c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100

General

Target

c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe
Size

346KB
MD5

8e5b11b4459592014296f9ab307004a6
SHA1

b0cd326c8389db2adeadd541cb21e1fbfb346c80
SHA256

c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100
SHA512

a9cac4fbd5eb23fa15564bcfac2734171b4650d7bf8e9218e917e2f0168667a88f0538c21f75ce6057355ea825bdddafee62afc063503e18bf6f824dd50d5b16
SSDEEP

6144:jPL9R55VPkcn0QtPoNHMTMnUDHohJMJ/rTK/Va13YTJt2:rpRZPA06MTMUqddC2a

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 4 IoCs

Processes:

yysl.exeyysl.exeFB_D68A.tmp.exeFB_F473.tmp.exe

pid process

204 yysl.exe
4980 yysl.exe
4516 FB_D68A.tmp.exe
3340 FB_F473.tmp.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:

yysl.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation yysl.exe

pid	process
204	yysl.exe
4980	yysl.exe
4516	FB_D68A.tmp.exe
3340	FB_F473.tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	yysl.exe

Drops startup file 1 IoCs

Processes:

c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bbb5s.vbs	c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

yysl.exe

description pid process target process

PID 204 set thread context of 4980 204 yysl.exe yysl.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: MapViewOfSection 2 IoCs

Processes:

yysl.exe

pid process

204 yysl.exe
204 yysl.exe

description	pid	process	target process
PID 204 set thread context of 4980	204	yysl.exe	yysl.exe

pid	process
204	yysl.exe
204	yysl.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exeyysl.exeyysl.exe

description	pid	process	target process
PID 504 wrote to memory of 204	504	c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe	yysl.exe
PID 504 wrote to memory of 204	504	c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe	yysl.exe
PID 504 wrote to memory of 204	504	c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe	yysl.exe
PID 204 wrote to memory of 4980	204	yysl.exe	yysl.exe
PID 204 wrote to memory of 4980	204	yysl.exe	yysl.exe
PID 204 wrote to memory of 4980	204	yysl.exe	yysl.exe
PID 4980 wrote to memory of 4516	4980	yysl.exe	FB_D68A.tmp.exe
PID 4980 wrote to memory of 4516	4980	yysl.exe	FB_D68A.tmp.exe
PID 4980 wrote to memory of 4516	4980	yysl.exe	FB_D68A.tmp.exe
PID 4980 wrote to memory of 3340	4980	yysl.exe	FB_F473.tmp.exe
PID 4980 wrote to memory of 3340	4980	yysl.exe	FB_F473.tmp.exe
PID 4980 wrote to memory of 3340	4980	yysl.exe	FB_F473.tmp.exe

C:\Users\Admin\AppData\Local\Temp\c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe
"C:\Users\Admin\AppData\Local\Temp\c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100.exe"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:504

C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe
"C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:204

C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe
"C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe"
3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4980

C:\Users\Admin\AppData\Local\Temp\FB_D68A.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\FB_D68A.tmp.exe"
4⤵
- Executes dropped EXE
PID:4516

C:\Users\Admin\AppData\Local\Temp\FB_F473.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\FB_F473.tmp.exe"
4⤵
- Executes dropped EXE
PID:3340

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\FB_D68A.tmp.exe
Filesize
3KB

MD5
74bafb3e707c7b0c63938ac200f99c7f

SHA1
10c5506337845ed9bf25c73d2506f9c15ab8e608

SHA256
129450ba06ad589cf6846a455a5b6b5f55e164ee4906e409eb692ab465269689

SHA512
5b24dc5acd14f812658e832b587b60695fb16954fca006c2c3a7382ef0ec65c3bd1aaf699425c49ff3cceef16869e75dd6f00ec189b9f673f08f7e1b80cf7781

Download Submit
C:\Users\Admin\AppData\Local\Temp\FB_D68A.tmp.exe
Filesize
3KB

MD5
74bafb3e707c7b0c63938ac200f99c7f

SHA1
10c5506337845ed9bf25c73d2506f9c15ab8e608

SHA256
129450ba06ad589cf6846a455a5b6b5f55e164ee4906e409eb692ab465269689

SHA512
5b24dc5acd14f812658e832b587b60695fb16954fca006c2c3a7382ef0ec65c3bd1aaf699425c49ff3cceef16869e75dd6f00ec189b9f673f08f7e1b80cf7781

Download Submit
C:\Users\Admin\AppData\Local\Temp\FB_F473.tmp.exe
Filesize
138KB

MD5
c20a02e741f60444d5958b82ea1f9733

SHA1
bbb9aa78eeb9ef412c1bd78ce44d328118b5706e

SHA256
c89c7939f95bcf69c4d0be1eab980e232f7bce1d3ab4178c311bb25506e35084

SHA512
48ea63d2e4b8f80a30ae4a52c6e3591bb37f5a6b2b0be8f1762d501d1c5a5ec7bc4bf9ac2944e758a6b97d69c8eadb5950c4de2070a644430fa628ccd4d96dbc

Download Submit
C:\Users\Admin\AppData\Local\Temp\FB_F473.tmp.exe
Filesize
138KB

MD5
c20a02e741f60444d5958b82ea1f9733

SHA1
bbb9aa78eeb9ef412c1bd78ce44d328118b5706e

SHA256
c89c7939f95bcf69c4d0be1eab980e232f7bce1d3ab4178c311bb25506e35084

SHA512
48ea63d2e4b8f80a30ae4a52c6e3591bb37f5a6b2b0be8f1762d501d1c5a5ec7bc4bf9ac2944e758a6b97d69c8eadb5950c4de2070a644430fa628ccd4d96dbc

Download Submit
C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe
Filesize
346KB

MD5
8e5b11b4459592014296f9ab307004a6

SHA1
b0cd326c8389db2adeadd541cb21e1fbfb346c80

SHA256
c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100

SHA512
a9cac4fbd5eb23fa15564bcfac2734171b4650d7bf8e9218e917e2f0168667a88f0538c21f75ce6057355ea825bdddafee62afc063503e18bf6f824dd50d5b16

Download Submit
C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe
Filesize
346KB

MD5
8e5b11b4459592014296f9ab307004a6

SHA1
b0cd326c8389db2adeadd541cb21e1fbfb346c80

SHA256
c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100

SHA512
a9cac4fbd5eb23fa15564bcfac2734171b4650d7bf8e9218e917e2f0168667a88f0538c21f75ce6057355ea825bdddafee62afc063503e18bf6f824dd50d5b16

Download Submit
C:\Users\Admin\AppData\Roaming\wrdr\yysl.exe
Filesize
346KB

MD5
8e5b11b4459592014296f9ab307004a6

SHA1
b0cd326c8389db2adeadd541cb21e1fbfb346c80

SHA256
c1cca7728dabf7ce7ecdfaecc8c54412207aff39490cd557b1db568c97437100

SHA512
a9cac4fbd5eb23fa15564bcfac2734171b4650d7bf8e9218e917e2f0168667a88f0538c21f75ce6057355ea825bdddafee62afc063503e18bf6f824dd50d5b16

Download Submit
memory/204-132-0x0000000000000000-mapping.dmp

Download
memory/3340-141-0x0000000000000000-mapping.dmp

Download
memory/4516-138-0x0000000000000000-mapping.dmp

Download
memory/4980-135-0x0000000000000000-mapping.dmp

Download
memory/4980-137-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download

Analysis

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