c58a25a4d00c0dba3232c97c9813d3dc6f1eb0666cf556aae59c83f876029b0e

General

Target

2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe
Size

62KB
MD5

99cf265bfcdc606e7eec424693ba3738
SHA1

83a50c9089b4fc1ccf8daa0a0de034e436be1f78
SHA256

c58a25a4d00c0dba3232c97c9813d3dc6f1eb0666cf556aae59c83f876029b0e
SHA512

d72900ef01d5df6358adea8a351967221c09e36b4403a4c37eb6db2837d1697bfd4f09be3f30af914dc369d803cdcb26177695361ac1463317910f52de064a8f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8M:1nK6a+qdOOtEvwDpjk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001650c-11.dat	CryptoLocker_rule2
behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1752-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a00000001650c-11.dat	CryptoLocker_set1
behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1752-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000a00000001650c-11.dat	UPX
behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1752-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	UPX
behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3036	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1752	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000a00000001650c-11.dat	upx
behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1752-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	upx
behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F311-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 1752 wrote to memory of 3036	1752	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	28
PID 1752 wrote to memory of 3036	1752	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	28
PID 1752 wrote to memory of 3036	1752	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	28
PID 1752 wrote to memory of 3036	1752	2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_99cf265bfcdc606e7eec424693ba3738_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3036

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
62KB

MD5
7340135fc85db5a113a994734ec46460

SHA1
6d35ee8176f93315e5d1649d2662edd4e7295d17

SHA256
bbbb06dd888cb5826cc77d3213723c1b67701ce6ec85b2ef8159685afbd81ba3

SHA512
d8da0a08f23f8f9ba1f00769df278e6d8b6e3e7ca41acf5850cd5e5a9f8f65cc178a347f3b3938e4b2dc407e23c3a0f664c9285dc31a5340ab64db65b9b28499

Download Submit
memory/1752-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1752-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1752-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1752-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1752-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/3036-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3036-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/3036-20-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/3036-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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