09b160ed496778f3c77397dc324d5d64506a32f123a2f1baef83309555021ba8

General

Target

2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe
Size

55KB
MD5

189f2121ce4c1348ad00db7e8b9b99ac
SHA1

02ced61dbfc9e24833835b36242ea54dac50be03
SHA256

09b160ed496778f3c77397dc324d5d64506a32f123a2f1baef83309555021ba8
SHA512

191a655b852f27d463d3b65d4dec47c9b3101cb23be276648439fbadb40b4b878f68a127af43b7e9b187fc41847be3cc675972aee8bf5b62465dabc840d05663
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axc9C3:z6QFElP6n+gKmddpMOtEvwDpj9aYap3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2480-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012262-11.dat	CryptoLocker_rule2
behavioral1/memory/2480-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2828-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2828-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2480-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012262-11.dat	CryptoLocker_set1
behavioral1/memory/2480-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2828-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2828-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2480-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012262-11.dat	UPX
behavioral1/memory/2480-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2828-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2828-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2828	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2480	2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2480-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000012262-11.dat	upx
behavioral1/memory/2480-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2828-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2828-28-0x0000000000500000-0x0000000000510000-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 2480 wrote to memory of 2828	2480	2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe	28
PID 2480 wrote to memory of 2828	2480	2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe	28
PID 2480 wrote to memory of 2828	2480	2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe	28
PID 2480 wrote to memory of 2828	2480	2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_189f2121ce4c1348ad00db7e8b9b99ac_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2480
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2828

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
55KB

MD5
8fa6ee94f7c35dd0d2e7081077dd2269

SHA1
9c58e443b2bac0a91c15bc1de380ccbad218ec3e

SHA256
c7187e59a07c7fc0348ece67aa29db43a6dd0563ff73ebf15df2db28d52a1d6c

SHA512
b507c8ca38bfdc980a2312ec62ffb39ef2d66807e0fe67433378667201139e4c4f77d0f15e65ae1ec7b7f70cc7552c3073568ab7a96d4d7c60f419fbb79a161b

Download Submit
memory/2480-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2480-4-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2480-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2480-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2480-16-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/2480-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2480-27-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/2828-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2828-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2828-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2828-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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