9b4ded9cd22b1f556db516b6a358426bbe08183e23bc60e99cb3f8507fe88a16

General

Target

2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe
Size

67KB
MD5

33837766833c0334fadf8cef837bfa26
SHA1

77d70b6304c203bf11e49f4017b8c6d208864faa
SHA256

9b4ded9cd22b1f556db516b6a358426bbe08183e23bc60e99cb3f8507fe88a16
SHA512

f94cdbee705e065cdd2327d003c1035eb50166f655a2062164e0a858e0002e11c4927d915d613cfeeceda8809ee17a63f52fa67f0ca62c4ded3d11fa24d25cd4
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PR:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001650c-11.dat	CryptoLocker_rule2
behavioral1/memory/2060-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2060-29-0x00000000005E0000-0x00000000005EF000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a00000001650c-11.dat	CryptoLocker_set1
behavioral1/memory/2060-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3044-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2060-29-0x00000000005E0000-0x00000000005EF000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000a00000001650c-11.dat	UPX
behavioral1/memory/2060-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3044-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3044	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2060	2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000a00000001650c-11.dat	upx
behavioral1/memory/2060-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3044-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2060 wrote to memory of 3044	2060	2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe	28
PID 2060 wrote to memory of 3044	2060	2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe	28
PID 2060 wrote to memory of 3044	2060	2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe	28
PID 2060 wrote to memory of 3044	2060	2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_33837766833c0334fadf8cef837bfa26_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3044

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
67KB

MD5
62d2a3a71f4b771e052e9119a604e5e0

SHA1
5a3b52e049a44cd7398926b8d822d092d337e264

SHA256
6bd8e76fc84c673044cc9a0294ae7c4069da13d90f96659b0672f914c0817540

SHA512
3ea9aa84ff69775c6cee775355e926ca9677afb0a8ac2e744746b33ab24c6ff378fd02621cb99ec727bc1994ba4da15dea47f41bec3a861167fbb465f6476d13

Download Submit
memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2060-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2060-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2060-8-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2060-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2060-16-0x00000000005E0000-0x00000000005EF000-memory.dmp

Filesize
60KB

Download
memory/2060-29-0x00000000005E0000-0x00000000005EF000-memory.dmp

Filesize
60KB

Download
memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3044-19-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/3044-26-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/3044-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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