nymaim | 89e05719123fd3a8e75a7bbeb2d46b6eb91797e8b5013a61b55b0d9badfdbb73

Analysis

max time kernel
119s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2022, 00:32

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General

Target
file.exe
Size 2.5MB
Sample221212-avmfcaaa69
SHA256 89e05719123fd3a8e75a7bbeb2d46b6eb91797e8b5013a61b55b0d9badfdbb73
MD5 8cb9a53b08ef0e2076091cd26260c3d7
SHA1 0936199e42084c8a7b63fbb11a1fc0bfa67288cf
SHA512 87c57981f89424b373638661042ca1c59e5f50314709c4e0ab87ccdf97f2f9fb7db4fcecc6a9c66d37e502ecef97a28e295203e7e878a40f26d689ab8e5c85ab
SSDEEP 49152:dv8GXw7KXMKWbMHgNZ6Qrovbb/Jc+IyXziNxGzzeynZFFr6BAPqQjO:drAGcdMAv6QcvbVsyjiNYzFrUVH
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
408	is-LTFF0.tmp
3548	nvFolders.exe
3192	A1Fz08349.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	nvFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
408	is-LTFF0.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-LTFF0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IITDG.tmp	is-LTFF0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-19C6S.tmp	is-LTFF0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CK7K4.tmp	is-LTFF0.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-LTFF0.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nvFolders.exe	is-LTFF0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-B3AN7.tmp	is-LTFF0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UJEB6.tmp	is-LTFF0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-K6NLH.tmp	is-LTFF0.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1972	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3548	nvFolders.exe
3548	nvFolders.exe
3548	nvFolders.exe
3548	nvFolders.exe
3548	nvFolders.exe
3548	nvFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3548	nvFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1972	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 408	4000	file.exe	85
PID 4000 wrote to memory of 408	4000	file.exe	85
PID 4000 wrote to memory of 408	4000	file.exe	85
PID 408 wrote to memory of 3548	408	is-LTFF0.tmp	86
PID 408 wrote to memory of 3548	408	is-LTFF0.tmp	86
PID 408 wrote to memory of 3548	408	is-LTFF0.tmp	86
PID 3548 wrote to memory of 3192	3548	nvFolders.exe	87
PID 3548 wrote to memory of 3192	3548	nvFolders.exe	87
PID 3548 wrote to memory of 3192	3548	nvFolders.exe	87
PID 3548 wrote to memory of 2060	3548	nvFolders.exe	105
PID 3548 wrote to memory of 2060	3548	nvFolders.exe	105
PID 3548 wrote to memory of 2060	3548	nvFolders.exe	105
PID 2060 wrote to memory of 1972	2060	cmd.exe	107
PID 2060 wrote to memory of 1972	2060	cmd.exe	107
PID 2060 wrote to memory of 1972	2060	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\is-3RLFK.tmp\is-LTFF0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-3RLFK.tmp\is-LTFF0.tmp" /SL4 $C01C4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2328713 171520
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:408
- - C:\Program Files (x86)\PrintFolders\nvFolders.exe
    "C:\Program Files (x86)\PrintFolders\nvFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:3548
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\A1Fz08349.exe
      4⤵
      Executes dropped EXE
      PID:3192
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nvFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nvFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2060
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nvFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

nvFolders.exe

Path C:\Program Files (x86)\PrintFolders\nvFolders.exe
Size 3.6MB
SHA256 3ed4076202d6c90fb4f794c5614524cb8ce9d5004fbf5a98b7202035b7515524
MD5 0032dd266c0096c32f115170dcaaed63
SHA1 bd3973ded109a38342bc3f0b89eda7ec6ca2b746
SHA512 f21ae702723ee308737b522ac256784181f1ace890e59c609683167170a8041504161f90f2102e3457ded6eec32b05aea7d7642f2ccc0c9d1eab2c978c23f53d
SSDEEP 98304:+rAAKB/G3peLT/2Lf3sU5DJDzh30phmAbgXFOx:0i6cx
MD5 SHA1 SHA512 SSDEEP

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nvFolders.exe

Path C:\Program Files (x86)\PrintFolders\nvFolders.exe
Size 3.6MB
SHA256 3ed4076202d6c90fb4f794c5614524cb8ce9d5004fbf5a98b7202035b7515524
MD5 0032dd266c0096c32f115170dcaaed63
SHA1 bd3973ded109a38342bc3f0b89eda7ec6ca2b746
SHA512 f21ae702723ee308737b522ac256784181f1ace890e59c609683167170a8041504161f90f2102e3457ded6eec32b05aea7d7642f2ccc0c9d1eab2c978c23f53d
SSDEEP 98304:+rAAKB/G3peLT/2Lf3sU5DJDzh30phmAbgXFOx:0i6cx
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-3FK7Q.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-LTFF0.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-3RLFK.tmp\is-LTFF0.tmp
Size 760KB
SHA256 b4ef6313468f57e2134646e25a50b41dd568938b4851fd63a42ffe3d9a3ab317
MD5 a322b20a784ea4c33e6c79160c56e0a6
SHA1 69b4788c3da60a5d4c3a6a2549c42b0953ad7086
SHA512 b219ad0ed9573f00df880b6747ce4c062d5e25904615e7f04d247c0703d2c405fa6e1906dd4bde91ea50bd926a801a48adcb591eb64e59c07ab0a9f8f85f4f64
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvRtq2xO0:y5NoqWolrP837JzHvA6yknyWFxvRt3xz
MD5 SHA1 SHA512 SSDEEP

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is-LTFF0.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-3RLFK.tmp\is-LTFF0.tmp
Size 760KB
SHA256 b4ef6313468f57e2134646e25a50b41dd568938b4851fd63a42ffe3d9a3ab317
MD5 a322b20a784ea4c33e6c79160c56e0a6
SHA1 69b4788c3da60a5d4c3a6a2549c42b0953ad7086
SHA512 b219ad0ed9573f00df880b6747ce4c062d5e25904615e7f04d247c0703d2c405fa6e1906dd4bde91ea50bd926a801a48adcb591eb64e59c07ab0a9f8f85f4f64
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvRtq2xO0:y5NoqWolrP837JzHvA6yknyWFxvRt3xz
MD5 SHA1 SHA512 SSDEEP

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A1Fz08349.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\A1Fz08349.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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A1Fz08349.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\A1Fz08349.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/3548-143-0x0000000000400000-0x00000000015A3000-memory.dmp

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memory/3548-142-0x0000000000400000-0x00000000015A3000-memory.dmp

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memory/3548-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3548-151-0x0000000000400000-0x00000000015A3000-memory.dmp

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memory/3548-154-0x0000000000400000-0x00000000015A3000-memory.dmp

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memory/4000-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/4000-137-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/4000-155-0x0000000000400000-0x0000000000430000-memory.dmp

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