43e8fc82491a5f6795567a0e56091db77b36c5e9a3bfc96da2da548364966c0c

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
26/03/2024, 22:40

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General

Target

2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe
Size

64KB
MD5

bf2bbe85a02d02b96f9f630d1ad6b54a
SHA1

433e0a4cbf39ef0818d707cfa610c820720fa95c
SHA256

43e8fc82491a5f6795567a0e56091db77b36c5e9a3bfc96da2da548364966c0c
SHA512

72c2cb288d05e174a1443701835375cf5badd03608407c1cd9788c2eb305ea007238cccb1ee2f21611f257eec725fcef4c26a7c96987ad31a3b4b4aee1e04955
SSDEEP

768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEKIRo:6j+1NMOtEvwDpjr8ox8UDEKKo

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000013a71-11.dat	CryptoLocker_rule2
behavioral1/memory/2136-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3052-21-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000013a71-11.dat	CryptoLocker_set1
behavioral1/memory/2136-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3052-21-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/files/0x000a000000013a71-11.dat	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2136-15-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/3052-21-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress

Executes dropped EXE 1 IoCs

pid	Process
3052	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2136	2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe

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 2136 wrote to memory of 3052	2136	2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe	28
PID 2136 wrote to memory of 3052	2136	2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe	28
PID 2136 wrote to memory of 3052	2136	2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe	28
PID 2136 wrote to memory of 3052	2136	2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_bf2bbe85a02d02b96f9f630d1ad6b54a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
64KB

MD5
f9f1277338f3de5a4ffdce831dc3e405

SHA1
75ac42f3274daa9e8da85e3f973aa79e548b6328

SHA256
e81a201182d39031df26884b136f36b46128d48f8c12b68163faf58bf71b8f9a

SHA512
b588af3fc3bbcfa24b768cb66e562ad00b7fa5acd168acfdf0efc32610a02b51858801751c15c8f9e91aecc3b732603f2395db5db67dbcbf3dbf0798c70d5bb8

Download Submit
memory/2136-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2136-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2136-3-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2136-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2136-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3052-17-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/3052-19-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/3052-21-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download