nymaim | 7b8b69ec09de1577c165874a5a91248a10ba20ed3d3ef9275091cb08b2dddfd1

Analysis

max time kernel
104s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25/09/2022, 23:55

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General

Target
file.exe
Size 263KB
Sample220925-3yetwshgen
SHA256 7b8b69ec09de1577c165874a5a91248a10ba20ed3d3ef9275091cb08b2dddfd1
MD5 e6bcdf0eb798c2b873e23f28ef834e19
SHA1 458138b51c260880b851ad1bdea0ee473ba0efcb
SHA512 071a4497d7e1ae0a8f51add1a940b5e2c881cca44c98439a0f1138cd474e28ae8591b8f0b05c75dddf5b2d751eddc2ac5618c2b30af405eae7924bcdcdc40382
SSDEEP 6144:CArCR98rDAuP1wFyAKibAPaf5V8NL43sb:CEe8rDQUAVAyQd48b
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
4864	Cleaner.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	file.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 11 IoCs

pid	pid_target	Process	procid_target
3092	2796	WerFault.exe	80
2384	2796	WerFault.exe	80
2436	2796	WerFault.exe	80
4184	2796	WerFault.exe	80
4992	2796	WerFault.exe	80
3128	2796	WerFault.exe	80
4460	2796	WerFault.exe	80
4564	2796	WerFault.exe	80
2264	2796	WerFault.exe	80
4168	2796	WerFault.exe	80
4912	2796	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
1920	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2796	file.exe
2796	file.exe
2796	file.exe
2796	file.exe
2796	file.exe
2796	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2796	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4864	Cleaner.exe
Token: SeDebugPrivilege	1920	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 456	2796	file.exe	101
PID 2796 wrote to memory of 456	2796	file.exe	101
PID 2796 wrote to memory of 456	2796	file.exe	101
PID 456 wrote to memory of 4864	456	cmd.exe	103
PID 456 wrote to memory of 4864	456	cmd.exe	103
PID 2796 wrote to memory of 216	2796	file.exe	114
PID 2796 wrote to memory of 216	2796	file.exe	114
PID 2796 wrote to memory of 216	2796	file.exe	114
PID 216 wrote to memory of 1920	216	cmd.exe	118
PID 216 wrote to memory of 1920	216	cmd.exe	118
PID 216 wrote to memory of 1920	216	cmd.exe	118

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 468
  2⤵
  - Program crash
  PID:3092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 764
  2⤵
  - Program crash
  PID:2384
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 772
  2⤵
  - Program crash
  PID:2436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 788
  2⤵
  - Program crash
  PID:4184
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 780
  2⤵
  - Program crash
  PID:4992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 928
  2⤵
  - Program crash
  PID:3128
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1020
  2⤵
  - Program crash
  PID:4460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1372
  2⤵
  - Program crash
  PID:4564
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\e7t9PWJ3TiJ2F\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:456
- - C:\Users\Admin\AppData\Local\Temp\e7t9PWJ3TiJ2F\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\e7t9PWJ3TiJ2F\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1336
  2⤵
  - Program crash
  PID:2264
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1656
  2⤵
  - Program crash
  PID:4168
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:216
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 564
  2⤵
  - Program crash
  PID:4912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2796 -ip 2796
1⤵
PID:3172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 2796 -ip 2796
1⤵
PID:1700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2796 -ip 2796
1⤵
PID:3376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 2796 -ip 2796
1⤵
PID:4620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2796 -ip 2796
1⤵
PID:3980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 2796 -ip 2796
1⤵
PID:3976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 2796 -ip 2796
1⤵
PID:2552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 608 -p 2796 -ip 2796
1⤵
PID:4312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 2796 -ip 2796
1⤵
PID:3136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2796 -ip 2796
1⤵
PID:204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 592 -p 2796 -ip 2796
1⤵
PID:4372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

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\e7t9PWJ3TiJ2F\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\e7t9PWJ3TiJ2F\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\e7t9PWJ3TiJ2F\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/2796-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2796-137-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/2796-136-0x00000000005A0000-0x00000000006A0000-memory.dmp

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memory/2796-135-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/2796-133-0x00000000005A0000-0x00000000006A0000-memory.dmp

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memory/2796-153-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/2796-134-0x00000000022D0000-0x000000000230F000-memory.dmp

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memory/4864-146-0x00007FFE846B0000-0x00007FFE85171000-memory.dmp

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memory/4864-145-0x000002761C640000-0x000002761C682000-memory.dmp

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memory/4864-143-0x00007FFE846B0000-0x00007FFE85171000-memory.dmp

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memory/4864-142-0x0000027600A30000-0x0000027600BB0000-memory.dmp

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