nymaim | 8762d59c25f820d3eb0b19612c5d81e7c6557fc85778a1f9d2cdbdba5bdf8cbf

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/12/2022, 06:02

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General

Target
file.exe
Size 2.1MB
Sample221209-grflysce46
SHA256 8762d59c25f820d3eb0b19612c5d81e7c6557fc85778a1f9d2cdbdba5bdf8cbf
MD5 af37d82ee2a10b6dbbed8c8bf52d6582
SHA1 698888f6c868c837306afb5722ad5124456b3529
SHA512 69cf503a5db2aa0c79aae00cd9117a84a5e6eb2409f22c907facf09c28250348e03f7fa12af8f94703c7d4fdd64895a0995e7f73aa173dd1b9292642b80c2fa8
SSDEEP 49152:GMQ7MRIBRdaO5/6r0uI6cWrDPUN2TTJ+74Vt4AZv:Gf9gOFh97uDPUEHJ+7/AF
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
836	is-7AE5A.tmp
4724	ntFolders.exe
3468	RoNqKSFV.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	ntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
836	is-7AE5A.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-7AE5A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1R0G5.tmp	is-7AE5A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-B5MSG.tmp	is-7AE5A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IKLE2.tmp	is-7AE5A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UPKHC.tmp	is-7AE5A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JD12N.tmp	is-7AE5A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BA74B.tmp	is-7AE5A.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7AE5A.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ntFolders.exe	is-7AE5A.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
2268	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4724	ntFolders.exe
4724	ntFolders.exe
4724	ntFolders.exe
4724	ntFolders.exe
4724	ntFolders.exe
4724	ntFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4724	ntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2268	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 836	1956	file.exe	82
PID 1956 wrote to memory of 836	1956	file.exe	82
PID 1956 wrote to memory of 836	1956	file.exe	82
PID 836 wrote to memory of 4724	836	is-7AE5A.tmp	84
PID 836 wrote to memory of 4724	836	is-7AE5A.tmp	84
PID 836 wrote to memory of 4724	836	is-7AE5A.tmp	84
PID 4724 wrote to memory of 3468	4724	ntFolders.exe	85
PID 4724 wrote to memory of 3468	4724	ntFolders.exe	85
PID 4724 wrote to memory of 3468	4724	ntFolders.exe	85
PID 4724 wrote to memory of 344	4724	ntFolders.exe	86
PID 4724 wrote to memory of 344	4724	ntFolders.exe	86
PID 4724 wrote to memory of 344	4724	ntFolders.exe	86
PID 344 wrote to memory of 2268	344	cmd.exe	88
PID 344 wrote to memory of 2268	344	cmd.exe	88
PID 344 wrote to memory of 2268	344	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Users\Admin\AppData\Local\Temp\is-4FOV4.tmp\is-7AE5A.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4FOV4.tmp\is-7AE5A.tmp" /SL4 $90064 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2005392 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:836
- - C:\Program Files (x86)\PrintFolders\ntFolders.exe
    "C:\Program Files (x86)\PrintFolders\ntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4724
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RoNqKSFV.exe
      4⤵
      Executes dropped EXE
      PID:3468
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:344
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2268

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

ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.2MB
SHA256 71f7b2db65c84f49aa07353d22be4e6400c1308c2aa6453d7922a5dd57cfbb2a
MD5 85810f6e0d7419e186d62fd0055d97a0
SHA1 a79995cac83fe9086e145ea28267c22a41e90c42
SHA512 d34f26c3940de0031ff9fa63eb86f1ce48ebb535d909a071d081f426fc1b131342e607ff71462899dcfe972ac156177e02c79c738a634db721e6fc05ae190baa
SSDEEP 49152:eWR20l6iLsKe2O9iXrl2OAxYji8wF8ZwvrGCPmx3t:eWRBldLs73iXB2OAxYe8w2ZwDGCPmx3t
MD5 SHA1 SHA512 SSDEEP

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ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.2MB
SHA256 71f7b2db65c84f49aa07353d22be4e6400c1308c2aa6453d7922a5dd57cfbb2a
MD5 85810f6e0d7419e186d62fd0055d97a0
SHA1 a79995cac83fe9086e145ea28267c22a41e90c42
SHA512 d34f26c3940de0031ff9fa63eb86f1ce48ebb535d909a071d081f426fc1b131342e607ff71462899dcfe972ac156177e02c79c738a634db721e6fc05ae190baa
SSDEEP 49152:eWR20l6iLsKe2O9iXrl2OAxYji8wF8ZwvrGCPmx3t:eWRBldLs73iXB2OAxYe8w2ZwDGCPmx3t
MD5 SHA1 SHA512 SSDEEP

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is-7AE5A.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4FOV4.tmp\is-7AE5A.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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is-7AE5A.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4FOV4.tmp\is-7AE5A.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-9OI0H.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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RoNqKSFV.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RoNqKSFV.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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RoNqKSFV.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RoNqKSFV.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/1956-157-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1956-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1956-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4724-143-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4724-148-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4724-149-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4724-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4724-144-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4724-142-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4724-156-0x0000000000400000-0x000000000153F000-memory.dmp

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