023123cc7367ab37e8a9993a75b29d2e370a1e8b600e220eb043cc2cb16412aa

Analysis

max time kernel
41s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 14:48

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General

Target

bifrost.exe
Size

1.8MB
MD5

57b40349e764218a84dcc24771912013
SHA1

632c4fb859357d53ff200258a7f287cb4ac729a1
SHA256

13a336fd1c6148134a22d9d6a0b65e6d1b8d0512fc0d4a8cb68ca1967a96aba5
SHA512

90a049509b4ea5d6b0c4c60cff6c7a174a1370a630490a047af0285900efb57c6b89fc56fbad45ee61b64c4f7fdcfc785e3a8d5d72d7fc3e36a7e275390da6f8
SSDEEP

24576:JmrRJmzQVspzfungCHOfGnK7pMrJ26L7PtcpzR6GD+ZCXM4YwtQRIkV6+:JmrRUzZragOyB7p2J26HepsnL

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

10.exe10.exe

pid process

4244 10.exe
5076 10.exe
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

Processes:

bifrost.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation bifrost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

10.exe

description pid process target process

PID 4244 set thread context of 5076 4244 10.exe 10.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

10.exe

pid process

5076 10.exe
5076 10.exe
5076 10.exe
5076 10.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

10.exe

description pid process

Token: SeDebugPrivilege 4244 10.exe

pid	process
4244	10.exe
5076	10.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	bifrost.exe

description	pid	process	target process
PID 4244 set thread context of 5076	4244	10.exe	10.exe

pid	process
5076	10.exe
5076	10.exe
5076	10.exe
5076	10.exe

description	pid	process
Token: SeDebugPrivilege	4244	10.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

bifrost.exe10.exe10.exe

description	pid	process	target process
PID 1828 wrote to memory of 4244	1828	bifrost.exe	10.exe
PID 1828 wrote to memory of 4244	1828	bifrost.exe	10.exe
PID 1828 wrote to memory of 4244	1828	bifrost.exe	10.exe
PID 4244 wrote to memory of 3796	4244	10.exe	10.exe
PID 4244 wrote to memory of 3796	4244	10.exe	10.exe
PID 4244 wrote to memory of 3796	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 4244 wrote to memory of 5076	4244	10.exe	10.exe
PID 5076 wrote to memory of 3040	5076	10.exe	Explorer.EXE
PID 5076 wrote to memory of 3040	5076	10.exe	Explorer.EXE
PID 5076 wrote to memory of 3040	5076	10.exe	Explorer.EXE
PID 5076 wrote to memory of 3040	5076	10.exe	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3040

C:\Users\Admin\AppData\Local\Temp\bifrost.exe
"C:\Users\Admin\AppData\Local\Temp\bifrost.exe"
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1828

C:\Users\Admin\AppData\Local\Temp\10.exe
"C:\Users\Admin\AppData\Local\Temp\10.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4244

C:\Users\Admin\AppData\Local\Temp\10.exe
C:\Users\Admin\AppData\Local\Temp\10.exe
4⤵
PID:3796

C:\Users\Admin\AppData\Local\Temp\10.exe
C:\Users\Admin\AppData\Local\Temp\10.exe
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5076

Network

MITRE ATT&CK Enterprise v6

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\10.exe
Filesize
421KB

MD5
1681ddaa65e6039f4e01b9c5d2b66de1

SHA1
69e66bba05d57499109aa62a50fb3e4a37325939

SHA256
d476dc93cb32252f42fa156eff2655643a2deabfcfb8c442c2567a9443ab05c0

SHA512
4885eb4d268c2513a67eb280660fa80b8506b106850183921a82ba14a46409a770ea2cb7a674a9d0d79668564fdb45c102a8584b09d7011bff0951bae6aac6ac

Download Submit
C:\Users\Admin\AppData\Local\Temp\10.exe
Filesize
421KB

MD5
1681ddaa65e6039f4e01b9c5d2b66de1

SHA1
69e66bba05d57499109aa62a50fb3e4a37325939

SHA256
d476dc93cb32252f42fa156eff2655643a2deabfcfb8c442c2567a9443ab05c0

SHA512
4885eb4d268c2513a67eb280660fa80b8506b106850183921a82ba14a46409a770ea2cb7a674a9d0d79668564fdb45c102a8584b09d7011bff0951bae6aac6ac

Download Submit
C:\Users\Admin\AppData\Local\Temp\10.exe
Filesize
421KB

MD5
1681ddaa65e6039f4e01b9c5d2b66de1

SHA1
69e66bba05d57499109aa62a50fb3e4a37325939

SHA256
d476dc93cb32252f42fa156eff2655643a2deabfcfb8c442c2567a9443ab05c0

SHA512
4885eb4d268c2513a67eb280660fa80b8506b106850183921a82ba14a46409a770ea2cb7a674a9d0d79668564fdb45c102a8584b09d7011bff0951bae6aac6ac

Download Submit
memory/3040-145-0x000000007FFF0000-0x000000007FFF7000-memory.dmp

Filesize
28KB

Download
memory/4244-132-0x0000000000000000-mapping.dmp

Download
memory/4244-135-0x0000000000690000-0x00000000006E0000-memory.dmp

Filesize
320KB

Download
memory/4244-138-0x00000000735D0000-0x0000000073B81000-memory.dmp

Filesize
5.7MB

Download
memory/4244-143-0x00000000735D0000-0x0000000073B81000-memory.dmp

Filesize
5.7MB

Download
memory/5076-139-0x0000000000000000-mapping.dmp

Download
memory/5076-140-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/5076-144-0x0000000000400000-0x0000000000408960-memory.dmp

Filesize
34KB

Download
memory/5076-146-0x0000000010000000-0x0000000010013000-memory.dmp

Filesize
76KB

Download