4ef004782e1957f20664c756ff0e4134065d1a541ef514f1279496d19a45ace3

General

Target

2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe
Size

78KB
MD5

ec966fca1153abe7af090ac1e2ca304b
SHA1

b03af9f4eb2816662106f7b6581eb967bbdc890f
SHA256

4ef004782e1957f20664c756ff0e4134065d1a541ef514f1279496d19a45ace3
SHA512

3e7bfe41cd1f558d65762501944c6fe95bf141d10acdac7fa5b3d580940bf60dd22df9a6d12d0b08df9c7fd28f6533abad3071ee04f67f59472d333520316f2a
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qx:zCsanOtEvwDpjF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0008000000012254-11.dat	CryptoLocker_rule2
behavioral1/memory/2348-12-0x00000000006B0000-0x00000000006C0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2348-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2556-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0008000000012254-11.dat	CryptoLocker_set1
behavioral1/memory/2348-12-0x00000000006B0000-0x00000000006C0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2348-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2556-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0008000000012254-11.dat	UPX
behavioral1/memory/2348-12-0x00000000006B0000-0x00000000006C0000-memory.dmp	UPX
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2348-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2556-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2556	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2348	2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0008000000012254-11.dat	upx
behavioral1/memory/2348-12-0x00000000006B0000-0x00000000006C0000-memory.dmp	upx
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2348-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2556-27-0x0000000000500000-0x0000000000510000-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 2348 wrote to memory of 2556	2348	2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe	28
PID 2348 wrote to memory of 2556	2348	2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe	28
PID 2348 wrote to memory of 2556	2348	2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe	28
PID 2348 wrote to memory of 2556	2348	2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_ec966fca1153abe7af090ac1e2ca304b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2556

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\misid.exe

Filesize
78KB

MD5
95c1de8c35b75cd5dd50698a2755886e

SHA1
61d3ec1a760daee1a63e5eb5abf983157fc568e3

SHA256
73fc87fee2aeb68ebf9f6be4484cf547c223c22d8094225e7e154b21c35cd3ac

SHA512
bc7df83e6b1719557705eb806eeb6f8309060558b52de83c20350b194ca30e15949ca07e1241769d279a72afea4f6fbff7545834e1579201e3af55830fd9c745

Download Submit
memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2348-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2348-3-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2348-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2348-12-0x00000000006B0000-0x00000000006C0000-memory.dmp

Filesize
64KB

Download
memory/2348-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2556-20-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2556-19-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2556-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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