asyncrat | b080e3099be6e6f2c29a4af27bfbbab4535ebcb750dc6f7ba36649f6502022d3

General

Target
tmpjpzoohju.exe
Size 45KB
Sample260602-klbycsav2n
SHA256 b080e3099be6e6f2c29a4af27bfbbab4535ebcb750dc6f7ba36649f6502022d3
MD5 99d5174ad0730af75ae78fe6520abdbf
SHA1 a999b6f1aa98c52cae84d9a9fa8cfce3cd4c7e7e
SHA512 a4235d9be90a46ea4a703bfb5a25967d0e0685b340d6ce1c1cb668aa934998269bea93bd91f99035cc531b9d8c488d4fce6b7f277df90e7b68ffd716992106b5
SSDEEP 768:5udNpTNctooWUS7C+mo2qtBCwyTtUPItzjbvgX3iPLecZVjD0BDZ0x:5udNpTNmU22E7t3bYXSKcZped0x
TLSH
T15F232D0037E8812BF2BE4F7899F26145857AF6673603D54A2CC441DB5623FC69A427FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

theh-brands.com:443
theh-brands.com:80
theh-brands.com:7797
theh-brands.com:8707
theh-brands.com:6620
www.theh-brands.com:443
www.theh-brands.com:80
www.theh-brands.com:7797
www.theh-brands.com:8707
www.theh-brands.com:6620
melissa.theh-brands.com:443
melissa.theh-brands.com:80
melissa.theh-brands.com:7797
melissa.theh-brands.com:8707
melissa.theh-brands.com:6620
dridex.theh-brands.com:443
dridex.theh-brands.com:80
dridex.theh-brands.com:7797
dridex.theh-brands.com:8707
dridex.theh-brands.com:6620
mirai.theh-brands.com:443
mirai.theh-brands.com:80
mirai.theh-brands.com:7797
mirai.theh-brands.com:8707
mirai.theh-brands.com:6620
remote.theh-brands.com:443
remote.theh-brands.com:80
remote.theh-brands.com:7797
remote.theh-brands.com:8707
remote.theh-brands.com:6620

Mutex

KGDaBK0how8j

Attributes

delay
0
install
true
install_file
tns862.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/files/0x000700000001e6cf-8.dat	family_asyncrat
behavioral2/memory/844-10-0x0000000004FC0000-0x0000000004FD0000-memory.dmp	family_asyncrat

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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	tmpjpzoohju.exe

Executes dropped EXE 2 IoCs

pid	Process
844	tns862.exe
628	tns862.exe

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 7 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	tmpjpzoohju.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tns862.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tns862.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1832	timeout.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
840	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe
2576	tmpjpzoohju.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2576	tmpjpzoohju.exe
Token: SeDebugPrivilege	844	tns862.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2576 wrote to memory of 1996	2576	tmpjpzoohju.exe	89
PID 2576 wrote to memory of 4872	2576	tmpjpzoohju.exe	91
PID 4872 wrote to memory of 1832	4872	cmd.exe	93
PID 1996 wrote to memory of 840	1996	cmd.exe	94
PID 4872 wrote to memory of 628	4872	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\tmpjpzoohju.exe
"C:\Users\Admin\AppData\Local\Temp\tmpjpzoohju.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tns862" /tr '"C:\Users\Admin\AppData\Roaming\tns862.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1996
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "tns862" /tr '"C:\Users\Admin\AppData\Roaming\tns862.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:840
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp58C9.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1832
- - C:\Users\Admin\AppData\Roaming\tns862.exe
    "C:\Users\Admin\AppData\Roaming\tns862.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:628

C:\Users\Admin\AppData\Roaming\tns862.exe
"C:\Users\Admin\AppData\Roaming\tns862.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:844

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp58C9.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp58C9.tmp.bat
Size 150B
SHA256 db767f71a2f3c2dac736f431a5821a6faea860d1318d991dde43a86ad9a71161
MD5 bea7dd2b33c8276afa30a799ac913a59
SHA1 89b2f1169f4aab122a50a3f67a28b9c8e56989ec
SHA512 0557a8ca7e6d303297fe5f589018bfd704ab8555eb9795c458485513776e1c5497327e04860f27a745e7d77ce6bd160822d5b632e09c5910a2df11c104eef659
TLSH
T18DC08C4252C6AA0E2809141302FAA98CA1B2A89A3F84BF048704480E228044AE0AD241
MD5 SHA1 SHA512 TLSH

Submit Download

tns862.exe

Path C:\Users\Admin\AppData\Roaming\tns862.exe
Size 45KB
SHA256 b080e3099be6e6f2c29a4af27bfbbab4535ebcb750dc6f7ba36649f6502022d3
MD5 99d5174ad0730af75ae78fe6520abdbf
SHA1 a999b6f1aa98c52cae84d9a9fa8cfce3cd4c7e7e
SHA512 a4235d9be90a46ea4a703bfb5a25967d0e0685b340d6ce1c1cb668aa934998269bea93bd91f99035cc531b9d8c488d4fce6b7f277df90e7b68ffd716992106b5
SSDEEP 768:5udNpTNctooWUS7C+mo2qtBCwyTtUPItzjbvgX3iPLecZVjD0BDZ0x:5udNpTNmU22E7t3bYXSKcZped0x
TLSH
T15F232D0037E8812BF2BE4F7899F26145857AF6673603D54A2CC441DB5623FC69A427FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/844-10-0x0000000004FC0000-0x0000000004FD0000-memory.dmp

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memory/844-13-0x0000000004FC0000-0x0000000004FD0000-memory.dmp

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memory/2576-0-0x00000000000B0000-0x00000000000C2000-memory.dmp

Download

memory/2576-1-0x0000000004B80000-0x0000000004B90000-memory.dmp

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memory/2576-2-0x0000000004AA0000-0x0000000004B3C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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