3eeb45eef124233f91a01b0fc7519c765e544a43489d45cf8a79831be8928a91

Analysis

max time kernel
146s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2024, 20:54

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General

Target

2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe
Size

76KB
MD5

ac098d03a3b0f08215270631fba1bd18
SHA1

8479eefe315c755c0cf642a30cdb88e831d1ee08
SHA256

3eeb45eef124233f91a01b0fc7519c765e544a43489d45cf8a79831be8928a91
SHA512

dd3f6a633a5bde353cf152bbf023658e0615ea67514f99f467339686d27f53e9893a4b49a5632f405f71a391adcbffc44fe1feb50cf87a433ce5d36e17152ef8
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxBR:T6a+rdOOtEvwDpjNtHPQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023260-13.dat	CryptoLocker_rule2
behavioral2/memory/3264-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023260-13.dat	CryptoLocker_set1
behavioral2/memory/3264-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023260-13.dat	UPX
behavioral2/memory/3264-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/732-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
732	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023260-13.dat	upx
behavioral2/memory/3264-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/732-26-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 3264 wrote to memory of 732	3264	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	91
PID 3264 wrote to memory of 732	3264	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	91
PID 3264 wrote to memory of 732	3264	2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_ac098d03a3b0f08215270631fba1bd18_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3264
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:732

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1344 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:4560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
76KB

MD5
eabdfe2a6d6491e2cc4b64e5ebf78580

SHA1
53484f2933192dd91107c0132897ae3e29864085

SHA256
2d8ae94475c76be5945f58838a3a72551de9c4e9023460dbf481297d169fa087

SHA512
cb25ce3470921eff370336b39cf97ffcec61b8d5aef0a4d1e424fbecdf82c78a0be665a016cfbbf959b70ebf79f0a30951f20c6cf63281192f24d2fdd12c7a63

Download Submit
memory/732-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/732-21-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/732-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3264-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3264-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3264-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3264-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3264-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download