59bc0b019810ec4e6332a03444b7c60d1b0ecf905a0c908137aa333875ed8308

General

Target

2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe
Size

103KB
MD5

6b36165427687ae9f1d2fdfd941f707d
SHA1

dcd2bc3adc2b4fc7d784f703c850cf53ab8a6aa1
SHA256

59bc0b019810ec4e6332a03444b7c60d1b0ecf905a0c908137aa333875ed8308
SHA512

9684bdd0aae3541b228ebf0b176136578231c23f815202e93a163e442d6a930e55e6cc6193795d0a43a4f496695276caa6eb129bf9edb74936045f2b3ae4d7e9
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gksq:1nK6a+qdOOtEvwDpjq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2068-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2068-14-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2068-15-0x00000000008F0000-0x0000000000900000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000012247-11.dat	CryptoLocker_rule2
behavioral1/memory/2500-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2500-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2068-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2068-14-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2068-15-0x00000000008F0000-0x0000000000900000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000012247-11.dat	CryptoLocker_set1
behavioral1/memory/2500-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2500-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2068-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2068-14-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x0009000000012247-11.dat	UPX
behavioral1/memory/2500-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2500-28-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2500	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2068	2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2068-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2068-14-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x0009000000012247-11.dat	upx
behavioral1/memory/2500-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2500-28-0x0000000000500000-0x000000000050F311-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 2068 wrote to memory of 2500	2068	2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe	28
PID 2068 wrote to memory of 2500	2068	2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe	28
PID 2068 wrote to memory of 2500	2068	2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe	28
PID 2068 wrote to memory of 2500	2068	2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_6b36165427687ae9f1d2fdfd941f707d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2500

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
104KB

MD5
5856a43801180be3ca6826f4f5797ed4

SHA1
1bf3327f7ca20b880876f5b6a69f2ca5d3daf154

SHA256
1d6ad0302ea799cc73f60d5272e744baed5646c5ae0806a52564c5b7d48329a7

SHA512
acc7107ca494f84d171f60a3915267027aacfdb5c7a5747016dae1ee28571b5c35a85a628f8ee9d293a4b1bb032f0da54914a4c72a1e49aa233f6ae4a2f2b07a

Download Submit
memory/2068-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2068-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2068-2-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2068-3-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2068-14-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2068-15-0x00000000008F0000-0x0000000000900000-memory.dmp

Filesize
64KB

Download
memory/2068-27-0x00000000008F0000-0x0000000000900000-memory.dmp

Filesize
64KB

Download
memory/2500-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2500-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2500-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2500-28-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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