ermac | c86c012726be23ffb4e6e36d01a99c6729ea779380b973b7d9ee93110cfe518f

General

Target

c86c012726be23ffb4e6e36d01a99c6729ea779380b973b7d9ee93110cfe518f.apk
Size

1.7MB
MD5

3f6ce2be5a6110d2b43d807fda7c6801
SHA1

ab84d36182b83041a2d094283a013c771b79bb48
SHA256

c86c012726be23ffb4e6e36d01a99c6729ea779380b973b7d9ee93110cfe518f
SHA512

5cab4471e10d0f6cf041714cae01e38002c0176b46ae53b330efbc9ccdd970baa564cf0fd2109114d11f90a26f3c5147ba0165df261b99a439d16781e0f07b99
SSDEEP

49152:cUuRy5mLpgveKei8NSda/uHwhmvxJ5OuXnqPQ9hgSJ:QR0YptKei8oQufvnXqP2P

Score

10^/10

ermac hook banker defense_evasion discovery evasion execution impact infostealer persistence rat trojan

Malware Config

Extracted

Family

ermac

C2

http://154.90.62.12

AES_key

Extracted

Family

hook

C2

http://154.90.62.12

AES_key

Signatures

Ermac
An Android banking trojan first seen in July 2021.
banker trojan infostealer ermac
Ermac family
ermac

Ermac2 payload 1 IoCs

resource	yara_rule
behavioral1/memory/4218-0.dex	family_ermac2

Hook
Hook is an Android malware that is based on Ermac with RAT capabilities.
rat trojan infostealer hook
Hook family
hook

Loads dropped Dex/Jar 1 TTPs 1 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
Anonymous-DexFile@0xc7175000-0xc737fb98	4218	com.tencent.mm

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
banker discovery

Security Software Discovery
T1418.001

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.tencent.mm

Makes use of the framework's foreground persistence service 1 TTPs 1 IoCs

Application may abuse the framework's foreground service to continue running in the foreground.

defense_evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.tencent.mm

Queries information about the current Wi-Fi connection 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about the current Wi-Fi connection.

discovery

System Network Connections Discovery

T1421

description	ioc	Process
Framework service call	android.net.wifi.IWifiManager.getConnectionInfo	com.tencent.mm

Queries the mobile country code (MCC) 1 TTPs 1 IoCs

discovery

System Network Configuration Discovery

T1422

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.tencent.mm

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

defense_evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.tencent.mm

Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs

persistence

Broadcast Receivers

T1624.001

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.tencent.mm

Schedules tasks to execute at a specified time 1 TTPs 1 IoCs

Application may abuse the framework's APIs to perform task scheduling for initial or recurring execution of malicious code.

execution persistence

Scheduled Task/Job

T1603

description	ioc	Process
Framework service call	android.app.job.IJobScheduler.schedule	com.tencent.mm

Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs

impact

Data Encrypted for Impact

T1471

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	com.tencent.mm

Checks CPU information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	com.tencent.mm

Checks memory information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	com.tencent.mm

com.tencent.mm
1⤵
- Loads dropped Dex/Jar
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Queries information about the current Wi-Fi connection
- Queries the mobile country code (MCC)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Schedules tasks to execute at a specified time
- Uses Crypto APIs (Might try to encrypt user data)
- Checks CPU information
- Checks memory information
PID:4218

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

1

T1603

Persistence

Event Triggered Execution

1

T1624

Broadcast Receivers

1

T1624.001

Foreground Persistence

Scheduled Task/Job

Privilege Escalation

Defense Evasion

Download New Code at Runtime

1

T1407

Foreground Persistence

1

T1541

Hide Artifacts

1

T1628

User Evasion

1

T1628.002

Virtualization/Sandbox Evasion

2

T1633

System Checks

2

T1633.001

Credential Access

Discovery

Software Discovery

1

T1418

Security Software Discovery

1

T1418.001

System Information Discovery

2

T1426

System Network Configuration Discovery

2

T1422

System Network Connections Discovery

1

T1421

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

1

T1471

Replay Monitor

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Downloads

/data/data/com.tencent.mm/.McAfee/libMcAfeev1.so

Filesize
314KB

MD5
631820b93e84bc15ed351531f75f8530

SHA1
492789aacb276111e780c1cc69330fa386a388bf

SHA256
c4b5f4214f1f2c99ba5c7409f5b02cdeebfcb44d1b994c7e31d61aaa455e9123

SHA512
edbe1484c6d887e37865ce8603ca095acc5327dfa36df807e453d0a59bbb4b2bc182379eb86fa9feaac76a1c5291212deb35b2f7b999a1af00395f493b108a2d

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
81929ac97e9ade284715c0c29c0d7baf

SHA1
d4f0abae823d85147c580f1adc8990ca6cc17f7b

SHA256
9fe2c8e5ff5b9678a32d9ae631101015a81bbf8193bbbab9850d946354c66933

SHA512
506c05e3f3db4018bc1a6e26e992a35556b3a13aceb150572cca0ecac8bf24b67c9c7868812990f368e57c4522f678a0577c18fbe2b1dde517c556173dccbf91

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
bc59965ba5a263897fd23011c94a55ba

SHA1
b5200ea425358f51f6e356f2cc2b07bda8e7cd74

SHA256
122d536fe0f19096e5e03b0ad6784c4ea0ab81fb3f3615b32247f386f9a5bfb1

SHA512
066695fba9213c8e8d13f3f43ff23c497391660b59d0a5181a6e5cbe974ab61d030c0ead5a294b0eda62ea885fb8879991b2965e944430f187af3fae85c6ee6d

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
112KB

MD5
f77430980fb7ca6866ed2b91b486e62e

SHA1
c37d5c8708f47db2e7b3f16e18d014a5e163c017

SHA256
ec663c81111ade49bc0d7e58330314377d2578bf66b37fa056e600640a98319c

SHA512
43b75c30e12be418fe9aadd9adf77e3211107bf9814fcd47580a0723866584b084077092f0842dc058e05e4a7f27effaf3afa7f82ff70abc38aeaff1b4e7b8ca

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
185KB

MD5
88b1bc42e4ab417669cf9f8178929f8f

SHA1
dd752e4045651d2892e330e8e1394a1cef286b2a

SHA256
5eacbd694607037b664e5bfe374bd501fd53efe5c0a974559d2062b1e1774c18

SHA512
4b24ec3da7009c9c07e4258b46cac9c1e58b7ce64b6b75912918629f2620ce738911a3cb0288e5a1458f9baef5558e4fd8037ccaae73b52c6fe4e37510cf3883

Download Submit
Anonymous-DexFile@0xc7175000-0xc737fb98

Filesize
2.0MB

MD5
40cb56a4d76414296a84bfed60b6c127

SHA1
6b2a5132dd77022708b2b9959737f8377a93a465

SHA256
9364ddf46fe1bf90cebac61bc7cbba8707de8158ce444a8fb43220dd50d0699d

SHA512
ea743dbf8e188e17589a443c49bbd07d5ebef8edd8a02b40f32bdd9fdbfcdcc63e298f6c4cbd27cfcd9033fc9382b30b0c5fec3e60e400f2dca34a40f5815a02

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads