asyncrat | 501317a60d63bac59b9cc6994cd4d03207a929ab689939d062635656b4ed8231

Analysis

max time kernel
149s
max time network
156s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26-08-2022 06:32

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General

Target

BcJRFxiQTFDdmBX.exe
Size

48KB
MD5

a671a69d4e3f7425bf163eae052250ff
SHA1

80c47eae696348b607f5f54ab3101c10c64192ce
SHA256

447f95e2299fbab8e30669f1fd5c71b2e69499e25adae3373093c0317f53fdc5
SHA512

527a88921d628ffbe1cfbe21f204e3dbf3cea026129c6a9e3d713a82b9c9e6f75155f5da4bfe2f14845d6542cdbe129fa72214b028c4fdc397456d33f789a85b
SSDEEP

768:mbRJZBILLWQ9+jiwtelDSN+iV08Ybygecb+zqBEmyIvEgK/JbZVc6KN:mbRq9wtKDs4zb1pu9xInkJbZVclN

Score

10^/10

asyncrat rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 4 IoCs

rat

resource	yara_rule
behavioral9/memory/1092-54-0x0000000001090000-0x00000000010A2000-memory.dmp	asyncrat
behavioral9/files/0x00140000000054ab-61.dat	asyncrat
behavioral9/files/0x00140000000054ab-62.dat	asyncrat
behavioral9/memory/2044-63-0x0000000000280000-0x0000000000292000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2044	Windows Service .exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1916	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1208	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	Windows Service .exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 040000000100000010000000acb694a59c17e0d791529bb19706a6e40f0000000100000014000000ce0e658aa3e847e467a147b3049191093d055e6f0b0000000100000034000000420061006c00740069006d006f007200650020004300790062006500720054007200750073007400200052006f006f007400000053000000010000002400000030223020060a2b06010401b13e01640130123010060a2b0601040182373c0101030200c0140000000100000014000000e59d5930824758ccacfa085436867b3ab5044df01d0000000100000010000000918ad43a9475f78bb5243de886d8103c09000000010000000c000000300a06082b06010505070301030000000100000014000000d4de20d05e66fc53fe1a50882c78db2852cae47419000000010000001000000068cb42b035ea773e52ef50ecf50ec52920000000010000007b030000308203773082025fa0030201020204020000b9300d06092a864886f70d0101050500305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f74301e170d3030303531323138343630305a170d3235303531323233353930305a305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f7430820122300d06092a864886f70d01010105000382010f003082010a0282010100a304bb22ab983d57e826729ab579d429e2e1e89580b1b0e35b8e2b299a64dfa15dedb009056ddb282ece62a262feb488da12eb38eb219dc0412b01527b8877d31c8fc7bab988b56a09e773e81140a7d1ccca628d2de58f0ba650d2a850c328eaf5ab25878a9a961ca967b83f0cd5f7f952132fc21bd57070f08fc012ca06cb9ae1d9ca337a77d6f8ecb9f16844424813d2c0c2a4ae5e60feb6a605fcb4dd075902d459189863f5a563e0900c7d5db2067af385eaebd403ae5e843e5fff15ed69bcf939367275cf77524df3c9902cb93de5c923533f1f2498215c079929bdc63aece76e863a6b97746333bd681831f0788d76bffc9e8e5d2a86a74d90dc271a390203010001a3453043301d0603551d0e04160414e59d5930824758ccacfa085436867b3ab5044df030120603551d130101ff040830060101ff020103300e0603551d0f0101ff040403020106300d06092a864886f70d01010505000382010100850c5d8ee46f51684205a0ddbb4f27258403bdf764fd2dd730e3a41017ebda2929b6793f76f6191323b8100af958a4d46170bd04616a128a17d50abdc5bc307cd6e90c258d86404feccca37e38c637114feddd68318e4cd2b30174eebe755e07481a7f70ff165c84c07985b805fd7fbe6511a30fc002b4f852373904d5a9317a18bfa02af41299f7a34582e33c5ef59d9eb5c89e7c2ec8a49e4e08144b6dfd706d6b1a63bd64e61fb7cef0f29f2ebb1bb7f250887392c2e2e3168d9a3202ab8e18dde91011ee7e35ab90af3e30947ad0333da7650ff5fc8e9e62cf47442c015dbb1db532d247d2382ed0fe81dc326a1eb5ee3cd5fce7811d19c32442ea6339a9	Windows Service .exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1092	BcJRFxiQTFDdmBX.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1092	BcJRFxiQTFDdmBX.exe
Token: SeDebugPrivilege	2044	Windows Service .exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 1388	1092	BcJRFxiQTFDdmBX.exe	32
PID 1092 wrote to memory of 1388	1092	BcJRFxiQTFDdmBX.exe	32
PID 1092 wrote to memory of 1388	1092	BcJRFxiQTFDdmBX.exe	32
PID 1092 wrote to memory of 808	1092	BcJRFxiQTFDdmBX.exe	29
PID 1092 wrote to memory of 808	1092	BcJRFxiQTFDdmBX.exe	29
PID 1092 wrote to memory of 808	1092	BcJRFxiQTFDdmBX.exe	29
PID 1388 wrote to memory of 1916	1388	cmd.exe	31
PID 1388 wrote to memory of 1916	1388	cmd.exe	31
PID 1388 wrote to memory of 1916	1388	cmd.exe	31
PID 808 wrote to memory of 1208	808	cmd.exe	30
PID 808 wrote to memory of 1208	808	cmd.exe	30
PID 808 wrote to memory of 1208	808	cmd.exe	30
PID 808 wrote to memory of 2044	808	cmd.exe	33
PID 808 wrote to memory of 2044	808	cmd.exe	33
PID 808 wrote to memory of 2044	808	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\BcJRFxiQTFDdmBX.exe
"C:\Users\Admin\AppData\Local\Temp\BcJRFxiQTFDdmBX.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2C9D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:808
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1208
- - C:\Users\Admin\AppData\Roaming\Windows Service .exe
    "C:\Users\Admin\AppData\Roaming\Windows Service .exe"
    3⤵
    - Executes dropped EXE
    - Modifies system certificate store
    - Suspicious use of AdjustPrivilegeToken
    PID:2044
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Service " /tr '"C:\Users\Admin\AppData\Roaming\Windows Service .exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1388

