nymaim | 3bd910b2a223b6b323befbb749721525943ddca10ff60bdfb4fbb9faa5d31c40

Analysis

max time kernel
138s
max time network
141s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 04:49

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General

Target
file.exe
Size 232KB
Sample221001-ffnyhsfdg8
SHA256 3bd910b2a223b6b323befbb749721525943ddca10ff60bdfb4fbb9faa5d31c40
MD5 fb28e9499b2c654c6bf5ff40435c7551
SHA1 37404f0613b524d910948ae0dfc03f6adbb9ab88
SHA512 81e1e391f81e56679467012818cba4ace1da2e67b695c5b8b87ea00bf2106237504da6976df41e62708408d1cf70ec644b22be0fa1d4998534283b35d585a6ee
SSDEEP 6144:NWTUBXJ78Vu5fP4an8WJ0uhmw4bzmJFVi:cTo18VWvJbMFS2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1052	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
2044	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1564	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1132	1052	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
368	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1736	file.exe
1736	file.exe
1736	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1736	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1052	Cleaner.exe
Token: SeDebugPrivilege	368	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 1564	1736	file.exe	30
PID 1736 wrote to memory of 1564	1736	file.exe	30
PID 1736 wrote to memory of 1564	1736	file.exe	30
PID 1736 wrote to memory of 1564	1736	file.exe	30
PID 1564 wrote to memory of 1052	1564	cmd.exe	32
PID 1564 wrote to memory of 1052	1564	cmd.exe	32
PID 1564 wrote to memory of 1052	1564	cmd.exe	32
PID 1564 wrote to memory of 1052	1564	cmd.exe	32
PID 1052 wrote to memory of 1132	1052	Cleaner.exe	34
PID 1052 wrote to memory of 1132	1052	Cleaner.exe	34
PID 1052 wrote to memory of 1132	1052	Cleaner.exe	34
PID 1736 wrote to memory of 2044	1736	file.exe	35
PID 1736 wrote to memory of 2044	1736	file.exe	35
PID 1736 wrote to memory of 2044	1736	file.exe	35
PID 1736 wrote to memory of 2044	1736	file.exe	35
PID 2044 wrote to memory of 368	2044	cmd.exe	37
PID 2044 wrote to memory of 368	2044	cmd.exe	37
PID 2044 wrote to memory of 368	2044	cmd.exe	37
PID 2044 wrote to memory of 368	2044	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1052
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1052 -s 1048
      4⤵
      Program crash
      PID:1132
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2044
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:368

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\Cyloj4H0rCDyL1\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/1052-64-0x0000000000B70000-0x0000000000CC8000-memory.dmp

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memory/1052-67-0x00000000005B0000-0x00000000005F2000-memory.dmp

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memory/1052-65-0x000007FEFB741000-0x000007FEFB743000-memory.dmp

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memory/1736-54-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

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memory/1736-58-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/1736-57-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/1736-55-0x00000000006FD000-0x0000000000724000-memory.dmp

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memory/1736-69-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1736-74-0x00000000006FD000-0x0000000000724000-memory.dmp

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memory/1736-76-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/1736-56-0x0000000000220000-0x000000000025F000-memory.dmp

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