nymaim | 128027fb3f0007c35b5e88faf08e0d3de7658e784a33603eaebd39ce1e9db206

Analysis

max time kernel
90s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
27/11/2022, 22:32

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General

Target
file.exe
Size 2.2MB
Sample221127-2fycvade32
SHA256 128027fb3f0007c35b5e88faf08e0d3de7658e784a33603eaebd39ce1e9db206
MD5 f7cfbbb7e66de9e5cacf718a5660b94d
SHA1 894a43548fa69c2bf0f652e6e75c4a33526b3c9d
SHA512 ab30690ca60841afdf01115f6b01fa24e0063273e761d828a9a02c3ebcb39cd651f98133f64a1718eeb2e8fab14bd153bf25d379aaf19c025a383727d64be5c7
SSDEEP 49152:I7Jx7jY7BYaiDM22Yf8AIpvGW7Qh2tPZtkpAG5cyB:Ic7BWDMPYf3IpZ88LtkpXcyB
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
1208	is-E2792.tmp
912	PrintFolders.exe
3928	rr3YUYlAg.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1208	is-E2792.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\is-83US8.tmp	is-E2792.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-E2792.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N073M.tmp	is-E2792.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HPROM.tmp	is-E2792.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MBG2T.tmp	is-E2792.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RDUQ6.tmp	is-E2792.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9LKC2.tmp	is-E2792.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-E2792.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-E2792.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
4180	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
912	PrintFolders.exe
912	PrintFolders.exe
912	PrintFolders.exe
912	PrintFolders.exe
912	PrintFolders.exe
912	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4180	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 1208	3368	file.exe	76
PID 3368 wrote to memory of 1208	3368	file.exe	76
PID 3368 wrote to memory of 1208	3368	file.exe	76
PID 1208 wrote to memory of 912	1208	is-E2792.tmp	78
PID 1208 wrote to memory of 912	1208	is-E2792.tmp	78
PID 1208 wrote to memory of 912	1208	is-E2792.tmp	78
PID 912 wrote to memory of 3928	912	PrintFolders.exe	80
PID 912 wrote to memory of 3928	912	PrintFolders.exe	80
PID 912 wrote to memory of 3928	912	PrintFolders.exe	80
PID 912 wrote to memory of 3876	912	PrintFolders.exe	89
PID 912 wrote to memory of 3876	912	PrintFolders.exe	89
PID 912 wrote to memory of 3876	912	PrintFolders.exe	89
PID 3876 wrote to memory of 4180	3876	cmd.exe	91
PID 3876 wrote to memory of 4180	3876	cmd.exe	91
PID 3876 wrote to memory of 4180	3876	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3368
- C:\Users\Admin\AppData\Local\Temp\is-VDV66.tmp\is-E2792.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-VDV66.tmp\is-E2792.tmp" /SL4 $901DC "C:\Users\Admin\AppData\Local\Temp\file.exe" 2051800 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1208
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:912
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\rr3YUYlAg.exe
      4⤵
      Executes dropped EXE
      PID:3928
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3876
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4180

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 b79998d11d1a91b6a75a98b950e263c3c41f7362ba3f58a82eef1ec290cae006
MD5 419c5c30494646f8c9b098392b349946
SHA1 9df9dd76353470b76bd3469c50a83c413901673b
SHA512 22db27d27df21ae7f4edfb2fa9475876fbded0032171f8f8811da2f39368ac62b8e839010436b09503a6c0073e2b970c5cd35c129c067277e207dfa871c32dfe
SSDEEP 49152:D4J4Pt6kGsB8m1ZiahxwDe6ibhSJKTnsMEC:MiYgB8m14hS6ibhSATn3EC
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 b79998d11d1a91b6a75a98b950e263c3c41f7362ba3f58a82eef1ec290cae006
MD5 419c5c30494646f8c9b098392b349946
SHA1 9df9dd76353470b76bd3469c50a83c413901673b
SHA512 22db27d27df21ae7f4edfb2fa9475876fbded0032171f8f8811da2f39368ac62b8e839010436b09503a6c0073e2b970c5cd35c129c067277e207dfa871c32dfe
SSDEEP 49152:D4J4Pt6kGsB8m1ZiahxwDe6ibhSJKTnsMEC:MiYgB8m14hS6ibhSATn3EC
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-4IFVI.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-E2792.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-VDV66.tmp\is-E2792.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-E2792.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-VDV66.tmp\is-E2792.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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rr3YUYlAg.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\rr3YUYlAg.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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rr3YUYlAg.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\rr3YUYlAg.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/912-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/912-143-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/912-142-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/912-144-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/912-155-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/912-152-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/3368-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3368-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3368-156-0x0000000000400000-0x0000000000413000-memory.dmp

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