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windows Service " /tr '"C:\Users\Admin\AppData\Roaming\Windows Service .exe"'
1⤵
- Creates scheduled task(s)
PID:1916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2C9D.tmp.bat

Filesize
160B

MD5
71182af9b1cdf604868b6365c3ad1275

SHA1
bdd8a9fd37b730cd0db86f56f1c7cd839c032b88

SHA256
66c1711ae4579aec21dc311f65bd761c15d9d34f8ff4a087a506d216ba11f102

SHA512
d2f6702d06fa4aefcee9e15c21df7727749b4346c0f160abfb4edf34f4a49be30ca72dd4039d81b16cc228f5d57d1ca82ee5d9cc3c45f0bd26856eebaa2cb84e

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Service .exe

Filesize
48KB

MD5
a671a69d4e3f7425bf163eae052250ff

SHA1
80c47eae696348b607f5f54ab3101c10c64192ce

SHA256
447f95e2299fbab8e30669f1fd5c71b2e69499e25adae3373093c0317f53fdc5

SHA512
527a88921d628ffbe1cfbe21f204e3dbf3cea026129c6a9e3d713a82b9c9e6f75155f5da4bfe2f14845d6542cdbe129fa72214b028c4fdc397456d33f789a85b

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Service .exe

Filesize
48KB

MD5
a671a69d4e3f7425bf163eae052250ff

SHA1
80c47eae696348b607f5f54ab3101c10c64192ce

SHA256
447f95e2299fbab8e30669f1fd5c71b2e69499e25adae3373093c0317f53fdc5

SHA512
527a88921d628ffbe1cfbe21f204e3dbf3cea026129c6a9e3d713a82b9c9e6f75155f5da4bfe2f14845d6542cdbe129fa72214b028c4fdc397456d33f789a85b

Download Submit
memory/1092-54-0x0000000001090000-0x00000000010A2000-memory.dmp

Filesize
72KB

Download
memory/2044-63-0x0000000000280000-0x0000000000292000-memory.dmp

Filesize
72KB

Download