946b33e09f78d4e498539f7f3a21bcec0956f4ff5731451ddbacb7ff527252f5

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 17:55

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General

Target

2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe
Size

38KB
MD5

7931c7a2457da7124da40c942d2aaf9f
SHA1

3b80cd57196649cd46ae44aa6cddd7ddc1b5c739
SHA256

946b33e09f78d4e498539f7f3a21bcec0956f4ff5731451ddbacb7ff527252f5
SHA512

aed9d26bde6ffd5d4fce70e11e821dfe9c4a758d818a4d75587610e5877b796a2d8d36d2548f97b3a9382a9d462812759fda2ada25f04f7dc414d7ca4c2db003
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxur:b/yC4GyNM01GuQMNXw2PSjHPbSuYlC

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x000a000000012233-14.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid	Process
2980	retln.exe

Loads dropped DLL 1 IoCs

Processes:

2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe

pid	Process
3036	2024-01-25_7931c7a2457da7124da40c942d2aaf9f_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:

2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exeretln.exe

pid	Process
3036	2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe
2980	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe

description	pid	Process	procid_target
PID 3036 wrote to memory of 2980	3036	2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe	28
PID 3036 wrote to memory of 2980	3036	2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe	28
PID 3036 wrote to memory of 2980	3036	2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe	28
PID 3036 wrote to memory of 2980	3036	2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_7931c7a2457da7124da40c942d2aaf9f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3036
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2980

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
38KB

MD5
54935ab33309ed8ce2fbb92551b5274f

SHA1
d0b3557763afcb86e5653460162a20e5e075be19

SHA256
450718f20ba7ce7388e3220aa0bda6b4d39041547a8f2571821b54254be37e6a

SHA512
bc97269116d33129606ddfea6b42f0376ffd2db6c3fa85a6d28ff52d625a62f08daaf32a23cd125c52ff2c4f2a73fa282b495e4e2bc5aa214fbb5cee834af2ce

Download Submit
memory/2980-18-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/3036-0-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/3036-2-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/3036-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download