c52388c54a21a35372f358c0444701ef7961b782a91720477cb1a7b1484aa362

General

Target

2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe
Size

61KB
MD5

8ff4801061c00f7f42cafa999a308b82
SHA1

f56ce753fd295e07ed813ce49d8925f118de5661
SHA256

c52388c54a21a35372f358c0444701ef7961b782a91720477cb1a7b1484aa362
SHA512

359287fb5a795becf13edfc1ed2782770b036ad8bac0ecf08ea40f0e0491a9aac25950014d0addddae5d1f2b22727b5408f060f27e3d5c20f87f151b1bade564
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKY:P8mnK6QFElP6n+gymddpMOtEvwDpjYhY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000014abe-11.dat	CryptoLocker_rule2
behavioral1/memory/1684-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1644-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1644-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000014abe-11.dat	CryptoLocker_set1
behavioral1/memory/1684-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1644-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1644-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x0009000000014abe-11.dat	UPX
behavioral1/memory/1684-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1644-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1644-28-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1644	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1684	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x0009000000014abe-11.dat	upx
behavioral1/memory/1684-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1644-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1644-28-0x0000000000500000-0x000000000050F311-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 1684 wrote to memory of 1644	1684	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	28
PID 1684 wrote to memory of 1644	1684	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	28
PID 1684 wrote to memory of 1644	1684	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	28
PID 1684 wrote to memory of 1644	1684	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1644

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
61KB

MD5
aa17b691558df402ea3f536b6f32a51b

SHA1
9139ab1846de039388a70e925215dabee30f077e

SHA256
fa23a8d6a39af82928fb6271bb2fad80014ac49c9018f4546dc85bd41184ffb0

SHA512
53fd01ac68b45b8ede03bff89ff8b143d3a765e9b08b879f6aebe530ec9d8cf18f7479fae4039d733b1044132d4ef733b8f7e1177efbdb620112987c3f7d0c9c

Download Submit
memory/1644-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1644-21-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1644-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1644-28-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1684-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1684-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1684-2-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/1684-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1684-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1684-16-0x00000000006D0000-0x00000000006E0000-memory.dmp

Filesize
64KB

Download
memory/1684-27-0x00000000006D0000-0x00000000006E0000-memory.dmp

Filesize
64KB

Download

Analysis

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