4fbb3a4d7e916d2a0fa703d00ceb900eb4b97cf3a5c8af800db0aa82537a9411

General

Target

bff043ef9ac0fb9c21eee2eb9f92fbdc.exe
Size

1.4MB
MD5

bff043ef9ac0fb9c21eee2eb9f92fbdc
SHA1

18a4d754ac37da6cd5078b1e42d5573d6abf343c
SHA256

4fbb3a4d7e916d2a0fa703d00ceb900eb4b97cf3a5c8af800db0aa82537a9411
SHA512

4710598f504810dce09534d88a3d36614ebef5354175a03790d2e7a1814d4e34995381d1fe6e368aef46c4859cac499e30dc88cea5c24bea885d80d4852d65ac
SSDEEP

24576:s6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ES:zY9UORVOM1jJHzaiape0hsABFRJch6Lm

Score

9^/10

rezer0 upx

Malware Config

Signatures

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral2/memory/2596-12-0x0000000005C50000-0x0000000005C7C000-memory.dmp	rezer0

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:

test.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

2596 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
2596	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2912-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/2912-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/2912-21-0x0000000000400000-0x00000000006F1000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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/Job
T1053

Processes:

schtasks.exe

pid process

1768 schtasks.exe
Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

test.exe

pid process

2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
2596 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 2596 test.exe

pid	process
1768	schtasks.exe

pid	process
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe
2596	test.exe

description	pid	process
Token: SeDebugPrivilege	2596	test.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

bff043ef9ac0fb9c21eee2eb9f92fbdc.execmd.exetest.exe

description	pid	process	target process
PID 2912 wrote to memory of 4144	2912	bff043ef9ac0fb9c21eee2eb9f92fbdc.exe	cmd.exe
PID 2912 wrote to memory of 4144	2912	bff043ef9ac0fb9c21eee2eb9f92fbdc.exe	cmd.exe
PID 2912 wrote to memory of 4144	2912	bff043ef9ac0fb9c21eee2eb9f92fbdc.exe	cmd.exe
PID 4144 wrote to memory of 2596	4144	cmd.exe	test.exe
PID 4144 wrote to memory of 2596	4144	cmd.exe	test.exe
PID 4144 wrote to memory of 2596	4144	cmd.exe	test.exe
PID 2596 wrote to memory of 1768	2596	test.exe	schtasks.exe
PID 2596 wrote to memory of 1768	2596	test.exe	schtasks.exe
PID 2596 wrote to memory of 1768	2596	test.exe	schtasks.exe
PID 2596 wrote to memory of 2940	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 2940	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 2940	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3608	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3608	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3608	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3752	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3752	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3752	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 2076	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 2076	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 2076	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3276	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3276	2596	test.exe	vbc.exe
PID 2596 wrote to memory of 3276	2596	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\bff043ef9ac0fb9c21eee2eb9f92fbdc.exe
"C:\Users\Admin\AppData\Local\Temp\bff043ef9ac0fb9c21eee2eb9f92fbdc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2912

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:4144

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2596

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB2B6.tmp"
4⤵
- Creates scheduled task(s)
PID:1768

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2940

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3608

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3752

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2076

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3276

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2552 --field-trial-handle=3084,i,11997299123381683778,5904351605020331957,262144 --variations-seed-version /prefetch:8
1⤵
PID:4060

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scripting

1

T1064

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe
Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB2B6.tmp
Filesize
1KB

MD5
36d5ca3a971c7ee367fe52dea4b4a0c0

SHA1
5f1aaaf7533b48dd065933cc382e852164bdb760

SHA256
e8c583985ee8ab73185d57c073a5e42321d264aee15c0c5f6f761d852c892f84

SHA512
0283c12a8b100d7623af7b7799eadd8e050ba696882593ef8ba586566c1690f0f85e45917e135784282d2f11095f2ae2d7a62528f5c3fe93ea7f166b85b4a8b9

Download Submit
memory/2596-9-0x0000000005980000-0x0000000005990000-memory.dmp

Filesize
64KB

Download
memory/2596-5-0x0000000000DA0000-0x0000000000DF8000-memory.dmp

Filesize
352KB

Download
memory/2596-7-0x0000000005D00000-0x00000000062A4000-memory.dmp

Filesize
5.6MB

Download
memory/2596-8-0x00000000057F0000-0x0000000005882000-memory.dmp

Filesize
584KB

Download
memory/2596-10-0x00000000059A0000-0x00000000059AA000-memory.dmp

Filesize
40KB

Download
memory/2596-11-0x0000000005990000-0x0000000005998000-memory.dmp

Filesize
32KB

Download
memory/2596-12-0x0000000005C50000-0x0000000005C7C000-memory.dmp

Filesize
176KB

Download
memory/2596-13-0x0000000006450000-0x00000000064EC000-memory.dmp

Filesize
624KB

Download
memory/2596-6-0x0000000074580000-0x0000000074D30000-memory.dmp

Filesize
7.7MB

Download
memory/2596-22-0x0000000074580000-0x0000000074D30000-memory.dmp

Filesize
7.7MB

Download
memory/2912-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2912-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2912-21-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads