asyncrat | da88e9a029e6335e992a131cd0e4cc60c28a3cdad23d628d54db770ee694ace5

Analysis

max time kernel
4s
max time network
31s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/03/2025, 02:02

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General

Target

Downloads.exe
Size

11.1MB
MD5

03443b92e798c949af90c1afc59be60b
SHA1

a860455aa51306f6563ec1091db8bbebb1afc672
SHA256

da88e9a029e6335e992a131cd0e4cc60c28a3cdad23d628d54db770ee694ace5
SHA512

eaf0ff832c28c06d413e6200538f4f3d264c919850eee72a9f9cccd3480a07aeff0ae8bc2d00af8ab66924707e7aca8cf0c237ca2e157478271ef5d68d9764b3
SSDEEP

196608:zzXuVy7rxVoq0Rw3b/kiZOjI5oiYwrFdF8jr1N6NforhRiVtl7X/LDouPs1sjPPZ:eopVofYjxFYwrFdFK1N8fo2VL7vLDQqZ

Score

10^/10

asyncrat quasar umbral xmrig default office04 discovery miner rat spyware stealer trojan upx

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

197.48.105.157:5505

41.233.14.164:5505

197.48.230.161:5505

102.41.58.213:5505

Mutex

RW4mawavalFO

Attributes

delay
3
install
true
install_file
svchost.exe
install_folder
%AppData%

aes.plain

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

102.41.58.213:5505

Mutex

1e97a2db-0622-4c39-84ac-2f640c70aaf5

Attributes

encryption_key
1F6CCF154B4C85A58D675CA9A482E9C7A041C879
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svchost
subdirectory
SubDir

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000015ec9-22.dat	family_umbral
behavioral1/memory/2748-80-0x0000000001280000-0x00000000012C0000-memory.dmp	family_umbral

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000015e48-14.dat	family_quasar
behavioral1/memory/2848-81-0x0000000001250000-0x0000000001574000-memory.dmp	family_quasar

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral

XMRig Miner payload 2 IoCs

miner

resource	yara_rule
behavioral1/files/0x000a0000000120f9-50.dat	family_xmrig
behavioral1/files/0x000a0000000120f9-50.dat	xmrig

Xmrig family
xmrig
xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
miner xmrig

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0007000000015f71-38.dat	family_asyncrat

Executes dropped EXE 6 IoCs

pid	Process
2848	v2.exe
2748	Umbral.exe
2880	svchost.exe
3020	DellTPM.exe
2640	xmrig.exe
2724	DellTPM.exe

Loads dropped DLL 5 IoCs

pid	Process
2540	Downloads.exe
2540	Downloads.exe
2800	Process not Found
3020	DellTPM.exe
2724	DellTPM.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\svchost.exe	v2.exe
File opened for modification	C:\Windows\system32\SubDir\svchost.exe	v2.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0006000000017491-76.dat	upx
behavioral1/memory/2724-79-0x000007FEF4CA0000-0x000007FEF5304000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
876	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeLockMemoryPrivilege	2640	xmrig.exe
Token: SeLockMemoryPrivilege	2640	xmrig.exe
Token: SeIncBasePriorityPrivilege	2640	xmrig.exe
Token: SeDebugPrivilege	2848	v2.exe
Token: SeDebugPrivilege	2748	Umbral.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2640	xmrig.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 2848	2540	Downloads.exe	30
PID 2540 wrote to memory of 2848	2540	Downloads.exe	30
PID 2540 wrote to memory of 2848	2540	Downloads.exe	30
PID 2540 wrote to memory of 2748	2540	Downloads.exe	31
PID 2540 wrote to memory of 2748	2540	Downloads.exe	31
PID 2540 wrote to memory of 2748	2540	Downloads.exe	31
PID 2540 wrote to memory of 2880	2540	Downloads.exe	32
PID 2540 wrote to memory of 2880	2540	Downloads.exe	32
PID 2540 wrote to memory of 2880	2540	Downloads.exe	32
PID 2540 wrote to memory of 2880	2540	Downloads.exe	32
PID 2540 wrote to memory of 3020	2540	Downloads.exe	33
PID 2540 wrote to memory of 3020	2540	Downloads.exe	33
PID 2540 wrote to memory of 3020	2540	Downloads.exe	33
PID 2540 wrote to memory of 2640	2540	Downloads.exe	34
PID 2540 wrote to memory of 2640	2540	Downloads.exe	34
PID 2540 wrote to memory of 2640	2540	Downloads.exe	34
PID 3020 wrote to memory of 2724	3020	DellTPM.exe	36
PID 3020 wrote to memory of 2724	3020	DellTPM.exe	36
PID 3020 wrote to memory of 2724	3020	DellTPM.exe	36
PID 2848 wrote to memory of 876	2848	v2.exe	37
PID 2848 wrote to memory of 876	2848	v2.exe	37
PID 2848 wrote to memory of 876	2848	v2.exe	37

