b1d6cc703e9d3a36ea9b51b6566ffb98f77ee5a0dbd68614d9f10a13900e3d4d

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 02:51

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General

Target

2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe
Size

45KB
MD5

db99634f581c422483cb54cb9a574e0c
SHA1

f877958b1a1d81306db2a68135f605043ee6175d
SHA256

b1d6cc703e9d3a36ea9b51b6566ffb98f77ee5a0dbd68614d9f10a13900e3d4d
SHA512

2a8c19034eb984d72de702fe3d5b4aceef5fae1f5d1c0bf6d1f789d527aab3d5b5ce41467d9654e16ad1db7cdcaa5c3cfe02523fa4e25b6b6037bb99fc3e897d
SSDEEP

768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3Kx2:o1KhxqwtdgI2MyzNORQtOflIwoHNV2Xb

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\hurok.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\hurok.exe	CryptoLocker_set1

Executes dropped EXE 1 IoCs

Processes:

hurok.exe

pid process

2628 hurok.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe

pid process

2236 2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of UnmapMainImage 2 IoCs

Processes:

2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exehurok.exe

pid process

2236 2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe
2628 hurok.exe

pid	process
2628	hurok.exe

pid	process
2236	2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe

pid	process
2236	2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe
2628	hurok.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe

description	pid	process	target process
PID 2236 wrote to memory of 2628	2236	2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe	hurok.exe
PID 2236 wrote to memory of 2628	2236	2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe	hurok.exe
PID 2236 wrote to memory of 2628	2236	2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe	hurok.exe
PID 2236 wrote to memory of 2628	2236	2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe	hurok.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_db99634f581c422483cb54cb9a574e0c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2236

C:\Users\Admin\AppData\Local\Temp\hurok.exe
"C:\Users\Admin\AppData\Local\Temp\hurok.exe"
2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:2628

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\hurok.exe
Filesize
45KB

MD5
1be9e58349fa03d51abf3bbb6d26fa7d

SHA1
5b617a397e1cc37385921867fe85826117a4e1ef

SHA256
7db44e99acfdf865113d722dce5e9d16e67f6bc31d698adcc8ab567700cb87a4

SHA512
723a651419aa43b9e25830c4e637b7c00933d6c47ccc818a9f35fd52eff096f5a3b9c9736e909c078e0339579ef3438591dac4a55a41b9fd6436e4845f589446

Download Submit
memory/2236-0-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2236-1-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2236-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2628-23-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download