjI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001225f-11.dat	CryptoLocker_rule2
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2220-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1640-15-0x0000000000650000-0x0000000000660000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2220-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001225f-11.dat	CryptoLocker_set1
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2220-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1640-15-0x0000000000650000-0x0000000000660000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2220-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c00000001225f-11.dat	UPX
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2220-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2220-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2220	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1640	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c00000001225f-11.dat	upx
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2220-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2220-27-0x0000000000500000-0x000000000050F311-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 1640 wrote to memory of 2220	1640	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	28
PID 1640 wrote to memory of 2220	1640	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	28
PID 1640 wrote to memory of 2220	1640	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	28
PID 1640 wrote to memory of 2220	1640	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2220

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
70KB

MD5
20afa7d530ee79e6df00cc9bc5cb839c

SHA1
43bf7cb6c437341cf1b8a365b08784e35fbfb10a

SHA256
391a8c7fe378676912c43c67bf0d6eefae3428d5dc84a6e26b63732e38276e9e

SHA512
0c4e8904152e2546bb46609ae703f3244e2eb2b9692373d6a971088ffb8ab7b830b0d3ff3fa3ed104d3732fa90b0c12d81bc87841da2df0a9e603a75560260b4

Download Submit
memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1640-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1640-3-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1640-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1640-15-0x0000000000650000-0x0000000000660000-memory.dmp

Filesize
64KB

Download
memory/2220-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2220-19-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2220-23-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2220-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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