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Downloads.exe
"C:\Users\Admin\AppData\Local\Temp\Downloads.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Local\Temp\v2.exe
  "C:\Users\Admin\AppData\Local\Temp\v2.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2848
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:876
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2748
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2880
- C:\Users\Admin\AppData\Local\Temp\DellTPM.exe
  "C:\Users\Admin\AppData\Local\Temp\DellTPM.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Users\Admin\AppData\Local\Temp\DellTPM.exe
    "C:\Users\Admin\AppData\Local\Temp\DellTPM.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:2724
- C:\Users\Admin\AppData\Local\Temp\xmrig.exe
  "C:\Users\Admin\AppData\Local\Temp\xmrig.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  PID:2640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.0MB

MD5
d735b955e73cd77ea538c8a07b92fb77

SHA1
b0a258aa1898bc3a7ae150ca5a7c75f1110ecdf5

SHA256
faffb319345d200a558403952e5471bb9087769778a5a79cbeef7668c8097289

SHA512
3b36c2a7d877dfc156ba800bd2bdd6a1d51f8aed08511082c097051e1c1e10275f278f4020c7d7d668f3a62c42a6cfddc36070dde1c9ba22ba015f87c3e410bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\Umbral.exe

Filesize
231KB

MD5
cb74e74c04357a7f8c0df2277c4248f0

SHA1
1bc3fedce9f5e6a71b7e493699cb3774b8042c18

SHA256
d1734e1266ee9ae362168458054123674211b0bd40ca93732114735886a12895

SHA512
c62322e61bcec1f2efe4736f73df73fd256c8a2361599b7c270521966cdba38a800a8f30b67748a06753c46904f470c087f748c85f1251ace0cab888e5b4af31

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI30202\python313.dll

Filesize
1.8MB

MD5
2a4aad7818d527bbea76e9e81077cc21

SHA1
4db3b39874c01bf3ba1ab8659957bbc28aab1ab2

SHA256
4712a6bb81b862fc292fcd857cef931ca8e4c142e70eaa4fd7a8d0a96aff5e7e

SHA512
d10631b7fc25a8b9cc038514e9db1597cec0580ee34a56ce5cfc5a33e7010b5e1df7f15ec30ebb351356e2b815528fb4161956f26b5bfaf3dce7bc6701b79c68

Download Submit
C:\Users\Admin\AppData\Local\Temp\config.json

Filesize
2KB

MD5
1cdbd472c68d1f35a20e0fadeff45af3

SHA1
3a40e0bd82550ee2eb3faec4232aa118f36b0276

SHA256
6e4c57c72f39daff5ec37ded92939d18da3179ccb3acaa4a54358dc86758d422

SHA512
75d97da51e23bb896a1ab024c85116b29ae8d2a10a2335768ea33a1f9b1cfbcf31c5c3f81b8275226e2aa4e44db55fec3c6d91a3055f380f63e4ae6325782ac1

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
45KB

MD5
c4484c446e4151680918c3564a6e7eca

SHA1
ad142d75ffd178efbf556726392d69f735506466

SHA256
f4d8d8829ff73a9c12e508a6f37d8a2e97f8cd9673d2d471d2c9c7af843db3a0

SHA512
1726d8493d8897c8165c2e1aeee1df699e1cc3b42836345af0f9b4e486daaea679421f26908518d57bb5ca3c7ff7460c914233847719909119519fa9175de247

Download Submit
C:\Users\Admin\AppData\Local\Temp\v2.exe

Filesize
3.1MB

MD5
44bf522a553e8fde9a377f75fde20442

SHA1
0f9cb72fe60c334f6aa0c6ae642f5d9867a4ff8e

SHA256
1467681b3b224b5447b70e54088ded2dd27ca04ea5f27f14dfe6ce8369ad73b7

SHA512
f72c59872ed8954d7ec4ab3e109c19bb7b2a750b1e7041a0aff9b38f0726d5bbaedc364f549a401c9f827d988521204f5c765ef286ff8d9d609ca4e1e5886879

Download Submit
C:\Users\Admin\AppData\Local\Temp\xmrig.exe

Filesize
6.1MB

MD5
f6d520ae125f03056c4646c508218d16

SHA1
f65e63d14dd57eadb262deaa2b1a8a965a2a962c

SHA256
d2fcf28897ddc2137141d838b734664ff7592e03fcd467a433a51cb4976b4fb1

SHA512
d1ec3da141ce504993a0cbf8ea4b719ffa40a2be4941c18ffc64ec3f71435f7bddadda6032ec0ae6cada66226ee39a2012079ed318df389c7c6584ad3e1c334d

Download Submit
memory/2640-74-0x00000000000F0000-0x0000000000110000-memory.dmp

Filesize
128KB

Download
memory/2724-79-0x000007FEF4CA0000-0x000007FEF5304000-memory.dmp

Filesize
6.4MB

Download
memory/2748-80-0x0000000001280000-0x00000000012C0000-memory.dmp

Filesize
256KB

Download
memory/2848-81-0x0000000001250000-0x0000000001574000-memory.dmp

Filesize
3.1MB

Download
memory/2880-82-0x0000000001050000-0x0000000001062000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads